Systems for use in monitoring loading devices and patient transport apparatuses

Abstract

A system including a monitoring system, a patient transport apparatus having and a track assembly with a belt for engaging stairs, and a loading device configured to engage the patient transport apparatus for loading and unloading from a transport vehicle. The loading device includes a stage, a receiver arranged for translational movement relative to the stage between a lowered position and a raised position, and a dock operatively attached to the receiver for supporting the patient transport apparatus. The monitoring system includes a monitor controller in communication with a sensing system for monitoring the loading device is configured to activate an output device arranged remotely from the loading device in response to one or more signals received from the sensing system satisfying a predetermined condition for communicating a status of the loading device to a caregiver.

Description

Docket No. 060252.01180SYSTEMS FOR USE IN MONITORING LOADING DEVICES AND PATIENT TRANSPORT APPARATUSES CROSS-REFERENCE TO RELATED APPLICATION(S)

[0001] This application claims priority to and all the benefits of U.S. Provisional Patent Application No. 63 / 737,869 filed on December 23, 2024, the disclosure of which is hereby incorporated by reference in its entirety.BACKGROUND

[0002] In various environments, persons with limited mobility may have difficulty traversing stairs without assistance. In certain emergency situations, traversing stairs may be the only viable option for exiting a building. Here, in order for a caregiver to transport a patient along stairs in a safe and controlled manner, a stair chair or evacuation chair may be utilized to facilitate safe stair traversal. Stair chairs are adapted to transport seated patients either up or down flights of stairs, with two caregivers typically supporting, stabilizing, or otherwise carrying the stair chair with the patient supported thereon. The stair chair may be powered and include a battery and an electric motor, which further aids the caregiver when transporting heavy patients or on steeply inclined stairs.

[0003] The stair chair is generally transported inside an ambulance to the location of a patient. Within the ambulance, space is generally limited. Tightly packing all of the tools and supplies carried on an ambulance negatively impacts the time required to retrieve an item. An ambulance may have one or more exterior storage compartments that can be used to efficiently store that are only needed once the ambulance has arrived at the location of the patient.

[0004] Because patients are moved off of stair chairs and onto cots in order to facilitate patient transit on the ambulance, caregivers will sometimes forget to re-secure the stair chair within the storage compartment after the patient is moved to the cot, meaning that the stair chair may be inadvertently left at an indecent scene or otherwise lost.

[0005] There remains a need in the art to overcome one or more of the disadvantages in the art described above.SUMMARY

[0006] The present disclosure provides a system for use with a transport vehicle, the system may include: a patient transport apparatus including: a support structure having a seat section and being movable between a stowed configuration and one or more patient transport configurations,Docket No. 060252.01180a track assembly operatively attached to the support structure and including a movable belt for engaging stairs in one of the one or more patient transport configurations, a loading device configured to engage the patient transport apparatus in the stowed configuration for loading and unloading from the transport vehicle, the loading device including: a mount configured for mounting to the transport vehicle, a stage operatively attached to the mount, a receiver arranged for movement relative to the stage between a lowered position and a raised position, and a dock operatively attached to the receiver for supporting the patient transport apparatus for concurrent movement with the receiver relative to the stage between the lowered position and the raised position; a sensing system for monitoring the loading device; an output device arranged remotely from the loading device; and a monitor controller in communication with the sensing system and the output device, the monitor controller being configured to activate the output device in response to one or more signals received from the sensing system satisfying a predetermined condition for communicating a status of the loading device to a caregiver.

[0007] The present disclosure also provides a system for use in securing a patient transport apparatus to a transport vehicle, the patient transport apparatus including a support structure operable in a stowed configuration and having a track assembly with a movable belt for engaging stairs, the system may include: a loading device configured to engage the patient transport apparatus in the stowed configuration for loading and unloading from the transport vehicle, the loading device including a dock configured for releasably securing the patient transport apparatus to the transport vehicle for transit in a secured configuration; and a monitoring system including: a sensing system for monitoring one or more of the loading device and the patient transport apparatus, an output device arranged remotely from the loading device, and a monitor controller in communication with the sensing system and the output device, the monitor controller being configured to activate the output device in response to one or more signals received from the sensing system satisfying a predetermined condition for communicating a status of one or more of the loading device and the patient transport apparatus to a caregiver.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Advantages of the present disclosure will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings.Docket No. 060252.01180

[0009] Figure 1 A is an environmental view of a system including a patient transport apparatus shown adjacent to a transport vehicle having a loading device for loading the patient transport apparatus into a first cargo area, the loading device shown in a lowered position.

[0010] Figure IB is another environmental view of the system of Figure 1A, shown with the patient transport apparatus retained to the loading device in the lowered position.

[0011] Figure 1C is another environmental view of the system of Figure IB, shown with the patient transport retained to the loading device and with the loading device arranged in a raised position.

[0012] Figure ID is another environmental view of the system of Figure 1C, shown with a door of the transport vehicle closed to limit access to the first cargo area.

[0013] Figure 2A is an environmental view of another version of the system of Figure 1A, shown with the transport vehicle having a loading device arranged in a secured configuration in a raised position retracted into a second cargo area of the transport vehicle.

[0014] Figure 2B is another environmental view of the system of Figure 2A, shown with the loading device arranged in an intermediate configuration extended out of the transport vehicle and in the raised position.

[0015] Figure 2C is another environmental view of the system of Figure 2B, shown with the loading device arranged in an access configuration extended out of the transport vehicle and in the lowered position for receiving the patient transport apparatus.

[0016] Figure 3A is another environmental view of the system of Figure 2C, shown with the patient transport apparatus loaded and retained to the loading device in the lowered position and extended out of the transport vehicle.

[0017] Figure 3B is another environmental view of the system of Figure 3A, shown with the patient transport apparatus loaded and retained to the loading device in the raised position and extended out of the transport vehicle.

[0018] Figure 3C is another environmental view of the system of Figure 3B, shown with the patient transport apparatus loaded and retained to the loading device in the raised position and retracted into the second cargo area of the transport vehicle.

[0019] Figure 4 is a front perspective view of the patient transport apparatus of the system of Figures 1 A-3C, shown arranged in a stair configuration for supporting a patient for transport alongDocket No. 060252.01180stairs, and shown with a track assembly disposed in a deployed position, and with a handle assembly disposed in an extended position.

[0020] Figure 5 is another front perspective view of the patient transport apparatus of Figure 4, shown arranged in a chair configuration for supporting a patient for transport along a floor surface, and shown with a track assembly disposed in a retracted position, and with a handle assembly disposed in a collapsed position.

[0021] Figure 6 is a rear perspective view of the patient transport apparatus of Figures 4 and 5, shown arranged in the stair configuration as depicted in Figure 4, and shown having an extension lock mechanism, a folding lock mechanism, and a deployment lock mechanism.

[0022] Figure 7 is a partial schematic view of a control system of the patient transport apparatus of Figures 4-6, shown with a controller disposed in communication with a battery, a user interface, and a drive system.

[0023] Figure 8 is a right-side plan view of the patient transport apparatus of Figures 4-7, shown arranged in a stowed configuration maintained by the folding lock mechanism.

[0024] Figure 9 A is another right-side plan view of the patient transport apparatus arranged in the chair configuration and with the handle assembly in a collapsed position.

[0025] Figure 9B is another right-side plan view of the patient transport apparatus arranged in the stair configuration and with the handle assembly in an intermediate position.

[0026] Figure 9C is another right-side plan view of the patient transport apparatus arranged in the stair configuration and with the handle assembly in an extended position.

[0027] Figure 10A is a partial rear perspective view of the patient transport apparatus of Figures 4-9C, shown arranged in the stowed configuration as depicted in Figure 3B, with the deployment lock mechanism shown retaining the track assembly in the retracted position.

[0028] Figure 10B is another partial rear perspective view of the patient transport apparatus of Figure 10 A, shown arranged in the stowed configuration, with the deployment lock mechanism shown retaining the track assembly in the deployed position.

[0029] Figure 11 is a rear view of the back side of the patient transport apparatus of Figure 3B depicting the user interface.

[0030] Figure 12A is a right-side plan view of the patient transport apparatus of Figure 3B, shown supporting a patient in the chair configuration on a floor surface adjacent to stairs, and shown with a first caregiver engaging a pivoting handle assembly.Docket No. 060252.01180

[0031] Figure 12B is another right-side plan view of the patient transport apparatus of Figure 12 A, shown with the first caregiver having engaged the deployment lock mechanism to move the track assembly out of the retracted position and a second caregiver engaging a front handle assembly in an extended position.

[0032] Figure 12C is another right-side plan view of the patient transport apparatus of Figure 12B, shown having moved towards the stairs for descent while supported by the first and second caregivers.

[0033] Figure 12D is another right-side plan view of the patient transport apparatus of Figure 12C, shown having moved initially down the stairs for descent to bring a belt of the track assembly into contact with the stairs while still supported by the first and second caregivers.

[0034] Figure 12E is another right-side plan view of the patient transport apparatus of Figure 12D, shown with the belt of the track assembly in contact with the stairs while still supported by the first and second caregivers.

[0035] Figure 12F is another right-side plan view of the patient transport apparatus of Figure 12E, shown with the belt of the track assembly in contact with the stairs while still supported by the first and second caregivers.

[0036] Figure 13 is a perspective view of the loading device of the system depicted in Figures 2A-3C, shown having a stage arranged in a lowered position and a second stage arranged in an extended position.

[0037] Figure 14 is a perspective view of the loading device of the system depicted in Figures 1A-1C, shown having a stage arranged in a raised position.

[0038] Figure 15 is a partial, exploded perspective view of the loading device of Figure 14, shown having a retainer and a torque translator.

[0039] Figure 16 is a perspective view of the loading device of Figures 14-15 shown retaining the patient transport apparatus.

[0040] Figure 17 is a top-side plan view of the loading device of the system of Figures 14-16.

[0041] Figure 18A is a sectional view depicting the loading device of the system taken along line 18-18 in Figure 17, shown with the retainer arranged in a released position.

[0042] Figure 18B is another sectional view of the system of Figure 18 A, shown with the retainer of the loading device arranged in a retained position engaging the patient transport apparatus.Docket No. 060252.01180

[0043] Figure 19A is a sectional view depicting the loading device of the system taken along line 19-19 in Figure 17, shown depicting the torque translator.

[0044] Figure 19B is another sectional view of the system of Figure 19 A, shown with the torque translator engaging a track assembly of the patient transport apparatus.

[0045] Figure 20 is a schematic view depicting portions of a monitoring system of the system of Figures 1-19B, shown with the patient transport apparatus spaced from the loading device.

[0046] Figure 21 is another schematic view of the monitoring system of Figure 20, shown with the patient transport apparatus secured to the loading device.

[0047] Figure 22A is a partial perspective of a driver compartment of the transport vehicle of Figures 1A-3C, shown with a monitor interface of the monitoring system of Figures 20-21 arranged to communicate a status of the loading device to a caregiver.

[0048] Figure 22B is another partial perspective view of the monitoring interface in the driver compartment of Figure 22A, shown with an audible indicator generating an alarm and with a light emitting diode emitting light to communicate the status.

[0049] Figure 22C is another partial perspective view of the monitoring interface in the driver compartment of Figure 22B, shown with the audible indicator generating a different alarm and with the light emitting diode emitting different light to communicate the status.

[0050] Figure 22D is another partial perspective view of the monitoring interface in the driver compartment of Figure 22C. shown with a display screen presenting visual content to communicate the status.

[0051] Figure 22E is another partial perspective view of the monitoring interface in the driver compartment of Figure 22D, shown with the audible indicator generating an alarm and with the display screen presenting visual content to communicate the status.

[0052] Figure 22F is another partial perspective view of the monitoring interface in the driver compartment of Figure 22E, shown with the light emitting diode emitting light and with the display screen presenting visual content to communicate the status.DETAILED DESCRIPTION

[0053] Referring now to the drawings, wherein like numerals indicate like parts throughout the several views, the present disclosure is directed toward a system 96 (also referred to herein as a “loading system”) with a loading device 98 to facilitate loading and unloading a patient transportDocket No. 060252.01180apparatus 100 relative to a transport vehicle VEH (e.g., an ambulance) for storage and transport, as described in greater detail below.

[0054] The patient transport apparatus 100 is realized as a “stair chair”, which can be operated in a chair configuration CC (see Figure 5) to transport the patient across ground or floor surfaces FS (e.g., pavement, hallways, and the like), a stair configuration SC (see Figure 4) to transport the patient along stairs ST, and a stowed (or folded) configuration FC (see Figure 8) when not being utilized to transport patients. As will be appreciated from the subsequent description below, the patient transport apparatus 100 may be stored or otherwise transported in the transport vehicle VEH in the stowed configuration FC.

[0055] In Figures 1A-1C, a first exemplary transport vehicle VEH is shown as an ambulance. The transport vehicle VEH has an interior volume VI in which a patient and caregivers are located during use. The interior volume VI may include a system for loading an ambulance cot (not shown) to aid caregivers in loading the patient and cot into the transport vehicle VEH. In addition to the interior volume VI, the transport vehicle VEH may further comprise one or more storage compartments RS that define a corresponding cargo volume VC, which is accessible from an exterior of the transport vehicle VEH through a corresponding door DR. The storage compartments RS facilitate quick and easy access to equipment that a caregiver may need to aid a patient. The cargo volume VC of the storage compartment RS may further be accessible from the interior volume VI of the transport vehicle VEH in order to access the contents of the cargo volume VC while the transport vehicle VEH is moving.

[0056] In addition to the aforementioned cot, caregivers may also utilize other patient transport apparatuses 100 to facilitate patient transport during certain scenarios. More specifically, and according to versions of the present disclosure, the patient transport apparatus 100 illustrated throughout the drawings and described in greater detail below is realized as a “stair chair” which facilitates transporting a patient up and down a stairs ST. Generally, once the patient has reached the “ground floor” (i.e., the same as the transport vehicle VEH) of a particular location and is otherwise accessible by a wheeled ambulance cot, the patient is transferred from the patient transport apparatus 100 to wheeled ambulance cot and loaded into the interior volume VI of the transport vehicle VEH. As such, the patient is generally not transported within the transport vehicle VEH while seated in the patient transport apparatus 100. Said differently, unlike an ambulance cot, a patient transport apparatus 100 realized as a stair chair is intended to beDocket No. 060252.01180unoccupied when transported by the transport vehicle VEH, and caregiver access to the stair chair while the transport vehicle VEH is in motion is unnecessary. It is therefore beneficial to minimize the storage volume required to transport the patient transport apparatus 100 within the transport vehicle VEH, which may likewise increase the difficulty of loading the patient transport apparatus 100 into the transport vehicle VEH, particularly when the patient transport apparatus 100 is heavy or unwieldy.

[0057] To this end, the loading device 98 of the system 96 may be used to facilitate loading the patient transport apparatus 100 onto the transport vehicle VEH. Because the patient transport apparatus 100 is not needed while the transport vehicle VEH is in transit (e.g., while driving between a medical facility and an accident scene), the patient transport apparatus 100 may advantageously be stored in one of the storage compartments RS accessible from the exterior of the transport vehicle VEH. The system 96 may aid lifting the patient transport apparatus 100 into the associated cargo volume VC, as well as lowering the patient transport apparatus 100 towards the ground or floor surface FS. Figures 1A-1C illustrate a first such arrangement whereby the transport vehicle VEH has a first storage compartment RSI with the loading device 98 being configured to lift the patient transport apparatus 100 for placement into a first cargo volume VC1. In this version, the loading device 98 is configured to facilitate vertical movement of the patient transport apparatus 100 and is operatively attached to the door DR which, in turn, can be subsequently pivoted to position the loading device 98 loaded with the patient transport apparatus 100 into the first cargo volume VC1 (pivoting not shown in detail). While this version illustrates the door DR as being accessible from a lateral side of the transport vehicle VEH, it will be appreciated that the loading device 98 can be coupled to other doors DR of the vehicle VEH (e.g., such as to a rear door; not shown in detail) or to other components of the vehicle VEH at other locations. Furthermore, and as will be appreciated from the subsequent description of the system 96 below, the loading device 98 can be configured to move in other ways in addition to vertically. By way of illustrative example, Figures 2A-3C depict a version of the system 96 where the transport vehicle VEH has a second storage compartment RS 2 and the loading device 98 is configured to facilitate both vertical and horizontal movement of the patient transport apparatus 100. Here, rather than being operatively attached to the door DR which provides access to a second cargo volume VC2 from the exterior of the transport vehicle VEH, the loading device 98 is instead operatively attached to a wall or floor (not shown) of the vehicle VEH disposed within the secondDocket No. 060252.01180cargo volume VC2. In some versions, aspects of the loading device 98 and / or other portions of the system 96 may be similar to as is disclosed in International Patent Application No. PCT / US2024 / 026390 filed on April 26, 2024 and entitled “Folding Loading Systems For Patient Transport Apparatuses,'” and / or in International Patent Application No. PCT / US2024 / 026391 filed on April 26, 2024 and entitled “Loading Systems For Patient Transport Apparatuses,” the disclosures of each of which are hereby incorporated by reference in their entirety. The loading device 98 and the patient transport apparatus 100 of the system 96 introduced above will be described in greater detail below.

[0058] As is best shown in Figures 4-5, the patient transport apparatus 100 comprises a support structure 102 to which a seat section 104 and a back section 106 are operatively attached. The seat section 104 and the back section 106 are each shaped and arranged to provide support to the patient during transport. The support structure 102 generally includes a rear support assembly 108, a front support assembly 110, and an intermediate support assembly 112. The back section 106 is coupled to the rear support assembly 108 for concurrent movement. To this end. the rear support assembly 108 comprises a first rear upright 114A arranged on a first side of the rear support assembly 108. The rear support assembly 108 may further comprise a second read upright 114B on a second side of the rear support assembly 108, opposite the first side. The rear uprights 114A, 114B may extend generally vertically and are secured to the back section 106 such as with fasteners (not shown in detail).

[0059] The intermediate support assembly 112 and the seat section 104 are each pivotably coupled to the rear support assembly 108. More specifically, the seat section 104 is arranged so as to pivot about a rear seat axis RSA which extends through the rear uprights 114A, 114B (compare Figures 8-9A; pivoting about rear seat axis RSA not shown in detail), and the intermediate arms 118 of the intermediate support assembly 112 are arranged so as to pivot about a rear arm axis RAA which is spaced from the rear seat axis RSA and also extends through the rear uprights 114A, 114B (compare Figures 8-9A; pivoting about rear arm axis RAA not shown in detail). Furthermore, the intermediate support assembly 112 and the seat section 104 are also each pivotably coupled to the front support assembly 110. Here, the seat section 104 pivots about a front seat axis FSA which extends through the front struts 116 (compare Figures 8-9A; pivoting about front seat axis FSA not shown in detail), and the intermediate arms 118 pivot about a front arm axis FAA which is spaced from the front seat axis FSA and extends through the front strutsDocket No. 060252.01180116 (compare Figures 8-9A; pivoting about front arm axis FAA not shown in detail). The intermediate support assembly 112 is disposed generally vertically below the seat section 104 such that the rear support assembly 108, the front support assembly 110. the intermediate support assembly 112, and the seat section 104 generally define a four-bar linkage which helps facilitate movement between the stowed configuration FC (see Figure 8) and the chair configuration CC (see Figure 9A). While the seat section 104 is generally configured to remain stationary relative to the support structure 102 when operating in the chair configuration CC or in the stair configuration CC according to the illustrated versions, it is contemplated that the seat section 104 could comprise multiple components which cooperate to facilitate “sliding” movement relative to the seat section 104 under certain operating conditions, such as to position the patient's center of gravity advantageously for transport. Other configurations are contemplated.

[0060] Referring now to Figures 4-6, the front support assembly 110 includes a pair of caster assemblies 120 which each comprise a front wheel 122 arranged to rotate about a respective front wheel axis FWA and to pivot about a respective swivel axis SA (compare Figures 8-9A; pivoting about swivel axis SA not shown in detail). The caster assemblies 120 are generally arranged on opposing lateral sides of the front support assembly 110 and are operatively attached to the front struts 116. A lateral brace 124 (see Figure 6) extends laterally between the front struts 116 to, among other things, afford rigidity to the support structure 102. Here, a foot rest 126 is pivotably coupled to each of the front struts 116 adjacent to the caster assemblies 120 (pivoting not shown in detail) to provide support to the patient's feet during transport. For each of the pivotable connections disclosed herein, it will be appreciated that one or more fasteners, bushings, bearings, washers, spacers, and the like may be provided to facilitate smooth pivoting motion between various components.

[0061] The representative versions of the patient transport apparatus 100 illustrated throughout the drawings comprise different handles arranged for engagement by caregivers during patient transport. More specifically, the patient transport apparatus 100 comprises front handle assemblies 128, pivoting handle assemblies 130, and an upper handle assembly 132 (hereinafter referred to as “handle assembly 132”), each of which will be described in greater detail below. The front handle assemblies 128 are supported within the respective intermediate arms 118 for movement between a collapsed position 128A (see Figure 12A) and an extended position 128B (see Figure 12B). To this end, the front handle assemblies 128 may be slidably supported by bushings, bearings, and theDocket No. 060252.01180like (not shown) coupled to the intermediate arms 118, and may be lockable in and / or between the collapsed position 128 A and the extended position 128B via respective front handle locks 134 (see Figure 5).

[0062] Here, a caregiver may engage the front handle locks 134 (not shown in detail) to facilitate moving the front handle assemblies 128 between the collapsed position 128A and the extended position 128B. The front handle assemblies 128 are generally arranged so as to be engaged by a caregiver during patient transport up or down stairs ST when in the extended position 128B. It will be appreciated that the front handle assemblies 128 could be of various types, styles, and / or configurations suitable to be engaged by caregivers to support the patient transport apparatus 100 for movement. While the illustrated front handle assemblies 128 are arranged for telescoping movement, other configurations are contemplated. By way of non-limiting example, the front handle assemblies 128 could be pivotably coupled to the support structure 102 or other parts of the patient transport apparatus 100. In some versions, the front handle assemblies 128 could be configured similar to as is disclosed in U.S. Patent No. 6,648.343, the disclosure of which is hereby incorporated by reference in its entirety.

[0063] The pivoting handle assemblies 130 are coupled to the respective rear uprights 114A, 114B of the rear support assembly 108, and are movable relative to the rear uprights 114A, 114B between a stowed position 130A and an engagement position 130B. Like the front handle assemblies 128, the pivoting handle assemblies 130 are generally arranged for engagement by a caregiver during patient transport, and may advantageously be utilized in the engagement position 130B when the patient transport apparatus 100 operates in the chair configuration CC to transport the patient along floor surfaces FS. In some versions, the pivoting handle assemblies 130 could be configured similar to as is disclosed in U.S. Patent No. 6,648,343, previously incorporated by reference. Other configurations are contemplated.

[0064] As is best depicted in Figure 9A, the rear uprights 114A, 114B each generally extend between a lower upright end 115A and an upper upright end 115B, with the hub axis HA arranged adjacent to the lower upright end 115A. The lower upright end 115A is supported for movement within the hub 158, which may comprise a hollow profile or recess defined by multiple hub housing components. In the illustrated version, the hub axis HA is arranged generally vertically between the rear arm axis RAA and the wheel axis WA. The rear uprights 114 A, 114B may eachDocket No. 060252.01180comprise a generally hollow, extruded profile which supports various components of the patient transport apparatus 100.

[0065] As best shown in Figure 5, the handle assembly 132 includes an upper grip 136. The upper grip 136 is operatively attached to a first extension post 138A. The first extension post 138A is disposed within the first rear upright 114A. Accordingly, the first extension post 138A supports the upper grip 136 for movement of the handle assembly 132 between a collapsed position 132A where the upper grip is disposed adjacent to the user interface (see Figure 5 and an extended position 132B where the upper grip is spaced from the user interface (see Figure 4). In some examples, the upper grip 136 may extend between a first upper grip end 136 A and a second upper grip end 136B. The first extension post 138A may be operatively attached to the first upper grip end 136A. The handle assembly 132 may further include a second extension post 138B operatively attached to the second upper grip end 136B. Together, the first and second extension posts 138A, 138B may support the upper grip 136 for movement of the handle assembly 132 between the collapsed position 132 A and the extended position 132B.

[0066] In the representative version illustrated herein, the upper grip 136 generally comprises a first hand grip region 144 arranged adjacent to the first extension posts 138A, and a second hand grip region 146 arranged adjacent to the second extension post 138B, each of which may be engaged by the caregiver to support the patient transport apparatus 100 for movement, such as during patient transport up or down stairs ST (see Figures 12A-12F). The activation input controls 214 may be arranged in various locations about the patient transport apparatus 100. In the illustrated versions, a first activation input control 222 is disposed adjacent to the first hand grip region 144 of the handle assembly 132, and a second activation input control 224 is disposed adjacent to the second hand grip region 146 (best shown in Figure 5). In the illustrated version, the user interface 204 is configured such that the caregiver can engage either of the activation input controls 222, 224 with a single hand grasping the upper grip 136 (described below) of the handle assembly 132 during use.

[0067] The activation input controls 214 may be arranged between the first and second hand grip regions 144, 146 in order to facilitate user engagement of the activation input controls 214 from either of the first and second hand grip regions 144, 146. As previously discussed, the activation input controls 214 include the first activation input control 222 and the second activation input control 224. The first activation input control 222 may be disposed adjacent the first handDocket No. 060252.01180grip region 144 so as to facilitate user engagement of the first activation input control 222 from the first hand grip region 144. The second activation input control 224 may be disposed adjacent to the second hand grip region 146 so as to facilitate user engagement of the second activation input control 224 from the second hand grip region 146. Here, it will be appreciated that the user can engage either of the first and second hang grip regions 144, 146 with one of their hands to support the patient transport apparatus 100 while, at the same, using that same hand to activate one of the first and second activation input controls 222, 224 (e.g., reaching with their thumb).

[0068] The first activation input control 222 and the second activation input control 224 may be spaced apart by a predetermined distance (e.g., several inches) and are wired in parallel in some versions (not shown in detail).

[0069] Referring to Figures 9A-9C, the handle assembly 132 is configured for movement between the extended position 132B (shown in Figure 9A) where the upper grip 136 is spaced from the user interface 204 at a first distance DI, and the collapsed position 132A (shown in Figure 9C) where the upper grip 136 is disposed adjacent to the user interface 204. Additionally, the handle assembly 132 may be configured for movement to an intermediate position 132C (shown in Figure 9B) where the upper grip 136 is spaced from the user interface 204 at a second distance D2, less than the first distance DI.

[0070] As noted above, the patient transport apparatus 100 is configured for use in transporting the patient across floor surfaces FS, such as when operating in the stair configuration SC, and for transporting the patient along stairs ST when operating in the stair configuration SC. To these ends, the illustrated patient transport apparatus 100 includes one or more frame elements 147, a earner assembly 148 arranged for movement relative to the support structure 102 between the chair configuration CC and the stair configuration ST. The carrier assembly 148 generally comprises at least one shaft 150 defining a wheel axis WA, one or more rear wheels 152 supported for rotation about the wheel axis WA, at least one track assembly 154 having a belt 156 for engaging stairs ST, and one or more hubs 158 supporting the shaft 150 and the track assembly 154 and the shaft 150 for concurrent pivoting movement about a hub axis HA. Here, movement of the earner assembly 148 from the chair configuration CC (see Figure 5) to the stair configuration SC (see Figures 4 and 9B) simultaneously deploys the track assembly 154 for engaging stairs ST with the belt 156 and moves the wheel axis WA longitudinally closer to the front support assembly 110 soDocket No. 060252.01180as to position the rear wheels 152 further underneath the seat section 104 and closer to the front wheels 122.

[0071] As is described in greater detail below in connection with Figures 12A-12F. the movement of the rear wheels 152 relative to the front wheels 122 when transitioning from the chair configuration CC to the stair configuration SC that is afforded by the patient transport apparatus 100 of the present disclosure affords significant improvements in patient comfort and caregiver usability, in that the rear wheels 152 are arranged to promote stable transport across floor surfaces FS in the chair configuration CC but are arranged to promote easy transitioning from floor surfaces to stairs ST as the patient transport apparatus 100 is “tilted” backwards about the rear wheels 152 (compare Figures 12D-12F). Put differently, positioning the rear wheels 152 relative to the front wheels 122 consistent with the present disclosure makes “tilting” the patient transport apparatus 100 significantly less burdensome for the caregivers and, at the same time, much more comfortable for the patient due to the arrangement of the patient’s center of gravity relative to the portion of the rear wheels 152 contacting the floor surface FS as the patient transport apparatus 100 is “tilted” backwards to transition into engagement with the stairs ST.

[0072] In the representative versions illustrated herein, the carrier assembly 148 comprises hubs 158 that are pivotably coupled to the respective rear uprights 114A, 114B for concurrent movement about the hub axis HA. Here, one or more bearings, bushings, shafts, fasteners, and the like (not shown in detail) may be provided to facilitate pivoting motion of the hubs 158 relative to the rear uprights 114A, 114B. Similarly, bearings and / or bushings (not shown) may be provided to facilitate smooth rotation of the rear wheels 152 about the wheel axis WA. Here, the shafts 150 may be fixed to the hubs 158 such that the rear wheels 152 rotate about the shafts 150 (e.g., about bearings supported in the rear wheels 152), or the shafts 150 could be supported for rotation relative to the hubs 158. Each of the rear wheels 152 is also provided with a wheel lock 160 coupled to its respective hub 158 to facilitate inhibiting rotation about the wheel axis WA. The wheel locks 160 are generally pivotable relative to the hubs 158, and may be configured in a number of different ways without departing from the scope of the present disclosure. While the representative version of the patient transport apparatus 100 illustrated herein employs hubs 158 with “mirrored” profiles that are coupled to the respective rear uprights 114A, 114B and support discrete shafts 150 and wheel locks 160, it will be appreciated that a single hub 158 and / or a single shaft 150 could be employed. Other configurations are contemplated.Docket No. 060252.01180

[0073] Referring now to Figures 10A-10B, the illustrated version of the patient transport apparatus 100 employs a pair of track assemblies 154 which move concurrently with the hubs 158 between the chair configuration CC and the stair configuration SC. Here, the track assemblies 154 are arranged in a retracted position 154A when the carrier assembly 148 is disposed in the chair configuration CC, and are disposed in a deployed position 154B when the carrier assembly 148 is disposed in the stair configuration SC. As is described in greater detail below, the illustrated patient transport apparatus 100 comprises a deployment linkage 162 and a deployment lock mechanism 164 with a deployment lock release 166 arranged for engagement by the caregiver to facilitate changing between the retracted position 154A and the deployed position 154B (and, thus, between the chair configuration CC and the stair configuration SC).

[0074] In the illustrated version, the patient transport apparatus 100 comprises laterally- spaced track assemblies 154 each having a single belt 156 arranged to contact stairs ST. However, it will be appreciated that other configurations are contemplated, and a single track assembly 154 and / or track assemblies with multiple belts 156 could be employed. The track assemblies 154 each generally comprise a rail 168 extending between a first rail end 168 A and a second rail end 168B. The second rail end 168B is operatively attached to the hub 158, such as with one or more fasteners (not shown in detail). An axle 170 defining a roller axis RA is disposed adjacent to the first rail end 168A of each rail 168, and a roller 172 is supported for rotation about the roller axis RA. For each of the track assemblies 154, the belt 156 is disposed in engagement with the roller 172 and is arranged for movement relative to the rail 168 in response to rotation of the roller 172 about the roller axis RA.

[0075] The track assemblies 154 may further comprise a cross brace 173 extending laterally therebetween. The cross brace 173 is coupled to the rail 168 of each track assembly 154 to effect coordinated motion of the track assemblies 154. Said differently, movement of one of the track assemblies 154 between the retracted position 154A and the deployed position 154B causes corresponding movement of the other track assembly 154. The cross brace 173 may further provide increased resistance to deflection of the track assemblies 154 when subjected to lateral loads near the first rail end 168 A by transferring force exerted on one track assembly 154 to the other track assembly 154. The cross brace 173 may be coupled to the rails 168 with threaded fasteners or may be permanently coupled to the rails 168 by way of a welding process.Docket No. 060252.01180

[0076] Adjacent to the second rail end 168B of each rail 168, a drive pulley 174 is supported for rotation about a drive axis DA and is likewise disposed in engagement with the belt 156 (see Figures 10A-10B; rotation about drive axis DA not shown in detail). Here, the drive pulley 174 comprises outer teeth 176 which are disposed in engagement with inner teeth 178 formed on the belt 156. The track assemblies 154 each also comprise a belt tensioner, generally indicated at 180, configured to adjust tension in the belt 156 between the roller 172 and the drive pulley 174.

[0077] In the representative version illustrated herein, the patient transport apparatus 100 comprises a drive system, generally indicated at 182, configured to facilitate driving the belts 156 of the track assemblies 154 relative to the rails 168 to facilitate movement of the patient transport apparatus 100 up and down stairs ST. To this end, and as is depicted in Figure 10A, the drive system 182 comprises a drive frame 184 and a cover 186 which are operatively attached to the hubs 158 of the carrier assembly 148 for concurrent movement with the track assemblies 154 between the retracted position 154A and the deployed position 154B. A motor 188 (depicted in phantom in Figure 10A) is coupled to the drive frame 184 and is concealed by the cover 186. The motor 188 is configured to selectively generate rotational torque used to drive the belts 156 via the drive pulleys 174, as described in greater detail below. To this end, a drive axle 190 is coupled to each of the drive pulleys 174 and extends along the drive axis DA laterally between the track assemblies 154. The drive axle 190 is rotatably supported by the drive frame 184, such as by one or more bearings, bushings, and the like (not shown in detail). A geartrain 192 is disposed in rotational communication between the motor 188 and the drive axle 190. To this end, in the version depicted in Figure 10A, the geartrain 192 comprises a first sprocket 194, a second sprocket 196, and an endless chain 198. Here, the motor 188 comprises an output shaft 200 to which the first sprocket 194 is coupled, and the second sprocket 196 is coupled to the drive axle 190. The endless chain 198, in turn, is supported about the first sprocket 194 and the second sprocket 196 such that the drive axle 190 and the output shaft 200 rotate concurrently. The geartrain 192 may be configured so as to adjust the rotational speed and / or torque of the drive axle 190 relative to the output shaft 200 of the motor, such as by employing differently-configured first and second sprockets 194, 196 (e.g., different diameters, different numbers of teeth, and the like).

[0078] While the representative version of the drive system 182 illustrated herein utilizes a single motor 188 to drive the belts 156 of the track assemblies 154 concurrently using a chainbased geartrain 192, it will be appreciated that other configurations are contemplated. By way ofDocket No. 060252.01180non-limiting example, multiple motors 188 could be employed, such as to facilitate driving the belts 156 of the track assemblies 154 independently. Furthermore, different types of geartrains 192 are contemplated by the present disclosure, including without limitation the geartrains 192 which comprise various arrangements of gears, planetary gearsets, and the like.

[0079] The patient transport apparatus 100 comprises a control system 202 to, among other things, facilitate control of the track assemblies 154. To this end, and as is depicted schematically in Figure 7, the representative version of the control system 202 generally comprises a user interface 204, a battery 206, one or more sensors 208. and one or more back light modules 210 which are disposed in electrical communication with a controller 212. As will be appreciated from the subsequent description below, the controller 212 may be of a number of different types, styles, and / or configurations, and may employ one or more microprocessors for processing instructions or an algorithm stored in memory to control operation of the motor 188, the light modules 210, and the like. Additionally or alternatively, the controller 212 may comprise one or more subcontrollers. microcontrollers, field programmable gate arrays, systems on a chip, discrete circuitry, and / or other suitable hardware, software, and / or firmware that is capable of carrying out the functions described herein.

[0080] The controller 212 is coupled to various electrical components of the patient transport apparatus 100 (e.g., the motor 188) in a manner that allows the controller 212 to control or otheiwise interact with those electrical components the (e.g., via wired and / or wireless electrical communication). In some versions, the controller 212 may generate and transmit control signals to the one or more powered devices, or components thereof, to drive or otherwise facilitate operating those powered devices, or to cause the one or more powered devices to perform one or more of their respective functions.

[0081] The controller 212 may utilize various types of sensors 208 of the control system 202, including without limitation force sensors (e.g.. load cells), timers, switches, optical sensors, electromagnetic sensors, motion sensors, accelerometers, potentiometers, infrared sensors, ultrasonic sensors, mechanical limit switches, membrane switches, encoders, hall-effect sensors, and / or cameras. One or more sensors 208 may be used to detect mechanical, electrical, and / or electromagnetic coupling between components of the patient transport apparatus 100. Other types of sensors 208 are also contemplated. Some of the sensors 208 may monitor thresholds movement relative to discrete reference points. The sensors 208 can be located anywhere on the patientDocket No. 060252.01180transport apparatus 100, or remote from the patient transport apparatus 100. Other configurations are contemplated.

[0082] The battery 206 provides power to the controller 212, the motor 188, the light modules 210, and other components of the patient transport apparatus 100 during use, and is removably attachable to the cover 186 of the drive system 182 in the illustrated version (see Figure 10A; attachment not shown in detail). The user interface 204 is generally configured to facilitate controlling the drive direction and drive speed of the motor 188 to move the belts 156 of the track assembly 154 and, thus, allow the patient transport apparatus 100 to ascend or descend stairs ST. Here, the user interface 204 may comprise one or more activation input controls 214 to facilitate driving the motor 188 in response to engagement by the caregiver, one or more direction input controls 216 to facilitate changing the drive direction of the motor 188 in response to engagement by the caregiver, and / or one or more speed input controls 218 to facilitate operating the motor 188 at different predetermined speeds selectable by the caregiver. The one or more direction input controls 216 and the one or more speed input controls 218 may be coupled to the rear support assembly 108 and referred to as lower input controls 219. The user interface 204 may also comprise various types of indicators 220 to display information to the caregiver. It will be appreciated that the various components of the control system 202 introduced above could be configured and / or arranged in a number of different ways, and could communicate with each other via one or more types of electrical communication facilitated by wired and / or wireless connections. Other configurations are contemplated.

[0083] In the illustrated versions, the patient transport apparatus 100 is configured to limit movement of the belts 156 relative to the rails 168 during transport along stairs ST in an absence of engagement with the activation input controls 214 by the caregiver. Put differently, one or more of the controller 212, the motor 188, the geartrain 192, and / or the track assemblies 154 may be configured to “brake” or otherwise prevent movement of the belts 156 unless the activation input controls 214 are engaged. To this end, the motor 188 may be controlled via the controller 212 to prevent rotation (e.g., driving with a 0% pulse-width modulation PWM signal) in some versions. However, other configurations are contemplated, and the patient transport apparatus 100 could be configured to prevent movement of the belts 156 in other ways. By way of non-limiting example, a mechanical brake system (not shown) could be employed in some versions.Docket No. 060252.01180

[0084] Referring now to Figure 10A, the patient transport apparatus 100 employs the deployment lock mechanism 164 to releasably secure the track assembly 154 in the retracted position 154A and in the deployed position 154B. The deployment lock release 166 is arranged for engagement by the caregiver to move between the retracted position 154A and the deployed position 154B. The deployment lock mechanism 164 is coupled to the track assemblies 154 for concurrent movement, and the deployment linkage 162 is coupled between the deployment lock mechanism 164 and the support structure 102. The illustrated deployment linkage 162 generally comprises connecting links 226 which are pivotably coupled to the support structure 102, and brace links 228 which are coupled to the deployment lock mechanism 164 and are respectively pivotably coupled to the connecting links 226.

[0085] The connecting links 226 each comprise or otherwise define a forward pivot region 230, a connecting pivot region 232, a trunnion region 234, and an interface region 236. The forward pivot regions 230 extend from the interface regions 236 to forward pivot mounts 238 which are pivotably coupled to the rear uprights 114A, 114B about the rear seat axis RSA, such as by one or more fasteners, bushings, bearings, and the like (not shown in detail). Here, because the rear uprights 114A, 114B are spaced laterally away from each other at a distance large enough to allow the track assemblies 154 to “nest” therebetween in the retracted position 154A (see Figure 10A), the forward pivot regions 230 of the connecting links 226 extend at an angle away from the rear uprights 114A, 114B at least partially laterally towards the track assemblies 154.

[0086] The trunnion regions 234 extend generally vertically downwardly from the interface regions 236 to trunnion mount ends 240, and comprise trunnions 242 which extend generally laterally and are arranged to abut trunnion catches 244 of the deployment lock mechanism 164 to retain the track assemblies 154 in the retracted position 154A (see Figure 10A). The connecting pivot regions 232 extend longitudinally away from the interface regions 236 to rearward pivot mounts 246 which pivotably couple to the brace links 228 about a link axis LA. The connecting links 226 are each formed as separate components with mirrored profiles in the illustrated versions, but could be realized in other ways, with any suitable number of components.

[0087] The brace links 228 each generally extend between an abutment link end 250 and a rearward link mount 252, with a forward link mount 254 arranged therebetween. The forward link mounts 254 are pivotably coupled to the rearward pivot mounts 246 of the connecting links 226 about the link axis LA, such as by one or more fasteners, bushings, bearings, and the like (notDocket No. 060252.01180shown in detail). The rearward link mounts 252 are each operatively attached to the deployment lock mechanism 164 about a barrel axis BA. The brace links 228 each define a link abutment surface 256 disposed adjacent to the abutment link end 250 which are arranged to abut the link stops 248 of the connecting links 226 in the deployed position 154B (see Figure 10B). The brace links 228 also define a relief region 258 formed between the forward link mount 254 and the rearward link mount 252. The relief regions 258 are shaped to at least partially accommodate the link stops 248 of the connecting links 226 when the track assemblies 154 are in the retracted position 154A (not shown in detail). The deployment linkage 162, the deployment lock mechanism 164, and the deployment lock release 166 may be similar to as is disclosed by U.S. Patent Publication No. 2021 / 0196536, the disclosure of which is hereby incorporated by reference in its entirety.

[0088] With continued reference to Figures 10A-10B and additional reference to Figure 11, the patient transport apparatus 100 employs a folding lock mechanism 284 to facilitate changing between the stowed configuration FC (see Figure 8) and the chair configuration CC (see Figure 9A). To this end, the folding lock mechanism 284 generally comprises a folding lock release 286 operatively attached to the back section 106 and arranged for engagement by the caregiver to releasably secure the folding lock mechanism 284 between a stow lock configuration to maintain the stowed configuration FC, and a use lock configuration to prevent movement to the stowed configuration FC from the chair configuration CC or from the stair configuration SC. The folding lock mechanism 284 may incorporate features as disclosed in U.S. Patent No. 6,648,343 previously incorporated by reference and as disclosed in U.S. Patent Publication No. 2021 / 0196536, previously incorporated by reference.

[0089] The drive system 182 may include various components not specifically illustrated or be configured in various ways not discussed in detail but described in U.S. Patent Publication No.2021 / 0196536. previously referenced and incorporated by reference. In a version, the motor 188 may be supported on an adjustable platform that is movable relative to the drive frame 184 to adjust slack in the endless chain. This arrangement helps to optimize power density and minimize weight in the drive system 182. It will be appreciated that this arrangement could be utilized with other types of geartrains 192, such as where a belt drive (not shown) would replace the endless chain 198. Other configurations are contemplated.Docket No. 060252.01180

[0090] In some versions, the geartrain 192 may be configured with a direct drive gearbox coupled to one of the rails 168 of the track assembly 154. Here, the drive axle 190 extends through the direct drive gearbox, and the motor 188 may be coupled to the direct drive gearbox. In some versions, the patient transport apparatus 100 may include a “passive brake” that allows the speed of the patient transport apparatus 100 to be controlled when on stairs ST even when the battery 206 is of low charge, dead, or not connected to the drive system 182 (e.g.. inadvertently removed).

[0091] Figures 12A-12F successively depict exemplary steps of transporting a patient supported on the patient transport apparatus 100 down the stairs ST. In Figure 12A, a first caregiver is shown engaging the pivoting handle assemblies 130 in the engagement position I30B to illustrate approaching stairs ST while the patient transport apparatus 100 is moved along floor surfaces FS in the chair configuration CC. In Figure 12B, the patient transport apparatus 100 has been moved closer to the stairs with a second caregiver engaging the front handle assemblies 128 after having moved them to the extended position 128B. The deployment lock release 166 was also deployed by the first caregiver to move the patient transport apparatus 100 into the stair configuration SC as shown. As shown in the stair configuration SC, the track assemblies 154 are arranged in the deployed position 154B. Here, the rear wheels 152 are positioned significantly closer to the front wheels 122 compared to operation in the chair configuration CC, and are also arranged further under the seat section 104. It will be appreciated that transitioning the patient transport apparatus 100 from the chair configuration CC to the stair configuration SC has resulted in minimal patient movement relative to the support structure 102 as the carrier assembly 148 pivots about the hub axis HA and moves the rear wheels 152 closer to the front wheels 122 in response to movement of the track assemblies 154 to the deployed position 154B.

[0092] Furthermore, while the arrangement of the patient’s center of gravity has not changed significantly relative to the support structure 102, the longitudinal distance which extends between the patient’s center of gravity and the location at which the rear wheels 152 contact the floor surface FS has shortened considerably. Because of this, the process of “tilting” the patient transport apparatus 100 (e.g., about the rear wheels 152) to transition toward contact between the track assemblies 154 and the stairs ST, as depicted in Figure 12C, is significantly more comfortable for the patient than would otherwise be the case if the patient transport apparatus 100 were “tilted” about the rear wheels 152 from the chair configuration CC (e.g., with the rear wheels 152 positioned further away from the front wheels 122). Put differently, the arrangement depicted inDocket No. 060252.01180Figure 12C is such that the patient is much less likely to feel uncomfortable, unstable, or as if they are “falling backwards” during the “tilting” process. Here too, the caregivers are afforded with similar advantages in handling the patient transport apparatus 100, as the arrangement of the rear wheel 152 described above also makes the “tilting” process easier to control and execute. In Figure 12D, the caregivers are shown continuing to support the patient transport apparatus 100 in the stair configuration SC as the belts 156 of the track assemblies 154 are brought into contact with the edge of the top stair ST.

[0093] In Figures 12E and 12F, the caregivers are shown continuing to support the patient transport apparatus 100 in the stair configuration SC as the belts 156 of the track assemblies 154 contact multiple stairs ST during descent

[0094] The patient transport apparatus 100 is configured to operate in a variety of states and modes in certain versions, including for example in or between one or more inactive states SI and / or one or more active states SA. During the inactive state SI, power consumption of the patient transport apparatus 100 is limited as the motor is not controlling movement of the belt during this state, and during the active state SA the controller 212 may be utilized to control movement of the belt 156 with the motor 188 of the patient transport apparatus 100.

[0095] It will be appreciated that the controller 212 may be configured to operate in a variety of inactive states SI and active states SA. The controller 212 may be configured to operate in (or between) a sleep mode MS of the inactive state SI and an active mode MS of the inactive state SI. The controller 212 may also operate in a variety of inactive states, for example, a low charge mode MLC of the inactive state SI, and / or a battery disconnect mode MBD of the inactive state SI which are discussed in detail in U.S. Patent Publication No. 2021 / 0196539, the disclosure of which is hereby incorporated by reference in its entirety.

[0096] During the sleep mode MS of the inactive state SI, power consumption of the patient transport apparatus 100 is limited. In some versions, power consumption of the patient transport apparatus 100 may be limited by only allowing the controller 212 to provide power from the battery 206 to certain components of the patient transport apparatus 100. For example, during the sleep mode MS, the controller 212 may be unable to generate and transmit control signals to some of the one or more powered devices, or components thereof, to drive the patient transport apparatus 100. Here, however, the controller 212 may be configured to provide power to the user interface 204. In the sleep mode MS, the user interface 204 may be prevented from emitting light, but mayDocket No. 060252.01180be configured to receive input generate by user engagement of any portion of the user interface 204. Additionally, in some instances of the sleep mode MS, one or more of the controller 212, the motor 188, the geartrain 192, and / or the track assemblies 154 may also be configured to “brake” or otherwise prevent movement of the belts 156.

[0097] During active mode MA of the inactive state, the controller 212 may not limit power consumption of any component of the patient transport apparatus 100. For example, the user interface 204 may emit light for a predetermined period of time in response to user engagement of one of the input controls 214, 216, 218, 222, 224, 322, 324, 326, 328, and 334. Various other components of the patient transport apparatus 100 may be provided power upon demand without limitation during the active mode MA of the inactive state SI.

[0098] The controller 212 may be configured to operate in a drive mode MD during the active state SA to control a direction of movement of the belt 156. In some versions, the controller 212 may be configured to additionally operate in additional modes to the drive mode during the active state SA such as a hold mode MH of the active state SA for limiting movement of the belt 156 to facilitate a controlled descent of the patient transport apparatus 100 along stairs ST. The hold mode is disclosed by the discussed in detail in U.S. Patent Publication No. 2021 / 0196539, previously incorporated by reference.

[0099] In some versions, the user interface 204 may comprise one or more light modules 210 realized as backlight modules 336 arranged to illuminate various input controls 214, 216, 218, 222, 224, 322, 324, 326, 328, 334 and / or indicators 220, 330, 332 under certain operating conditions. In some versions, the user interface 204 may comprise one or more light modules 210 configured to, among other things, provide status information to the caregiver.

[0100] In the representative version illustrated herein, the controller 212 may be operable in sleep mode in which power consumption is limited, and the active mode SA in which power consumption is not limited such as when the controller 212 controls movement of the belt 156 with the motor 188 of the patient transport apparatus 100. As previously described, the controller 212 may be configured to operate in a variety of other modes / states not explicitly discussed herewith but discussed in greater detail in U.S. Patent Publication No. 2021 / 0196539, previously incorporated by reference.

[0101] As noted above, the direction input controls 216 may include the first direction input control 322 and the second direction input control 324. Here, the first direction input control 322Docket No. 060252.01180may be configured to select a drive direction of the motor 188 in order to ascend stairs. The second direction input control 324 may be configured to select a drive direction of the motor 188 in order to descend stairs.

[0102] The one or more speed input controls 218 may be configured to select between the plurality of drive speeds DS1, DS2, DS3 of the motor 188. The speed indicator 332 may be disposed adjacent to the one or more speed input controls 218. The speed indicator 332 may be configured to display the selected one of the plurality of drive speeds DS1, DS2, DS3 of the motor 188 to the user.

[0103] The plurality of drive speeds DS1, DS2, DS3 may correspond to predetermined speed settings (a specific RPM setting) stored in memory of the controller 212. The plurality of drive speeds DS 1, DS2, DS3 may include a first drive speed DS 1, a second drive speed DS2, and a third drive speed DS3. The first drive speed DS1 corresponds to the lowest of the plurality of drive speeds DS1, DS2, DS3. The third drive speed DS3 corresponds to the highest drive speed of the plurality of drive speeds DS1, DS2, DS3. The second drive speed DS2 corresponds to a speed in between the first drive speed DS1 and the third drive speed DS3. It will be appreciated that the forgoing are non-limiting, illustrative examples of three discreet drive speeds, and other configurations are contemplated, including without limitation additional and / or fewer drive speeds, drive speeds defined in other ways, and the like.

[0104] As noted above, the one or more speed input controls 218 may include a first speed input control 326 and a second speed input control 328. The controller 212 may be configured to increase the selected speed to the next higher drive speed setting in response to the user engagement of the first speed input control 326. For example, in response to receiving user input generated by user engagement of the first speed input control 326 when the current selected drive speed is the first drive speed DS 1, the controller 212 may set the current speed to the second drive speed DS2. The controller 212 may be configured to decrease the selected drive speed to the next lower drive speed setting in response to user engagement of the second speed input control 328. For example, when the current selected drive speed is the second drive speed DS2, the controller 212 may set the current speed to the first drive speed DS1 in response to user engagement of the second speed input control 328.

[0105] In some versions, the controller 212 may be configured to initially select the first drive speed DS1 of the plurality of drive speeds DS1, DS2, DS3 in response to user engagement of theDocket No. 060252.01180direction input controls 216 following the change in operation from the inactive state SI to the active state SA. However, it is contemplated that the controller 212 may be configured alternatively, such as to initially select the second drive speed DS2 or the third drive speed DS3 of the plurality of drive speeds DS1, DS2, DS3.

[0106] The controller 212 may be configured to selectively permit operation of the motor 188 in response to receiving user input generated by engagement of one of the activation input controls 214 (e.g., the first activation input control 222 or the second activation input control 224). For example, the controller 212 may be configured to permit operation of the motor 188 in response to user engagement of at least one of the activation input controls 214 following user engagement of the direction input control 216 to drive the belt 156 in a selected drive direction. In another example, the controller 212 may be configured to permit operation of the motor 188 in response to user engagement of the activation input controls 214 within a predetermined period following engagement of the direction input control 216. After the predetermined period following user engagement of the direction input control 216 has elapsed, the controller 212 may prevent operation of the motor 188 even when one of the activation input controls 214 is engaged. The controller 212 may also be configured to limit operation of the motor 188 in response to receiving the user input before receiving the user input generated by user selection of one of the direction input controls 216.

[0107] Referring now to Figures 1A-1C and 20-22F, as noted above, the loading device 98 of the system 96 is configured to engage the patient transport apparatus 100 in the stowed configuration FC for loading and unloading onto the transport vehicle VEH. To this end, the loading device 98 generally includes a mount 338, a stage 340, a receiver 342, and a dock 344. In the representative version illustrated throughout the drawings, the loading device 98 also employs a limiter 346, an elevating mechanism 348, and a torque translator 350. Each of the components of the loading device 98 introduced above will be described in greater detail below.

[0108] The system 96 of the present disclosure also includes a monitoring system 352 for communicating information about the loading device 98, the patient transport apparatus 100, and / or other components of the system 96 to one or more caregivers, as described in greater detail below in connection with Figures 20-22F. The monitoring system 352 generally includes a sensing system 354 with one or more sensors S for monitoring components of the system 96 (e.g.. the loading device 98, the patient transport apparatus 100, and the like), an output device 356 arrangedDocket No. 060252.01180remotely from the loading device 98, and a monitor controller 358 in communication with the sensing system 354 and the output device 356 and configured to activate the output device 356 in response to one or more signals SN received from the sensing system 354 satisfying a predetermined condition PC for communicating a status MS of the system 96 (e.g., of the loading device 98 and / or the patient transport apparatus 100) to the caregiver. Each of the components of the monitoring system 352 introduced above will be described in greater detail below.

[0109] With continued reference to Figures 1A-1C, the mount 338 of the loading device 98 is configured for mounting to the transport vehicle VEH as described in greater detail below. The stage 340 is operatively attached to the mount 338, and the receiver 342 is arranged for translational movement relative to the stage 340 between a lowered position 342L (see Figures 1A-1B; see also Figures 2C and 3A) and a raised position 342R (see Figure 1C: see also Figures 2A-2B and 3B-3C).

[0110] The dock 344 is operatively attached to the receiver 342 and is configured for engagement with the support structure 102 of the patient transport apparatus 100. In the illustrated versions, the dock 344 helps support the patient transport apparatus 100 in spaced relation from the ground or floor surface FS during loading and unloading. The torque translator 350 is operatively attached to the receiver 342 adjacent to the dock 344 and is arranged for operative engagement with the track assembly 154 of the patient transport apparatus 100. The limiter 346 is interposed between the stage 340 and the receiver 342 to inhibit movement of the receiver 342 relative to the stage 340 in a plurality of degrees of freedom. As is described in greater detail below, the limiter 346 helps ensure that the receiver 342 remains stable and secure relative to the transport vehicle VEH when the receiver 342 is being moved relative to the stage 340 between the lowered position 342E and the raised position 342R, when the receiver 342 is being moved relative to the transport vehicle VEH in another direction (e.g., as is described in greater detail below in connection with Figures 2A-3C), as well as when the patient transport apparatus 100 is being loaded onto and / or unloaded from the dock 344. The elevating mechanism 348 is operably coupled between the stage 340 and the receiver 342 and includes an actuator interface 360 which, in the representative versions depicted throughout the drawings, is disposed in rotational communication with the torque translator 350 to move the receiver 342 relative to the stage 340 between the lowered position 342E (see Figures 1A-1B) and the raised position 342R (see Figure 1C) with torque generated by the motor 188 of the patient transport apparatus 100 for moving the receiverDocket No. 060252.01180342 and the patient transport apparatus 100 into a secured configuration CS (see Figure 1C; see also Figure 3C) for transit with the transport vehicle VEH. The various components of the loading device 98 introduced above will each be described in greater detail below.

[0111] As shown in Figures 1A-1C, the loading device 98 is operable between the secured configuration CS (see Figure 1C) defined with the receiver 342 arranged in the raised position 342R to facilitate transit of the transport vehicle VEH (with or without the loaded patient transport apparatus 100), and an access configuration CA (see Figures 1A-1B) defined with the receiver 342 arranged in the lowered position 342L to facilitate loading and unloading the patient transport apparatus 100 relative to the dock 344.

[0112] As noted above, the stage 340 of the loading device 98 is operatively attached to the mount 338 which, in turn, facilitates mounting the loading device 98 to the transport vehicle VEH. In some versions, such as the version depicted in Figure 14, the mount 338 may be configured as an angled bracket 362 which is operatively attached to the stage 340 and to a surface within the cargo volume VC or the interior volume VI of the transport vehicle VEH that is arranged at an angle (e.g., 90-degrees) relative to the stage 340. For example, the angled bracket 362 may be attached to a floor surface of the transport vehicle VEH. Those having ordinary skill in the art will appreciate that the mount 338 may be operatively attached to the vehicle VEH and / or to the stage 340 in a number of different ways without departing from the scope of the present disclosure, including without limitation via fasteners such as bolts, nuts, screws, rivets, and the like, as well as in other ways such as by welding. Other configurations are contemplated.

[0113] In some versions, rather than the mount 338 including or otherwise being realized as the angled bracket 362, the mount 338 could instead be configured to facilitate mounting to a surface of the transport vehicle VEH that is arranged generally parallel to the stage 340, such as to facilitate mounting the stage 340 to the door DR of the transport vehicle VEH as described above. In some versions, the stage 340 could include or otherwise define the mount 338, such as with apertures formed through the stage 340 to receive fasteners used to secure the stage 340 to the door DR or another component of the transport vehicle VEH. In some versions, the loading device 98 may include one or more additional components interposed between the transport vehicle VEH and the mount 338 and / or interposed between the mount 338 and the stage 340, including for example different arrangements of brackets, fasteners, actuators, linkages, and the like.Docket No. 060252.01180

[0114] In some versions, such as the version depicted in Figures 2A-3C and Figure 13, the loading device 98 may include a second stage 364 operatively attached to the mount 338, a second receiver 366 supporting the stage 340 and arranged for translational movement relative to the second stage 364 between a retracted position 366R (see Figures 2A and 3C) and an extended position 366E (see Figures 2B-2C, 3A-3B, and 13), and a second limiter 368 (see Figure 13) interposed between the second stage 364 and the second receiver 366 to inhibit movement of the second receiver 366 relative to the second stage 364 in a second plurality of degrees of freedom. As is illustrated by sequentially viewing Figures 2A-3C, the second stage 364 is coupled to the mount 338 in the illustrated version, such as with one or more fasteners (not shown in detail), and supports the stage 340 for concurrent movement with the second receiver 366 relative to the mount 338 between the retracted position 366R (see Figures 2A and 3C) and the extended position 366E (see Figures 2B-2C and 3A-3B). Here too, it will be appreciated that the stage 340 could be coupled to the second receiver 366, either directly or indirectly, in a number of different ways without departing from the scope of the present disclosure.

[0115] In the version depicted in Figures 2A-3C and 13, the limiter 346 is configured to inhibit lateral and longitudinal movement of the receiver 342 relative to the stage 340, and the second limiter 368 is configured to inhibit vertical and longitudinal movement of the second receiver 366 relative to the second stage 364. Put differently, in this version, movement of the receiver 342 relative to the stage 340 between the lowered position 342L (see Figures 2C and 3A) and the raised position 342R (see Figures 2A-2B and 3B-3C) occurs in the vertical direction and the limiter 346 is configured to permit vertical movement of the receiver 342 relative to the stage 340 but to inhibit movement of the receiver 342 relative to the stage 340 in directions transverse to the vertical direction, and movement of the second receiver 366 relative to the second stage 364 between the retracted position 366R (see Figures 2A and 3C) and the extended position 366E (see Figures 2B-2C and 3A-3B) occurs in the horizontal direction (e.g., laterally, longitudinally, or otherwise transverse to the vertical direction) and the second limiter 368 is configured to permit horizontal movement of the second receiver 366 relative to the second stage 364 but to inhibit movement of the second receiver 366 relative to the second stage 364 in directions transverse to the horizontal direction.

[0116] As is best depicted in Figure 13. the limiter 346 includes a linear slide assembly 370 supporting the receiver 342 for sliding movement relative to the stage 340 between the loweredDocket No. 060252.01180position 342L and the raised position 342R. Similarly, the second limiter 368 includes a second linear slide assembly 372 supporting the second receiver 366 for sliding movement relative to the second stage 364 between the retracted position 366R and the extended position 366E. In the representative version illustrated in Figure 13, the linear slide assemblies 370, 372 each include respective pairs of rails 374 which each slidably support a corresponding set of carriages 376 to facilitate sliding movement in a specific direction but to inhibit or otherwise substantially prevent movement in directions transverse to that specific direction. Put differently, the rails 374 and the carriages 376 of the linear slide assembly 370 inhibit movement of the receiver 342 relative to the stage 340 in four degrees of freedom (lateral and longitudinal translation, and lateral and longitudinal rotation), and the rails 374 of the carriages 376 of the second linear slide assembly 372 inhibit movement of the second receiver 366 relative to the second stage 364 in four degrees of freedom (vertical and longitudinal translation, and vertical and longitudinal rotation).

[0117] The rails 374 of the linear slide assembly 370 are operatively attached the stage 340 and each supports a corresponding set of two camages 376 which are operatively attached to the receiver 342, and the rails 374 of the second linear slide assembly 372 are operatively attached to the second stage 364 and each supports a corresponding set of two carriages 376 which are operatively attached to the second receiver 366. In the illustrated versions, fasteners (not shown in detail) are utilized facilitate operative attachment of the linear slide assemblies 370, 372 between the stages 340, 364 and the receivers 342, 366. However, it will be appreciated that other configurations are contemplated, and the linear slide assemblies 370, 372 could be operatively attached to or otherwise formed integrally with various components of the loading device 98.

[0118] Those having ordinary skill in the art will appreciate that the limiters 346, 368 could be configured in various ways to limit movement of their associated receivers 342, 366 relative to the corresponding stages 340, 364. In some versions, the limiters 346, 368 could be configured differently from each other, such as to limit different quantities of degrees of freedom (e.g., with the second limiter 368 configured to permit lateral rotation). In some versions, different quantities of rails 374 and / or carriages 376 could be employed, such as with each limiter 346, 368 utilizing a single rail 374 and / or fewer or more camages 376 for each rail 374. In some versions, the arrangement of the rails 374 and the carriages 376 could be interposed (e.g., with the rails 374 coupled to the receivers 342, 366 rather than to the stages 340, 364). Other configurations are contemplated.Docket No. 060252.01180

[0119] In the version depicted in Figures 2A-3C, the secured configuration CS (see Figures 2A and 3C) is defined with the receiver 342 arranged in the raised position 342R and with the second receiver 366 arranged in the retracted position 366R to facilitate transit of the transport vehicle VEH (with or without the loaded patient transport apparatus 100), and the access configuration CA (see Figures 2C-3A) is defined with the receiver 342 arranged in the lowered position 342L and with the second receiver 366 arranged in the extended position 366E to facilitate loading and unloading the patient transport apparatus 100 relative to the dock 344. Here in this version, loading device 98 is also operable in one or more intermediate configurations CI (see Figures 2B and 3B) between the secured configuration CS and the access configuration CA defined with the receiver 342 arranged in the raised position 342R and with the second receiver 366 arranged in the extended position 366E.

[0120] As shown in Figures 1A-3C, in some versions, the loading device 98 includes a stage lock 378 interposed between the stage 340 and the receiver 342 to selectively inhibit movement of the receiver 342 relative to the stage 340 between the lowered position 342L and the raised position 342R. As shown in Figures 2A-3C, in some versions, the loading device 98 includes a second stage lock 380 interposed between the second stage 364 and the second receiver 366 to selectively inhibit movement of the second receiver 366 relative to the second stage 364 between the retracted position 366R and the extended position 366E.

[0121] In some versions, the stage lock 378 is configured to maintain the receiver 342 in the raised position 342R, such as to prevent inadvertent movement of the receiver 342 relative to the stage 340 until a caregiver selectively engages the stage lock 378 and subsequently moves the receiver 342 to the lowered position 342L. However, it will be appreciated that other configurations are contemplated, and the stage lock 378 could alternatively or additionally be configured to maintain the receiver 342 in the lowered position 342L and / or in one or more intermediate positions (not shown) between the raised position 342R and the lowered position 342R, such as to define multiple adjacent lowered positions 342L of the receiver 342 to allow the caregiver to load or unload the patient transport apparatus 100 at different heights relative to ground or floor surfaces FS. In some versions, the second stage lock 380 is configured to maintain the second receiver 342 in the retracted position 342R, such as to prevent inadvertent movement of the receiver 366 relative to the second stage 364 (e.g.. in scenarios where the transport vehicle VEH is parked on an incline) until a caregiver selectively engages the second stage lock 380 andDocket No. 060252.01180subsequently moves the second receiver 366 to the extended position 366E. However, it will be appreciated that other configurations are contemplated, and the second stage lock 380 could alternatively or additionally be configured to maintain the second receiver 366 in the extended position 366E and / or in one or more intermediate positions (not shown) between the retracted position 366R and the extended position 366E, such as to define multiple adjacent extended positions 366E of the second receiver 366 to allow the caregiver to load or unload the patient transport apparatus 100 at horizontal positions relative to the transport vehicle VEH.

[0122] As shown in Figures 1A-3C, the stage lock 378 and / or the second stage lock 380 may be realized or otherwise include flanges 382 that are operatively attached to corresponding spring-loaded detent plungers (not shown in detail) which, in turn, are coupled to the respective receivers 342, 366 for concurrent movement with the receivers 342, 366 relative to their associated stages 340, 364, whereby one or more apertures (not shown) may be formed in or otherwise defined by the stages 340, 364 that are shaped to receive the detent plungers of the stage locks 378, 380. With this configuration, the detent plungers of the stage locks 378, 380 automatically engage the apertures of the stages 340, 364 and inhibit movement of the receivers 342, 366 until the caregiver selectively engages the flanges 382 of the stage locks 378, 380 to enable movement of the receivers 342, 366. In some versions, the stage locks 378, 380 may be configured to remain biased for engagement with apertures in the stages 340, 364, may be configured to be placed in released states (not shown) to allow free movement of the receivers 342, 366, or may be configured to be placed into a temporary released state (not shown) to allow free movement away from an engaged aperture before becoming biased for engagement with a different aperture. Other configurations are contemplated, and those having ordinary skill in the art will appreciate that the stage locks 378, 380 could be realized in a number of different ways, with different arrangements of components and / or structural features formed on the receivers 342, 366, the stages 340, 364, and / or other components of the loading device 98. In some versions, the loading device 98 may employ electronically-actuated stage locks 378, 380. In some versions, multiple stage locks 378, 380 may be utilized for a single stage 340, 364. In some versions, one of the stages 340, 364 may employ a stage lock 378, 380 while the other stage 340, 364 may omit a stage lock 378, 380. Other configurations are contemplated.

[0123] Referring now to Figures 14-15, as noted above, in the representative versions illustrated throughout the drawings, the torque translator 350 is operatively attached to the receiverDocket No. 060252.01180342 and is configured for engagement with the track assembly 154 of the patient transport apparatus 100 to facilitate operating the elevating mechanism 348 as torque is translated between the motor 188 of the patient transport apparatus 100 and the actuator interface 360 of the elevating mechanism 348. The loading device 98 also includes a second torque translator 384 spaced laterally from the torque translator 350, with each of the torque translators 350, 384 being arranged for operative engagement with a respective one of the pairs of track assemblies 154 of the patient transport apparatus 100. However, it will be appreciated that other configurations are contemplated, and in some versions only a single torque translator 350 may be utilized (e.g., for use with a patient transport apparatus 100 having only a single powered track assembly 154).

[0124] As is best depicted in Figure 15, the loading device 98 includes a pair of translator braces 386 which are operatively attached to the receiver 342 adjacent to the dock 344, such as with one or more fasteners, interlocking mechanical features, welding, and the like. Other configurations are contemplated. The translator braces 386 each support a respective translator bearing 388 which, in turn, cooperate to rotatably support a translator shaft 390. The actuator interface 360 of the elevating mechanism 348 and the torque translators 350, 384 are each coupled to the translator shaft 390 (e.g., via one or more of collars, set screws, keyed engagement, and the like; not shown) and rotate concurrently with the translator shaft 390. In the illustrated version, the loading device 98 also includes an interface brace 392 arranged between the translator braces 386 and operatively attached to the receiver 342. The interface brace 392 provides additional rotational support to the translator shaft 390 adjacent to the actuator interface 360, such as via one or more bushings, bearings, and the like (not shown in detail).

[0125] In the representative versions of the loading device 98 illustrated throughout the drawings, the actuator interface 360 of the elevating mechanism 348 includes a spool member 394 coupled to or otherwise disposed in rotational communication with the torque translators 350, 384. The spool member 394 may be coupled to or otherwise formed as a part of the translator shaft 390, or may be disposed in rotational communication with a geartrain (not shown) which, in turn, is disposed in rotational communication with the translator shaft 390. The spool member 394 supports a flexible tension element 396 which is operably coupled between the actuator interface 360 and the stage 340 such that rotation of the torque translator 350, 384 moves the flexible tension element 396 to shorten an effective length of the flexible tension element 396 between the spool member 394 and the stage 340 for lifting the patient transport apparatus 100 from the loweredDocket No. 060252.01180position 342L (see Figures IB and 3A) to the raised position 342R (see Figures 1C and 3B) with torque generated by the motor 188 of the patient transport apparatus 100. In some versions, the flexible tension element 396 may be a polymer webbing material, such as nylon or polyester. In some versions, the flexible tension element 277 may be implemented in shapes and materials other than a polymer webbing; materials such as polyethylene, ultra-high-molecular-weight (UHMW) polyethylene, steel, and stainless steel may be braided or twisted to form a flat strap or round rope. In some versions, the flexible tension element 396 may be a laminated composite material.

[0126] As is best depicted in Figure 15, one end of the flexible tension element 396 is secured to and wrapped around the spool member 394. Rotation of the torque translators 350, 384 in a first direction R1 coils the flexible tension element 396 around the spool member 394 to move the patient transport apparatus 100 towards the raised position 342R, and rotation of the torque translators 350, 384 in a second direction R2 uncoils the flexible tension element 396 from the spool member 394 to move the patient transport apparatus 100 towards the lowered position 342L. As is depicted schematically in Figure 14, the other end of the flexible tension element 396 is coupled to a strap mount 398 which, in turn, is operatively attached to the stage 340 to support the flexible tension element 396 in tension between the stage 340 and the receiver 342. It will be appreciated that the strap mount 398 may be operatively attached to the stage 340 or may be defined by a portion of the stage 340 in some versions. As is best shown in Figures 15 and 18A, a roller assembly 400 having a roller mount 402 operatively attached to the receiver 342 and rotatably supporting a roller 404 is provided to facilitate routing the flexible tension element 396 between the spool member 394 and the strap mount 398. Here, the flexible tension element 396 extends through guide apertures 406 formed in or otherwise defined by the receiver 342, the dock 344, and the roller mount 402, and is disposed in abutment with the roller 404 to facilitate routing of the flexible tension element 396.

[0127] While the representative versions of the elevating mechanism 348 depicted throughout the drawings utilize the spool member 394 and the flexible tension element 396 to facilitate moving the receiver 342 relative to the stage 340 using torque generated by the motor 188 of the patient transport apparatus 100, it will be appreciated that other configurations are contemplated. By way of illustrative example, the actuator interface 360 could instead utilize an arrangement of gears, shafts, and the like (e.g., a worm and gear arrangement) to convert rotation of the motor 188 intoDocket No. 060252.01180linear movement of the receiver 342 relative to the stage 340. Other configurations are contemplated.

[0128] The dock 344 supports the patient transport apparatus 100 during loading and unloading from the loading device 98 and helps ensure that the torque translator 350 remains in engagement with the track assembly 154 of the patient transport apparatus 100 to facilitate operating the elevating mechanism 348 as torque is translated between the motor 188 of the patient transport apparatus 100 and the actuator interface 360 of the elevating mechanism 348. In the representative versions depicted throughout the drawings, the dock 344 is arranged adjacent to a lower end of the receiver 342 and is shaped and arranged to support the patient transport apparatus 100 at a first location LI (see Figures 18A-19B). Engagement between the dock 344 and the patient transport apparatus 100 occurs in at least one first location LI to provide support to the patient transport apparatus 100 in the vertical direction relative to the receiver 342, whereby the patient transport apparatus 100 is at least partially supported vertically above the ground or floor surface FS (see Figure 1A). However, in some versions, it is contemplated that the dock 344 or another portion of the receiver 342 may be disposed in contact with the ground or floor surface FS during operation in the lowered position 342L. Furthermore, in some versions, engagement between the dock 344 and the patient transport apparatus 100 may occur so as to provide support to the patient transport apparatus 100 in other directions relative to the receiver 342, such as to provide lateral or longitudinal stability. As will be appreciated from the subsequent description below, the dock 344 may be configured or realized in various ways, including as one or more portions of the torque translators 350, 384, and / or as with one or more chocks 408 that are realized as components which are operatively attached to the receiver 342 adjacent to the torque translators 350, 384.

[0129] In the version depicted in Figures 14-15, the dock 344 includes a pair of chocks 408 operatively attached to the receiver 342, with at least one of the chocks 408 providing support to the patient transport apparatus 100 so as to define the first location LI. The chocks 408 are each shaped to receive a respective one of the rear wheels 152 of the patient transport apparatus 100, and are spaced laterally outwardly from the torque translators 350, 384. In this version, each of the chocks 408 includes a lower chock brace 410 and an outer chock brace 412 (see Figure 15). The lower chock braces 410 are shaped and arranged to abut the outer surfaces of the respective rear wheels 152 of the patient transport apparatus 100 to provide vertical support, as well asDocket No. 060252.01180longitudinal support, in the illustrated version (see Figures 18A-18B) during loading and unloading. The outer chock braces 412 are shaped and arranged to abut the lateral surfaces of the respective rear wheels 152 of the patient transport apparatus 100 to provide lateral support in the illustrated version (see Figure 16) during loading and unloading.

[0130] The loading device 98 also includes a retainer 414 to releasably secure the patient transport apparatus 100 to the receiver 342. The retainer 414 includes a retainer body 416 operatively attached to the receiver 342, and a catch 418 which is arranged to support the patient transport apparatus 100 at a second location L2 disposed in spaced relation from the first location LI. To this end, the catch 418 of the retainer 414 is shaped to engage the frame element 147 of the support structure 102 of the patient transport apparatus 100 which extends laterally between the uprights 114. Here, the catch 418 has a hooked profile which helps limit movement of the support structure 102 vertically and longitudinally. It will be appreciated that the catch 418 could be configured in various ways to facilitate engaging or otherwise supporting different portions of the support structure 102 (or other components of the patient transport apparatus 100). In the illustrated versions, the second location L2 is spaced vertically above the first location LI, and the loading device 98 includes an adjuster 420 interposed between the receiver 342 and the retainer body 416 to selectively move the catch 418 relative to the receiver 342 between a retained position 418T (see Figure 18B) to inhibit movement of the patient transport apparatus 100 out of contact with the catch 418 at the second location L2 to prevent unloading of the patient transport apparatus 100 from the receiver 342, and a released position 418L (see Figure 18 A) to permit movement of the patient transport apparatus 100 relative to the catch 418 to facilitate loading and unloading of the patient transport apparatus 100. In the illustrated versions, the adjuster 420 includes one or more slots 422 defined in the receiver 342, and one or more knobs 424 with shafts 426 extending through the one or more slots 422 between the one or more knobs and the retainer body 416. Here, the shafts 426 are disposed in threaded engagement (not shown in detail) with the retainer body 416 such that user engagement of the knobs 424 changes operation of the retainer 414 between the retained position 418T and the released position 418L, whereby tightening the threaded engagement operates the retainer 414 in the retained position 418T to compress the receiver 342 between the knobs 424 and the retainer body 416, and loosening the threaded engagement operates the retainer 414 in the released position 418L allowing the shafts 426 to be moved along the slots 422 to selectively move the catch 418 relative to the first location LI.Docket No. 060252.01180

[0131] In this version, initial loading of the patient transport apparatus 100 during operation of the loading device 98 in the access configuration CA may be achieved from the arrangement depicted in Figure 18A by placing the rear wheels 152 into the chocks 408 with the track assemblies 154 engaged to the torque translators 350, 384, followed by tilting the patient transport apparatus 100 towards the receiver 342, and then selectively engaging the adjuster 420 to move the catch 418 into engagement with the frame element 147 of the patient transport apparatus 100 as depicted in Figure 18B before subsequently tightening the knobs 424.

[0132] While the illustrated version of the retainer 414 employs the threaded engagement of the shafts 426 to the retainer body 416 as the adjuster 420 to facilitate moving the catch 418, it will be appreciated that the retainer 414 and the adjuster 420 may be configured in various ways to facilitate supporting the patient transport apparatus 100 at the second location L2 to retain the patient transport apparatus 100 relative to the receiver 342. By way of example, the adjuster 420 may utilize various arrangements of catches, pins, locks, shafts, and the like, which may engage with different portions of the patient transport apparatus 100 and may be adjusted manually or automatically (e.g., with spring bias, with powered actuators or solenoids, and the like).

[0133] In the representative versions depicted in Figures 13-19B, the torque translators 350, 384 each include a respective traction roller 428 that is rotatably supported by the receiver 342 and is arranged for frictional engagement with a respective one of the movable belts 156 of the track assemblies 154 of the patient transport apparatus 100. The traction rollers 428 are each arranged to directly contact the belts 156 of the track assembly 154 for corresponding movement therewith. Operation of the track assembly 154 in a first direction causes movement of the belts 156, which in turn rotates the traction rollers 428 in the first direction together with the translator shaft 390 and the spool member 394 of the elevating mechanism 348. Likewise, operation of the track assembly 154 in a second direction causes movement of the belts 156, which in turn rotates the traction rollers 428 in the second direction. As is described above, operation of the track assembly 154 is powered by the motor 188, which uses electrical energy stored the battery 206 of the patient transport apparatus 100 to create torque capable of rotating the drive pulley 174 to move the belts 156. When engaged with the traction rollers 428, this powered operation of the track assembly 154 is used to lift and lower the receiver 342 of the loading device 98, and in turn the patient transport apparatus 100. Put differently, the motor 188 and the track assembly 154 are utilized in cooperation with loading device 98 to effect powered loading of the patient transport apparatusDocket No. 060252.01180100 into the transport vehicle by moving the patient transport apparatus 100 with the receiver 342 between the lowered position 342L and the raised position 342R.

[0134] In some versions, an outer surface of the traction rollers 428 may include ridges or other features (not shown) that facilitate frictional engagement between the traction rollers 428 and the belts 156 of the track assemblies 154. The ridges may be formed from a rubber material that has been molded onto the outer surface of the traction rollers 428 or may be attached by compression. Other materials and shapes of the ridges are also contemplated. In some versions, the traction rollers 428 may be manufactured from rubber or another material that promotes frictional engagement with the belts 156. Other configurations are contemplated.

[0135] As noted above, engagement between the dock 344 and the patient transport apparatus 100 occurs in at least one first location LI to provide support to the patient transport apparatus 100 in the vertical direction relative to the receiver 342, as well as in other directions (e.g., lateral and longitudinal), and the dock 344 may be realized as one or more portions of the torque translators 350, 384 in some versions. Put differently, in some versions, the torque translators 350, 384 define all or at least a portion of the dock 344 to facilitate supporting the patient transport apparatus 100 at the first location LI in the vertical direction or in multiple directions including the vertical direction.

[0136] While the illustrated versions of the elevating mechanism 348 employ the torque translators 350 with traction rollers 428 to engage the belts 156 of the track assemblies 154 of the patient transport apparatus, as will be appreciated from the subsequent description of the monitoring system 352 below, the elevating mechanism 348 could be of various types, styles, and / or configurations, and may not necessarily utilize torque generated by the motor 188 of the patient transport apparatus 100 to facilitate moving the receiver 342 between the lowered position 342L and the raised position 342R. By way of illustrative example, the elevating mechanism 348 could instead employ one or more powered actuators (e.g., electric or hydraulicly powered linear or rotary actuators), or could be configured for non-powered operation (e.g., with one or more gas struts, springs, linkages, and the like). Thus, non-powered patient transport apparatuses 100, and / or other types of medical devices or equipment, could be monitored with the monitoring system 352. Moreover, it is contemplated that the loading device 98 could be configured without necessitating vertical movement of the receiver 342 relative to the stage 340 in the way that is illustrated throughout the drawings. For example, the stage 340 could be defined by one part ofDocket No. 060252.01180the transport vehicle VEH, and the receiver 342 could be defined by the door DR of the transport vehicle VEH, whereby opening and closing motion of the door DR defines movement of the receiver 342 relative to the stage 340. As will be appreciated from the subsequent description below, in some versions, aspects of the monitoring system 352 may be implemented without requiring the use of the receiver 342 and / or the stage 340, such as with the dock 344 secured directly to a portion of the transport vehicle VEH. Other configurations are contemplated.

[0137] Referring now to Figures 20-22F, as noted above, the monitoring system 352 is configured to facilitate communicating information about the loading device 98, the patient transport apparatus 100, and / or other components of the system 96 to one or more caregivers via the output device 356. In the representative versions illustrated herein, the monitoring system 352 includes one or more output devices 356 which form part of a monitor interface 430 that is arranged or otherwise located remotely from the loading device 98 to communicate information to the caregiver about the status MS of the loading device 98, the patient transport apparatus 100, or other components of the system 96. In some versions, the monitor interface 430 may also include one or more input devices 432 (see Figures 22A-22F) to receive inputs from the caregiver at the remotely-located monitor interface 430, as described in greater detail below.

[0138] In the representative versions depicted in Figures 22A-22F, the output device 356 (and / or other components of the monitor interface 430) is arranged within a driver compartment AB of the transport vehicle VEH. Here, the driver compartment AB is remotely located from both the first storage compartment RSI defining the first cargo volume VC1 (see Figures 1A-1C) and the second storage compartment RS2 defining the second cargo volume VC2 (see Figures 2A-3C). Put differently, because the loading device 98 is not accessible or visible to a caregiver positioned within the driver compartment AB, the remotely arranged configuration of the output device 356 allows information about the status MS of the loading device 98 and / or the patient transport apparatus 100 to be communicated remotely to the caregiver positioned within the driver compartment AB. As will be appreciated from the subsequent description below, this configuration affords significant advantages in connection with usability of the system 96 by, among other things, helping the caregiver save time by providing status MS information without requiring manual checks before operating the transport vehicle VEH, help prevent scenarios where the patient transport apparatus 100 is inadvertently left at an incident scene (e.g., after unloading without subsequently reloading), and to help prevent inadvertent damage to the transport vehicleDocket No. 060252.01180VEH, the patient transport apparatus 100, and / or the loading device 98 that might otherwise be caused by driving the transport vehicle VEH while the loading device 98 and / or patient transport apparatus 100 are improperly secured. Here, for example, in some versions the output device 356 may be configured to communicate to the caregiver located within the driver compartment AB that the loading device 98 and / or the patient transport apparatus 100 is not secured for transit with the transport vehicle VEH. In some versions, the output device 356 may be configured to communicate to the caregiver located within the driver compartment AB that the receiver 342 is arranged in the lowered position 342L.

[0139] It will be appreciated that the forgoing example is illustrative of one way in which the monitoring system 352 can communicate status MS information to caregivers located remotely from the loading device 98. In some versions, the monitoring system 352 may include output devices 356 and / or input devices 432 disposed in multiple remote locations about the transport vehicle VEH, each of which may be configured to communicate the same status MS information and / or to communicate different status MS information various locations about the transport vehicle VEH. For example, one output device 356 located within the driver compartment AB may be configured to communicate the charge status MS of the battery 206 of the patient transport apparatus 100 so that the caregiver can readily determine that the patient transport apparatus 100 has sufficient charge for use, and another output device 356 located within the interior volume VI of the transport vehicle VEH (e.g., adjacent to the loading device) may be configured to communicate the loading status MS of the patient transport apparatus 100 onto the dock 344 of the loading device 98 to alert the caregiver to misalignment of the patient transport apparatus 100 relative to the dock 344. For example, and as is depicted schematically in Figures 20-21, in some versions, an output device 356 arranged adjacent to, on, or otherwise in close proximity to the loading device 98 may be provided to facilitate communicating the same information, alerts, alarms, and the like to caregivers, or may communicate partial subsets of the information, alerts, alarms, and the like, or even different information, alerts, alarms, and the like. More specifically, it contemplated that one or more local output devices 356L may be utilized to communicate information about the charging status of the battery 206, the charge state of the battery 206, the alignment of the patient transport apparatus 100 relative to the loading device 98, and the like. Other configurations are contemplated.Docket No. 060252.01180

[0140] Referring now to Figures 22A-22F, in some versions, the output device 356 may include one or more light emitting diodes 434 to communicate the status MS of the loading device 98 and / or the patient transport apparatus 100. In some versions, the output device 356 may include one or more display screens 436 to communicate the status MS of the loading device 98 and / or the patient transport apparatus 100. In some versions, the output device 356 may include one or more audible indicators 438 (e.g.. speakers, buzzers, alarms, and the like) to communicate the status MS of the loading device 98 and / or the patient transport apparatus 100. Other configurations are contemplated, and the output device 356 may be configured to generate audible, visual, haptic, and / or other types of alerts or otherwise communicate information to the caregiver.

[0141] In some versions, the output device 356 is operable between a first output mode 356A and a second output mode 356B different from the first output mode 356A, where the change between the output modes 356A, 356B can help communicate the status MS information to the caregiver, whereby the monitor controller 358 is configured to change operation of the output device 356 from the first output mode 356A to the second output mode 356B in response to the one or more signals SN received from the sensing system 354 satisfying the predetermined condition PC, as described in greater detail below.

[0142] In versions where the output device 356 includes a light emitting diode 434, operation in the first output mode 356A may be defined as an absence of light emission by the light emitting diode 434 (see Figure 22A), and operation in the second output mode 356B may be defined as emission of light by the light emitting diode 434 (see Figure 22C; compare with Figure 22A). Thus, a change from the absence of light emission to the emission of light by the light emitting diode 434 communicates the status MS to the caregiver. In some versions, operation of the light emitting diode 434 in the first output mode 356A may be defined as emission of light in a first color (see Figure 22B), and operation in the second output mode 356B may be defined as emission of light in a second color, different from the first color (see Figure 22C; compare with Figure 22B). Thus, changes in the color of light emitted by the light emitting diode 434 communicates the status MS to the caregiver. It will be appreciated that the monitor controller 358 may be configured to operate one or more light emitting diodes 434 in numerous ways to communicate the status MS to the caregiver, including without limitation by pulsing, blinking, changing colors, and / or otherwise interrupting or beginning light emission, or combinations thereof. Other configurations are contemplated.Docket No. 060252.01180

[0143] In versions where the output device 356 includes a display screen 436, operation in the first output mode 356A may be defined as an absence of visual content VN that includes an alert message on the display screen 436 (see Figure 22C), and operation in the second output mode 356B may be defined as presentation of visual content VN including an alert message on the display screen (see Figure 22D; compare with Figure 22C). It will be appreciated that different visual content VN may be presented on the display screen 436 to communicate the status MS to the caregiver, including without limitation colors, symbols, text, animations, video, messages, and the like. In some versions, other information may be presented as visual content VN on the display screen 436 to facilitate operation of the system 96, such as is described in greater detail below in connection with Figures 22E-22F.

[0144] In versions where the output device 356 includes an audible indicator 438, operation in the first mode 356A may be defined as an absence of an alarm generated by the audible indicator 438 (see Figure 22A), and operation in the second output mode 356B may be defined as generating an alarm with the audible indicator 438 (see Figure 22B; compare with Figure 22A). In some versions, the intensity and / or type of alarm may vary depending on the status MS (compare Figures 22B-22C). It will be appreciated that different types of audible alarms may be generated, including for example via buzzers, speakers, or other devices that generate discrete, repeating, or specific alerts, alarms, messages, and the like.

[0145] The input device 432 of the monitor interface 430 may include or otherwise be realized with various types of devices capable of being actuated by the caregiver and may be configured to be actuated in a variety of different ways, including but not limited to mechanical actuation (hand, foot, finger, etc.), hands-free actuation (voice, foot, etc.), and the like. The input devices 432 may include one or more of a load cell, a push button, a touch screen, a joystick, a twistable control handle, a dial, a knob, a gesture sensing device for monitoring motion of hands, feet, face, or other body parts of the user (such as through a camera), a microphone for receiving voice activation commands, a foot pedal, and a sensor (e.g., infrared sensor such as a light bar or light beam to sense a user’s body part, ultrasonic sensor, etc.). Additionally, buttons / pedals may be physical buttons / pedals, or may be virtually-implemented buttons / pedals such as through optical projection or forming part of a graphical user interface presented as visual content VN on the display screen 436. Other configurations are contemplated.Docket No. 060252.01180

[0146] Referring now to Figures 20-21, as noted above, the monitoring system 352 employs the sensing system 354 for monitoring components of the system 96 (e.g., the loading device 98, the patient transport apparatus 100, and the like), and the monitor controller 358 is configured to activate the output device 356 in response to one or more signals SN received from the sensing system 354 satisfying the predetermined condition PC for communicating the status MS of the system 96 (e.g.. of the loading device 98 and / or the patient transport apparatus 100) to the caregiver. The monitor controller 358 is depicted schematically in Figures 20-21. It will be appreciated that the monitor controller 358 can be configured or otherwise arranged in a number of different ways. The monitor controller 358 may have one or more microprocessors for processing instructions or for processing an algorithm stored in memory to control operation of the output device 356. generation or interpretation of signals received from the input device 432, interpretation of signals SN generated by sensors S of the sensing system 354, and the like. Additionally or alternatively, the monitor controller 358 may include one or more microcontrollers, field programmable gate arrays, systems on a chip, discrete circuitry, relays, and / or other suitable hardware, software, and / or firmware that is capable of carrying out the various functions and operations described herein. The monitor controller 358 may be carried onboard the loading device 98, may be remotely located (e.g., with the output device 356) or otherwise secured to some other portion of the system 96 or to the transport vehicle VEH. The monitor controller 358 may include one or more subcontrollers configured to control or otherwise communicate with multiple components of the system 96, or may be realized with one or more subcontrollers for separate components of the system 96. The monitor controller 358 may communicate with the sensors S of the sensing system 354, the output device 356, the input device 432, or other components of the monitor interface 430 and / or of the system 96 via wired or wireless communication according to any suitable protocol or configuration.

[0147] The sensing system 354 may include or otherwise define one or more sensors S, including force sensors (e.g., load cells), timers, switches, optical sensors, electromagnetic sensors, motion sensors, accelerometers, potentiometers, infrared sensors, ultrasonic sensors, mechanical limit switches, membrane switches, encoders, and / or cameras. Other types of sensors S are also contemplated. The sensing system 354 may include one or more sensors S to detect mechanical, electrical, and / or electromagnetic coupling between components of the patient transport apparatus 100, between components of the loading device 98, and / or between the patient transport apparatusDocket No. 060252.01180100 and the loading device 98. Some of the sensors S may monitor thresholds movement relative to discrete reference points. The sensors S can be located anywhere on the loading device 98, the transport vehicle VEH, and / or the patient transport apparatus 100.

[0148] With continued reference to Figures 20-21, in some versions, the monitoring system 352, the loading device 98, or another portion of the system 96 includes a charger 440 for charging the battery 206 of the patient transport apparatus 100 with power from a power source 442. In the illustrated version, the power source 442 is realized such as with a rechargeable battery of the transport vehicle VEH which, in turn, is charged via an internal combustion engine alternator, a mains power supply, and the like (not shown). The power source 442 is utilized to facilitate operation of the charger 440 as well as the monitor controller 358 and the output device 356 (and / or other components of the system 96, such as the sensing system 354). However, it will be appreciated that different power sources 442 could be provided to facilitate operation of the charger 440, the monitor controller 358, the output device 356, and the like.

[0149] In order to facilitate charging the battery 206 of the patient transport apparatus 100 with power from the power source 442, as is best depicted in Figure 20, the patient transport apparatus 100 includes an apparatus interface 444 disposed in electrical communication with one or more of the battery 206, the motor 188, and the controller 212, and the loading device 98 includes a device interface 446 arranged for electrical communication with the apparatus interface 444 to charge the battery 206 with power from the power source 442 when the patient transport apparatus 100 is secured to the dock 344 of the loading device 98 in the secured configuration CS (see Figure 21).

[0150] In the illustrated version, the apparatus interface 444 includes a plurality of apparatus power terminals 448, and the device interface 446 includes a plurality of device power terminals 450 which are each arranged to abut a respective one of the plurality of apparatus power terminals 448 (compare Figures 20-21) when the patient transport apparatus 100 is supported by the dock 344 of the loading device 98 in the secured configuration CS to charge the battery 206 with power from the power source 442 via the charger 440. In some versions, the apparatus interface 444 may include one or more apparatus data terminals 452, and the device interface 446 may include one or more device data terminals 454 arranged to abut the one or more apparatus data terminals 452 to facilitate exchanging data between the controller 212 of the patient transport apparatus 100 and the monitor controller 358 of the monitoring system 352.Docket No. 060252.01180

[0151] In some versions, the apparatus interface 444 includes an apparatus power coil 456, and the device interface 446 includes a device power coil 458 arranged to transfer power with the apparatus power coil 456 when the patient transport apparatus 100 is supported by the dock 344 of the loading device 98 in the secured configuration CS to charge the battery 206 with power from the power source 442 via the charger 440.

[0152] In the illustrated version, the apparatus interface 444 is schematically depicted as being operatively attached to the support structure 102 of the patient transport apparatus 100, and the device interface 446 is schematically depicted as being operatively attached to the receiver 342 adjacent to the dock 344. Those having ordinary skill in the art will appreciate that the apparatus interface 444 and / or the device interface 446 may be of various types, styles, arrangements, and / or configurations to facilitate physical electrical connections (e.g., electrical terminals which physically contact), wireless electrical connections (e.g., wireless power transfer), and the like in order to facilitate power transfer, facilitate electrical communication, or combinations thereof. Furthermore, while not depicted in detail herein, the apparatus interface 444 and the device interface 446 may form a part of or otherwise include interlocking components configured to secure different components together physically. Other configurations are contemplated. In some versions, aspects of the apparatus interface 444 and / or the device interface 446 may be similar to as disclosed in U.S. Patent No. 7,887,113 entitled "Powered Patient Support And Fastening System With Inductive Based Power System” and / or as disclosed in U.S. Patent Application Publication No. US 2024 / 0269024 Al entitled ‘’’’Patient Support Systems With Power Transfer Architecture ” the disclosures of which are each hereby incorporated by reference in their entirety. However, other configurations are contemplated.

[0153] The sensing system 354 may include a charger sensor 460 to determine operation of the charger 440 relative to the battery 206 of the patient transport apparatus 100. The charger sensor 460 may be realized in a number of different ways to determine operation of the charger 440, including without limitation using discrete circuitry to measure voltage, current, continuity, impedance, resistance, and the like of the battery 206 and / or the charger 440, or by using sensors which can detect changes in temperature or other parameters which occur during charging. Here, the predetermined condition PC to be satisfied may be defined by the charger sensor 460 generating signals SN indicating that the charger 440 is not providing power to the battery 206 of the patient transport apparatus 100, and the output device 356 may be configured to communicateDocket No. 060252.01180to the caregiver that the battery 206 of the patient transport apparatus 100 is not charging as the status MS. To this end, the light emitting diode 434 could be activated to emit red or another color of light, a “not charging” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. Other configurations are contemplated.

[0154] In some versions, the sensing system 354 may include a battery sensor 462 to determine a presence of the battery 206 of the patient transport apparatus 100 and / or a charge state of the battery 206. The battery sensor 462 may be separate from the charger sensor 460 or may be formed as a part of the charger sensor 460. The battery sensor 462 may be realized by the battery 206 or another portion of the patient transport apparatus 100 in some versions. The battery sensor 462 may be realized in a number of different ways to determine the presence and / or charge state of the battery 206, including without limitation using discrete circuitry to measure voltage, current, continuity, impedance, resistance, and the like of the battery 206 and / or the charger 440 during charging, and / or with one or more optical sensors, contact sensors, limit switches, and the like on the patient transport apparatus 100 and / or on the loading device 98 (e.g., arranged to determine presence or absence of the battery 206). In some versions, the predetermined condition PC to be satisfied may be defined by the battery sensor 462 generating signals SN which indicate that the battery 206 is absent (e.g., not secured to the patient transport apparatus 100), and the output device 356 may be configured to communicate to the caregiver that the battery 206 of the patient transport apparatus 100 is absent as the status MS. To this end, the light emitting diode 434 could be activated to emit red or another color of light, a “battery missing” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. Other configurations are contemplated.

[0155] The predetermined condition PC to be satisfied may be defined by the battery sensor 462 generating signals SN which indicate that the charge state of the battery 206 of the patient transport apparatus 100 is depleted below some predetermined charge threshold (e.g., less than 50% state of charge), and the output device 356 may be configured to communicate to the caregiver that the battery 206 of the patient transport apparatus 100 is depleted as the status MS. To this end, the light emitting diode 434 could be activated to emit red or another color of light, a “low battery” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. OtherDocket No. 060252.01180configurations are contemplated. In some versions, rather than being based around a predetermined charge threshold, the presence of the battery 206 could serve as the predetermined condition PC and the output device 356 may be configured to communicate the charge state of the battery 206, when present, as the status MS. To this end, a plurality of light emitting diodes 434 (e.g., arranged in an array or as one or more segmented numerals) could be activated to communicate the actual or relative charge state and / or a message with the charge state could be presented as visual content VN on the display screen 436. Other configurations are contemplated.

[0156] As is depicted schematically in Figures 20-21, the sensing system 354 may include a dock sensor 464 operatively attached to the loading device 98 and configured to determine a presence of the patient transport apparatus 100 at the dock 344. In some versions, the dock sensor 464 is configured to determine the presence and / or alignment of the rear wheels 152 of the patient transport apparatus 100 relative to the chocks 408 of the dock 344. The dock sensor 464 may be realized in a number of different ways to determine the presence of the patient transport apparatus 100 at the dock 344 and / or to determine alignment of the rear wheels 152 relative to the chocks 408, including without limitation with one or more optical sensors, contact sensors, limit switches, and the like on the patient transport apparatus 100 and / or on the loading device 98. For example, the dock sensor 464 may include one or more sensors S disposed on the dock 344 adjacent to the chocks 408 and arranged to sense presence or contact of the rear wheels 152 or another portion of the patient transport apparatus 100. Here, the predetermined condition PC to be satisfied may be defined by the dock sensor 464 generating signals SN indicating an absence of the patient transport apparatus 100 at the dock 344, and the output device 356 may be configured to communicate to the caregiver that the patient transport apparatus 100 is not present at the dock 344 as the status MS. To this end, the light emitting diode 434 could be activated to emit red or another color of light, a “not loaded” or “chair missing” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. Other configurations are contemplated. In some versions, the predetermined condition PC to be satisfied may be defined by the dock sensor 464 generating signals SN indicating misalignment of the rear wheels 52 of the patient transport apparatus 100 relative to the chocks 408 of the dock 344, and the output device 356 may be configured to communicate to the caregiver that the patient transport apparatus 100 is not correctly aligned with the dock 344 as the status MS. To this end, the light emitting diode 434 could be activated to emitDocket No. 060252.01180red or another color of light, a “misaligned” or “check chair” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. Other configurations are contemplated.

[0157] The sensing system 354 may include a retainer sensor 466 operatively attached to the retainer 414 and configured to determine an arrangement of the catch 418 between the retained position 418T (see Figure 18B) and the released position 418L (see Figure 18A). The retainer sensor 466 may be realized in a number of different ways to determine the arrangement of the catch 418, including without limitation with one or more optical sensors, contact sensors, limit switches, hall-effect sensors, potentiometers, encoders, and the like on the patient transport apparatus 100 and / or on the loading device 98. For example, the retainer sensor 466 may include one or more sensors S disposed on the retainer 414 adjacent to the catch 418 and arranged to sense presence or contact of the frame element 147 of the support structure 102 or another portion of the patient transport apparatus 100. Here, the predetermined condition PC to be satisfied may be defined by the retainer sensor 466 generating signals SN indicating that the catch 418 is not arranged in the retained position 418T, and the output device 356 may be configured to communicate to the caregiver that the catch 418 is not secured properly (e.g., not arranged in the retained position 418T) as the status MS. To this end, the light emitting diode 434 could be activated to emit red or another color of light, a “chair not secured” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. Other configurations are contemplated.

[0158] In some versions, the sensing system 354 may include a receiver sensor 468 operatively attached to the loading device 98 and configured to determine an arrangement of the receiver 342 relative to the stage 340 between the lowered position 342L (see Figures IB and 3 A) and the raised position 342R (see Figures 1C and 3B), and / or a second receiver sensor 470 operatively attached to the loading device 98 and configured to determine an arrangement of the second receiver 366 relative to the second stage 364 between the retracted position 366R (see Figures 2A and 3C) and the extended position 366E (see Figures 2B-2C and 3A-3B). The receiver sensor 468 and / or the second receiver sensor 470 may be realized in a number of different ways to determine the respective arrangements of the receiver 342 and the second receiver 366, including without limitation with one or more optical sensors, contact sensors, limit switches, hall-effect sensors, potentiometers, encoders, and the like on the patient transport apparatus 100 and / or on the loadingDocket No. 060252.01180device 98. For example, the receiver sensor 468 and / or the second receiver sensor 470 may include one or more sensors S disposed on the receiver 342, 366 adjacent to the respective stage 340, 364 (or vice-versa) to determine the presence of the receiver 342, 366 at one or more discrete positions (e.g., the raised position 342R, the lowered position 342L, the retracted position 366R, the extended position 366E, and the like) or at arbitrary “real-time” positions along their range of motion (e.g., absolute position sensing). As noted above, in some versions, the output device 356 may be configured to communicate to the caregiver located within the driver compartment AB that the receiver 342 is arranged in the lowered position 342L. Here, the predetermined condition PC to be satisfied may be defined by the receiver sensor 468 generating signals SN indicating that the receiver 342 is not arranged in the raised position 342R and / or defined by the second receiver sensor 470 generating signals SN indicating that the second receiver 366 is not arranged in the retracted position 366R, and the output device 356 may be configured to communicate to the caregiver that one or more of the receivers 342, 366 are not arranged for vehicle transport (e.g., not in the raised position 342R and / or not in the retracted position 366R) as the status MS. To this end, the light emitting diode 434 could be activated to emit red or another color of light, a “retainer not secured” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. Other configurations are contemplated.

[0159] In some versions, the monitoring system 352 may include or be disposed in communication with one or more sensors S associated with the transport vehicle VEH, such as via wired or wireless electrical communication with an engine controller of the vehicle VEH (e.g., via one or more diagnostics ports, in communication with a vehicle CAN network, and the like). In some versions, vehicle VEH sensors S may generate signals SN which indicate imminent movement of the vehicle VEH. By way of non-limiting example, the monitoring system 352 may interpret or receive signals SN generated by vehicle VEH sensors S which indicate one or more of: starting of an engine of the vehicle VEH, shifting of a transmission of the vehicle VEH, disengagement of a brake of the vehicle VEH, actuation of a throttle of the vehicle VEH, and the like. Other configurations are contemplated. In some versions, the monitoring system 352, the sensing system 354, or another component of the system 96 may include one or more types of inertial sensors S operatively attached to the vehicle VEH to determine movement, acceleration, and the like (e.g., via one or more types of accelerometers, gyroscopes, or similar inertial or motionDocket No. 060252.01180sensors). Other configurations are contemplated. In some versions, in response to detecting actual or imminent movement of the vehicle VEH in scenarios where the receiver 342 is disposed in the lowered position 342L, the monitor controller 358 (or another component of the system 96, such as the controller 212) may be configured to generate signals SN that are communicated to the loading device 98 (and / or to the patient transport apparatus 100) to facilitate quickly raising the receiver 342 from the lowered position 342L to the raised position 342R (e.g.. by driving the motor 188 of the patient transport apparatus 100) in order to help prevent damage to the loading device 98, the patient transport apparatus 100, or other components of the system 96. Put differently, in some versions, the monitor controller 358 is disposed in communication with the motor 188 of the patient transport apparatus 100 and, in response to one or more signals SN received from the sensing system 354 satisfying the predetermined condition PC (e.g., vehicle VEH movement occurring during operation in the lowered position 342L), the monitor controller 358 is configured to effect operation of the elevating mechanism 348 to move the receiver 342 relative to the stage 340 from the lowered position 342L to the raised position 342R with torque generated by the motor 188 of the patient transport apparatus 100. Other configurations are contemplated.

[0160] The sensing system 354 may include a stage sensor 472 operatively attached to the stage lock 378 and configured to determine changes in engagement of the stage lock 378, and / or a second stage sensor 474 operatively attached to the second stage lock 380 and configured to determine changes in engagement of the second stage lock 380. The stage sensor 472 and / or the second stage sensor 474 may be realized in a number of different ways to determine respective changes in engagement of the stage lock 378 and the second stage lock 380, including without limitation with one or more optical sensors, contact sensors, limit switches, hall-effect sensors, potentiometers, encoders, and the like. For example, the stage sensor 472 and / or the second stage sensor 474 may include one or more sensors S disposed on the stage lock 378, 380 or the receiver 342, 366 adjacent to the respective stage 340. 364 (or vice-versa) to determine changes in engagement of the stage lock 378, 380. Here, the predetermined condition PC to be satisfied may be defined by the stage sensor 472 generating signals SN indicating that the stage lock 378 is disengaged and / or defined by the second stage sensor 474 generating signals SN indicating that the second stage lock 380 is disengaged, and the output device 356 may be configured to communicate to the caregiver that one or more of the stage locks 378, 380 are disengaged as the status MS. To this end, the light emitting diode 434 could be activated to emit red or another colorDocket No. 060252.01180of light, a “stage lock disengaged” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. Other configurations are contemplated.

[0161] The sensing system 354 may include a door sensor 476 operatively attached to the transport vehicle VEH on or adjacent to the door DR and configured to determine an arrangement of the door DR of the transport vehicle VEH. The door sensor 476 may be realized in a number of different ways to determine the arrangement of the door DR, including without limitation with one or more optical sensors, contact sensors, limit switches, hall-effect sensors, potentiometers, encoders, and the like. For example, the door sensor 476 may include one or more sensors S disposed on the door DR or on the transport vehicle VEH adjacent to the door FR to determine changes in the arrangement of the door DR, such as between opened (see Figures 1A-1C) and closed (see Figure ID). Here, the predetermined condition PC to be satisfied may be defined by the door sensor 476 generating signals SN indicating that the door DR of the transport vehicle VEH is not closed, and the output device 356 may be configured to communicate to the caregiver that the door DR is opened as the status MS. To this end, the light emitting diode 434 could be activated to emit red or another color of light, a “door open” message could be presented as visual content VN on the display screen 436, and / or a noise or alarm could be generated with the audible indicator 438 to communicate the status MS. Other configurations are contemplated.

[0162] It will be appreciated that, in some scenarios, the caregiver may want to temporarily deactivate the output device 356. For example, where the output device 356 employs the audible indicator 438 to generate an alarm, alert, or similar noise to communicate that the loading device 98 and / or patient transport apparatus 100 are not secured for transit with the transport vehicle VEH, the caregiver may find the noise (or other alarm generation such as bright light emitted by light emitting diodes 434) distracting or annoying, such as when repositioning the transport vehicle at an incident scene while the unloaded patient transport apparatus 100 is being used to transport a patient down stairs. Here, the caregiver can acknowledge the absence of the patient transport apparatus 100 (or some other communicated status MS) and silence the alarm via an override input control 478 arranged for selective user engagement by the caregiver (e.g., disposed adjacent to the output device 356; see Figures 22A-22F). The monitor controller 358 is configured to silence the alarm generated by the audible indicator 438 (or another output device 356) in response to user engagement with the override input control 478. In some versions, the monitor controller 358 mayDocket No. 060252.01180be configured to re-initialize the alarm after a predetermined period of time and / or in response to changes in status MS of various components of the system 96 determined via the sensing system 354. By way of illustrative example, the audible indicator 438 (or another output device 356) could be re-activated in response to the door DR opening or closing as determined with the door sensor 476. Other configurations are contemplated.

[0163] In some versions, the monitoring system 352 includes a vehicle interlock 480 disposed in communication with the monitor controller 358 for selectively inhibiting transit of the transport vehicle VEH. Here, the vehicle interlock 480 may be disposed in electrical communication with an engine controller of the vehicle VEH so as to stop the engine and thereby prevent propulsion of the vehicle VEH when the vehicle interlock 480 is selectively activated. The monitor controller 358 is configured to activate the vehicle interlock 480 in response to one or more signals received from the sensing system 354 satisfying the predetermined condition PC defined as indicating that the loading device 98 and / or the patient transport apparatus 100 are not secured for transit with the transport vehicle VEH, such as may occur when the door DR is open as determined with the door sensor 476, when the stage sensors 472, 474 indicate that the stage locks 378, 380 are disengaged, when the receiver sensors 468, 470 indicate that the receivers 342, 366 are incorrectly positioned, and the like. While other scenarios are contemplated, it will be appreciated that motion of the vehicle VEH is undesirable when the loading device 98 is not properly secured (e.g., extended and lowered towards ground or floor surface FS with the door DR open), and activation of the vehicle interlock 480 affords improved safety and helps prevent unintended damage. Nevertheless, in some versions, the monitor controller 358 may be configured to deactivate the vehicle interlock 480 in response to user engagement by the caregiver with the override input control 478, such as when the caregiver acknowledges the status MS of the loading device 98 but nevertheless needs to move the vehicle VEH (e.g., in an emergency situation). Other configurations are contemplated.

[0164] Several instances have been discussed in the foregoing description. However, the aspects discussed herein are not intended to be exhaustive or limit the disclosure to any particular form. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the disclosure. The terminology that has been used is intended to be in the nature of words of description rather than of limitation. Many modifications and variations are possible inDocket No. 060252.01180light of the above teachings and the disclosure may be practiced otherwise than as specifically described.

[0165] The present disclosure also comprises the following clauses, with specific features laid out in dependent clauses, that may specifically be implemented as described in greater detail with reference to the configurations and drawings above.CLAUSESI. A system for use with a transport vehicle, the system comprising:a patient transport apparatus including:a support structure having a seat section and being movable between a stowed configuration and one or more patient transport configurations,a track assembly operatively attached to the support structure and including a movable belt for engaging stairs in one of the one or more patient transport configurations, a loading device configured to engage the patient transport apparatus in the stowed configuration for loading and unloading from the transport vehicle, the loading device including:a mount configured for mounting to the transport vehicle,a stage operatively attached to the mount,a receiver arranged for movement relative to the stage between a lowered position and a raised position, anda dock operatively attached to the receiver for supporting the patient transport apparatus for concurrent movement with the receiver relative to the stage between the lowered position and the raised position;a sensing system for monitoring the loading device;an output device arranged remotely from the loading device; anda monitor controller in communication with the sensing system and the output device, the monitor controller being configured to activate the output device in response to one or more signals received from the sensing system satisfying a predetermined condition for communicating a status of the loading device to a caregiver.II. The system of clause I, wherein the sensing system includes a dock sensor operatively attached to the loading device and configured to determine a presence of the patient transport apparatus at the dock.Docket No. 060252.01180III. The system of clause II, wherein the predetermined condition is defined by the dock sensor indicating an absence of the patient transport apparatus at the dock; andwherein the output device is configured to communicate to the caregiver that the patient transport apparatus is not present at the dock as the status of the loading device.IV. The system of any of clauses II-III, wherein the patient transport apparatus includes a pair of rear wheels to facilitate movement along floor surfaces in the one or more patient transport configurations;wherein the dock includes a pair of chocks each shaped to receive one of the pair of rear wheel of the patient transport apparatus to support the patient transport apparatus; and wherein the dock sensor is configured to determine alignment of the pair of rear wheels of the patient transport apparatus relative to the pair of chocks of the dock.V. The system of clause IV, wherein the predetermined condition is defined by the dock sensor indicating misalignment of the pair of rear wheels of the patient transport apparatus relative to the pair of chocks of the dock of the loading device; andwherein the output device is configured to communicate to the caregiver that the patient transport apparatus is not correctly aligned with the dock as the status of the loading device.VI. The system of any of clauses I-V, wherein the loading device includes a retainer for releasably engaging the support structure of the patient transport apparatus, the retainer including:a catch arranged for releasably engaging the patient transport apparatus; and an adjuster interposed between the receiver and the catch to selectively move the catch relative to the receiver between:a retained position for inhibiting movement of the support structure out of contact with the catch to inhibit unloading of the patient transport apparatus, and a released position for permitting movement of the support structure relative to the catch to facilitate loading and unloading of the patient transport apparatus. VII. The system of clause VI, wherein the sensing system includes a retainer sensor operatively attached to the retainer and configured to determine an arrangement of the catch between the retained position and the released position.VIII. The system of clause VII, wherein the predetermined condition is defined by the retainer sensor indicating that the catch is not arranged in the retained position: andDocket No. 060252.01180wherein the output device is configured to communicate to the caregiver that the catch is not arranged in the retained position as the status of the loading device.IX. The system of any of clauses I- VIII, wherein the sensing system includes a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position.X. The system of clause IX, wherein the predetermined condition is defined by the receiver sensor indicating that the receiver is not arranged in the raised position; andwherein the output device is configured to communicate to the caregiver that the receiver is not arranged in the raised position as the status of the loading device.XI. The system of any of clauses I-X, wherein the loading device includes a stage lock interposed between the stage and the receiver to selectively inhibit movement of the receiver relative to the stage between the lowered position and the raised position.XII. The system of clause XI, wherein the stage lock is configured to maintain the receiver in the raised position; andwherein the sensing system includes a stage sensor operatively attached to the stage lock and configured to determine changes in engagement of the stage lock.XIII. The system of clause XII, wherein the predetermined condition is defined by the stage sensor indicating that the stage lock is disengaged; andwherein the output device is configured to communicate to the caregiver that the stage lock is disengaged as the status of the loading device.XIV. The system of any of clauses I-XIII, wherein the loading device includes a limiter interposed between the stage and the receiver to inhibit movement of the receiver relative to the stage in a plurality of degrees of freedom.XV. The system of clause XIV, wherein the loading device includes:a second stage operatively attached to the mount;a second receiver supporting the stage and arranged for translational movement relative to the second stage between a retracted position and an extended position; and a second limiter interposed between the second stage and the second receiver to inhibit movement of the second receiver relative to the second stage in a second plurality of degrees of freedom.Docket No. 060252.01180XVI. The loading device of clause XV, wherein movement of the receiver relative to the stage between the lowered position and the raised position occurs in a vertical direction; and wherein movement of the second receiver relative to the second stage between the retracted position and the extended position occurs in a direction transverse to the vertical direction.XVII. The system of any of clauses XV-XVI, wherein the sensing system includes a second receiver sensor operatively attached to the loading device and configured to determine an arrangement of the second receiver relative to the second stage between the retracted position and the extended position.XVIII. The system of clause XVII, wherein the predetermined condition is defined by the second receiver sensor indicating that the second receiver is not arranged in the retracted position; andwherein the output device is configured to communicate to the caregiver that the second receiver is not arranged in the retracted position as the status of the loading device.XIX. The system of any of clauses XV-XVIII, wherein the sensing system includes; a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position, anda second receiver sensor operatively attached to the loading device and configured to determine an arrangement of the second receiver relative to the second stage between the retracted position and the extended position;wherein the predetermined condition is defined by one or more of:the receiver sensor indicating that the receiver is not arranged in the raised position, andthe second receiver sensor indicating that the second receiver is not arranged in the retracted position; andwherein the output device is configured to communicate to the caregiver that one or more of the receiver and the second receiver are not arranged for vehicle transport as the status of the loading device.XX. The system of any of clauses XV-XIX, wherein the loading device includes:Docket No. 060252.01180a stage lock interposed between the stage and the receiver to selectively inhibit movement of the receiver relative to the stage between the lowered position and the raised position, anda second stage lock interposed between the second stage and the second receiver to selectively inhibit movement of the second receiver relative to the second stage between the retracted position and the extended position.XXL The system of clause XX, wherein the stage lock is configured to maintain the receiver in the raised position;wherein the second stage lock is configured to maintain the second receiver in the retracted position; andwherein the sensing system includes:a stage sensor operatively attached to the stage lock and configured to determine changes in engagement of the stage lock, anda second stage sensor operatively attached to the second stage lock and configured to determine changes in engagement of the second stage lock.XXII. The system of clause XXI, wherein the predetermined condition is defined by one or more of:the stage sensor indicating that the stage lock is disengaged, andthe second stage sensor indicating that the second stage lock is disengaged; and wherein the output device is configured to communicate to the caregiver that one or more of the stage lock and the second stage lock are disengaged as the status of the loading device.XXIII. The system of any of clauses I-XXII, wherein the patient transport apparatus includes:a motor coupled to the support structure and operably coupled to the track assembly for operating the movable belt, anda battery coupled to the support structure and in electrical communication with the motor.XXIV. The system of clause XXIII, wherein the sensing system includes a battery sensor to determine a presence of the battery of the patient transport apparatus;wherein the predetermined condition is defined based on an absence of the battery of the patient transport apparatus; andDocket No. 060252.01180wherein the output device is configured to communicate the absence of the battery of the patient transport apparatus to the caregiver.XXV. The system of any of clauses XXIII-XXIV, wherein the sensing system includes a battery sensor to determine a charge state of the battery of the patient transport apparatus.XXVI. The system of clause XXV, wherein the predetermined condition is defined based on the charge state of the battery of the patient transport apparatus; andwherein the output device is configured to communicate the charge state of the battery of the patient transport apparatus to the caregiver.XXVII. The system of any of clauses XXV-XXVI, wherein the predetermined condition is defined by the battery sensor indicating that the charge state of the battery of the patient transport apparatus is depleted below a predetermined charge threshold; andwherein the output device is configured to communicate to the caregiver that the charge state of the battery of the patient transport apparatus is depleted.XXVIII. The system of any of clauses XXV-XXVII, wherein the output device includes a display screen to communicate the charge state of the battery of the patient transport apparatus to the caregiver.XXIX. The system of any of clauses XXV-XXVIII, wherein the output device includes one or more light emitting diodes to communicate the charge state of the battery of the patient transport apparatus to the caregiver.XXX. The system of any of clauses XXIII-XXIX, comprising a charger for charging the battery of the patient transport apparatus with power from a power source.XXXI. The system of clause XXX, wherein the patient transport apparatus includes an apparatus interface; andwherein the loading device includes a device interface arranged for electrical communication with the apparatus interface to charge the battery with power from the power source.XXXII. The system of clause XXXI, wherein the apparatus interface includes a plurality of apparatus power terminals; andwherein the device interface includes a plurality of device power terminals each arranged to abut a respective one of the plurality of apparatus power terminals when the patient transportDocket No. 060252.01180apparatus is supported by the dock of the loading device to charge the battery with power from the power source.XXXIII. The system of any of clauses XXXI-XXXII, wherein the apparatus interface includes an apparatus power coil; andwherein the device interface includes a device power coil arranged to transfer power with the apparatus power coil when the patient transport apparatus is supported by the dock of the loading device to charge the battery with power from the power source.XXXIV. The system of any of clauses XXX-XXXIII, wherein the sensing system includes a charger sensor to determine operation of the charger relative to the battery of the patient transport apparatus.XXXV. The system of clause XXXIV, wherein the predetermined condition is defined by the charger sensor indicating that the charger is not providing power to the battery of the patient transport apparatus; andwherein the output device is configured to communicate to the caregiver that the battery of the patient transport apparatus is not charging.XXXVI. The system of any of clauses XXIII-XXXV, wherein the loading device includes:a torque translator coupled to the receiver and arranged for operative engagement with the track assembly of the patient transport apparatus, andan elevating mechanism operably coupled between the stage and the receiver, the elevating mechanism including an actuator interface disposed in rotational communication with the torque translator and being configured to move the receiver relative to the stage from the lowered position to the raised position with torque generated by the motor of the patient transport apparatus for moving the receiver and the patient transport apparatus into a secured configuration for transit with the transport vehicle.XXXVII. The system of clause XXXVI, wherein the torque translator includes a traction roller supported for rotation and arranged for frictionally engaging the movable belt of the track assembly of the patient transport apparatus.XXXVIII. The system of any of clauses XXXVI-XXXVII, wherein the output device is configured for attaching within a driver compartment of the transport vehicle; andwherein the output device is configured to communicate to the caregiver that the receiver is arranged in the lowered position.Docket No. 060252.01180XXXIX. The system of any of clauses XXXVI-XXXVIII, wherein the sensing system includes a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position.XL. The system of clause XXXIX, wherein the sensing system includes a sensor arranged to detect movement of the transport vehicle;wherein the predetermined condition is defined by:the receiver sensor indicating that the receiver is not arranged in the raised position, andthe sensor indicating movement of the transport vehicle;wherein the monitor controller is disposed in communication with the motor of the patient transport apparatus; andin response to one or more signals received from the sensing system satisfying the predetermined condition, the monitor controller is configured to effect operation of the elevating mechanism to move the receiver relative to the stage from the lowered position to the raised position with torque generated by the motor of the patient transport apparatus.XLI. The system of any of clauses LXL, wherein the output device is operable between a first output mode and a second output mode different from the first output mode; and wherein the monitor controller is configured to change operation of the output device from the first output mode to the second output mode in response to the one or more signals received from the sensing system satisfying the predetermined condition.XLII. The system of clause XLI, wherein the output device includes a light emitting diode; wherein operation in the first output mode is further defined as an absence of light emission by the light emitting diode; andwherein operation in the second output mode is further defined as emission of light by the light emitting diode.XLIII. The system of any of clauses XLI-XLII, wherein the output device includes a light emitting diode;wherein operation in the first output mode is further defined as emission of light in a first color by the light emitting diode; andDocket No. 060252.01180wherein operation in the second output mode is further defined as emission of light in a second color, different from the first color, by the light emitting diode.XLIV. The system of any of clauses XLI-XLIII, wherein the output device includes a display screen;wherein operation in the second output mode is further defined as presentation of visual content including an alert message on the display screen; andwherein operation in the first output mode is further defined by an absence of visual content including an alert message on the display screen.XLV. The system of any of clauses XLI-XLIV, wherein the output device includes an audible indicator;wherein operation in the second output mode is further defined as generating an alarm with the audible indicator; andwherein operation in the first output mode is further defined by an absence of an alarm generated by the audible indicator.XLVI. The system of any of clauses I-XLV, wherein the output device is configured for attaching within a driver compartment of the transport vehicle; andwherein the output device is configured to communicate to the caregiver that the loading device is not secured for transit with the transport vehicle.XLVII. The system of clause XLVI, wherein the output device includes an audible indicator; andwherein the monitor controller is configured to generate an alarm with the audible indicator in response to the one or more signals received from the sensing system satisfying the predetermined condition indicating that the loading device is not secured for transit with the transport vehicle.XLVIII. The system of clause XLVII, comprising an override input control disposed in communication with the monitor controller and arranged for selective user engagement by the caregiver; andwherein the monitor controller is configured to silence the alarm generated by the audible indicator in response to user engagement with the override input control by the caregiver.Docket No. 060252.01180XLIX. The system of any of clauses XLVI-XLVTII, comprising a vehicle interlock disposed in communication with the monitor controller for selectively inhibiting transit of the transport vehicle; andwherein the monitor controller is configured to activate the vehicle interlock in response to the one or more signals received from the sensing system satisfying the predetermined condition indicating that the loading device is not secured for transit with the transport vehicle.L. The system of clause XLIX, comprising an override input control disposed in communication with the monitor controller and arranged for selective user engagement by the caregiver; andwherein the monitor controller is configured to deactivate the vehicle interlock in response to user engagement with the override input control by the caregiver.LI. The system of any of clauses LL, wherein the output device is configured for attaching within a driver compartment of the transport vehicle;wherein the loading device is configured for attaching within a compartment of the transport vehicle adjacent to a door of the transport vehicle; andwherein the sensing system includes a door sensor configured to determine an arrangement of the door of the transport vehicle.LIL The system of clause LI, wherein the predetermined condition is defined by the door sensor indicating that the door of the transport vehicle is not closed; andwherein the output device is configured to communicate to the caregiver that the door of the transport vehicle is open.Lin. A system for use in securing a patient transport apparatus to a transport vehicle, the patient transport apparatus including a support structure operable in a stowed configuration and having a track assembly with a movable belt for engaging stairs, the system comprising:a loading device configured to engage the patient transport apparatus in the stowed configuration for loading and unloading from the transport vehicle, the loading device including a dock configured for releasably securing the patient transport apparatus to the transport vehicle for transit in a secured configuration; anda monitoring system including:a sensing system for monitoring one or more of the loading device and the patient transport apparatus,Docket No. 060252.01180an output device arranged remotely from the loading device, anda monitor controller in communication with the sensing system and the output device, the monitor controller being configured to activate the output device in response to one or more signals received from the sensing system satisfying a predetermined condition for communicating a status of one or more of the loading device and the patient transport apparatus to a caregiver.LIV. The system of clause LIII, wherein the sensing system includes a dock sensor operatively attached to the loading device and configured to determine a presence of the patient transport apparatus at the dock.LV. The system of clause LIV, wherein the predetermined condition is defined by the dock sensor indicating an absence of the patient transport apparatus at the dock; andwherein the output device is configured to communicate to the caregiver that the patient transport apparatus is not present at the dock as the status of the loading device.LVI. The system of any of clauses LIV-LV, wherein the dock includes a pair of chocks shaped to receive rear wheels of the patient transport apparatus to support the patient transport apparatus; andwherein the dock sensor is configured to determine alignment of the rear wheels of the patient transport apparatus relative to the pair of chocks of the dock.LVII. The system of clause LVI, wherein the predetermined condition is defined by the dock sensor indicating misalignment of the rear wheels of the patient transport apparatus relative to the pair of chocks of the dock of the loading device; andwherein the output device is configured to communicate to the caregiver that the patient transport apparatus is not correctly aligned with the dock as the status of the loading device.LVIII. The system of any of clauses LIII-LVII, wherein the loading device includes a retainer for releasably engaging the support structure of the patient transport apparatus, the retainer including:a catch arranged for releasably engaging the patient transport apparatus; and an adjuster to selectively move the catch relative to the dock between;a retained position for inhibiting movement of the support structure out of contact with the catch to inhibit unloading of the patient transport apparatus, andDocket No. 060252.01180a released position for permitting movement of the support structure relative to the catch to facilitate loading and unloading of the patient transport apparatus. LIX. The system of clause LVIII, wherein the sensing system includes a retainer sensor operatively attached to the retainer and configured to determine an arrangement of the catch between the retained position and the released position.LX. The system of clause LIX, wherein the predetermined condition is defined by the retainer sensor indicating that the catch is not arranged in the retained position; and wherein the output device is configured to communicate to the caregiver that the catch is not arranged in the retained position as the status of the loading device.LXI. The system of any of clauses LIILLX, wherein the loading device includes:a mount configured for mounting to the transport vehicle;a stage operatively attached to the mount; anda receiver supporting the dock and arranged for movement relative to the stage between a lowered position and a raised position.LXII. The system of clause LXI, wherein the sensing system includes a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position.LXIII. The system of clause LXII, wherein the predetermined condition is defined by the receiver sensor indicating that the receiver is not arranged in the raised position; and wherein the output device is configured to communicate to the caregiver that the receiver is not arranged in the raised position as the status of the loading device.LXIV. The system of any of clauses LXI-LXIII, wherein the loading device includes a stage lock interposed between the stage and the receiver to selectively inhibit movement of the receiver relative to the stage between the lowered position and the raised position.LXV. The system of clause LXIV, wherein the stage lock is configured to maintain the receiver in the raised position; andwherein the sensing system includes a stage sensor operatively attached to the stage lock and configured to determine changes in engagement of the stage lock.LXVI. The system of clause LXV, wherein the predetermined condition is defined by the stage sensor indicating that the stage lock is disengaged; andDocket No. 060252.01180wherein the output device is configured to communicate to the caregiver that the stage lock is disengaged as the status of the loading device.LXVII. The system of any of clauses LXI-LXVI, wherein the loading device includes a limiter interposed between the stage and the receiver to inhibit movement of the receiver relative to the stage in a plurality of degrees of freedom.LXVIII. The system of clause LXVII, wherein the loading device includes:a second stage operatively attached to the mount;a second receiver supporting the stage and arranged for translational movement relative to the second stage between a retracted position and an extended position; and a second limiter interposed between the second stage and the second receiver to inhibit movement of the second receiver relative to the second stage in a second plurality of degrees of freedom.LXIX. The loading device of clause LXVIII, wherein movement of the receiver relative to the stage between the lowered position and the raised position occurs in a vertical direction; and wherein movement of the second receiver relative to the second stage between the retracted position and the extended position occurs in a direction transverse to the vertical direction.LXX. The system of any of clauses LXVIILLXIX, wherein the sensing system includes a second receiver sensor operatively attached to the loading device and configured to determine an arrangement of the second receiver relative to the second stage between the retracted position and the extended position.LXXI. The system of clause LXX, wherein the predetermined condition is defined by the second receiver sensor indicating that the second receiver is not arranged in the retracted position; andwherein the output device is configured to communicate to the caregiver that the second receiver is not arranged in the retracted position as the status of the loading device.LXXII. The system of any of clauses LXVIILLXXI, wherein the sensing system includes:a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position, andDocket No. 060252.01180a second receiver sensor operatively attached to the loading device and configured to determine an arrangement of the second receiver relative to the second stage between the retracted position and the extended position;wherein the predetermined condition is defined by one or more of:the receiver sensor indicating that the receiver is not arranged in the raised position, andthe second receiver sensor indicating that the second receiver is not arranged in the retracted position; andwherein the output device is configured to communicate to the caregiver that one or more of the receiver and the second receiver are not arranged for vehicle transport as the status of the loading device.LXXIII. The system of any of clauses LXVIII-LXXII, wherein the loading device includes:a stage lock interposed between the stage and the receiver to selectively inhibit movement of the receiver relative to the stage between the lowered position and the raised position, anda second stage lock interposed between the second stage and the second receiver to selectively inhibit movement of the second receiver relative to the second stage between the retracted position and the extended position.LXXIV. The system of clause LXXIII, wherein the stage lock is configured to maintain the receiver in the raised position;wherein the second stage lock is configured to maintain the second receiver in the retracted position; andwherein the sensing system includes:a stage sensor operatively attached to the stage lock and configured to determine changes in engagement of the stage lock, anda second stage sensor operatively attached to the second stage lock and configured to determine changes in engagement of the second stage lock.LXXV. The system of clause LXXIV, wherein the predetermined condition is defined by one or more of:the stage sensor indicating that the stage lock is disengaged, andDocket No. 060252.01180the second stage sensor indicating that the second stage lock is disengaged; and wherein the output device is configured to communicate to the caregiver that one or more of the stage lock and the second stage lock are disengaged as the status of the loading device.LXXVI. The system of any of clauses LIII-LXXV, wherein the output device is operable between a first output mode and a second output mode different from the first output mode; and wherein the monitor controller is configured to change operation of the output device from the first output mode to the second output mode in response to the one or more signals received from the sensing system satisfying the predetermined condition.LXXVII. The system of clause LXXVI, wherein the output device includes a light emitting diode;wherein operation in the first output mode is further defined as an absence of light emission by the light emitting diode; andwherein operation in the second output mode is further defined as emission of light by the light emitting diode.LXXVIII. The system of any of clauses LXXVI-LXXVII, wherein the output device includes a light emitting diode;wherein operation in the first output mode is further defined as emission of light in a first color by the light emitting diode; andwherein operation in the second output mode is further defined as emission of light in a second color, different from the first color, by the light emitting diode.LXXIX. The system of any of clauses LXXVI-LXXVIII, wherein the output device includes a display screen;wherein operation in the second output mode is further defined as presentation of visual content including an alert message on the display screen; andwherein operation in the first output mode is further defined by an absence of visual content including an alert message on the display screen.LXXX. The system of any of clauses LXXVI-LXXIX, wherein the output device includes an audible indicator;wherein operation in the second output mode is further defined as generating an alarm with the audible indicator; andDocket No. 060252.01180wherein operation in the first output mode is further defined by an absence of an alarm generated by the audible indicator.LXXXI. The system of any of clauses LIII-LXXX, wherein the output device is configured for attaching within a driver compartment of the transport vehicle; andwherein the output device is configured to communicate to the caregiver that one or more of the loading device and the patient transport apparatus is not secured for transit with the transport vehicle.LXXXII. The system of clause LXXXI, wherein the output device includes an audible indicator; andwherein the monitor controller is configured to generate an alarm with the audible indicator in response to the one or more signals received from the sensing system satisfying the predetermined condition indicating that one or more of the loading device and the patient transport apparatus is not secured for transit with the transport vehicle.LXXXIII. The system of clause LXXXII, comprising an override input control disposed in communication with the monitor controller and arranged for selective user engagement by the caregiver; andwherein the monitor controller is configured to silence the alarm generated by the audible indicator in response to user engagement with the override input control by the caregiver.LXXXIV. The system of any of clauses LXXXI-LXXXIII, comprising a vehicle interlock disposed in communication with the monitor controller for selectively inhibiting transit of the transport vehicle; andwherein the monitor controller is configured to activate the vehicle interlock in response to the one or more signals received from the sensing system satisfying the predetermined condition indicating that one or more of the loading device and the patient transport apparatus is not secured for transit with the transport vehicle.LXXXV. The system of clause LXXXIV, comprising an override input control disposed in communication with the monitor controller and arranged for selective user engagement by the caregiver; andwherein the monitor controller is configured to deactivate the vehicle interlock in response to user engagement with the override input control by the caregiver.Docket No. 060252.01180LXXXVI. The system of any of clauses LIII-LXXXV, wherein the output device is configured for attaching within a driver compartment of the transport vehicle;wherein the loading device is configured for attaching within a compartment of the transport vehicle adjacent to a door of the transport vehicle; andwherein the sensing system includes a door sensor configured to determine an arrangement of the door of the transport vehicle.LXXXVII. The system of clause LXXXVI, wherein the predetermined condition is defined by the door sensor indicating that the door of the transport vehicle is not closed; and wherein the output device is configured to communicate to the caregiver that the door of the transport vehicle is open.

Claims

Docket No. 060252.01180CLAIMSWhat is claimed is:

1. A system for use with a transport vehicle, the system comprising:a patient transport apparatus including:a support structure having a seat section and being movable between a stowed configuration and one or more patient transport configurations,a track assembly operatively attached to the support structure and including a movable belt for engaging stairs in one of the one or more patient transport configurations, a loading device configured to engage the patient transport apparatus in the stowed configuration for loading and unloading from the transport vehicle, the loading device including:a mount configured for mounting to the transport vehicle,a stage operatively attached to the mount,a receiver arranged for movement relative to the stage between a lowered position and a raised position, anda dock operatively attached to the receiver for supporting the patient transport apparatus for concurrent movement with the receiver relative to the stage between the lowered position and the raised position;a sensing system for monitoring the loading device;an output device arranged remotely from the loading device; anda monitor controller in communication with the sensing system and the output device, the monitor controller being configured to activate the output device in response to one or more signals received from the sensing system satisfying a predetermined condition for communicating a status of the loading device to a caregiver.

2. The system of claim 1, wherein the sensing system includes a dock sensor operatively attached to the loading device and configured to determine a presence of the patient transport apparatus at the dock.

3. The system of claim 2, wherein the predetermined condition is defined by the dock sensor indicating an absence of the patient transport apparatus at the dock; andwherein the output device is configured to communicate to the caregiver that the patient transport apparatus is not present at the dock as the status of the loading device.Docket No. 060252.011804. The system of claim 2, wherein the patient transport apparatus includes a pair of rear wheels to facilitate movement along floor surfaces in the one or more patient transport configurations;wherein the dock includes a pair of chocks each shaped to receive one of the pair of rear wheel of the patient transport apparatus to support the patient transport apparatus; and wherein the dock sensor is configured to determine alignment of the pair of rear wheels of the patient transport apparatus relative to the pair of chocks of the dock.

5. The system of claim 4, wherein the predetermined condition is defined by the dock sensor indicating misalignment of the pair of rear wheels of the patient transport apparatus relative to the pair of chocks of the dock of the loading device; andwherein the output device is configured to communicate to the caregiver that the patient transport apparatus is not correctly aligned with the dock as the status of the loading device.

6. The system of claim 1, wherein the loading device includes a retainer for releasably engaging the support structure of the patient transport apparatus, the retainer including:a catch arranged for releasably engaging the patient transport apparatus; and an adjuster interposed between the receiver and the catch to selectively move the catch relative to the receiver between:a retained position for inhibiting movement of the support structure out of contact with the catch to inhibit unloading of the patient transport apparatus, and a released position for permitting movement of the support structure relative to the catch to facilitate loading and unloading of the patient transport apparatus.

7. The system of claim 6, wherein the sensing system includes a retainer sensor operatively attached to the retainer and configured to determine an arrangement of the catch between the retained position and the released position.

8. The system of claim 7, wherein the predetermined condition is defined by the retainer sensor indicating that the catch is not arranged in the retained position; andwherein the output device is configured to communicate to the caregiver that the catch is not arranged in the retained position as the status of the loading device.

9. The system of claim 1, wherein the sensing system includes a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position.Docket No. 060252.0118010. The system of claim 9, wherein the predetermined condition is defined by the receiver sensor indicating that the receiver is not arranged in the raised position; andwherein the output device is configured to communicate to the caregiver that the receiver is not arranged in the raised position as the status of the loading device.

11. The system of claim 1, wherein the loading device includes a stage lock interposed between the stage and the receiver to selectively inhibit movement of the receiver relative to the stage between the lowered position and the raised position.

12. The system of claim 11, wherein the stage lock is configured to maintain the receiver in the raised position; andwherein the sensing system includes a stage sensor operatively attached to the stage lock and configured to determine changes in engagement of the stage lock.

13. The system of claim 12, wherein the predetermined condition is defined by the stage sensor indicating that the stage lock is disengaged; andwherein the output device is configured to communicate to the caregiver that the stage lock is disengaged as the status of the loading device.

14. The system of claim 1, wherein the loading device includes a limiter interposed between the stage and the receiver to inhibit movement of the receiver relative to the stage in a plurality of degrees of freedom.

15. The system of claim 14, wherein the loading device includes:a second stage operatively attached to the mount;a second receiver supporting the stage and arranged for translational movement relative to the second stage between a retracted position and an extended position; and a second limiter interposed between the second stage and the second receiver to inhibit movement of the second receiver relative to the second stage in a second plurality of degrees of freedom.

16. The loading device of claim 15, wherein movement of the receiver relative to the stage between the lowered position and the raised position occurs in a vertical direction; and wherein movement of the second receiver relative to the second stage between the retracted position and the extended position occurs in a direction transverse to the vertical direction.

17. The system of claim 15, wherein the sensing system includes a second receiver sensor operatively attached to the loading device and configured to determine an arrangement of theDocket No. 060252.01180second receiver relative to the second stage between the retracted position and the extended position.

18. The system of claim 17, wherein the predetermined condition is defined by the second receiver sensor indicating that the second receiver is not arranged in the retracted position; and wherein the output device is configured to communicate to the caregiver that the second receiver is not arranged in the retracted position as the status of the loading device.

19. The system of claim 15, wherein the sensing system includes:a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position, anda second receiver sensor operatively attached to the loading device and configured to determine an arrangement of the second receiver relative to the second stage between the retracted position and the extended position;wherein the predetermined condition is defined by one or more of:the receiver sensor indicating that the receiver is not arranged in the raised position, andthe second receiver sensor indicating that the second receiver is not arranged in the retracted position; andwherein the output device is configured to communicate to the caregiver that one or more of the receiver and the second receiver are not arranged for vehicle transport as the status of the loading device.

20. The system of claim 15, wherein the loading device includes:a stage lock interposed between the stage and the receiver to selectively inhibit movement of the receiver relative to the stage between the lowered position and the raised position, anda second stage lock interposed between the second stage and the second receiver to selectively inhibit movement of the second receiver relative to the second stage between the retracted position and the extended position.

21. The system of claim 20, wherein the stage lock is configured to maintain the receiver in the raised position;Docket No. 060252.01180wherein the second stage lock is configured to maintain the second receiver in the retracted position; andwherein the sensing system includes:a stage sensor operatively attached to the stage lock and configured to determine changes in engagement of the stage lock, anda second stage sensor operatively attached to the second stage lock and configured to determine changes in engagement of the second stage lock.

22. The system of claim 21, wherein the predetermined condition is defined by one or more of:the stage sensor indicating that the stage lock is disengaged, andthe second stage sensor indicating that the second stage lock is disengaged; and wherein the output device is configured to communicate to the caregiver that one or more of the stage lock and the second stage lock are disengaged as the status of the loading device.

23. The system of claim 1, wherein the patient transport apparatus includes:a motor coupled to the support structure and operably coupled to the track assembly for operating the movable belt, anda battery coupled to the support structure and in electrical communication with the motor.

24. The system of claim 23, wherein the sensing system includes a battery sensor to determine a presence of the battery of the patient transport apparatus;wherein the predetermined condition is defined based on an absence of the battery of the patient transport apparatus; andwherein the output device is configured to communicate the absence of the battery of the patient transport apparatus to the caregiver.

25. The system of claim 23, wherein the sensing system includes a battery sensor to determine a charge state of the battery of the patient transport apparatus.

26. The system of claim 25, wherein the predetermined condition is defined based on the charge state of the battery of the patient transport apparatus; andwherein the output device is configured to communicate the charge state of the battery of the patient transport apparatus to the caregiver.Docket No. 060252.0118027. The system of claim 25, wherein the predetermined condition is defined by the battery sensor indicating that the charge state of the battery of the patient transport apparatus is depleted below a predetermined charge threshold: andwherein the output device is configured to communicate to the caregiver that the charge state of the battery of the patient transport apparatus is depleted.

28. The system of claim 25. wherein the output device includes a display screen to communicate the charge state of the battery of the patient transport apparatus to the caregiver.

29. The system of claim 25, wherein the output device includes one or more light emitting diodes to communicate the charge state of the battery of the patient transport apparatus to the caregiver.

30. The system of claim 23, comprising a charger for charging the battery of the patient transport apparatus with power from a power source.

31. The system of claim 30, wherein the patient transport apparatus includes an apparatus interface; andwherein the loading device includes a device interface arranged for electrical communication with the apparatus interface to charge the battery with power from the power source.

32. The system of claim 31, wherein the apparatus interface includes a plurality of apparatus power terminals; andwherein the device interface includes a plurality of device power terminals each arranged to abut a respective one of the plurality of apparatus power terminals when the patient transport apparatus is supported by the dock of the loading device to charge the battery with power from the power source.

33. The system of claim 31, wherein the apparatus interface includes an apparatus power coil; andwherein the device interface includes a device power coil arranged to transfer power with the apparatus power coil when the patient transport apparatus is supported by the dock of the loading device to charge the battery with power from the power source.

34. The system of claim 30, wherein the sensing system includes a charger sensor to determine operation of the charger relative to the battery of the patient transport apparatus.Docket No. 060252.0118035. The system of claim 34, wherein the predetermined condition is defined by the charger sensor indicating that the charger is not providing power to the battery of the patient transport apparatus; andwherein the output device is configured to communicate to the caregiver that the battery of the patient transport apparatus is not charging.

36. The system of claim 23, wherein the loading device includes:a torque translator coupled to the receiver and arranged for operative engagement with the track assembly of the patient transport apparatus, andan elevating mechanism operably coupled between the stage and the receiver, the elevating mechanism including an actuator interface disposed in rotational communication with the torque translator and being configured to move the receiver relative to the stage from the lowered position to the raised position with torque generated by the motor of the patient transport apparatus for moving the receiver and the patient transport apparatus into a secured configuration for transit with the transport vehicle.

37. The system of claim 36, wherein the torque translator includes a traction roller supported for rotation and arranged for frictionally engaging the movable belt of the track assembly of the patient transport apparatus.

38. The system of claim 36, wherein the output device is configured for attaching within a driver compartment of the transport vehicle; andwherein the output device is configured to communicate to the caregiver that the receiver is arranged in the lowered position.

39. The system of claim 36, wherein the sensing system includes a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position.

40. The system of claim 39, wherein the sensing system includes a sensor arranged to detect movement of the transport vehicle;wherein the predetermined condition is defined by:the receiver sensor indicating that the receiver is not arranged in the raised position, andthe sensor indicating movement of the transport vehicle;Docket No. 060252.01180wherein the monitor controller is disposed in communication with the motor of the patient transport apparatus; andin response to one or more signals received from the sensing system satisfying the predetermined condition, the monitor controller is configured to effect operation of the elevating mechanism to move the receiver relative to the stage from the lowered position to the raised position with torque generated by the motor of the patient transport apparatus.

41. The system of claim 1, wherein the output device is operable between a first output mode and a second output mode different from the first output mode; andwherein the monitor controller is configured to change operation of the output device from the first output mode to the second output mode in response to the one or more signals received from the sensing system satisfying the predetermined condition.

42. The system of claim 41, wherein the output device includes a light emitting diode; wherein operation in the first output mode is further defined as an absence of light emission by the light emitting diode; andwherein operation in the second output mode is further defined as emission of light by the light emitting diode.

43. The system of claim 41, wherein the output device includes a light emitting diode; wherein operation in the first output mode is further defined as emission of light in a first color by the light emitting diode; andwherein operation in the second output mode is further defined as emission of light in a second color, different from the first color, by the light emitting diode.

44. The system of claim 41, wherein the output device includes a display screen; wherein operation in the second output mode is further defined as presentation of visual content including an alert message on the display screen; andwherein operation in the first output mode is further defined by an absence of visual content including an alert message on the display screen.

45. The system of claim 41, wherein the output device includes an audible indicator; wherein operation in the second output mode is further defined as generating an alarm with the audible indicator; andwherein operation in the first output mode is further defined by an absence of an alarm generated by the audible indicator.Docket No. 060252.0118046. The system of claim 1, wherein the output device is configured for attaching within a driver compartment of the transport vehicle; andwherein the output device is configured to communicate to the caregiver that the loading device is not secured for transit with the transport vehicle.

47. The system of claim 46, wherein the output device includes an audible indicator; and wherein the monitor controller is configured to generate an alarm with the audible indicator in response to the one or more signals received from the sensing system satisfying the predetermined condition indicating that the loading device is not secured for transit with the transport vehicle.

48. The system of claim 47, comprising an override input control disposed in communication with the monitor controller and arranged for selective user engagement by the caregiver; andwherein the monitor controller is configured to silence the alarm generated by the audible indicator in response to user engagement with the override input control by the caregiver.

49. The system of claim 46, comprising a vehicle interlock disposed in communication with the monitor controller for selectively inhibiting transit of the transport vehicle; and wherein the monitor controller is configured to activate the vehicle interlock in response to the one or more signals received from the sensing system satisfying the predetermined condition indicating that the loading device is not secured for transit with the transport vehicle.

50. The system of claim 49, comprising an override input control disposed in communication with the monitor controller and arranged for selective user engagement by the caregiver; andwherein the monitor controller is configured to deactivate the vehicle interlock in response to user engagement with the override input control by the caregiver.

51. The system of claim 1, wherein the output device is configured for attaching within a driver compartment of the transport vehicle;wherein the loading device is configured for attaching within a compartment of the transport vehicle adjacent to a door of the transport vehicle; andwherein the sensing system includes a door sensor configured to determine an arrangement of the door of the transport vehicle.Docket No. 060252.0118052. The system of claim 51, wherein the predetermined condition is defined by the door sensor indicating that the door of the transport vehicle is not closed; andwherein the output device is configured to communicate to the caregiver that the door of the transport vehicle is open.

53. A system for use in securing a patient transport apparatus to a transport vehicle, the patient transport apparatus including a support structure operable in a stowed configuration and having a track assembly with a movable belt for engaging stairs, the system comprising:a loading device configured to engage the patient transport apparatus in the stowed configuration for loading and unloading from the transport vehicle, the loading device including a dock configured for releasably securing the patient transport apparatus to the transport vehicle for transit in a secured configuration; anda monitoring system including:a sensing system for monitoring one or more of the loading device and the patient transport apparatus,an output device arranged remotely from the loading device, anda monitor controller in communication with the sensing system and the output device, the monitor controller being configured to activate the output device in response to one or more signals received from the sensing system satisfying a predetermined condition for communicating a status of one or more of the loading device and the patient transport apparatus to a caregiver.

54. The system of claim 53, wherein the sensing system includes a dock sensor operatively attached to the loading device and configured to determine a presence of the patient transport apparatus at the dock.

55. The system of claim 54, wherein the predetermined condition is defined by the dock sensor indicating an absence of the patient transport apparatus at the dock; andwherein the output device is configured to communicate to the caregiver that the patient transport apparatus is not present at the dock as the status of the loading device.

56. The system of claim 54, wherein the dock includes a pair of chocks shaped to receive rear wheels of the patient transport apparatus to support the patient transport apparatus; and wherein the dock sensor is configured to determine alignment of the rear wheels of the patient transport apparatus relative to the pair of chocks of the dock.Docket No. 060252.0118057. The system of claim 56, wherein the predetermined condition is defined by the dock sensor indicating misalignment of the rear wheels of the patient transport apparatus relative to the pair of chocks of the dock of the loading device; andwherein the output device is configured to communicate to the caregiver that the patient transport apparatus is not correctly aligned with the dock as the status of the loading device.

58. The system of claim 53, wherein the loading device includes a retainer for releasably engaging the support structure of the patient transport apparatus, the retainer including:a catch arranged for releasably engaging the patient transport apparatus; and an adjuster to selectively move the catch relative to the dock between;a retained position for inhibiting movement of the support structure out of contact with the catch to inhibit unloading of the patient transport apparatus, and a released position for permitting movement of the support structure relative to the catch to facilitate loading and unloading of the patient transport apparatus.

59. The system of claim 58, wherein the sensing system includes a retainer sensor operatively attached to the retainer and configured to determine an arrangement of the catch between the retained position and the released position.

60. The system of claim 59, wherein the predetermined condition is defined by the retainer sensor indicating that the catch is not arranged in the retained position; andwherein the output device is configured to communicate to the caregiver that the catch is not arranged in the retained position as the status of the loading device.

61. The system of claim 53, wherein the loading device includes:a mount configured for mounting to the transport vehicle;a stage operatively attached to the mount; anda receiver supporting the dock and arranged for movement relative to the stage between a lowered position and a raised position.

62. The system of claim 61, wherein the sensing system includes a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position.

63. The system of claim 62, wherein the predetermined condition is defined by the receiver sensor indicating that the receiver is not arranged in the raised position; andDocket No. 060252.01180wherein the output device is configured to communicate to the caregiver that the receiver is not arranged in the raised position as the status of the loading device.

64. The system of claim 61, wherein the loading device includes a stage lock interposed between the stage and the receiver to selectively inhibit movement of the receiver relative to the stage between the lowered position and the raised position.

65. The system of claim 64, wherein the stage lock is configured to maintain the receiver in the raised position; andwherein the sensing system includes a stage sensor operatively attached to the stage lock and configured to determine changes in engagement of the stage lock.

66. The system of claim 65, wherein the predetermined condition is defined by the stage sensor indicating that the stage lock is disengaged; andwherein the output device is configured to communicate to the caregiver that the stage lock is disengaged as the status of the loading device.

67. The system of claim 61, wherein the loading device includes a limiter interposed between the stage and the receiver to inhibit movement of the receiver relative to the stage in a plurality of degrees of freedom.

68. The system of claim 67, wherein the loading device includes:a second stage operatively attached to the mount;a second receiver supporting the stage and arranged for translational movement relative to the second stage between a retracted position and an extended position; and a second limiter interposed between the second stage and the second receiver to inhibit movement of the second receiver relative to the second stage in a second plurality of degrees of freedom.

69. The loading device of claim 68, wherein movement of the receiver relative to the stage between the lowered position and the raised position occurs in a vertical direction; and wherein movement of the second receiver relative to the second stage between the retracted position and the extended position occurs in a direction transverse to the vertical direction.

70. The system of claim 68, wherein the sensing system includes a second receiver sensor operatively attached to the loading device and configured to determine an arrangement of the second receiver relative to the second stage between the retracted position and the extended position.Docket No. 060252.0118071. The system of claim 70, wherein the predetermined condition is defined by the second receiver sensor indicating that the second receiver is not arranged in the retracted position; and wherein the output device is configured to communicate to the caregiver that the second receiver is not arranged in the retracted position as the status of the loading device.

72. The system of claim 68, wherein the sensing system includes:a receiver sensor operatively attached to the loading device and configured to determine an arrangement of the receiver relative to the stage between the lowered position and the raised position, anda second receiver sensor operatively attached to the loading device and configured to determine an arrangement of the second receiver relative to the second stage between the retracted position and the extended position;wherein the predetermined condition is defined by one or more of:the receiver sensor indicating that the receiver is not arranged in the raised position, andthe second receiver sensor indicating that the second receiver is not arranged in the retracted position; andwherein the output device is configured to communicate to the caregiver that one or more of the receiver and the second receiver are not arranged for vehicle transport as the status of the loading device.

73. The system of claim 68, wherein the loading device includes:a stage lock interposed between the stage and the receiver to selectively inhibit movement of the receiver relative to the stage between the lowered position and the raised position, anda second stage lock interposed between the second stage and the second receiver to selectively inhibit movement of the second receiver relative to the second stage between the retracted position and the extended position.

74. The system of claim 73, wherein the stage lock is configured to maintain the receiver in the raised position;wherein the second stage lock is configured to maintain the second receiver in the retracted position; andwherein the sensing system includes:Docket No. 060252.01180a stage sensor operatively attached to the stage lock and configured to determine changes in engagement of the stage lock, anda second stage sensor operatively attached to the second stage lock and configured to determine changes in engagement of the second stage lock.

75. The system of claim 74, wherein the predetermined condition is defined by one or more of:the stage sensor indicating that the stage lock is disengaged, andthe second stage sensor indicating that the second stage lock is disengaged; and wherein the output device is configured to communicate to the caregiver that one or more of the stage lock and the second stage lock are disengaged as the status of the loading device.

76. The system of claim 53, wherein the output device is operable between a first output mode and a second output mode different from the first output mode; andwherein the monitor controller is configured to change operation of the output device from the first output mode to the second output mode in response to the one or more signals received from the sensing system satisfying the predetermined condition.

77. The system of claim 76, wherein the output device includes a light emitting diode; wherein operation in the first output mode is further defined as an absence of light emission by the light emitting diode; andwherein operation in the second output mode is further defined as emission of light by the light emitting diode.

78. The system of claim 76, wherein the output device includes a light emitting diode; wherein operation in the first output mode is further defined as emission of light in a first color by the light emitting diode; andwherein operation in the second output mode is further defined as emission of light in a second color, different from the first color, by the light emitting diode.

79. The system of claim 76, wherein the output device includes a display screen; wherein operation in the second output mode is further defined as presentation of visual content including an alert message on the display screen; andwherein operation in the first output mode is further defined by an absence of visual content including an alert message on the display screen.

80. The system of claim 76, wherein the output device includes an audible indicator;Docket No. 060252.01180wherein operation in the second output mode is further defined as generating an alarm with the audible indicator; andwherein operation in the first output mode is further defined by an absence of an alarm generated by the audible indicator.

81. The system of claim 53, wherein the output device is configured for attaching within a driver compartment of the transport vehicle; andwherein the output device is configured to communicate to the caregiver that one or more of the loading device and the patient transport apparatus is not secured for transit with the transport vehicle.

82. The system of claim 81, wherein the output device includes an audible indicator; and wherein the monitor controller is configured to generate an alarm with the audible indicator in response to the one or more signals received from the sensing system satisfying the predetermined condition indicating that one or more of the loading device and the patient transport apparatus is not secured for transit with the transport vehicle.

83. The system of claim 82, comprising an override input control disposed in communication with the monitor controller and arranged for selective user engagement by the caregiver; andwherein the monitor controller is configured to silence the alarm generated by the audible indicator in response to user engagement with the override input control by the caregiver.

84. The system of claim 81, comprising a vehicle interlock disposed in communication with the monitor controller for selectively inhibiting transit of the transport vehicle; and wherein the monitor controller is configured to activate the vehicle interlock in response to the one or more signals received from the sensing system satisfying the predetermined condition indicating that one or more of the loading device and the patient transport apparatus is not secured for transit with the transport vehicle.

85. The system of claim 84, comprising an override input control disposed in communication with the monitor controller and arranged for selective user engagement by the caregiver; andwherein the monitor controller is configured to deactivate the vehicle interlock in response to user engagement with the override input control by the caregiver.Docket No. 060252.0118086. The system of claim 53, wherein the output device is configured for attaching within a driver compartment of the transport vehicle;wherein the loading device is configured for attaching within a compartment of the transport vehicle adjacent to a door of the transport vehicle; andwherein the sensing system includes a door sensor configured to determine an arrangement of the door of the transport vehicle.

87. The system of claim 86, wherein the predetermined condition is defined by the door sensor indicating that the door of the transport vehicle is not closed; andwherein the output device is configured to communicate to the caregiver that the door of the transport vehicle is open.

Images