Manifold assembly

Abstract

A manifold assembly includes a manifold core defining an inlet tube, an outlet tube, a first protrusion configured to be fluidly coupled with a first bladder, and a second protrusion configured to be fluidly coupled with a second bladder. The connector is operably coupled to the manifold core and defines a first passage region, a second passage region, and a release notch. The motor rotates the connector to a first position to fluidly couple the outlet tube with the first projection via the first passage region and fluidly couple the inlet tube with the second projection via the second passage region, and rotates the connector to a second position to fluidly couple the first and projections with the release recess, and rotating the connector to a third position to fluidly couple the outlet tube with the second protrusion via the first passage region and fluidly couple the inlet tube with the first protrusion via the second passage region.

Description

Background Art

[0001] Patients in hospitals and medical institutions may be treated using therapeutic mattresses. Therapeutic mattresses typically include cells that can be inflated and deflated. Therapeutic mattresses may be used with an air source for generating an air flow and a device for directing the air flow to the cells. Technical Field

[0002] The present disclosure relates generally to a manifold assembly and, more particularly, to a manifold assembly for providing patient treatment. Summary of the invention

[0003] According to one aspect of the present disclosure, a manifold assembly includes a manifold core, which defines an inlet tube defining a portion of a positive pressure path, an outlet tube defining a portion of a negative pressure path, a first protrusion configured to be coupled to a first airbag fluid, and a second protrusion configured to be coupled to a second airbag fluid. A connector is operably coupled to the manifold core. The connector defines a first passage area, a second passage area, and a first release recess and a second release recess. A motor is operably coupled to the connector to rotate the connector relative to the manifold core. The motor is configured to: rotate the connector to a first position to fluidly couple the outlet tube to the first protrusion via the first passage area and to fluidly couple the inlet tube to the second protrusion via the second passage area; rotate the connector to a second position to fluidly couple the first protrusion to the first release recess and to fluidly couple the second protrusion to the second release recess; and rotate the connector to a third position to fluidly couple the outlet tube to the second protrusion via the first passage area and to fluidly couple the inlet tube to the first protrusion via the second passage area.

[0004] According to another aspect of the present disclosure, a surface assembly includes a covering defining an interior. A first airbag is disposed in the interior. A second airbag is disposed in the interior. Each of the first airbag and the second airbag is operable between an expanded state, a neutral state, and a compressed state. A pump has an inlet port and an outlet port. The pump is configured to provide positive pressure through the outlet port and to provide negative pressure through the inlet port. A manifold assembly is in fluid communication with the pump and each of the first and second airbags. The manifold assembly includes a manifold core having an inlet pipe in fluid communication with the outlet port and an outlet pipe in fluid communication with the inlet port. The manifold core has a first protrusion in fluid communication with the first airbag and a second protrusion in fluid communication with the second airbag. A connector is operably coupled to the manifold core. The connector defines a first passage area, a second passage area, and a release notch. A motor is operably coupled to the connector. The motor is configured to rotate the connector relative to the manifold core to couple the first bladder fluid to the inlet port and the second bladder fluid to the outlet port in a first operating state and to couple the first bladder fluid to the outlet port and the second bladder fluid to the inlet port in a second operating state.

[0005] According to another aspect of the present disclosure, a pneumatic system includes a first airbag and a second airbag arranged in an alternating manner. The pump is configured to provide positive pressure and negative pressure. The manifold assembly is fluidly connected to the first airbag, the second airbag and the pump. The manifold assembly includes a manifold core having a bonding surface, and the bonding surface defines holes that are fluidly connected to an inlet pipe, an outlet pipe, a first protrusion and a second protrusion, respectively. The connector defines a first passage area, a second passage area and a release notch. The motor is configured to rotate the connector relative to the manifold core. The controller is connected to the pump and the motor in communication. The controller is configured to: activate the motor to rotate the connector to fluidly connect the inlet pipe to the first protrusion and the outlet pipe to the second protrusion in at least one operating state; and activate the motor to rotate the connector to align the release notch with the hole that is fluidly connected to the first protrusion and the second protrusion in the release state.

[0006] These and other features, advantages and objects of the present disclosure will be further understood and appreciated by those skilled in the art by referring to the following description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In the attached picture:

[0008] Figure 1 is a side perspective view of a manifold assembly according to the present disclosure;

[0009] Figure 2 is a side perspective exploded view of a manifold assembly according to the present disclosure;

[0010] Figure 3 is a side perspective view of a housing for an electric machine of a manifold assembly according to the present disclosure;

[0011] Figure 4 is a side perspective partially exploded view of a manifold assembly according to the present disclosure;

[0012] Figure 5 is a bottom perspective view of a connector of a manifold assembly according to the present disclosure;

[0013] Figure 6 is a top perspective view of a connector for a manifold assembly according to the present disclosure;

[0014] Figure 7 is taken at region VII according to the present disclosure Figure 6 An enlarged top plan view of the connector of , showing the locating pin engaging the end of the drive shaft;

[0015] Figure 8 is a side perspective view of a manifold core for a manifold assembly according to the present disclosure;

[0016] Fig. 9It is intercepted at line IX-IX of the present disclosure Figure 8 A cross-sectional view of a manifold core;

[0017] Fig.10 is a side perspective view of a manifold core for a manifold assembly according to the present disclosure;

[0018] Fig.11 is a top perspective view of a pneumatic housing for a pneumatic system including a pump and a manifold assembly according to the present disclosure;

[0019] Fig.12 is a top plan view of a manifold assembly according to the present disclosure having a connector in a first position for a first operating state;

[0020] Fig.13 is a top plan view of a manifold core according to the present disclosure showing an access area from a connector in a first position for a first operational state;

[0021] Fig.14 is a top plan view of a manifold assembly according to the present disclosure having a connector in a second position for a released state;

[0022] Fig.15 is a top plan view of a manifold core according to the present disclosure showing an access area of ​​a connector from a second position for a released state;

[0023] Fig.16 is a side perspective view of a manifold assembly according to the present disclosure with a connector and a manifold core partially cut away to illustrate the airflow path;

[0024] Fig.17 is a top plan view of a manifold assembly according to the present disclosure having a connector in a third position for a second operating state;

[0025] Fig.18 is a top plan view of a manifold core according to the present disclosure showing an access area from a connector in a third position for a second operating state;

[0026] Fig.19 is a side perspective view of a manifold assembly according to the present disclosure with a connector and a manifold core partially cut away to illustrate the airflow path;

[0027] Fig. 20 is a top plan view of a manifold assembly according to the present disclosure having a connector in a fourth position for a released state;

[0028] Fig.21is a top plan view of a manifold core according to the present disclosure showing an access area of ​​a connector from a fourth position for a released state;

[0029] Fig. 22 is a top plan view of a manifold assembly according to the present disclosure having a connector in a fifth position for a first operational state;

[0030] Fig.23 is a top plan view of a manifold assembly according to the present disclosure having a connector in a sixth position for a release state;

[0031] Fig.24 is a top plan view of a manifold assembly according to the present disclosure having a connector in a seventh position for a second operating state;

[0032] Fig.25 is a top plan view of a manifold assembly according to the present disclosure having a connector in an eighth position for a released state;

[0033] Fig.26 is a schematic diagram of a surface assembly having a therapeutic layer in communication with a pneumatic housing according to the present disclosure;

[0034] Fig. 27 is a schematic diagram of a surface assembly according to the present disclosure, the surface assembly having a pneumatic housing in communication with a first airbag and a second airbag;

[0035] Fig.28 is a top perspective view of an airbag base according to the present disclosure, the airbag base being used to support an airbag of a pneumatic system;

[0036] Fig.29 is a top perspective view of a therapeutic layer according to the present disclosure with a first balloon in a compressed state and a second balloon in an expanded state;

[0037] Fig.30 According to the present disclosure Fig.29 A top perspective view of a treatment layer of the invention, with the first balloon in an expanded state and the second balloon in a compressed state;

[0038] Fig.31 is a schematic diagram of a pneumatic system according to the present disclosure, with a first airbag in an expanded state and a second airbag in a compressed state;

[0039] Fig.32 is a side perspective view of an airbag for a pneumatic system according to the present disclosure;

[0040] Fig.33 is a graph showing balloon pressure during one cycle of alternating low pressure therapy according to the present disclosure;

[0041] Fig.34 is a graph showing balloon pressure during one rotation of a connector during alternating low pressure therapy according to the present disclosure;

[0042] Fig.35 is a block diagram of a pneumatic system in communication with a support device according to the present disclosure; and

[0043] Fig.36 is a side perspective view of a support device according to the present disclosure. DETAILED DESCRIPTION

[0044] The embodiment shown in the drawings is a combination of method steps and device components related to the manifold assembly. Accordingly, the drawings use conventional symbols to represent device components and method steps as appropriate, and only show specific details related to understanding the embodiments of the present disclosure, so as to avoid confusing the subject matter of the present disclosure by reciting details that will be understood by ordinary technicians in the field after reading the specification. In addition, similar reference numerals in the specification and drawings represent similar elements.

[0045] For the purpose of this specification, the terms "upper", "lower", "left", "right", "front", "rear", "horizontal", "vertical" and their derivatives shall refer to Figure 1 The disclosure shown. The term "front" shall refer to the surface closest to the intended viewer and the term "rear" shall refer to the surface farthest from the intended viewer, unless otherwise stated. However, it should be understood that the disclosure may assume various alternative orientations, unless otherwise expressly provided. It should also be understood that the specific structures and processes shown in the drawings and described in the specification are merely exemplary embodiments of the inventive concepts defined by the appended claims. Therefore, specific dimensions and other physical characteristics related to the embodiments of the present disclosure should not be viewed in a limiting sense unless otherwise expressly stated in the claims.

[0046] The terms "includes", "comprising" or any other variations thereof are intended to cover a non-exclusive inclusion, i.e., a process, method, article, or apparatus that comprises a list of elements includes not only those elements but may also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Elements followed by "includes...", without more limitations, do not exclude the existence of other identical elements in those processes, methods, articles, or apparatuses that constitute such elements.

[0047] Reference Figures 1 to 36, reference numeral 10 generally designates a manifold assembly 10, which includes a manifold core 12 having an inlet tube 14 configured to define a portion of a positive pressure path, an outlet tube 16 configured to define a portion of a negative pressure path, a first protrusion 18 configured to be fluidly coupled to a first airbag 20, and a second protrusion 22 configured to be fluidly coupled to a second airbag 24. A connector 26 is operably coupled to the manifold core 12. The connector 26 defines a first passage area 28, a second passage area 30, and a first release notch 32 and a second release notch 34. A motor 36 is operably coupled to the connector 26 through the manifold core 12 to rotate the connector 26 relative to the manifold core 12. The motor 36 is configured to rotate the connector 26 to a first position 38 to fluidly couple the outlet tube 16 to the first protrusion 18 via the first passage area 28 and to fluidly couple the inlet tube 14 to the second protrusion 22 via the second passage area 30. The motor 36 is also configured to rotate the connector 26 in the first direction to a second position 40 to fluidly couple the first protrusion 18 with the first release notch 32 and to fluidly couple the second protrusion 22 with the second release notch 34. The motor 36 is further configured to rotate the connector 26 in the first direction to a third position 42 to fluidly couple the outlet tube 16 with the second protrusion 22 via the first passage area 28 and to fluidly couple the inlet tube 14 with the first protrusion 18 via the second passage area 30.

[0048] Reference Figure 1 and Figure 2 The manifold assembly 10 is configured to direct and guide fluid based on the position of the connector 26 relative to the manifold core 12. The manifold assembly 10 includes a housing 60 for accommodating the motor 36, the manifold core 12 coupled to the housing 60, the connector 26 operably coupled to the manifold core 12 and driven by the motor 36, a biasing member 62 for biasing the manifold core 12 toward the connector 26, and an optical switch 64 for sensing the position of the connector 26.

[0049] Still refer to Figure 1 and Figure 2 as well as Figure 3 , the housing 60 is generally cylindrical in shape and has an open end 66 for receiving the motor 36. The opposite end of the housing 60 is a support end 68, which is configured to support components of the manifold assembly 10 and is a substantially closed end of the housing 60. The housing 60 includes a support member 70 extending from the open end 66 and extending beyond the support end 68, and the support member 70 includes support members 70A-70D. The support member 70 provides enhanced strength to the manifold assembly 10 and assists in positioning the manifold core 12 and the connector 26. The support members 70A-70C define a space for receiving and retaining the manifold core 12 and the connector 26.

[0050] When the manifold assembly 10 is assembled, the supports 70A, 70B, 70C generally extend the same length from the housing 60 and extend beyond the connector 26. The support 70D extends a shorter length from the housing 60 than the supports 70A-70C. Generally, the support 70D assists in positioning and aligning the manifold core 12 as described herein.

[0051] The support end 68 of the housing 60 includes a protruding area 72 that is configured to engage the biasing member 62. The housing 60 also includes a protrusion 74 outside of the protruding area 72 and on the support end 68. The protrusion 74 is configured to engage a tab 76 of the manifold core 12.

[0052] The support end 68 of the housing 60 defines a central opening 88 through which a drive shaft 92 operably coupled to the motor 36 is configured to extend. The motor assembly 90 includes the motor 36, a gearbox 94, the drive shaft 92, and an electrical connector 96 configured to engage a control assembly 98. The motor 36 and the gearbox 94 are disposed within the housing 60, while the drive shaft 92 and the electrical connector 96 extend through or out of the housing 60. The motor 36 is coupled to the housing 60 via fasteners 100.

[0053] Refer again Figure 1 and Figure 2 as well as Figure 4 , the drive shaft 92 extends through the central opening 88, through the biasing member 62, through the manifold core 12, and through the connector 26. The motor 36 drives the rotation of the drive shaft 92, which in turn drives the rotation of the connector 26, as described herein. In various embodiments, the motor 36 is configured as a stepper motor 36, which is configured to rotate the connector 26 to a specific position.

[0054] The motor 36 may control the functions of the manifold assembly 10 by rotating the connector 26. The motor 36 is generally configured to drive rotation of the connector 26 in a single direction, but may rotate both clockwise and counterclockwise without departing from the teachings herein.

[0055] The manifold assembly 10 also includes a biasing member 62 that biases the manifold core 12 toward the connector 26 to maintain engagement between the manifold core 12 and the connector 26. Figure 2 In the example shown, the biasing member 62 is configured as a coil spring 62. The spring 62 has a conical shape, with a width that increases as the spring 62 extends away from the housing 60. As such, the width of the spring 62 near the housing 60 is less than the width near the manifold core 12. The conical shape of the spring 62 allows for greater compression of the spring 62 to minimize the space between the housing 60 and the manifold core 12 and provide a more compact manifold assembly 10.

[0056] In various aspects, the spring 62 is coupled to the support end 68 of the housing 60, extends through the manifold core 12, and engages the connector 26. The spring 62 extending through the manifold core 12 can be advantageous for properly aligning the manifold core 12 relative to the housing 60 and maintaining that alignment. Additionally, the engagement between the connector 26 and the biasing member 62 may not substantially impede rotation of the connector 26 relative to the manifold core 12. For example, the connector 26 can define an internal passage through which the biasing member 62 extends, thereby allowing rotation of the connector 26 relative to the biasing member 62 while providing a biasing force to the connector 26.

[0057] Reference Figure 1 and Figure 2 , the manifold assembly 10 also includes an optical switch 64 connected to an extension 102 of the manifold core 12 via a fastener 100. The extension 102 is positioned on and supported by the support 70D. Thus, the support 70D assists in positioning the manifold core 12 relative to the housing 60. The optical switch 64 is disposed proximate an engagement surface 110 of the manifold core 12, the engagement surface 110 being configured to abut and engage the connector 26. The optical switch 64 has an electrical connector 112 for coupling the optical switch 64 to the control assembly 98. The optical switch 64 is configured to sense a position of the connector 26 and communicate the position to the control assembly 98.

[0058] Still refer to Figure 1 and Figure 2 as well as Figure 5 The motor 36 is configured to adjust the connector 26 to certain predefined positions 38-42, 120-128 ( Figures 12 to 25 ), the optical switch 64 can confirm or verify the position of the connector 26. The connector 26 includes a reference notch 140 defined in an outer edge 142 of the connector 26. The optical switch 64 is configured to sense the position of the reference notch 140. The optical switch 64 can be advantageous for verifying the position of the connector 26 and maintaining the accuracy of the position of the connector 26. Maintaining the accuracy of the positioning of the connector 26 can maximize the efficiency of the fluid (i.e., airflow) through the manifold core 12. In addition, the reference notch 140 and the optical switch 64 are configured to provide a zero reference point for adjusting the connector 26 to each predefined position 38-42, 120-128.

[0059] Refer again Figure 4 as well as Figures 5 to 7, the connector 26 is rotatably coupled to the manifold core 12. Typically, the engagement between the manifold core 12 and the connector 26 is an airtight engagement, which can be accomplished using a sealant 144 and the biasing force of the biasing member 62. The sealant 144 is a grease that is typically disposed between two coupled components, such as the manifold core 12 and the connector 26. The grease provides an airtight engagement while reducing the number of components in the manifold assembly 10, which can be advantageous for increasing the useful life of the manifold assembly 10 and providing a more compact manifold assembly 10. The grease also provides a sliding engagement between the manifold core 12 and the connector 26 while maintaining an airtight seal.

[0060] The connector 26 is configured to rotate about an axis of rotation 150 that is substantially perpendicular to the direction of fluid flow through the manifold core 12. The position of the connector 26 determines the flow path of the fluid through the manifold core 12. The connector 26 may be a cover, plate, cap, valve, slotted valve, disk, valve disk, or any other feature configured to be rotated by the motor 36 and direct fluid through the manifold assembly 10.

[0061] The connector 26 generally has a circular shape that substantially mirrors the shape of the manifold core 12 and can rotate within the space defined by the support 70 of the housing 60. The inside of the connector 26 includes an abutment surface 152 of the connector 26 that is configured to engage the manifold core 12. The abutment surface 152 is configured to slidingly engage the engagement surface 110 of the manifold core 12 when the connector 26 is rotated by the motor 36.

[0062] The inner side of the connector 26 includes a central portion 154 offset from the outer edge 142. Generally, the central portion 154 protrudes relative to the outer edge 142. The connector 26 defines a central hole 156 in the central portion 154, and the drive shaft 92 extends through the central hole 156. The central portion 154 defines a first passage area 28 and a second passage area 30, which are generally defined as arcuate areas or parabolic areas. The first passage area 28 and the second passage area 30 are generally recessed areas relative to the abutment surface 152 and are configured to form a channel with the engagement surface 110 when the connector 26 abuts the manifold core 12. The passage areas 28, 30 are generally mirror images of each other on the first central axis 158. One passage area 28, 30 is defined on each side of the first central axis 158. In addition, each passage area 28, 30 is symmetrical on the second central axis 160, and the second central axis 160 is generally perpendicular to the first central axis 158.

[0063] Reference Figures 5 to 7, the connector 26 further defines a first release recess 32 and a second release recess 34 and a third release recess 170 and a fourth release recess 172. The release recesses 32, 34, 170, 172 are defined along the periphery of the central portion 154. The release recesses 32, 34, 170, 172 are recessed areas relative to the surface of the abutment surface 152 to the outer edge 142. The depth of the release recesses 32, 34, 170, 172 is less than the depth of the channel areas 28, 30 relative to the abutment surface 152. The surface in the recessed release recesses 32, 34, 170, 172 is generally coplanar with the surface of the outer edge 142.

[0064] The release notches 32, 34, 170, 172 are defined approximately 90° from one another along the periphery of the central portion 154. Using the central axes 158, 160, the release notches 32, 34, 170, 172 are defined on one of the central axes 158, 160, respectively. Thus, the first release notch 32 and the second release notch 34 are diametrically opposed to one another and are disposed along the first central axis 158. The third release notch 170 and the fourth release notch 172 are diametrically opposed to one another and are disposed along the second central axis 160.

[0065] The passage regions 28, 30 extend between adjacent release notches 32, 34, 170, 172. For example, the first passage region 28 extends from between the first release notch 32 and the third release notch 170, around the third release notch 170, to between the second release notch 34 and the third release notch 170. The second passage region 30 extends from between the first release notch 32 and the fourth release notch 172, around the fourth release notch 172, to between the second release notch 34 and the fourth release notch 172. The configuration of the release notches 32, 34, 170, 172 and the passage regions 28, 30 allows the connector 26 to be rotated to different predefined positions 38-42, 120-128 and adjust the airflow through the manifold core 12. Typically, a reference notch 140 providing a zero reference point is defined between the first release notch 32 and the fourth release notch 172 near the end of the second passage region 30.

[0066] The outside of the connector 26 includes raised areas corresponding to the release notches 32, 34, 170, 172 and the passage areas 28, 30. These raised areas are defined within a raised boundary 174, which is generally aligned with the center portion 154. The connector 26 includes two raised supports 176, 178 extending within the raised boundary 174. The first raised support 176 extends along the first center axis 158 between the raised areas corresponding to the first release notch 32 and the second release notch 34. The second raised support 178 extends along the second center axis 160 between the raised areas corresponding to the third release notch 170 and the fourth release notch 172.

[0067] The first and second raised support members 176, 178 are respectively coupled to guide members 180, which form raised walls around the central hole 156. The guide members 180 also extend along the second central axis 160. The guide members 180 extend to or beyond the protruding areas corresponding to the passage areas 28, 30 to form elongated thickened areas. The guide members 180 define grooves 182, which extend on both sides of the central hole 156 along the second central axis 160. The grooves 182 include grooves 182A, which are on opposite sides of the central hole 156 relative to the grooves 182B.

[0068] Refer again Figure 4 And still refer to Figure 6 and Figure 7 , the manifold assembly 10 includes a locating pin 190 that holds the connector 26 in engagement with the manifold core 12. The locating pin 190 is configured to be disposed within a groove 182 defined by a guide 180 on the connector 26. The locating pin 190 is configured to extend through the drive shaft 92 and be located in the groove 182 to couple the drive shaft 92 and, thus, the motor 36 to the connector 26. Thus, the motor 36 drives the rotation of the drive shaft 92, and the locating pin 190 transfers the rotation from the drive shaft 92 to the connector 26. In addition, the biasing force from the biasing member 62 assists in holding the locating pin 190 within the groove 182. The biasing force biases the manifold core 12 toward the connector 26 and, thus, the connector 26 toward the locating pin 190.

[0069] Reference Figures 8 to 10 The manifold core 12 directs the fluid, which is typically air, based on the position of the connector 26 (see Figures 12 to 25 ). The manifold core 12 defines a central bore 192 configured to receive the drive shaft 92. The manifold core 12 includes an inlet pipe 14, an outlet pipe 16, and a first protrusion 18 and a second protrusion 22. The inlet pipe 14 and the outlet pipe 16 are configured to be in fluid communication with a pump 194 ( Fig.11 ), the first protrusion 18 and the second protrusion 22 are configured to be in fluid communication with the first airbag 20 and the second airbag 24, respectively. Therefore, the manifold assembly 10 is configured to guide airflow between the pump 194 and the first airbag 20 and the second airbag 24.

[0070] The outlet tube 16 and the first and second protrusions 18 and 22 are disposed on one side of the central axis 196 of the manifold core 12, extending from the manifold core 12 in a first direction, while the inlet tube 14 is disposed on the opposite side, extending from the manifold core 12 in a second opposite direction. Typically, the inlet tube 14 and the outlet tube 16 are disposed diametrically opposite to each other. The outlet tube 16 and the first and second protrusions 18 and 22 are configured to be arranged linearly along the side of the manifold core 12. Each protrusion 18, 22 and tube 14, 16 extends to a similar distance from the manifold core 12.

[0071] The engagement surface 110 of the manifold core 12 defines four holes 200-206, which are in fluid communication with the tubes 14, 16 and the protrusions 18, 22, respectively. Thus, the first hole 200 is in fluid communication with the first protrusion 18, the second hole 202 is in fluid communication with the inlet tube 14, the third hole 204 is in fluid communication with the second protrusion 22, and the fourth hole 206 is in fluid communication with the outlet tube 16. Fig. 9 As shown, holes 200-206 extend into manifold core 12 to engage the airflow passages of tubes 14, 16 and protrusions 18, 22, respectively, to provide an airflow passage through manifold core 12. As described herein, the airflow passages may be in fluid communication with each other not through manifold core 12 but via the space between connector 26 and manifold core 12.

[0072] The holes 200-206 are generally defined about 90° from each other around the manifold core 12. The first hole 200 and the third hole 204 are diametrically opposed to each other, and the second hole 202 and the fourth hole 206 are diametrically opposed to each other. The first hole 200 and the third hole 204 are located on the central axis 196.

[0073] like Fig.10 As shown, toward the housing 60 ( Figure 1 ) oriented manifold core 12 is substantially hollow. The inner side includes projections 210 defining airflow channels and support structures 212 extending from each projection 210 to a center guide 214 of the drive shaft 92. The substantially hollow manifold core 12 can provide a more efficient manufacturing process. In addition, the substantially hollow manifold core 12 can reduce the weight of the manifold assembly 10, which is useful for reducing the number of surface components 220 ( 220 ) carrying the manifold assembly 10 that can be transported or adjusted by a caregiver. Fig.26 ) weight may be advantageous.

[0074] Reference Figures 11 to 25, the manifold assembly 10 is included in a pneumatic system 222, which also includes a pump 194, a control assembly 98, and a first airbag 20 and a second airbag 24. Tubes 224, 226 extend between the pump 194 and the manifold assembly 10, respectively, and other tubes 228, 230 extend between the manifold assembly 10 and the first airbag 20 and the second airbag 24, respectively. The pump 194 is configured to direct air through the manifold assembly 10. The pump 194 is configured to simultaneously provide a positive pressure to direct air into one of the first airbag 20 and the second airbag 24 and provide a negative pressure to draw air from the other of the first airbag 20 and the second airbag 24.

[0075] The pump 194 includes an inlet port 240 configured to draw air into the pump 194 and provide a negative pressure or vacuum and an outlet port 242 configured to drive air into the airbags 20, 24 and provide a positive pressure. The pump 194 is configured to simultaneously drive fluid through the manifold assembly 10 to one set of airbags 20, 24 and draw fluid through the manifold assembly 10 from another set of airbags 20, 24.

[0076] The outlet port 242 of the pump 194 is coupled to the inlet tube 14 of the manifold core 12 via the conduit 224. A positive pressure path is then defined from the pump 194, through the conduit 224, through the manifold assembly 10 via the inlet tube 14, through one of the conduits 228, 230, and into one of the first and second airbags 20, 24. The inlet port 240 of the pump 194 is coupled to the outlet tube 16 of the manifold core 12 via the conduit 226. A negative pressure path is defined from one of the first and second airbags 20, 24, through one of the conduits 228, 230, through the outlet tube 16, through the manifold core 12, through the conduit 226, and to the pump 194 via the inlet port 240.

[0077] Reference Figures 11 to 25 , the position 38-42, 120-128 of the connector 26 relative to the manifold core 12 changes the direction of the airflow through the manifold assembly 10. The airflow can be directed from the airbags 20, 24 to the pump 194, from the pump 194 to the airbags 20, 24, from the surrounding area to the airbags 20, 24, from the airbags 20, 24 to the surrounding area, or a combination thereof. Because the pump 194 is configured to provide both positive and negative pressures simultaneously, the air is configured to flow through the manifold assembly 10 in both directions simultaneously. In addition, the air is configured to be directed to or from the surrounding area simultaneously.

[0078] The manifold assembly 10 is operable between a first operating state, a second operating state, and a released state. In the first operating state, i.e., the pressurized operating state, the pump 194 is configured to draw air from the first bladder 20 and direct the air into the second bladder 24. In the second operating state, i.e., the pressurized operating state, the pump 194 is configured to direct air into the first bladder 20 and draw air from the second bladder 24. In the released state, the first bladder 20 and the second bladder 24 are in fluid communication with the surrounding area instead of the pump 194. Thus, the bladders 20, 24 are not in communication with the pump 194 in the released state. The fluid communication between the bladders 20, 24 and the surrounding area allows the bladders 20, 24 to return to a non-pressurized state, typically at atmospheric pressure or an equilibrium state. The position of the connector 26, and thus the position of the passage areas 28, 30 and the release notches 32, 34, 170, 172 relative to the manifold core 12, determines whether the manifold assembly 10 is in the first operating state, the second operating state, or the released state.

[0079] Reference Figure 12 to Figure 14 , the connector 26 is disposed in a first position 38, which is part of the first pressurized operating state. The first position 38 is also a zero reference position relative to the optical switch 64. The connector 26 is positioned to fluidly couple the outlet tube 16 to the first protrusion 18 via the second pathway region 30, and thereby to the first airbag 20, to extract air from the first airbag 20. In the first position 38, the inlet tube 14 is fluidly coupled to the second protrusion 22 via the first pathway region 28 to direct air to the second airbag 24. Accordingly, the first airbag 20, which is fluidly coupled to the first protrusion 18, is compressed, while the second airbag 24, which is fluidly coupled to the second protrusion 22, is expanded. In this way, the negative pressure path (i.e., vacuum) is partially defined by the first protrusion 18, the second pathway region 30, and the outlet tube 16, and the positive pressure path is partially defined by the inlet tube 14, the first pathway region 28, and the second protrusion 22.

[0080] Reference Figures 14 to 16 , the connector 26 is shown in a second position 40, which is part of the released state. The connector 26 is configured to move from the first position 38 ( Fig.12 ) to the second position 40 is rotated approximately 45° in a first direction (illustrated as counterclockwise). In the released state, the airbags 20, 24 are not in fluid communication with the inlet tube 14 and the outlet tube 16 and thus with the pump 194, but are in fluid communication with the surrounding area (e.g., atmosphere). The released state allows the airbags 20, 24 to be adjusted from a pressurized state to a non-pressurized state.

[0081] In the second position 40, the first release notch 32 is positioned above the first hole 200, which is associated with the first protrusion 18, which is in fluid communication with the first airbag 20. The second release notch 34 is positioned above the third hole 204, which is associated with the second protrusion 22, which is in fluid communication with the second airbag 24. The release notches 32, 34 provide an opening to the surrounding environment to exhaust or discharge air from the second airbag 24, which is in a positive pressure state when the connector 26 is in the first position 38, and to add air to the first airbag 20, which is in a negative pressure state when the connector 26 is in the first position 38. In this way, in the released state, the negative airflow path increases to balance and the positive pressure path decreases to balance. Accordingly, the previously compressed first airbag 20 increases in size or inflates, while the previously inflated second airbag 24 decreases in size or deflates.

[0082] In an exemplary airflow path through the manifold assembly 10, as shown in FIG. Fig.16 , illustrating an airflow path between the second protrusion 22 and the surrounding area. In the first position 38, air directed along the positive pressure path and entering the second airbag 24 inflates the second airbag 24. Accordingly, in the second position 40, air is configured to be discharged from the second airbag 24, causing the second airbag 24 to deflate. The air flows through the inner channel defined by the second protrusion 22 and flows through the third hole 204 defined by the manifold core 12. The air then flows within the second release recess 34 between the connector 26 and the engagement surface 110 of the manifold core 12 and is discharged to the external area. The recessed nature of the release recess 34 relative to the surface of the central portion 154 of the connector 26 provides a space between the connector 26 and the manifold core 12 to communicate with the surrounding fluid. In addition, when the airbags 20, 24 are in a compressed state under a vacuum by extracting air from the airbags 20, 24 along the negative pressure path, the air flows through the opening between the release recess 34 and the engagement surface 110 to communicate with the surrounding fluid. Fig.16 The airbags 20, 24 are entered in opposite directions as shown.

[0083] Reference Figures 17 to 19 , the connector 26 is in a third position 42, which is part of the second pressurized operating state. The third position 42 is approximately 90° away from the first position 38 and approximately 45° away from the second position 40 in a first direction (e.g., counterclockwise). In the third position 42, the airflow path is reversed relative to the first position 38. The inlet tube 14 is in fluid communication with the first protrusion 18 via the first passage area 28, and the outlet tube 16 is in fluid communication with the second protrusion 22 via the second passage area 30. In this way, the positive pressure path is defined by the inlet tube 14, the first path area 28 and the first protrusion 18, and the negative pressure path is defined by the outlet tube 16, the second path area 30 and the second protrusion 22. Accordingly, the first airbag 20 is expanded by positive pressure, and the second airbag 24 is compressed by negative pressure.

[0084] In an exemplary airflow path through the manifold assembly 10, as shown in FIG. Fig.19 , illustrating the airflow path between the second protrusion 22 and the outlet tube 16. The air flows through the inner passage defined by the second protrusion 22, and flows through the third hole 204 defined by the manifold core 12. The air then flows through the passage defined between the first passage area 28 defined by the connector 26 at the engagement surface 110 of the manifold core 12. The air flows through the fourth hole 206, through the inner passage defined by the outlet tube 16, and flows to the pump 194.

[0085] Reference Figure 20 to Figure 21 , the connector 26 is rotated in the first direction to a fourth position 120, the fourth position 120 being approximately 45° from the third position 42 and approximately 135° from the first position 38 (i.e., the zero reference position). The fourth position 120 is part of the release state, aligning the holes 200, 204 associated with the first protrusion 18 and the second protrusion 22 with the third release recess 170 and the fourth release recess 172. The release recesses 170 and 172 allow the pressurized path to return to equilibrium. Based on the third position 42, when the connector 26 is rotated to the fourth position 120, the positive pressure path in the first protrusion 18 is reduced to equilibrium, thereby deflating the first airbag 20, while the negative pressure path in the second protrusion 22 is raised to equilibrium, thereby inflating the second airbag 24.

[0086] Refer again Figures 12 to 21 , the connector 26 rotates from the first position 38 to the fourth position 120 to complete a single cycle for fluidly connecting the airbags 20, 24 to the manifold assembly 10. In this way, each airbag 20, 24 has experienced a compressed state under a vacuum state, a roughly balanced neutral state, an expanded state under a positive pressure state, and then a neutral state. When in the first pressurized operating state, the first airbag 20 is in a compressed state and the second airbag 24 is in an expanded state. In the second pressurized operating state, the first airbag 20 is in an expanded state and the second airbag 24 is in a compressed state. In the released state, the first airbag 20 and the second airbag 24 are respectively adjusted to and maintained in a neutral state.

[0087] Refer again Figure 22 to Figure 25 , by completing a single rotation of the connector 26, returning the connector 26 to the zero reference position (i.e., the first position 38), the airbags 20, 24 are adjusted through two complete movement cycles. The connector 26 is configured to rotate to the position as shown in FIG. Fig. 22 The fifth position 122 shown, Fig.23 The sixth position 124 shown, Fig.24 The seventh position 126 shown and Fig.25 The eighth position 128 is shown.

[0088] like Fig. 22As shown, the fifth position 122 is part of the first pressurized operating state. The connector 26 is rotated in the first direction, about 45° from the fourth position 120 and about 180° from the first position 38. The inlet tube 14 is fluidly coupled to the second protrusion 22 via the second passage area 30 to adjust the second airbag 24 to the expanded state. The outlet tube 16 is fluidly coupled to the first protrusion 18 via the first passage area 28 to adjust the first airbag 20 to the compressed state.

[0089] like Fig.23 As shown, the sixth position 124 is part of the release state. The connector 26 is rotated in the first direction, approximately 45° from the fifth position 122 and approximately 225° from the first position 38. The first release notch 32 and the second release notch 34 are aligned with the first hole 200 and the third hole 204, respectively, which are associated with the first protrusion 18 and the second protrusion 22. Air is exhausted from the second air bag 24, returning the second air bag 24 to the neutral state. Air flows into the first air bag 20, returning the first air bag 20 to the neutral state.

[0090] exist Fig.24 In the seventh position 126 shown, the manifold assembly 10 is in a second pressurized operating state. The connector 26 is rotated in the first direction, approximately 45° from the sixth position 124 and approximately 270° from the first position 38. The inlet tube 14 is fluidly coupled to the first protrusion 18 via the second passage area 30 to adjust the first airbag 20 to an expanded state. The outlet tube 16 is fluidly coupled to the second protrusion 22 via the first passage area 28 to adjust the second airbag 24 to a compressed state.

[0091] like Fig.25 As shown, the eighth position 128 is part of the release state. The connector 26 is rotated in the first direction, approximately 45° from the seventh position 126 and approximately 315° from the first position 38. The third release notch 170 and the fourth release notch 172 are aligned with the first hole 200 and the third hole 204, respectively, which are associated with the first protrusion 18 and the second protrusion 22. Air is exhausted from the first air bag 20 to return the first air bag 20 to the neutral state. Air flows into the second air bag 24 to return the second air bag 24 to the neutral state. Accordingly, when the cover rotates 360° for a single rotation of the connector 26, the air bags 20, 24 have completed two complete movement cycles in three different states.

[0092] Reference Fig.26 and Fig. 27, the pneumatic system 222 is included in the surface assembly 220, which may also be referred to as a mattress or therapeutic mattress. The surface assembly 220 generally includes a cover 250 defining an interior 252. Typically, the cover 250 is a mattress cover, which may be composed of a flexible material that can be easily cleaned.

[0093] The surface assembly 220 includes a support base 254, which can be constructed of foam to provide support and structure to the surface assembly 220. The support base 254 can be generally U-shaped to hold the various therapeutic elements within a central region of the surface assembly 220. A pneumatic housing 256 including the pump 194, the manifold assembly 10, and the control assembly 98 is positioned within the support base 254. An intermediate support layer 258 is disposed around the pneumatic housing 256 within the U-shaped support base 254. The intermediate support layer 258 is generally constructed of foam and provides additional support to the surface assembly 220 for supporting a patient. In some aspects, the intermediate support layer 258 can provide an additional layer between the patient and the pneumatic housing 256.

[0094] The balloons 20, 24 are disposed within a therapeutic layer 260 positioned above the intermediate support layer 258 and within the U-shaped support base 254. The therapeutic layer 260 may extend along the entire length of the surface assembly 220. It is understood that portions of the therapeutic layer 260 may not include balloons 20, 24, such as portions aligned with the patient's head region. The conduits 228, 230 extend through the intermediate support layer 258 to engage the balloons 20, 24 in the therapeutic layer 260.

[0095] Still refer to Fig.26 and Fig. 27 as well as Figures 28 to 30 , the treatment layer 260 of the surface assembly 220 includes a balloon base 270 for supporting and holding the balloons 20, 24. The balloon base 270 provides a single surface, and each of the balloons 20, 24 is disposed on the surface. The balloon base 270 includes an attachment strap 272 for coupling the treatment layer 260 to the support base 254 and / or the cover 250 below the support base 254.

[0096] In the illustrated embodiment, the therapeutic layer 260 includes twelve balloons 20, 24, with six first balloons 20 and six second balloons 24. A retaining band 274 is coupled to the balloon base 270 to hold the balloons 20, 24 in place along the balloon base 270. The retaining bands 274 are arranged in twelve rows for the twelve balloons 20, 24, and in three columns, meaning that each balloon 20, 24 is secured by three retaining bands 274. The three retaining bands 274 on each balloon 20, 24 are generally spaced apart, one at each end of the respective balloon 20, 24 and one in the middle. The retaining bands 274 assist in reducing torsion of the balloons 20, 24, which may be caused by pressure changes within the balloons 20, 24. Reducing torsion of the balloons 20, 24 may be beneficial for increasing comfort for the patient. The retaining bands 274 may be configured to expand with the balloons 20, 24 in the expanded state. Additionally, the retaining straps 274 may define the size and shape of the air bags 20 , 24 in the inflated state.

[0097] Each side of the balloon base 270 includes an inlet connector 276A, 276B. The inlet connectors 276A, 276B are respectively configured to engage the conduits 228, 230 extending from the manifold assembly 10. The inlet connector 276A for the first balloon 20 is disposed on one side of the balloon base 270, while the inlet connector 276B for the second balloon 24 is disposed on the opposite side of the balloon base 270. This allows the conduits 228 for the first balloon 20 and the conduits 230 for the second balloon 24 to be disposed on opposite sides of the therapeutic layer 260, which may be advantageous for reducing interference (e.g., kinking, etc.) with the conduits 228, 230.

[0098] Each inlet connector 276A, 276B is in fluid communication with a set of feed connectors 278, 280, respectively. The feed connectors 278, 280 are configured to fluidly couple the corresponding inlet connectors 276A, 276B with the corresponding airbags 20, 24. Additional conduits 282, 284 extend between the inlet connectors 276A, 276B and the associated set of feed connectors 278, 280, respectively. In an example with twelve airbags 20, 24, there are six feed connectors 278 on one side of the airbag base 270 coupled to the six first airbags 20, and six feed connectors 280 on the opposite side of the airbag base 270 coupled to the six second airbags 24.

[0099] Reference Figures 26 to 30, the treatment layer 260 is in fluid communication with the control assembly 98. The balloon base 270 includes two measurement ports 286, 288, one on each side of the balloon base 270. Each measurement port 286, 288 is in fluid communication with a corresponding inlet connector 276A, 276B and a corresponding feed connector 278, 280 on the same side of the balloon base 270. The measurement ports 286, 288 are connected to the sensor tube 292 (see Fig.11 ) is in fluid communication with the sensor 290 to sense pressure during operation of the pneumatic system 222 and transmit the sensed pressure to the control assembly 98 for monitoring. The control assembly 98 can be configured to generate and transmit an alarm when the sensed pressure exceeds a predetermined range based on the operation of the pneumatic system 222.

[0100] The treatment layer 260 with air cells 20, 24 can also be used with other treatment devices and components. For example, the air cell base 270 defines an opening 294 to connect a microclimate management (MCM) system to the control assembly 98 below the treatment layer 260. The MCM system can be selectively disposed above the treatment layer 260 and positioned on the treatment layer 260. The MCM system typically includes a blower, a top bed cover, and a spacing material within the top bed cover. The blower operates to guide or blow air through the spacing material. The patient can lie on the MCM system, and when the patient is positioned on the MCM system, the air is guided through the top bed cover. The structure quickly draws moisture away from the patient's skin by blowing air under the patient, which helps prevent skin diseases that may be caused by lying on the surface assembly 220 for a long time.

[0101] Still refer to Fig.29 and Fig.30 as well as Fig.31 and Fig.32 The pneumatic system 222 is configured to provide alternating low pressure (ALP) therapy to the patient. In this way, the first and second airbags 20, 24 are adjusted in alternating cycles, the first airbag 20 is compressed while the second airbag 24 is expanded, and the first airbag 20 is expanded while the second airbag 24 is compressed. The adjustment of the airbags 20, 24 is based on the position of the connector 26 of the manifold assembly 10 as described herein.

[0102] The pump 194 is fluidly coupled to the airbags 20, 24 within the surface assembly 220 via the manifold assembly 10 and conduits 224, 226. The airbags 20, 24 are arranged in two groups, with the first airbags 20 alternating with the second airbags 24. It is contemplated that multiple groups of first airbags 20 and second airbags 24 may be utilized, such as at different locations of the surface assembly 220. In such an example, one group, such as in the chest region, may be adjusted to provide ALP therapy, while a second group, such as in the leg region, may remain inactive or in a neutral state.

[0103] The airbags 20, 24 extend along the width of the surface assembly 220 and are arranged in an alternating pattern adjacent to each other along the length of the surface assembly 220. Each airbag 20, 24 is composed of an outer membrane 300 defining a shell 302 and an elongated core 304 positioned within the shell 302. The outer membrane 300 is airtight and flexible, thereby allowing the airbags 20, 24 to adjust between expanded and compressed states. A non-limiting example of the outer membrane 300 includes polyurethane. The outer membrane 300 can be elastic so that the outer membrane 300 stretches or expands in an expanded state.

[0104] The outer membrane 300 is typically composed of two shells welded at a seam 306. Typically, high frequency welding is used to form the outer membrane 300. The seam 306 extends around the side edges of the core 304, thereby preventing the seam 306 from interacting with the patient to reduce interface pressure that may cause pressure injuries to develop. The airbag connector 308 is connected to the outer membrane 300 to provide fluid communication with the cover shell 302. The airbag connector 308 is typically arranged along or adjacent to the seam 306. The airbag connector 308 can be connected to the outer membrane 300 via welding and is in fluid communication with the corresponding feed connector 278, 280 when the airbags 20, 24 are arranged on the airbag base 270.

[0105] The core 304 is generally composed of a breathable (e.g., porous) and elastic or elastically deformable foam material. The foam material is configured to be compressed under a vacuum state and automatically expand to a neutral state due to the elasticity of the foam. The core 304 provides support for the patient when the airbags 20, 24 are in a neutral state and when the air pressure system 222 is in a non-powered state. In addition, the core 304 prevents the patient from feeling a bottoming effect. The shape of the core 304 is configured to define the shape of the airbags 20, 24 when the airbags 20, 24 are in a neutral state. The shape of the compressed core 304 is also configured to define the shape of the airbags 20, 24 in a compressed state. When the airbags 20, 24 expand, air is guided into the cover 302, thereby adjusting the outer membrane 300 away from the core 304. The core 304 remains the same as in the neutral state.

[0106] Refer again Fig.31 as well as Fig.33 and Fig.34, the first airbag 20 and the second airbag 24 are configured to adjust independently of each other when the pneumatic system 222 is in the energized state. In the energized state, the pneumatic system 222 alternates between the first operating state and the second operating state. For one cycle of ALP therapy, the pneumatic system 222 adjusts to the first operating state, the released state, the second operating state, and again to the released state. It is also contemplated that the pneumatic system 222 can adjust directly between the first operating state and the second operating state, bypassing the released state. In such examples, the connector 26 can bypass the release positions 40, 44, 120, 124, 128 and directly draw air from the inflated airbags 20, 24 and add air to the compressed airbags 20, 24.

[0107] The pump 194 is configured to drive fluid into the first balloon 20, thereby increasing the size of the first balloon 20 relative to the neutral state. At the same time, the pump 194 is configured to withdraw fluid from the second balloon 24 to a compressed state, thereby reducing the size of the second balloon 24 relative to the neutral state. During inflation, the interface pressure between the patient and the first balloon 20 increases. During deflating, the interface pressure between the patient and the second balloon 24 decreases or is removed.

[0108] The height difference between the expanded state and the compressed state provides a change in the shape of the support surface of the surface assembly 220. The expanded airbags 20, 24 can be close to the support surface, while the compressed airbags 20, 24 can be adjusted away from the support surface. The change in shape results in a low pressure area where the airbags 20, 24 are compressed. The expansion of the first airbag 20 and the compression of the second airbag 24 together provide a greater height difference between the first airbag 20 and the second airbag 24, thereby generating a greater local pressure contact release between the patient and the surface assembly 220 to allow reoxygenation of cells and increase blood circulation.

[0109] Still refer to Fig.31 , Fig.33 and Fig.34, when the airbags 20, 24 are in a neutral state, the airbags 20, 24 are at atmospheric pressure or equilibrium. In the neutral state, the airbags 20, 24 are at a pressure of approximately zero inches of water column ("H2O). When the airbags 20, 24 are adjusted to an inflated state, the airbags 20, 24 reach a pressure of approximately 15"H2O + / - approximately 10%. The positive internal pressure in the inflated state is typically achieved from equilibrium in less than 120 seconds. When the bladders 20, 24 are adjusted to the compressed state, the bladders 20, 24 reach a minimum pressure of approximately -10" H2O + / - approximately 20%. The negative internal pressure in the compressed state is typically reached from equilibrium in less than 120 seconds. At a medium level or medium setting, the adjustment speed from the pressurized state to equilibrium is typically greater than approximately 60% of the end pressure in approximately 30 seconds in the flat position of the surface assembly 220. The pressure value can be based on a P50 male patient and can remain the same for other patients, or can be adjusted accordingly or based on the setting and / or position of the surface assembly 220.

[0110] Pump 194 is configured to provide an airflow of at least approximately 10 L / mm during free flow and a minimum pressure of approximately 40" H2O relative pressure during blocked flow. In addition, pump 194 is configured to provide positive and negative pressure (vacuum) to provide an inhaled airflow of at least approximately 10 L / mm during free flow and a minimum pressure of approximately + / - 40" H2O relative pressure during blocked flow.

[0111] The pneumatic system 222 is configured to be adjusted to a first operating state by adjusting the connector 26 to the first position 38, the first airbag 20 is compressed, and the second airbag 24 is expanded. The pump 194 is activated until the airbags 20, 24 reach a predefined pressure. The pump 194 is then deactivated to maintain the state of the airbags 20, 24 for a predefined period of time. In this state, the pneumatic system 222 is closed. The pneumatic system 222 is configured to be opened in a released state by adjusting the connector 26 to the second position 40. The airbags 20, 24 are adjusted to balance and remain balanced in a neutral state for a predefined period of time. The connector 26 is then adjusted to the third position 42, thereby adjusting the pneumatic system 222 to a second operating state, the second airbag 24 is compressed, and the first airbag 20 is expanded. The pump 194 is then deactivated to maintain the state of the airbags 20, 24 for a predefined period of time. The pneumatic system 222 is configured to open in the released state by adjusting the connector 26 to the fourth position 120 , thereby allowing the airbags 20 , 24 to return to equilibrium.

[0112] like Fig.33 As shown, the first to fourth positions 38, 40, 42, 120 of the connector 26 are generated by a 180° rotation of the connector 26 and cause a complete cycle of the airbags 20, 24. Fig.34As shown, when the connector 26 is adjusted through the fifth position to the eighth position 122, 124, 126, 128, the airbags 20, 24 complete the second cycle. Therefore, the 360° rotation of the connector through the first position to the eighth position 38-40, 120-128 can cause two complete cycles of the airbags 20, 24. The connector 26 is configured to continuously rotate based on the ALP treatment regimen, thereby causing alternating pressure cycles with the first airbag 20 and the second airbag 24. In each state, the amount of time for ALP treatment and the amount of time to maintain the airbags 20, 24 can be set and adjusted by the caregiver.

[0113] When the surface assembly 220 is in a non-energized state, the airbags 20, 24 are in a neutral state and provide comfort and support to the patient. When the first airbag 20 and the second airbag 24 are in a neutral state, the size and shape of the core 304 define the size and shape of the corresponding first airbag 20 and the second airbag 24. When in a neutral state, the upper surface of the first airbag 20 and the upper surface of the second airbag 24 are generally coplanar to provide a generally planar support surface for the surface assembly 220. The upper surface may not be completely planar, but may form a generally flat or planar surface. The upper surfaces are generally aligned, but it is contemplated that the upper surfaces may be minimally offset from each other. The upper surface may have a certain degree of curvature or deformation caused by the shape of the first airbag 20 and the second airbag 24 and the patient's placement on the surface assembly 220. It is also contemplated that in a compressed state, the upper surface is also generally flat. In an expanded state, the upper surfaces of the airbags 20, 24 may be more rounded.

[0114] Reference Fig.35 , the control assembly 98 of the pneumatic system 222 includes a controller 320 having a processor 322, a memory 324, and other control circuits. Instructions or routines 326 are stored in the memory 324 and can be executed by the processor 322. The controller 320 can also include communication circuits 328 for bidirectional wired and wireless communications. In various aspects, the controller 320 includes routines 326 related to activation and step control of the motor 36. The stepping of the motor 36 corresponds to one of the positions 38-42, 120-128 of the connector 26, respectively.

[0115] Additionally, the controller 320 is in communication with the optical switch 64. The controller 320 can be configured to monitor the position 38-42, 120-128 of the connector 26 based on a zero reference point (e.g., using the reference notch 140). Furthermore, the controller 320 can compare the position of the connector 26 to a predefined position 38-42, 120-128 relative to the zero reference point to monitor the accuracy of the manifold assembly 10.

[0116] The controller 320 is also communicatively coupled to the sensor 290, which is in fluid communication with the measurement ports 286, 288. The sensor 290 is configured to sense the pressure within the pneumatic system 222 and transmit the sensed pressure to the controller 320. The controller 320 can be configured to monitor the sensed information and alert a caregiver when the sensed pressure exceeds a predefined range based on ALP therapy. By using the sensed information, the controller 320 can distinguish whether the first airbag 20 and / or the second airbag 24 exceeds the predefined range, which can assist the caregiver in determining the cause of the pressure change exceeding the predefined range.

[0117] Reference Fig.36 , the surface assembly 220 is used on a support device 340, which is illustrated as a medical bed. In such an example, the support device 340 includes an upper frame 342 and a base frame 344. The upper frame 342 is generally adjustable relative to the base frame 344 (e.g., height, tilt, etc.). The upper frame 342 may include a plurality of segments that are independently movable relative to each other. The independently movable segments allow adjustment of various portions of the upper frame 342 (e.g., a raised head of bed area, a lowered foot of bed area, etc.). The segments together form a surface for supporting the surface assembly 220.

[0118] The support device 340 includes a plurality of bedside panels 346 that are operable between raised and lowered states to selectively allow access to the patient and entry and exit from the support device 340. At least one of the bedside panels 346 includes a user interface 348 for receiving input from a caregiver. In various aspects, the caregiver can control the surface assembly 220 via input through the user interface 348 on the bedside panel 346.

[0119] Refer again Fig.35 and Fig.36 , the controller 320 of the pneumatic system 222 is communicatively coupled to various devices and systems via wired and / or wireless communications. In various examples, the controller 320 is communicatively coupled to a control unit 350 of the support device 340. Accordingly, input received through the user interface 348 can be transmitted to the control unit 350 and then transmitted to the controller 320 of the pneumatic system 222. The controller 320 of the pneumatic system 222 can also be configured to be directly or indirectly communicatively coupled to other institutional devices such as a computer or a status board of a nurse call station.

[0120] In addition, the controller 320 can be configured to communicate directly or indirectly with a remote device 352, such as a phone, tablet, laptop, wearable device, or other mobile communication device via a communication network 354. The communication network 354 can be part of the medical institution's network. The network can include a combination of wired connections and wireless connections, and the wireless connections can include a wireless communication network 354. The communication network 354 includes various electronic devices, and the electronic devices can include a combination of various wired or wireless communication protocols. The communication network 354 can be implemented via one or more direct or indirect non-hierarchical communication protocols, including but not limited to Low Energy (BLE), Thread, Ultra-Wideband, Z-Wave, ZigBee, etc.

[0121] In addition, the communication network 354 can correspond to a centralized hierarchical communication network 354, in which one or more devices communicate via a router (e.g., a communication routing controller). The communication network 354 can be implemented by a variety of communication protocols, including but not limited to global system for mobile communications (GSM), general packet radio service, code division multiple access, enhanced data GSM environment, fourth generation wireless communication (4G), fifth generation wireless communication (5G), Wi-Fi, world microwave access interoperability (WiMAX), local area network, Ethernet, etc. By flexibly implementing the communication network 354, various devices and servers can communicate with each other directly via the wireless communication network 354 or a cellular data connection.

[0122] Communication with the pneumatic system 222 is advantageous for monitoring the operation and efficacy of ALP therapy. In addition, communication allows a caregiver to monitor the functionality and accuracy of the pneumatic system 222. The controller 320 and control unit 350 disclosed herein may include various types of digital or analog control circuits, and may each include a processor, a microcontroller, an application specific integrated circuit (ASIC), or other circuits configured to perform various input or output, control, analysis, or other functions described herein. The memory herein may be implemented in a variety of volatile and non-volatile memory formats. Routines include operating instructions that enable the various methods and functions herein.

[0123] Use of the present device may provide a variety of advantages. For example, the manifold assembly 10 may be used to provide ALP therapy, wherein one set of balloons 20, 24 is inflated and a second set of balloons 20, 24 is compressed via a vacuum. Using both the inflated state and the compressed state increases the height difference between the first balloon 20 and the second balloon 24, thereby increasing pressure relief through ALP therapy. In addition, the manifold assembly 10 is configured with a swivel connector 26 that changes fluid communication of the manifold assembly 10 with the pump 194 and with the external environment. In addition, the manifold assembly 10 has a release state that utilizes the release notches 32, 34, 170, 172 to discharge the inflated balloons 20, 24 to a deflated neutral state or equilibrium and to inflate the compressed balloons 20, 24 to an inflated neutral state or equilibrium. In addition, the conical spring 62 is configured to reduce the overall height and provide a more compact manifold assembly 10 and pneumatic system 222. In addition, the manifold assembly 10 uses grease as the sealant 144, which reduces the number of components used in the manifold assembly 10. Other benefits and advantages may be realized and / or achieved.

[0124] The apparatus disclosed herein is further summarized in the following paragraphs and is further characterized by any and all combinations of the various aspects described therein.

[0125] According to one aspect of the present disclosure, a manifold assembly includes a manifold core, which defines an inlet tube defining a portion of a positive pressure path, an outlet tube defining a portion of a negative pressure path, a first protrusion configured to be coupled to a first airbag fluid, and a second protrusion configured to be coupled to a second airbag fluid. A connector is operably coupled to the manifold core. The connector defines a first passage area, a second passage area, and a first release recess and a second release recess. A motor is operably coupled to the connector to rotate the connector relative to the manifold core. The motor is configured to: rotate the connector to a first position to fluidly couple the outlet tube to the first protrusion via the first passage area and to fluidly couple the inlet tube to the second protrusion via the second passage area; rotate the connector to a second position to fluidly couple the first protrusion to the first release recess and to fluidly couple the second protrusion to the second release recess; and rotate the connector to a third position to fluidly couple the outlet tube to the second protrusion via the first passage area and to fluidly couple the inlet tube to the first protrusion via the second passage area.

[0126] According to another aspect of the present disclosure, the motor is configured to rotate the connector 45° in the first direction from the first position to the second position.

[0127] According to another aspect of the present disclosure, the motor is configured to rotate the connector 45° in the first direction from the second position to the third position.

[0128] According to another aspect of the present disclosure, the manifold core has an engagement surface configured to abut the connector. The engagement surface defines holes in fluid communication with the inlet tube, the outlet tube, the first protrusion, and the second protrusion, respectively.

[0129] According to another aspect of the present disclosure, the first passage area, the second passage area, and the first and second relief notches rotate relative to the aperture when the connector is rotated.

[0130] According to another aspect of the present disclosure, the outlet tube, the first protrusion, and the second protrusion extend from the manifold core in a first direction, and the inlet tube extends from the manifold core in a second direction.

[0131] According to another aspect of the present disclosure, an optical switch is configured to sense a position of a connector.

[0132] According to another aspect of the present disclosure, in the first operating state, the positive pressure path is partially defined by the first airbag, and the negative pressure path is partially defined by the second airbag. In the second operating state, the positive pressure path is partially defined by the first airbag, and the negative pressure path is partially defined by the second airbag.

[0133] According to another aspect of the present disclosure, a drive shaft extends from the motor, through the manifold core and through the connector. A locating pin is disposed in a groove defined by the connector. The locating pin extends through the drive shaft to couple the drive shaft to the connector.

[0134] According to another aspect of the present disclosure, the motor is disposed within the housing. A spring is coupled to the housing and the manifold core to bias the manifold core toward the connector.

[0135] According to another aspect of the present disclosure, the spring defines a conical shape.

[0136] According to another aspect of the present disclosure, the spring extends at least partially through the manifold core.

[0137] According to another aspect of the present disclosure, a surface assembly includes a covering defining an interior. A first airbag is disposed in the interior. A second airbag is disposed in the interior. Each of the first airbag and the second airbag is operable between an expanded state, a neutral state, and a compressed state. A pump has an inlet port and an outlet port. The pump is configured to provide positive pressure through the outlet port and to provide negative pressure through the inlet port. A manifold assembly is in fluid communication with the pump and each of the first and second airbags. The manifold assembly includes a manifold core having an inlet pipe in fluid communication with the outlet port and an outlet pipe in fluid communication with the inlet port. The manifold core has a first protrusion in fluid communication with the first airbag and a second protrusion in fluid communication with the second airbag. A connector is operably coupled to the manifold core. The connector defines a first passage area, a second passage area, and a release notch. A motor is operably coupled to the connector. The motor is configured to rotate the connector relative to the manifold core to couple the first bladder fluid to the inlet port and the second bladder fluid to the outlet port in a first operating state and to couple the first bladder fluid to the outlet port and the second bladder fluid to the inlet port in a second operating state.

[0138] According to another aspect of the present disclosure, the manifold core has an engagement surface defining holes in fluid communication with the first protrusion, the second protrusion, the inlet tube, and the outlet tube, respectively. Fluid flows from the outlet port to the inlet port through the holes based on the position of the connector.

[0139] According to another aspect of the present disclosure, the holes are arranged at 45° to each other.

[0140] According to another aspect of the present disclosure, the release notch is configured to align with holes in fluid communication with the first and second protrusions, respectively, in a released state to fluidly couple the first and second protrusions with the outer area to adjust the first and second airbags to a neutral state.

[0141] According to another aspect of the present disclosure, the pump is configured to direct fluid into the first bladder to adjust the first bladder to an expanded state and to extract fluid from the second bladder to adjust the second bladder to a compressed state in a first operating state.

[0142] According to another aspect of the present disclosure, the pump is configured to direct fluid into the second airbag to adjust the second airbag to an expanded state and to extract fluid from the first airbag to adjust the first airbag to a compressed state in a second operating state.

[0143] According to another aspect of the present disclosure, the support base extends in the interior of the cover, the fixing belt is coupled to the support base, and the first airbag and the second airbag are respectively disposed in the fixing belt.

[0144] According to another aspect of the present disclosure, the first airbag and the second airbag are respectively disposed in a plurality of retaining belts.

[0145] According to another aspect of the present disclosure, a pneumatic system includes a first airbag and a second airbag arranged in an alternating manner. The pump is configured to provide positive pressure and negative pressure. The manifold assembly is fluidly connected to the first airbag, the second airbag and the pump. The manifold assembly includes a manifold core having a bonding surface, and the bonding surface defines holes that are fluidly connected to an inlet pipe, an outlet pipe, a first protrusion and a second protrusion, respectively. The connector defines a first passage area, a second passage area and a release notch. The motor is configured to rotate the connector relative to the manifold core. The controller is connected to the pump and the motor in communication. The controller is configured to: activate the motor to rotate the connector to fluidly connect the inlet pipe to the first protrusion and the outlet pipe to the second protrusion in at least one operating state; and activate the motor to rotate the connector to align the release notch with the hole that is fluidly connected to the first protrusion and the second protrusion in the release state.

[0146] According to another aspect of the present disclosure, each airbag includes an outer film defining a casing, a core disposed within the casing, and an airbag connector coupled to the outer film and in fluid communication with the casing.

[0147] According to another aspect of the present disclosure, each bladder is operable between a compressed state, a neutral state, and an expanded state. The shape of the core defines the shape of the bladder in the neutral state and the compressed state.

[0148] According to another aspect of the present disclosure, when the balloon is in an inflated state, the outer membrane is at least partially spaced apart from the core.

[0149] According to another aspect of the present disclosure, the at least one operating state includes a first operating state and a second operating state. In the first operating state, the inlet pipe is fluidly coupled to the second protrusion, and the outlet pipe is fluidly coupled to the first protrusion.

[0150] According to another aspect of the present disclosure, in a second operating state, the inlet pipe is fluidly coupled to the first projection, and the outlet pipe is fluidly coupled to the second projection.

[0151] According to another aspect of the present disclosure, positions of the first passage area and the second passage area of ​​the connector determine whether the pneumatic system is in the first operating state or the second operating state.

[0152] According to another aspect of the present disclosure, a sensor is in fluid communication with the first airbag and the second airbag. The sensor is configured to sense pressure within the first airbag and the second airbag, respectively.

[0153] According to another aspect of the present disclosure, a manifold assembly includes a housing, a motor is disposed in the housing, and a drive shaft extends from the motor and passes through the housing to engage with a connector.

[0154] According to another aspect of the present disclosure, a housing includes a support defining a space for receiving a manifold core.

[0155] A device for guiding airflow includes a core device, the core device having an inlet tube defining a portion of a positive pressure path, an outlet tube defining a portion of a negative pressure path, a first protrusion configured to be fluidly coupled to a first airbag device, and a second protrusion configured to be fluidly coupled to a second airbag device. The guide device is operably coupled to the core device. The guide device defines a first device for guiding airflow, a second device for guiding airflow, and a first release device and a second release device. A drive device is operably coupled to the guide device through the core device so as to rotate the guide device relative to the core device. The drive device is configured to: rotate the guide device to a first position to fluidly couple the outlet tube to the first protrusion via the first device for guiding airflow and to fluidly couple the inlet tube to the second protrusion via the second device for guiding airflow; rotate the guide device to a second position to fluidly couple the first protrusion to the first release device and to fluidly couple the second protrusion to the second release device; and rotate the guide device to a third position to fluidly couple the outlet tube to the second protrusion via the first device for guiding airflow and to fluidly couple the inlet tube to the first protrusion via the second device for guiding airflow.

[0156] Related applications (e.g., those listed herein) are incorporated herein by reference in their entirety. The claims in the related applications are intended to help determine the scope and interpretation of the disclosed information. Any changes between any related application and the present disclosure are not intended to limit the scope or interpretation of the disclosed information (including the claims). Accordingly, the present application includes the scope and interpretation of the disclosed information and the scope and interpretation of the information in any or all related applications.

[0157] It should be understood by those skilled in the art that the construction of the present disclosure and other components is not limited to any specific material.Other exemplary embodiments of the present disclosure may be formed of a variety of materials unless otherwise specified herein.

[0158] For purposes of this disclosure, the term "coupled" (in all its variations) refers generally to the direct or indirect coupling of two (electrical or mechanical) components to one another. Such coupling may be fixed in nature or movable in nature. Such coupling may be achieved by the two (electrical or mechanical) components being integrally formed as a single unitary body with any other intermediate members or by the two components. Such coupling may be permanent in nature or removable or releasable in nature unless otherwise stated.

[0159] It should also be noted that the construction and arrangement of the elements of the present disclosure in the exemplary embodiments are only illustrative. Although the present disclosure only describes several embodiments of the present innovation in detail, it is easy for those skilled in the art to understand after reading the present disclosure that many modifications (such as changes in the size, size, structure, shape and proportion, parameter value, installation arrangement, material, color, direction, etc. of various elements) can be made without substantially deviating from the novel teaching and advantages of the subject matter. For example, an element shown as integrally formed can be composed of multiple parts, an element shown as multiple parts can also be integrally formed, the interface operation can be reversible or can be otherwise changed, the length or width of the structure and / or components or connectors or other elements of the system can be variable, and the nature or number of the adjustment position between the elements can be variable. It should be noted that the elements and / or components of the system can be composed of any variety of materials that provide sufficient strength or durability in any variety of colors, textures and combinations. Accordingly, all these modifications are intended to be included within the scope of the present innovation. Without departing from the spirit of the present innovation, other replacements, modifications, changes and omissions can be made to the design, operating state and arrangement of the expected and other exemplary embodiments.

[0160] It should be understood that any of the above processes or process steps can be combined with other disclosed processes or steps to form structures within the scope of the present disclosure. The exemplary structures and processes disclosed herein are for illustrative purposes only and should not be construed as limiting.

Claims

1. A manifold assembly comprising: a manifold core defining an inlet tube defining a portion of a positive pressure path, an outlet tube defining a portion of a negative pressure path, a first protrusion configured to fluidly couple with a first bladder, and a second protrusion configured to fluidly couple with a second bladder; a connector operably coupled to the manifold core, wherein the connector defines a first passage area, a second passage area, and a first relief notch and a second relief notch; as well as a motor operably coupled to the connector to rotate the connector relative to the manifold core, wherein the motor is configured to: rotating the connector to a first position to fluidly couple the outlet tube to the first projection via the first passage region and to fluidly couple the inlet tube to the second projection via the second passage region; rotating the connector to a second position to fluidly couple the first protrusion with the first release notch and to fluidly couple the second protrusion with the second release notch; as well as The connector is rotated to a third position to fluidly couple the outlet tube to the second projection via the first passage area and to fluidly couple the inlet tube to the first projection via the second passage area.

2. The manifold assembly of claim 1, wherein the motor is configured to rotate the connector 45° in a first direction from the first position to the second position, and wherein the motor is configured to rotate the connector 45° in the first direction from the second position to the third position.

3. A manifold assembly according to claim 1 or 2, wherein the manifold core has a mating surface configured to abut the connector, and wherein the mating surface defines holes that are fluidly connected to the inlet pipe, the outlet pipe, the first protrusion and the second protrusion, respectively, and wherein the first passage area, the second passage area and the first release recess and the second release recess rotate relative to the hole when the connector is rotated.

4. The manifold assembly of any one of claims 1 to 3, wherein the outlet tube, the first protrusion, and the second protrusion extend from the manifold core in a first direction, and the inlet tube extends from the manifold core in a second direction.

5. The manifold assembly according to any one of claims 1 to 4, further comprising: a drive shaft extending from the motor, through the manifold core, and through the connector; as well as A locating pin is disposed in a recess defined by the connector, wherein the locating pin extends through the drive shaft to couple the drive shaft to the connector.

6. The manifold assembly according to any one of claims 1 to 5, further comprising: a housing, wherein the motor is disposed within the housing; as well as A spring is coupled to the housing and the manifold core to bias the manifold core toward the connector.

7. The manifold assembly of claim 6, wherein the spring defines a conical shape.

8. A manifold assembly according to any one of claims 1 to 7, wherein in a first operating state, the positive pressure path is partially defined by the first airbag and the negative pressure path is partially defined by the second airbag, and wherein in a second operating state, the positive pressure path is partially defined by the first airbag and the negative pressure path is partially defined by the second airbag.

9. A surface assembly comprising: Covering, defining the interior; a first airbag disposed in the interior; a second airbag disposed in the interior, wherein each of the first airbag and the second airbag is operable between an expanded state, a neutral state, and a compressed state; a pump having an inlet port and an outlet port, wherein the pump is configured to provide positive pressure through the outlet port and negative pressure through the inlet port; as well as a manifold assembly in fluid communication with the pump and each of the first and second bladders, the manifold assembly comprising: a manifold core having an inlet tube in fluid communication with the outlet port and an outlet tube in fluid communication with the inlet port, wherein the manifold core has a first protrusion in fluid communication with the first bladder and a second protrusion in fluid communication with the second bladder; a connector operably coupled to the manifold core, wherein the connector defines a first passage area, a second passage area, and a relief notch; and A motor operably coupled to the connector, wherein the motor is configured to rotate the connector relative to the manifold core to couple the first bladder fluid to the inlet port and the second bladder fluid to the outlet port in a first operating state, and to couple the first bladder fluid to the outlet port and the second bladder fluid to the inlet port in a second operating state.

10. The surface assembly of claim 9, wherein the manifold core has a mating surface defining holes that are fluidly connected to the first protrusion, the second protrusion, the inlet tube, and the outlet tube, respectively, and wherein fluid flows from the outlet port to the inlet port through the holes based on the position of the connector.

11. A surface assembly according to claim 10, wherein the holes are arranged at 45° to each other.

12. The surface assembly of claim 9, wherein the release recess is configured to align with holes in fluid communication with the first protrusion and the second protrusion, respectively, in a released state to fluidly couple the first protrusion and the second protrusion to an external area to adjust the first airbag and the second airbag to a neutral state.

13. The surface assembly of any one of claims 9 to 12, wherein the pump is configured to, in the first operating state, direct fluid into the second airbag to adjust the second airbag to an expanded state and to extract fluid from the first airbag to adjust the first airbag to a compressed state.

14. The surface assembly of claim 13, wherein the pump is configured to direct the fluid into the first airbag to adjust the first airbag to the expanded state and to extract the fluid from the second airbag to adjust the second airbag to the compressed state in the second operating state.

15. The surface assembly according to any one of claims 9 to 14, further comprising: a support base extending within the interior of the cover; as well as A fixing belt is coupled to the support base, wherein the first air bag and the second air bag are respectively disposed in the fixing belt.

16. A pneumatic system comprising: First airbag; second airbags arranged in an alternating manner with the first airbags; a pump configured to provide positive and negative pressure; a manifold assembly fluidly coupled to the first bladder, the second bladder, and the pump, wherein the manifold assembly comprises: a manifold core having an engagement surface defining holes in fluid communication with the inlet tube, the outlet tube, the first projection, and the second projection, respectively; a connector defining a first access area, a second access area, and a relief notch; and a motor configured to rotate the connector relative to the manifold core; and a controller coupled in communication with the pump and the motor, wherein the controller is configured to: activating the motor to rotate the connector to fluidly couple the inlet tube with the first projection and the outlet tube with the second projection in at least one operating state; and The motor is activated to rotate the connector to align the release notch with the hole in fluid communication with the first protrusion and the second protrusion in the released state.

17. The pneumatic system of claim 16, wherein the at least one operating state comprises a first operating state and a second operating state, and wherein in the first operating state, the inlet pipe is fluidly coupled to the second projection and the outlet pipe is fluidly coupled to the first projection, and wherein in the second operating state, the inlet pipe is fluidly coupled to the first projection and the outlet pipe is fluidly coupled to the second projection.

18. The pneumatic system of claim 17, wherein positions of the first and second passage areas of the connector determine whether the pneumatic system is in the first operating state or the second operating state.

19. The pneumatic system according to any one of claims 16 to 18, further comprising: A sensor is in fluid communication with the first airbag and the second airbag, wherein the sensor is configured to sense pressure within the first airbag and the second airbag, respectively.

20. A pneumatic system according to any one of claims 16 to 19, wherein the manifold assembly includes a housing, the motor is disposed within the housing, and wherein a drive shaft extends from the motor and through the housing to engage the connector.

Images