Hospital gas cylinder transport trolley with semi-rigid fixing straps

Abstract

Title of the invention Hospital trolley for transporting gas cylinders with semi-rigid fixing straps The invention relates to a mobile trolley (1) comprising a base (2), several casters (3), a support structure (4) projecting upwards from the base (2), and at least one fixing device (30) arranged on the support structure (4) for fixing one or more gas cylinders (50) to the support structure (4). Each fixing device (30) comprises a first strap element (31) having a first free end (31.1), and a second strap element (32) comprising a connection device (20), which become secured to each other when the first free end (31.1) of the first strap element (31) cooperates with the connection device (20) of the second strap element (32). The strap elements (31, 32) are made of semi-rigid polymer material.Use of such a mobile trolley (1) for transporting one or more gas cylinders containing a NO / N2 mixture and / or oxygen Abstract figure: Figure 1.

Description

Title of the invention: Hospital trolley for transporting gas cylinders with semi-rigid fixing straps

[0001] The invention relates to a mobile hospital trolley allowing the simultaneous transport of one or more pressurized gas cylinder(s) and a gas supply apparatus, in particular medical NO, in order to be able to supply the gas to a patient in need thereof, in particular in a hospital environment, in particular in intensive care units, which trolley comprises improved fixing straps facilitating the fixing of the pressurized gas cylinder(s) to the trolley in order to prevent them from tipping over and falling onto the ground.

[0002] Nitric oxide or NO is a gaseous drug used to treat various medical conditions in a patient, such as Persistent Pulmonary Hypertension of the Newborn or PPHN (for Acute Respiratory Distress Syndrome or ARDS observed mainly in adults or pulmonary hypertension or PH in cardiac surgery, as taught in particular by EP-A-560928, EP-A-1516639 or US-A-10,201,564.

[0003] Usually, gaseous NO is packaged in a pressurized gas cylinder, in a form diluted in nitrogen (N2), i.e. in the form of NO / N2 mixtures. Conventionally, the volume concentration of NO in a NO / N2 mixture packaged in a pressurized gas cylinder is between 100 and 10,000 ppmv, generally between 200 and 1,000 ppmv, for example 800 ppmv. (i.e. ppmv = ppm by volume).

[0004] In order to administer it to a patient, the gaseous NO, i.e. the NO / N2 gas mixture, coming from one or more gas cylinders is supplied to a NO delivery device which is itself connected to the inspiratory branch of a patient circuit fluidly connected, on the one hand, to a mechanical ventilator supplying air or an N2 / O2 mixture and, on the other hand, to a respiratory interface (e.g. intubation probe, respiratory mask, etc.) delivering the final gas mixture containing the NO at the desired dosage, which has been obtained by mixing the NO flow with the air flow or N2 / O2 mixture, as described by US-A-5,558,083.

[0005] In a hospital environment, the movement or transport of gas cylinders, materials or medical devices is conventionally carried out by means of a transport trolley. Examples of different hospital trolleys are given by EP2574361, EP1977712, EP3854368, EP3854660, US2009 / 0302178, FR2926728 and FR2910362.

[0006] US2016 / 0310693 is also known, which teaches a mobile trolley comprising a base mounted on casters and equipped with storage locations for housing gas cylinders, especially NO. The gas cylinders are held in place by securing straps. It is common practice to secure the cylinders by securely attaching them to the trolley's support structure to prevent them from falling.

[0007] To do this, flexible fabric straps are commonly used which are equipped with closing buckles, as illustrated in [Fig.2]. However, in practice, this type of flexible strap poses several problems, in particular they are difficult to put in place, in particular they tend to get stuck behind the gas bottles, and therefore cause a loss of time when putting them in place by the nursing staff, and moreover are difficult to clean and disinfect.

[0008] In other words, the problem is to propose an improved mobile medical trolley, particularly in terms of safety, making it possible to solve all or part of the aforementioned problems.

[0009] According to the invention, there is provided a mobile trolley, i.e. a unit for transporting gas bottles and possibly other materials or devices which is designed to roll on the ground during its movements, comprising: - a base configured to house, i.e. receive, at least one gas bottle, - several wheels to move the trolley on the floor, - a support structure projecting upwards from the base, and - at least one fixing device (i.e. a fastening device) arranged on the support structure for fixing (i.e. attaching) said at least one gas bottle to said support structure,

[0010] wherein said at least one fastening device comprises a first strap element comprising a first free end, and a second strap element comprising a connection device, said first strap element cooperating with the second strap element to enable them to be secured to each other, when the first free end of the first strap element cooperates with the connection device of the second strap element.

[0011] According to the invention, the first strap element and second strap element are made of (one of) the semi-rigid polymer materials.

[0012] Indeed, using strap elements made of semi-rigid polymer material is advantageous and addresses the aforementioned problem. In particular, handling the straps by the user is easier because the straps remain in position unlike fabric straps which fall under gravity. In addition, cleaning the straps is simplified because polymer straps do not have the same porosities as flexible fabric straps, and therefore become dirty less quickly and / or are easier to clean.

[0013] According to the embodiment considered, the trolley of the invention can comprise one or more of the following characteristics: - the first strap element and second strap element are made of polymer material chosen from polyurethane or polyamide, such as nylon®. - The first strap element and the second strap element are configured to be secured to each other, i.e., to be attached or connected to each other. - the connection device of the second strap element comprises a main body crossed by an internal passage extending between an inlet and an outlet, which internal passage is configured to house at least a portion of the first strap element. - the connection device of the second strap element comprises locking means movable between at least two positions, comprising a locking or blocking position, and a release or unlocking position. - in the locking position, the locking means cooperate with the first strap element inserted into the internal passage, to prevent, i.e. prohibit or oppose, (at least) any withdrawal movement of said first strap element within the internal passage. - in the release position, the locking means allow (i.e. authorize or no longer oppose) a withdrawal movement of the first strap element from said internal passage. - the connection device of the second strap element further comprises release means, actuable by the user, cooperating with the locking means, to move them from the locking position to the release position, when they are actuated by the user. - the first strap element is configured to be inserted, via its first free end, into the internal passage of the connection device of the second strap element, via the entrance to said internal passage of the connection device, in order to allow the first strap element to be blocked (i.e. secured) within said internal passage of the connection device of the second strap element. - the first strap element can be inserted by the user into the internal passage of the connection device of the second strap element via a translational movement, i.e. a translational insertion movement, in order to ensure a fixing of the first and second strap elements to each other, and thus ensure a fixing (i.e. a fastening) of the gas cylinder to the trolley. - conversely, the first strap element can be removed, i.e. extracted, by the user of the internal passage of the connection device of the second strap element via a withdrawal or retraction movement, also in translation, which is opposite to the insertion movement, i.e. a withdrawal movement in translation. the movement of removing the first strap element from the internal passage or inserting the first strap element into the internal passage is a translational movement. in the locking position, the locking means cooperate with a raised textured region of the first strap element, in particular the locking means press on the raised textured region. the textured region in relief comprises a succession of grooves arranged parallel to each other, preferably rectilinear grooves. the raised textured region is carried on an outer face of the first strap element. the raised textured region extends on the outer face from the first free end. the raised textured region comprises a succession of grooves forming raised striations or the like. the grooves 310 are juxtaposed with each other. the grooves are shaped to allow insertion (in translation) of the first strap element into the internal passage of the body of the connection device but prevent its removal from said internal passage, when the locking means are in the locking position and cooperate with the grooves. the grooves form a relief in 'peaks' and 'valleys'. the grooves have triangular sections. the grooves each have a front side forming a ramp and a (substantially) vertical rear side, separated by a peak. the front side forming a ramp forms with the (substantially) vertical rear side an angle of between 30 and 60°, preferably of the order of 40 to 50°. two successive grooves are separated by a valley. the first strap element further comprises an inner face opposite the outer face. the internal face of the first strap element presses on the bottle held by said first strap element. the inner face of the first strap element is smooth, i.e. not textured. the textured region in relief extends over at least 30%, preferably at least 40%, preferably at least 50%, preferably at least 75%, or even at least less than 80% of the surface area or surface of the external face of the first strap element. the first strap element and the second strap element each have an elongated shape, preferably a strip or ribbon shape. the first strap element comprises a second end secured to the support structure, typically fixed to the front column or to the rear column, for example by screwing. the second strap element comprises an upstream end secured to the support structure, typically fixed to the front column or to the rear column, for example by screwing. according to another embodiment, the first strap element and the second strap element are secured to each other via the second end of the first strap element and the upstream end of the second strap element which are connected to each other. according to yet another embodiment, the first strap member and the second strap member are formed from a single polymeric strip. it comprises several fixing devices, preferably pairs of fixing devices. the pairs of fixing devices are fixed to the supporting structure, typically fixed to the front column and / or the rear column, for example by screwing. Each gas bottle is secured by a pair of fixing devices. it comprises at least one gas cylinder containing a NO / N2 mixture and / or an oxygen cylinder arranged on the base. in the locking position, the locking means prevent any movement of withdrawal or insertion of the first strap element into the internal passage, in the release position, the locking means do not cooperate or no longer cooperate with the first strap element. the internal passage of the body of the connecting device is configured and dimensioned to accommodate at least a portion of the first strap element when said first strap element is inserted therein by the user, via the inlet and towards the outlet of said internal passage. the release means, actuable by the user, cooperate with the locking means to move them from the release position to the locking position, when they are not actuated by the user, i.e. released. The locking position therefore corresponds to a default or rest position. the release means and the blocking means are movable one by one relative to each other, for example pivoting relative to each other. the release means comprise a push button or the like, typically a push button which the user presses to actuate it. when actuated by the user, the release means act mechanically, directly or indirectly, on the locking means to move them from the locking position to the release position. the locking means are normally returned to the locking position in the absence of any actuation by the user of the release means, the locking means are normally returned to the locking position by an elastic return means, in particular by a spring device or means or the like. in the released position, the locking means no longer interact with the first strap element, in particular with said textured region in relief, in particular to allow its removal from the internal passage of the body of the connection device. the locking means comprise a projecting part, such as a cam or the like, cooperating with the textured region in relief, typically with the rectilinear grooves, in order to oppose, i.e. block or prevent, the first strap element from passing internally through the body of the connection device, when said locking means, typically said projecting part, cooperate with the textured region in relief, in the locking position. it further comprises tightening means, actuable by the user, configured to cooperate with the textured region in relief of the first strap element, when said first strap element is inserted into the internal passage of the connection device of the second strap element and the locking means are in the locking position, so as to advance in translation, when they are actuated by the user, the first strap element within the internal passage of the connection device, in the direction of insertion, so as to increase the tightening. the clamping means comprise a lever element operable by the user. the lever element is pivotable, preferably along a YY axis. the lever element comprises a distal portion cooperating with the textured region of the first strap element when the first strap element is housed in the internal passage of the connecting device of the second strap element. the distal portion of the lever element presses (e.g. in abutment) on the textured region of the first strap element, in particular on one of the faces of a groove, i.e. its vertical front face. the proximal portion of the lever element is operable by the user, in particular he can actuate it and / or grasp it to pivot or tilt the lever element. the proximal portion and the distal portion of the lever element are connected by a joining portion. the proximal portion has a loop shape. the clamping means are movable at least between a rest position in which they do not interact with the textured region of the first strap element and an actuating position in which they interact, i.e. cooperate, with the textured region of the first strap element. the clamping means are normally returned to the rest position in the absence of any actuation by the user. the clamping means are normally returned to the rest position by an additional elastic return means, in particular by a spring device or means or the like. the internal passage of the body of the connection device has a first rectangular section, preferably it forms a slot. the first strap element and the second strap element have a rectangular section (i.e. a shape). the first strap element is sized so as to be able to be inserted in translation within the internal passage of the body of the connection device, the first strap element has a second rectangular section (i.e. a shape) complementary to the first rectangular section of the internal passage of the body of the connection device so as to be able to be inserted in translation within said internal passage of the body of the connection device, i.e. the second section is smaller than the first section. the strap elements comprise or are sections of strap. the base, i.e. a chassis or the like, comprises at least one gas bottle storage location for housing a gas bottle, preferably several gas bottle storage locations. it comprises at least 3 or 4 casters used to move the trolley on the ground, typically 4 casters, preferably steerable and / or fitted with a brake, it comprises at least one manual grip handle allowing a user to manipulate the trolley, in particular to steer it, to pull or push it when moving on the floor. The manual grip handle is attached, directly or indirectly, to the support structure. It is sized to be grasped manually by a user to maneuver the trolley. the support structure includes at least one rear column, also called the main column. the support structure comprises (at least) a rear column and a front column, also called a secondary column, preferably arranged in parallel to each other. the front and rear columns project upwards from the base. the front and rear columns are arranged spaced apart from each other, preferably spaced several centimeters to several tens of centimeters apart. the front and rear columns are for example profiles of circular, rectangular or square section, or other. the front column has a section of the order of 3 to 8 cm, typically 3 to 6 cm, for example a square section of 4 x 4 cm. the rear column has a section of the order of 3 to 25 cm, for example a rectangular section of 4 x 16 cm. The front and rear columns are made of long, straight sections, preferably made of aluminum alloy. However, another material may be suitable. the support structure is surmounted by a tray structure, preferably comprising a tray for receiving instruments, medical equipment or other materials. the front and rear columns are secured to each other, preferably at their upper ends, in particular via an anchoring structure. the anchoring structure carries or includes the tray, for example a plate or the like forming a tray. it includes a storage box fixed, directly or indirectly, to the support structure, in particular to the main column. the box is flat and / or made of polymer. the box has a general parallelepiped shape (approximately) rectangle. the box includes one or more internal storage compartments, with or without access doors or the like. the box has a height (H) of approximately between 60 and 110 cm, a width (L) of between 15 and 60 cm, and a thickness (E) of between 5 and 18 cm. at least one gas bottle is housed in at least one location of the base, preferably a gas bottle containing an NO / N2 mixture. It includes two NO / N2 mixture bottles housed in two locations on the base. the secondary column is arranged, i.e. located, between the two NO / N2 mixing bottles. the gas cylinder(s) contains a NO / N2 gas mixture containing 100 to 10,000 ppmv of NO and nitrogen for the remainder, preferably 100 to 2,000 ppmv of NO. the gas cylinder(s), i.e. each NO / N2 mixture cylinder, contains a NO / N2 gas mixture containing from 100 to 1000 ppmv of NO and nitrogen for the remainder, preferably from 200 to 1000 ppmv of NO. the gas cylinder(s) contains gas at a pressure between 5 bar and at least 200 bar abs. Each NO / N2 mixture bottle is attached, directly or indirectly, to one of the front or rear columns. It also includes an oxygen (O2) bottle in an additional location on the base. the oxygen (O2) bottle is attached, directly or indirectly, to the front column. the support structure is topped with a mast intended to carry a gas delivery device. the mast is integral with the support structure, in particular the anchoring structure connecting the main column to the secondary column. a gas delivery device is attached to the mast, preferably via a VESA type mounting plate or similar, in particular a NO / N2 mixture supply device. the gas cylinder(s) is / are equipped with a gas distribution tap, in particular a tap with an integrated pressure regulator (IRR). the gas bottle(s) is equipped with a protective cover protecting the gas distribution tap. the gas bottle(s) have an ogive shape, i.e. a cylindrical body topped with a narrowed portion forming a neck with a gas inlet / outlet opening communicating with the internal storage volume of the gas bottle. The mobile cart is designed to be rolled on the floor when handled and moved, typically pushed or pulled, by a user, particularly a healthcare personnel, for example a doctor, nurse or similar, within a hospital building or similar. - the base of the trolley is located in the lower part of the trolley, that is to say at its base which is located in the immediate vicinity of the ground. - the base of the trolley includes a platform where the storage locations are arranged, each sized to receive a gas bottle in an upright position. - the trolley includes three storage locations arranged in a triangle. - the gas distribution taps of the gas cylinders are fluidically connected to the N0 / N2 mixture supply device by flexible pipes so as to supply the device with N0 / N2 mixture and preferably with oxygen.

[0014] The invention also relates to the use of a mobile trolley according to the invention for transporting one or more cylinders of pressurized gas, such as a NO / N2 mixture and / or oxygen, and preferably a gas supply apparatus, typically NO (i.e. NO / N2 mixture) intended to be administered to an adult, child or newborn patient suffering from PPHN, ARDS, HP or another pathology, via a respiratory circuit supplied with a gas containing at least 21% vol of oxygen, such as air or an N2 / O2 mixture, coming from a medical ventilator.

[0015] The invention will now be better understood thanks to the following detailed description, given for illustrative but non-limiting purposes, with reference to the appended figures among which:

[0016] [Fig-1] schematizes an embodiment of a mobile trolley according to the invention according to a rear ¾ view.

[0017] [Fig.2] represents a flexible fabric strap according to the prior art.

[0018] [Fig.3] to [Fig.10] represent an embodiment of a connection device to rigid strap elements according to the invention, used for securing the gas bottles to the trolley of [Fig.l].

[0019] [Fig.l] shows schematically an embodiment of a mobile trolley 1 according to the invention, intended for a hospital environment or the like, which is designed to be easily moved on the ground, i.e. rolled, when it is maneuvered, typically pushed or pulled, by a healthcare personnel, for example a doctor, a nurse or the like, within a hospital building or the like.

[0020] In [Fig.l], the trolley 1 is equipped with its equipment, in particular 3 gas bottles 50, 50.1, 50.2 and a gas supply device 80, here for supplying NO.

[0021] It comprises a front side and a rear side. The rear side is the one facing the user, when the latter pushes the trolley 1 to move it by rolling on the ground, that is to say the side where the box 9 is located, while the front side of the trolley 1 is the one located where the 50 gas bottles are.

[0022] The mobile trolley 1 of the invention comprises, in the lower part, a base 2 or chassis comprising several casters 3, namely here two pairs of casters, used to move the trolley 1 by rolling on the ground. The casters 3 are small wheels which are arranged, in a pivoting manner, on expansions 7 of the base 2 forming legs or the like. The expansions 7 are formed in one piece with the rest of the base 2, for example by injection molding or other, for example formed of polymer.

[0023] Preferably, the casters 3 comprise a locking device, such as a brake or the like, allowing them to be locked in order to prevent their rotation, which makes it possible to immobilize the trolley 1 on the ground and therefore to avoid any involuntary or untimely movement thereof. The activation or, conversely, the deactivation of the caster locking device is done by means of a control pedal (not visible because it is on the rear side) which can be actuated or the like by the user, in particular when he presses on it with his foot.

[0024] More precisely, the base 2 comprises several storage locations 8, on the front side of the carriage 1, used to house the gas cylinders 50, namely here two cylinders 50.1 containing an NO / N2 mixture, for example an NO / N2 mixture containing from 100 to 1000 ppm of NO and nitrogen for the remainder, and a cylinder 50.2 containing gaseous oxygen.

[0025] The gas cylinders 50 have a cylindrical body and generally a bullet shape. They are for example made of aluminum alloy, composite materials or steel. Each cylinder 50 is equipped with a gas distribution valve (not visible), for example a valve with integrated pressure regulator or RDI or a conventional valve, arranged at its neck comprising the orifice communicating fluidly with the internal volume of the cylinder, and preferably with a protective cover 51 serving to protect the gas distribution valve against impacts in particular. The gas distribution valves of the gas cylinders are usually fluidically connected to the gas supply device 80 by flexible pipes to supply it with NO / N2 mixture and oxygen.

[0026] The storage locations 8 of the base 2 each comprise a small platform, for example in the form of a disc, on which each gas bottle 50 rests, in an upright position.

[0027] The carriage 1 further comprises a support structure 4 projecting upwards from the base 2, i.e. (approximately) vertically along the vertical axis (AA) of the carriage 1. Here, the support structure 4 comprises a rear column 4.2 and a front column 4.1, arranged in parallel with each other, and offset from each other, i.e. slightly spaced apart, for example from a few centimeters to a few tens of centimeters. timers according to the size of the trolley 1. Using two parallel columns 4.1, 4.2 increases the strength and robustness of the assembly.

[0028] A storage box 9 is arranged along the support structure 4, in particular along the rear column 4.2. The storage box 9 extends substantially between the base 2 and the tray structure 9, that is to say it projects upwards from the base 2 along the vertical axis (AA) of the trolley 1. The box 9 advantageously has a flattened shape to limit the overall size and can be made of polymer or composite. It comprises one or more internal compartments for storing medical equipment, such as accessories used for care, various utensils, such as gas administration kits, breathing masks or tracheal tubes, pipes, connectors, etc., documents, such as instructions for use of the device 80, or others. The front facade (not visible) of the box 9 may include one or more doors, for example pivoting or tilting, providing access to the internal storage compartments.

[0029] A tray structure 5 is arranged at the upper end of the support structure 4, which carries a handle 5.1 for manual gripping 10 intended to be grasped manually by a user to maneuver and guide the trolley 1 during its movements on the ground. The tray structure 5 can form a tray, bin or the like used to receive small materials, utensils, documents or other items, which can be used during the treatment of the patient.

[0030] Furthermore, a mast 6 carried by the tray structure 5 or by the support structure 4 projects upwards, i.e. along the vertical axis (AA), and carries the gas supply apparatus 80, in particular here an NO / N2 mixture supply apparatus. The apparatus can be fixed there via a support plate 6.1, for example of the VESA (Video Standards Electronics Association) type.

[0031] In order to increase the strength of the carriage 1, the main column or rear column 4.2 and the secondary column or front column 4.1 may be secured to each other, typically at their upper ends, by means of an anchoring structure (not visible), for example a plate or the like. The anchoring structure may carry, comprise or constitute the tray structure 5.

[0032] Conventionally, the gas supply apparatus 80 is intended to be fluidically connected, during the treatment of a patient, to the patient circuit fluidically connecting a medical ventilator to a respiratory interface, such as a mask or a tracheal tube, delivering the gas, for example a gas mixture based on NO, oxygen and nitrogen, to the airways of the patient to be treated. The gas supply apparatus 80 is supplied with gas, in particular NO / N2, by the cylinder(s) 50, 50.1, 50.2, and with O2 by the O2 cylinder 50.2, via flexible gas delivery pipes coming connect to the outlet fittings of the gas distribution taps fitted to these 50, 50.1, 50.2 bottles.

[0033] As visible in [Fig.l], the gas cylinders 50 must be held in place on the carriage 1 by means of attachment or fixing devices 30 fixed to the support structure 4, in particular to the columns 4.1, 4.2. In general, several fixing devices 30 are provided per cylinder 50, typically 2 fixing devices 30, holding upper and lower zones or regions of the body of each cylinder 50. Their vertical positioning on the columns 4.1, 4.2 can be fixed or axially adjustable (XX) in order to be able to firmly and effectively fix cylinders 50 of different sizes.

[0034] Attaching or fixing the gas bottles 50 makes it possible to prevent them from falling, in particular during movements of the trolley 1, thus improving the safety of use of the trolley 1.

[0035] Conventionally, as fastening devices 30, flexible straps 100 are used, i.e. non-rigid, formed from a strip 101 of flexible fabric equipped with a connector 102, as illustrated in [Fig.2]. However, using such straps 100 is not practical, in particular because of their flexibility which means that they tend to get lodged behind the bottles 50, which complicates the task of the user when he wishes to attach them, therefore wasting his time, with the risk that a bottle could tip over while it is not attached. In addition, they are difficult to clean and disinfect because of the fabric they are made of. In addition, they are subject to faster wear if they are not used carefully and poorly maintained over time.

[0036] In order to overcome these problems, according to the invention, the mobile trolley 1 is equipped with several attachment or fixing devices 30 which are not flexible fabric straps as illustrated in [Fig.2], but elements or sections of strap made of semi-rigid polymer material, as illustrated in [Fig.3] to [Fig.10].

[0037] These fixing devices 30 or attachment devices are arranged on the support structure 4 and allow the gas bottles 50, 51 to be fixed or attached to the support structure 4, in particular to the rear column 4.2 and front column 4.1. Preferably, each gas bottle 50, 51 is held, that is to say fixed or attached, by a pair of fixing devices 30 which are arranged spaced apart from each other, for example spaced apart by a few tens of centimeters, in order to ensure support in different areas of each bottle 50, 51, typically at the top and bottom of the cylindrical body of each bottle 50, 51.

[0038] Each fastening device 30 comprises a first strap element 31 comprising a first free end 31.1, and a second strap element 32 comprising a connection device 20, the first 31 and second 32 strap elements strap cooperating with each other, via the first free end 31.1 and the connection device 20 which cooperate with each other to ensure their mechanical connection.

[0039] More specifically, the connection device 20, one embodiment of which is shown in [Fig.6], comprises a main body 21 crossed by an internal passage 22 extending between an inlet 22.1 and an outlet 22.2 of the passage. The internal passage 22 is configured to house at least a portion of the first strap element 31 which is shaped and / or sized to be inserted by the user, according to a translational movement, into the internal passage 22 of the body 21 of the connection device 20.

[0040] The connection device 20 can be secured to the second 32 strap element by screwing, riveting, gluing or the like.

[0041] The connection device 20 further comprises locking means 23 which are movable between (at least) two positions, namely a locking or locking position and a release or unlocking position.

[0042] In the blocking or locking position, the blocking means 23 cooperate with the first strap element 31 inserted in the internal passage 21, to prevent or oppose any movement of withdrawal of the first strap element 31 from the internal passage 21, i.e. to prevent any translational withdrawal by the user, of the first strap element 31 from the internal passage 21. This makes it possible to fix, i.e. to attach, and / or hold, securely the bottles 50, 51 to the trolley 1, as illustrated in [Fig. 3] showing the first and second strap elements 31, 32 assembled to each other so as to securely hold / fix the gas bottle 50.

[0043] Conversely, in the release or unlocking position, the locking means 23 allow a movement, i.e. a displacement, of the first strap element 31 in the internal passage 21, i.e. the locking means 23 do not or no longer oppose, in the release position, a withdrawal (or even continuing an insertion) in translation by the user, of the first strap element 31 from the internal passage 21. This makes it possible in particular to disassemble the first and second strap elements 31, 32 from each other, as illustrated in [Fig. 4] or [Fig. 5], and therefore to release the bottles 50, 51 when it is desired to remove them from the carriage 1, for example to replace an empty bottle with a bottle full of gas.

[0044] Release means 24, actuable by the user, are also provided on the connection device 20, which make it possible to move from the locking position to the release position, when they are actuated by the user, for example when the user presses on them, as illustrated in [Fig.6].

[0045] The release means 24 comprise, for example, a push button or the like pressing on the release means 24 to move them into the release position, when the user exerts an action, for example pressure digital, on said release means 24, for example a push button or the like.

[0046] The release means 24 are normally in a rest position when the locking means 23 are in the locking position. After release, for example at the end of the user's digital pressure, the release means 24 can be returned to their rest position by elastic return means, such as a spring (or springs).

[0047] Preferably, the first and second strap elements 31, 32 are made of a semi-rigid polymer material, for example polyurethane or polyamide, in particular Nylon®. Using such a material makes it possible to give the strap elements 31, 32 sufficient elasticity to make them fit the external contour of the gas cylinder bodies when they are tightened around the cylinders and, conversely, also to give them a certain hold preventing them from sagging or the like when they are detached, for example in the absence of a cylinder or before fixing the cylinders, so as to facilitate fixing, that is to say their joining to one another.

[0048] The first 31 and second 32 strap elements typically have a strip or ribbon shape, as illustrated in particular in [Fig. 10] which shows an embodiment of the first strap element 31. They therefore comprise two opposite faces or surfaces 312, 313, as visible in [Fig.7] and [Fig.8], namely an outer face directed towards the outside and an inner face directed towards the gas cylinder.

[0049] More precisely, to improve the firm and integral holding of the first strap element 31 in the housing formed by the internal passage 21, in particular to prevent untimely sliding of the latter in the direction of withdrawal from the internal passage 21, when a bottle exerts a pushing force on it, there is preferably provided (at least) a textured region in relief 310 on one 312 of the faces of the first strap element 31, as shown diagrammatically in [Fig. 7] to [Fig. 10].

[0050] The locking means 23 cooperate, in the locking position, with this textured region in relief 310 of the (each) first strap element 31 in order to prevent in particular the first strap element 31 from being able to slide and / or be extracted unexpectedly from the internal passage 21 in which it is inserted and held by the locking means 23, when they are in the locking position.

[0051] As shown schematically (side sectional views) in [Fig.8] and [Fig.9], the textured region in relief 310 comprises a succession of grooves 311, preferably rectilinear, which are arranged in parallel with each other.

[0052] These grooves 311 form an alternation of peaks or summits 314 and valleys or hollows 315, as visible in [Fig.8] and in [Fig.9] which is a partial and enlarged view of grooves 311. Each groove 311 has (sectional view) a front side 311.1 forming an inclined ramp directed towards the first free end 31.1 of each first strap element 31, and a rear side 311.2 (substantially) vertical, located opposite the front side 311.1.

[0053] Preferably, the angle A formed at the vertex 314 separating the front side 311.1 and the rear side 311.2 is between 30 and 60°, preferably of the order of 40 to 50°.

[0054] The front 311.1 and rear 311.2 sides of the same groove 311 meet at the top 314 of the groove 311 considered, while a groove 311 is separated from the following groove 311 by a valley 315. Preferably, the height H of a groove 311 is less than or equal to 5 mm, typically between 1 and 3 mm.

[0055] As shown schematically in [Fig. 10], the grooves 311 are arranged parallel to each other, perpendicular to the axis (XX) of the first strap element 31. The external face 312 of the first strap element 31 typically comprises several dozen grooves 311. Conversely, the internal face 313 of the first strap element 31 is preferably smooth, that is to say devoid of grooves 311.

[0056] Each first strap element 31, including the raised textured region 310, is preferably formed in one piece by injection molding or the like, of polymer material.

[0057] As can be seen, the textured region in relief 310 is located at least on the side of the first free end 31.1 of each first strap element 31 and extends over a major part of the external face 312 of the first strap element 31, that is to say at least 40 to 50% of the external surface. Thus, in [Fig. 10], it can be seen that the textured region in relief 310 extends, in the embodiment presented, over at least 75% here, or even at least 80%, of the surface area of ​​the external face 312 of the first strap element 31.

[0058] The first strap element 31 of [Fig. 10] has the shape of an elongated strip comprising a rear end 31.2, here widened, forming a fixing head, crossed by a fixing orifice 31.3 serving for fixing the first strap element 31 to the support structure 4, for example by screwing using a screw or the like inserted into said fixing orifice 31.3, in particular to one or other of the rear or front columns 4.1, 4.2 of the support structure 4.

[0059] The second strap element 32 has a similar structure, namely an elongated strip shape comprising an upstream end 32.1 similar or identical to the rear end 31.2 of the first strap element 31 to allow, again, to the support structure 4, for example by screwing using a screw or the like.

[0060] [Fig.7] schematizes the structure and operation of the connection device 20 of the second strap element 32 when it cooperates with the first strap element 31 to ensure a fixing, that is to say a fastening, of a gas bottle 50 to the trolley 1.

[0061] As already explained, we see the main body 21 which is crossed by the internal passage 22 extending between an inlet 22.1 and an outlet 22.2 of passage, which serves as a housing, in which the first strap element 31 can be inserted by the user, according to a translational movement going from left to right on [Fig.7], that is to say in the direction of the arrow F giving the direction of insertion, via the passage inlet 22.1.

[0062] Once the first strap element 31 is inserted into the internal passage 22, the movable locking means 23 are in their locking position, as illustrated in [Fig.7], and cooperate with the first strap element 31, in particular the textured region 310 carried by the external face 312 of the first strap element 31, to prevent or oppose any movement of withdrawal of said first strap element 31 within the internal passage 21, namely any withdrawal of the first strap element 31, in the withdrawal direction which is opposite to the insertion direction (arrow F).

[0063] In this locking position, the locking means 23 press on the textured region 310 carried by the external face 312 of the first strap element 31, via a proximal part forming a locking cam element 230.

[0064] In other words, the locking means 23 comprise a locking cam element 230 which is inserted into one of the valleys 315 located between two successive grooves 311 to prevent the first strap element 31 from being withdrawn from the internal passage 22, given that the locking cam element 230 then comes into abutment against the wall of the vertical rear side 311.2 adjacent to the valley 315 in which the locking cam element 230 is housed. This abutment prevents translational withdrawal (direction opposite to arrow F) but can allow an insertion movement to continue since, in this case, the locking cam element 230 can slide along the ramp or slope of the other groove 310, i.e. in the direction of insertion given by the arrow F, until it passes into the next valley 315, or even one or more other valleys. 315, so as to increase the tightening, as explained below.

[0065] Indeed, the more the first strap element 31 is inserted by translation into the internal passage 22 of the connection device 20 of the second strap element 32 (as illustrated in [Fig.3]), the more it is possible to increase the tightening operated by the fixing device 30, that is to say attachment, on the body of the gas cylinder 50 which is retained by the fixing device 30 in question.

[0066] When the gas bottle 50 is empty and needs to be replaced, it is necessary to loosen the fixing device 30 and open it by separating the two strap elements 31, 32 from each other, i.e. by extracting the first strap element 31 from the internal passage 22 of the connection device 20 of the second strap element 32, as illustrated in [Fig.4] or [Fig.5]. To do this, the locking means 23 must move into their release position, in which a movement of the first strap element 31 in the internal passage 21, in particular a translational withdrawal of the first strap element 31 from the internal passage 21 of the connection device 20 of the second strap element 32.

[0067] The transition from the locking position to the release position is made by the user pressing on the release means 24, actuable by the user, such as a push button 24.1 or the like. These release means 24 then move from a rest position to an actuated position. When they are actuated, the release means 24 move into the actuated position and then cooperate with the locking means 24, for example pressing on them, to make them move from the locking position to the release position, for example by pivoting or tilting about an axis XX or according to another movement.

[0068] In the release position (not shown), the locking means 24 cease to cooperate with the textured region 310 carried by the external face 312 of the first strap element 31. More precisely, the locking cam element 230 is then removed from the valley 315 between two successive grooves 311 in which it was located, which then allows removal of the first strap element 31 from the internal passage 22, since the locking cam element 230 ceases to be in abutment against the wall of the vertical rear side 311.2 adjacent to the valley 315 in which it was housed. An extraction movement is then possible given that the locking cam element 230 is then positioned “above” the grooves 310, that is to say that it is moved away from the textured region 310 and no longer presses on it.

[0069] When the user stops pressing the release means 24, such as the push button 24.1, these can return to their rest position, i.e. their non-actuated position, by being returned by return means, for example one or more elastic elements 26, such as one or more return springs or the like. The travel of the release means 24 between their rest position and their actuated position is shown diagrammatically in [Fig.7] by the double arrow FL

[0070] Of course, any other locking / releasing mechanism can be used.

[0071] Preferably, the connection device 20 of the second strap element 32 also comprises tightening means 250 which here comprise a lever element 25 actuable by the user, making it possible to adjust the closing tension of the two strap elements 31, 32 when they have been assembled (as illustrated in [Fig. 3]) and secured to each other, as explained above and illustrated in [Fig. 7].

[0072] According to one embodiment, the lever element 25 of the clamping means 250 is pivotable (double arrow F2) around an axis YY. It comprises a proximal portion 25.1 actuable by the user to pivot it and a distal portion 25.2 coming also cooperate with the textured region 310 of the first strap element 31 when the latter is housed in the internal passage 22 of the connection device 20 of the second strap element 32.

[0073] This distal portion 25.2 comes to bear, that is to say in abutment, against the wall of the vertical rear side 311.2 of one of the grooves 310, and to exert there a thrust force in the direction of the arrow F, that is to say in the direction of the insertion of the first strap element 31, which then causes the first strap element 31 to advance within the internal passage 22 of the connection device 20, thus increasing the tightening of the fixing assembly.

[0074] Although the locking means 24 are in the locking position, during the actuation of the tightening means 250, namely of the pivoting lever element 25 by the user, that is to say during tightening, the translational movement of the first strap element 31 is not prevented because, as already explained, the locking cam element 230 can slide along the ramps 311.1 carried by the grooves 310 which are juxtaposed to each other, which allows progression of the first strap element 31 in the direction of insertion (arrow F), given that the locking cam element 230 can progress by passing successively from one valley 315 to another.

[0075] When the pivoting lever element 25 of the clamping means 250 is released by the user, it ceases to cooperate with the textured region 310 of the first strap element 31 and returns to its rest position, as shown in [Fig. 6]. Its return to the rest position can be done, here again, via return means, for example one or more additional elastic elements 27, such as one or more return springs or the like.

[0076] In other words, the tightening means 250 of the fixing device 30, when they are actuated by the user, cooperate with the textured region in relief 310 of the first strap element 31, when the first strap element 31 is inserted into the internal passage 21 of the connection device 20 and the locking means 23 are in the locking position, so as to advance in translation, the first strap element 31 within the internal passage 21 of the connection device 20, in the direction of insertion (arrow F) and thus increase the tightening of the gas bottle 50 held by the fixing device 30.

[0077] It can be seen in [Fig.6] that the proximal portion 25.1 actuable by the user of the lever element 25 has, in the embodiment presented, a loop shape 250.1 connected to the distal portion 25.2 (not visible) by a joining portion 250.2, such as a band-shaped portion or the like.

[0078] Generally speaking, the trolley 1 is particularly well suited to use in a hospital environment, in particular in the context of implementing therapeutic treatment for an adult, adolescent, child or newborn patient suffering from a pulmonary pathology, such as PPHN, ARDS or HP in cardiac surgery, with ad administration by inhalation of gaseous NO to the patient in need, so as to dilate their pulmonary vessels and thus increase blood oxygenation by improving pulmonary gas exchange.

Claims

Claims

1. Mobile trolley (1) comprising: - a base (2) configured to house at least one gas bottle (50) - several wheels (3) to move the trolley on the ground, - a support structure (4) projecting upwards from the base (2), and - at least one fixing device (30) arranged on the support structure (4) for fixing said at least one gas bottle (50) to said support structure (4), wherein said at least one fastening device (30) comprises a first strap element (31) comprising a first free end (31.1), and a second strap element (32) comprising a connection device (20), said first strap element (31) cooperating with the second strap element (32) to allow them to be secured to each other when the first free end (31.1) of the first strap element (31) cooperates with the connection device (20) of the second strap element (32), characterized in that the first strap element (31) and second strap element (32) are made of semi-rigid polymer material.

2. Trolley according to claim 1, characterized in that the connection device (20) of the second strap element (32) comprises: - a main body (21) crossed by an internal passage (22) extending between an inlet (22.1) and an outlet (22.2), and configured to house at least part of the first strap element (31), - locking means (23) movable between at least two positions, comprising: • a locking position in which the locking means (23) cooperate with the first strap element (31) inserted in the internal passage (21), to prevent or oppose any movement of withdrawal of said first strap element (31) from the internal passage (21), and • a release position in which the locking means (23) allow a withdrawal movement of the first strap element (31) in said internal passage (21), - and release means (24), actuable by the user, cooperating with the locking means (23) to move them from the locking position to the release position, when they are actuated by the user.

3. Trolley according to claims 1 and 2, characterized in that the first strap element (31) is configured to be inserted, via its first free end (31.1), into the internal passage (22) of the connection device (20) of the second strap element (32), via the inlet (22.1) of said internal passage (22) of the connection device (20), via a translational movement.

4. Trolley according to claim 2, characterized in that in the locking position, the locking means (23) cooperate with a textured region in relief (310) of the first strap element (31).

5. Trolley according to claim 4, characterized in that the textured region in relief (310) comprises a succession of grooves (311) arranged in parallel to each other, preferably rectilinear grooves (311).

6. Trolley according to claim 5, characterized in that the grooves (311) each have a front side (311.1) forming a ramp and a vertical rear side (311.2), separated by a top (314).

7. Trolley according to claim 4, characterized in that the textured region in relief (310) is carried on an external face (312) of the first strap element (31).

8. Trolley according to one of claims 4 or 5, characterized in that it comprises clamping means (250), actuable by the user, configured to cooperate with the textured region in relief (310) of the first strap element (31), when the first strap element (31) is inserted into the internal passage (21) of the connection device (20) of the second strap element (32) and the locking means (23) are in the locking position, so as to advance in translation, when they are actuated by the user, the first strap element (31) within the internal passage (21) of the connection device (20), in the direction of insertion.

9. Trolley according to claim 8, characterized in that the clamping means (250) comprise a lever element (25).

10. Use of a mobile trolley (1) according to one of the preceding claims, for transporting one or more gas cylinders containing a NO / N2 mixture and / or oxygen.