EP1824724B1 - Fauteuil roulant pliable et plaque d'axe associee - Google Patents

Fauteuil roulant pliable et plaque d'axe associee Download PDF

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Publication number
EP1824724B1
EP1824724B1 EP05812565A EP05812565A EP1824724B1 EP 1824724 B1 EP1824724 B1 EP 1824724B1 EP 05812565 A EP05812565 A EP 05812565A EP 05812565 A EP05812565 A EP 05812565A EP 1824724 B1 EP1824724 B1 EP 1824724B1
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EP
European Patent Office
Prior art keywords
axle
wheelchair
axle plate
frame member
cross brace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP05812565A
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German (de)
English (en)
Other versions
EP1824724A2 (fr
EP1824724A4 (fr
Inventor
Philip H. Schreiber
Michael Knopf
Errol Marklein
Steven L. Lindquist
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Sunrise Medical HHG Inc
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Sunrise Medical HHG Inc
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Publication date
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Publication of EP1824724A2 publication Critical patent/EP1824724A2/fr
Publication of EP1824724A4 publication Critical patent/EP1824724A4/fr
Application granted granted Critical
Publication of EP1824724B1 publication Critical patent/EP1824724B1/fr
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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/08Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/08Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0808Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
    • A61G5/0816Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair
    • A61G5/0825Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair comprising a scissor-type frame, e.g. having pivoting cross bars for enabling folding
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10Parts, details or accessories
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10Parts, details or accessories
    • A61G5/1054Large wheels, e.g. higher than the seat portion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10Parts, details or accessories
    • A61G5/1097Camber- or toe-adjusting means for the drive wheels
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10Parts, details or accessories
    • A61G5/12Rests specially adapted therefor, e.g. for the head or the feet
    • A61G5/128Rests specially adapted therefor, e.g. for the head or the feet for feet

Definitions

  • This invention relates to a foldable wheelchair according to the pre-amble of claim 1.
  • a conventional wheelchair typically has a pair of side frames that includes front and rear side frame members and upper and lower side frame members arranged to form a generally rectangular frame structure, which is typically oriented in a substantially vertical orientation.
  • the left and right side frames may be connected together by two or more cross braces to allow the wheelchair to fold such that the left and right side frames move together to create a narrow folded structure.
  • Each cross brace typically has a lower pivot that pivots about or near a lower side frame member of a corresponding one of the left and right side frames.
  • the cross braces cross one another at a cross brace pivot point and pivot with respect to one another about a central longitudinal pivot axis.
  • cross brace linkages In order to control the folding kinematics of the wheelchair, two cross brace linkages are typically employed.
  • the cross brace linkages have upper ends that pivot about longitudinal axes at or near the upper side frame members. Lower ends pivot about longitudinal pivot axes on the cross braces.
  • the cross braces linkages restrict folding motion to a single degree of freedom, making it easy to fold the wheelchair in a single motion.
  • the resulting folding kinematics is such that the left and right wheelchair side frames remain parallel when the wheelchair is unfolded and are generally parallel when the wheelchair is folded.
  • Left and right seat frame members are typically supported by upper ends of the cross braces so that the seat frame members reside next to and substantially parallel to the upper side frame members when the wheelchair is unfolded.
  • an upholstery seat sling is secured between the left and right seat frame members to form a seat surface for supporting a wheelchair occupant.
  • left and right backrest frame members are typically secured to the side frames and flexible backrest upholstery is secured between these backrest frame members. This upholstery forms a backrest surface for supporting the occupant's back.
  • the side frames are supported by drive wheels, usually located at the rear of the wheelchair, and by casters, usually located at the front of the wheelchair.
  • the lower frame members typically extend longitudinally from the drive wheels to the casters.
  • connecting members may connect the lower frame members to the drive wheels or casters.
  • Mounting assemblies are commonly employed for mounting the drive wheels and the casters on the side frames. Such assemblies typically incorporate a number of adjustment that allow the wheelchair occupant to customize the wheelchair to his or her anthropometry or driving condition. Some mounting assemblies are adjustable to allow the height of the drive wheels and the casters to be varied. Mounting assemblies provide the ability to adjust the camber of the drive wheels (i.e., the angle of the drive wheels with respect to a vertical plane). For example, a wheelchair with a large camber angle has more responsive turning while a wheelchair with a little or no camber angle has a smaller overall width and thus greater maneuverability in tight confines. Mounting assemblies also provide the ability to adjust the fore and aft positions of the drive wheels with respect to the wheelchair frame.
  • Such adjustment is known as a center-of-gravity adjustment. For example, moving the drive wheels rearward produces a more stable wheelchair that is less likely to tip backwards while moving the drive wheels forward makes the wheelchair easier to balance on the drive wheels. This helps with maneuverability over obstacles, such as curbs, where the wheelchair occupant must lift the casters off the ground in order to traverse the obstacle.
  • mounting assemblies permit the drive wheels to be adjusted laterally with respect to the side frames. Such adjustment allows the wheels to be properly spaced as close as possible to the side frame, while still providing clearance to accommodate optional accessories, such as side guards or armrests. Having the wheels spaced closer to the side frame creates a narrower overall width, allowing the occupant to enter narrow confines.
  • foldable wheelchairs often have side frames that do not remain parallel throughout the folding motion of the wheelchair.
  • the upper side frame members are further apart than the lower side frame members.
  • This non-parallel arrangement has the effect of causing upper ends of the backrest members to separate wider than the overall width of the unfolded wheelchair.
  • This, in turn, causes the backrest upholstery to overstretch beyond the width of the wheelchair.
  • Providing additional slack in the backrest upholstery to accommodate this condition is undesirable because the backrest upholstery should be taut when the wheelchair is unfolded.
  • This overstretching of the backrest upholstery makes it difficult to fold and unfold the wheelchair, and tends to overstress components of the wheelchair that support the folding pivot axes. As a result, certain components are reinforced and made heavier to deal with this stress, which further adds to the weight and the cost of the wheelchair.
  • foldable wheelchairs typically have upper and lower side frame members that which contribute to the overall height of the side frames.
  • the height of such wheelchairs is typically so tall that it is difficult to transfer the folded wheelchair over the user's lap when loading and unloading the wheelchair into and out of a car when the user is sitting in the driver's seat.
  • Still another example of problems associated with wheelchairs is with regard to the cambered drive wheels, which encounter a change in camber axes when the height of the drive wheels or casters is varied. This causes the drive wheels to toe in or toe out. That is to say, the drive wheels become misaligned with respect to the plane of a supporting surface. This misalignment is undesirable because it increases rolling friction. If the drive wheels are raised or the casters are lowered, the drive wheels will toe out. Conversely, if the drive wheels are lowered or the casters are raised, the drive wheels will toe in. This occurs because the axis of the camber is no longer aligned horizontally. To correct this, the mounting assemblies that attach the drive wheels to the side frames must allow the axles of the drive wheels to rotate in order to re-align the camber angle with respect to horizontal.
  • US 4,934,722 discloses a folding wheelchair including a pair of side frames.
  • Each side frame includes a bottom generally horizontal strut. Projecting upwardly from the front end of the bottom strut is a front vertical tubular strut. Adjacent the rear end of the horizontal tubular strut there is secured a rear vertical tubular strut, terminating in an upper vertical extension. Extending between the front vertical tubular strut and the upper vertical extension is an upper horizontal seat strut. Below the seat strut, there is affixed a horizontal guide rod that also extends between the front vertical strut and the upper vertical extension. Stretching between the upper horizontal seat struts is a seat of any conventional pliable and foldable material.
  • Rear wheels have their axles each mounted on an axle plate.
  • the axle plates are slidable on the bottom horizontal tubular strut and horizontal guide rod.
  • Interconnecting the side frames are foldable brace means.
  • the foldable brace means includes a pair of pivot link arms projecting from pivot mounts secured on the inside surface of each of the axle plates. Each arm terminates adjacent each other in pivot ends secured to a tie bar. Also secured to the tie bar by pivot pins are tie rods.
  • the tie rods each extend to a respective side frame and are pivotably secured to the respective frames to the extension depending from the horizontal guide rod.
  • US 4,682,783 discloses a foldable wheelchair consisting of two lateral frames.
  • Each frame consists of a frame corner part and of a frame leg, each frame leg including a segment extending approximately parallel to the direction of travel, which in turn is secured with one end thereof to the corner frame part and with the other end thereof changes over into a downwardly bent section.
  • the drive wheels are adjustably anchored with their wheel axles in the corner frame parts.
  • the folding mechanism of the wheelchair consists of pivoting means, such as two frame joints.
  • An upper frame joint consists of two rods or bars, foldable towards one another around a frame joint rotation axle, whose pivoting axles are implemented by pins which are anchored in the frame corner parts.
  • US 4,989,890 discloses a wheelchair including a pair of length-adjustable side frames which are disposed longitudinally in a parallel relationship to each other.
  • a width-adjustable cross-brace folding assembly interconnects the side frames.
  • Each side frame assembly includes a forward frame portion which is telescopically received in a rearward frame portion to define a length adjusting means.
  • the forward frame portion includes upper and lower horizontally extending tubes, which are telescopically received with rear side frame portions horizontally extending tubes, respectively.
  • the horizontally extending rear frame tubes are interconnected by a first generally vertical tube portion and an aft generally vertical tube portion.
  • the adjustable cross brace folding assembly includes a first multi-piece cross brace member and a second multi-piece cross brace member which are interconnected by a pivot assembly.
  • the first cross brace member is connected at a lower end to a first pivot means which is pivotally received on the lower side frame portion.
  • the position of the first pivot means on the side frame is fixed at the rear by abutting the rear lower side frame horizontal member and at the front by a collar which is clamped to the forward side frame portion lower tubular member.
  • the first cross brace member further includes a first upper portion which is interconnected with a first seat supporting member.
  • a first link is pivotally connected at one end with the first cross brace member and is pivotally mounted on the forward upper horizontal frame portion.
  • a rear wheel mounting assembly includes a slotted plate which is selectively mounted in matching apertures of the rear frame vertical tubes. The plate further includes an elongated slot through which a wheel axle assembly is mounted.
  • the present invention relates to a wheelchair as defined in claim 1.
  • Fig. 1 is a side perspective view of a wheelchair according to a preferred embodiment of the invention with a drive wheel partially shown in hidden line and a corresponding armrest removed.
  • Fig. 2 is an enlarged partial rear perspective view of the wheelchair of Fig. 1 with the drive wheels and armrests removed.
  • Fig. 3 is an enlarged partial front perspective view of the wheelchair of Fig. 1 with the drive wheels and armrests removed.
  • Fig. 4 is a partial bottom perspective view of the wheelchair of Fig. 1 with the drive wheels removed and at least one armrest removed.
  • Fig. 5 is an enlarged side schematic view in elevation of a portion of the left side frame of the wheelchair of Fig. 1 .
  • Fig. 6 is a rear schematic view in elevation of the portion of the left side frame of Fig. 5 with an upper side frame member shown in hidden line.
  • Fig. 7 is a bottom schematic view of the portion of the left side frame of Fig. 6 .
  • Fig. 8 is a side schematic view in elevation of a portion of a left side frame of a wheelchair according to an alternative embodiment of the invention with an upper side frame member shown in hidden line.
  • Fig. 9 is a perspective view of a wheelchair according to a first embodiment of the present invention shown in an unfolded condition, shown with backrest upholstery, seat upholstery and a left wheel removed for clarity.
  • Fig. 10 is an enlarged perspective view of the wheelchair of Fig. 9 , shown in a folded condition.
  • Fig. 11 is a side view of the wheelchair of Fig. 9 , in elevation, shown with both of the rear wheels removed.
  • Fig. 12 is a rear view of the wheelchair of Fig. 9 , in elevation,
  • Fig. 13 is an enlarged rear view of the wheelchair of Fig. 9 , shown in the folded condition.
  • Fig. 14 is an enlarged rear view of the wheel mount assembly and axle plate of the wheelchair of Fig. 9 .
  • Fig. 15 is a side view of the wheel mount assembly and axle plate of Fig. 14 , showing a wheel mount extension in upright and inverted positions, and an axle sleeve mount in forward facing and rearward facing positions.
  • Fig. 16 is a reduced scale exploded perspective view of the wheel mount assembly and side frame member of Fig. 15 .
  • Fig. 17 is a perspective view of a wheelchair according to another embodiment of the present invention shown in the unfolded condition, shown with the left wheel removed for clarity.
  • Fig. 18 is a side view of the wheelchair of Fig. 17 .
  • Fig. 19 is a reduced scale perspective view of a wheelchair according to yet another embodiment of the present invention shown in the unfolded condition, with backrest upholstery, seat upholstery and left wheel removed and shown with an enlarged portion including an upper frame member and a cradle for supporting a seat frame member.
  • Fig. 20 is a perspective view of seat frame members secured to cross braces using dovetail slots and dovetail nuts.
  • Fig. 21 is an enlarged front elevational view of a seat frame member the cross braces shown in Fig. 20 , with the seat frame member shown in cross-section to clearly show the dovetail slots and the dovetail nuts.
  • Fig. 22 is an enlarged partial perspective view of a wheelchair according to the present invention having cross brace links commonly practiced in the art.
  • Fig. 23 is a perspective view of a wheel mounting assembly according to an alternative embodiment of the invention.
  • Fig. 24 is a partially exploded perspective view of the wheel mounting assembly shown in Fig, 23 .
  • Fig. 25 is a perspective view of a swing away footrest latch according to a preferred embodiment of the invention.
  • Fig. 26 is an exploded perspective view of the swing away footrest latch shown in Fig. 25 .
  • Fig. 27 is a perspective view of a wheel mounting assembly according to another embodiment of the invention taken from the outside of the wheelchair.
  • Fig. 28 is a perspective view of the wheel mounting assembly shown in Fig. 27 taken from the inside of the wheelchair.
  • the description that follows refers to wheelchairs that are left or right, or laterally, symmetric. As such, the description in most cases refers to features on one side of the wheelchair, with the understanding that a substantially identical feature may reside on the opposite side of the wheelchair. Further, similar components of the various embodiment described herein may use the same name and reference number.
  • the wheelchair 10 includes a pair of spaced apart axle plates, namely, a left axle plate 12a and a right axle plate 12b. As will be discussed below, the axle plates 12a and 12b are each secured to a respective upper side frame member 14a and 14b.
  • the wheelchair 10 is generally longitudinally symmetrical, with the right side substantially being the mirror image of the left. Except when otherwise discussed, when a part or component is described on one side, it is to be understood that the wheelchair 10 has similar structure on the opposite side.
  • the wheelchair 10 further includes a pair of seat frame members, such as a left seat frame member 16a and a right seat frame member 16b, and a pair of backrest frame members, such as a left backrest frame member 32a and a right backrest frame member 32b.
  • the seat frame members 16a and 16b are adapted to be supported by upper side frame members 14a and 14b, respectively.
  • the upper side frame members 14a and 14b are provided with couplings, such as the saddles 17a and 17b, shown in Fig. 4 , for supporting the seat frame members 16a and 16b relative to the upper side frame members 14a and 14b.
  • a seat sling 30 extends substantially horizontally between the seat frame members 16a and 16b.
  • the seat sling 30 forms a seat for supporting a wheelchair occupant.
  • a sling 30 is shown, it should be understood that the invention may be practiced with other seat components, such as removable or folding panels (not shown).
  • the backrest frame members 32a and 32b may be secured to the upper side frame members 14a and 14b by brackets 33a and 33b, respectively.
  • a seat back 36 extends substantially vertically between the backrest frame members 32a and 32b and is secured to the backrest frame members 32a and 32b by a plurality of straps 35a and 35b.
  • the backrest frame members 32a and 32b and the seat back 36 may be secured in any suitable manner.
  • the seat back 36 can be adjustable in elevation by raising and lowering the seat back 36 relative to the backrest frame members 32a and 32b.
  • Upper ends of the backrest frame members 32a and 32b may be provided with optional attendant handles 34a and 34b to aid an attendant in maneuvering the wheelchair 10.
  • Drive wheels 52a and 52b support the rear end of the wheelchair 10.
  • the drive wheels 52a and 52b are adapted to be driven by the wheelchair occupant to propel and maneuver the wheelchair 10.
  • axle housings 54a and 54b are provided for mounting the drive wheels 52a and 52b to the axle plates 12a and 12b, respectively, as will be described below.
  • the upper side frame members 14a and 14b are preferably adapted to support wheel guard assemblies 38a and 38b, respectively.
  • the wheel guard assemblies 38a and 38b are secured to the upper side frame members 14a and 14b and to the backrest frame members 32a and 32b preferably by a plurality of threaded fasteners 39a and 39b, and the wheel guard assemblies 38a and 38b are preferably configured to act as armrests, side guards, and wheel guards.
  • the wheel guard assemblies 38a and 38b are sufficiently low to permit a wheelchair occupant to gain access to the drive wheels 52a and 52b, which will be described herein below.
  • the wheel guard assemblies 38a and 38b are provided for support of an occupant's arms, and may also include or incorporate an optional clothing protector, as shown, to protect the wheelchair occupant's person or apparel from being caught in the spokes of the drive wheels 52a and 52b.
  • the footrest assembly 44 may include extension frame members 46a and 46b and a footplate 48.
  • the extension frame members 46a and 46b extend forwardly and downwardly from the upper side frame members 14a and 14b, respectively.
  • the footplate 48 is attached to the lower ends of the extension frame members 46a and 46b.
  • the footplate 48 is attached to the right extension frame member 46b by a pivotal connection, indicated generally at 47, and the footplate 48 is attached to the left extension frame member 46a by a selectively engageable support connection, indicated generally at 49.
  • the footplate 48 may be engaged when the wheelchair 10 is to be in normal use and the footplate 48 may be disengaged when the wheelchair 10 is to be folded.
  • separate or independent lateral leg supports can also be supported by the extension frame members 46a and 46b.
  • Casters 50a and 50b support the front end of the wheelchair 10 relative to a supporting surface.
  • the casters 50a and 50b may be affixed to the wheelchair 10 in any suitable manner.
  • the casters 50a and 50b are preferably joined to the upper side frame members 14a and 14b, by caster housings 51a and 51b, respectively, that are secured to the lower front ends of the upper side frame members 14a and 14b, respectively. Bearings within the caster housings 51a and 51b enable the casters 50a and 50b to swivel about vertical axes for maneuverability of the wheelchair 10.
  • Each axle plate 12a and 12b includes a front axle plate member 61a and 61b, respectively, and a rear axle plate member 63a and 63b, respectively.
  • the front axle plate members 61a and 61b, and the rear axle plate members 63a and 63b have a rectangular cross-sectional shape. It must be understood, however, that the front axle plate members 61a and 61b and the rear axle plate members 63a and 63b can have any suitable cross-sectional shape, such as, square, round, oval or any other suitable shape.
  • the axle plates 12a and 12b are joined to opposite seat frame tubes or members 16b and 16a, respectively, by respective cross brace members 22a and 22b.
  • Lower ends of the cross brace members 22a and 22b are pivotally connected to the front axle plate members 61a and 61b and the rear axle plate members 63a and 63b of the axle plates 12a and 12b by respective hinge assemblies, indicated generally at 65a and 65b.
  • Upper ends of the cross brace members 22a and 22b are connected to opposite seat frame members 16b and 16a, preferably by threaded fasteners 67a, and 67b.
  • the seat frame members 16b and 16a preferably include a plurality of discretely spaced threaded bores 69a and 69b, as shown in Fig.
  • the discretely spaced threaded bores 69a and 69b permit the cross brace members 22a and 22b to be secured to the seat frame members 16b and 16a at a variety of longitudinal locations, thus allowing for adjustment in the placement of the cross brace members 22a and 22b and thus also allowing for adjustment in the placement of the axle plates 12a and 12b.
  • the cross brace members 22a and 22b are pivotally connected to each other by a pivot pin 71 at approximately the middle of the cross brace members 22a and 22b.
  • the cross brace members 22a and 22b are foldable to permit the wheelchair 10 to be folded into a compact form.
  • the wheelchair 10 is foldable into a compact form to permit the wheelchair 10 to be easily transported and stored.
  • the hinge assemblies 65a and 65b are laterally aligned (i.e., positioned and oriented in similar forward to rearward placement and directions).
  • the cross brace members 22a and 22b are also laterally aligned at their respective connections to the seat frame members 16b and 16a and their respective connections to the hinge assemblies 65a and 65b.
  • the cross brace members 22a and 22b are preferably curved, or offset forwardly and rearwardly (i.e., longitudinally), as shown in Fig. 4 , at the pivot pin 71.
  • the cross brace member 22a is curved, or bowed, forward at the pivot pin 71, while the cross brace 22b is curved rearward at the pivot pin 71.
  • the left side frame member 12a generally includes the front axle plate member 61a, the rear axle plate member 63a, the axle housing 54a, the hinge assembly 65a, and a clamp 73a.
  • the side frame members 61a and 63a are shown extending downward from the left upper side frame member 14a, it should be understood the invention may be embodied in other configurations.
  • the clamp 73a includes an outer flange 75a and an inner flange 77a.
  • the flanges 75a and 77a are formed integrally to the front axle plate member 61a and the rear axle plate member 63a.
  • the flanges 75a and 77a form a saddle 79a in the clamp 73a.
  • the saddle 79a is suitable to receive the left upper side frame member 14a.
  • the clamp 73a may further include a pair of threaded fasteners 81a to secure the two flanges 75a and 77a together.
  • the left upper side frame member 14a is disposed in the saddle 79a and the two flanges 75a and 77a surround the left upper side frame member 14a and are secured to each other by the threaded fasteners 81a.
  • the left axle plate 12a is secured to the left upper side frame member 14a by the clamp 73a.
  • the clamp 73a allows for adjustment in the longitudinal position of the left axle plate 12a. It must be understood, however, that the front axle plate member 61a and the rear axle plate member 63a may be secured to the left upper side frame member 14a in any suitable manner, such as by direct welding or nut and bolt fasteners.
  • the axle housing 54a preferably includes an axle tube 83a suitable to receive the axle of the left drive wheel 52a.
  • the front and rear axle plate members 61a and 63a may include a plurality of discretely spaced threaded bores 85a and 87a.
  • a front groove or slot 89a and a rear groove or slot 91a may be formed in the axle housing 54a to receive the front axle plate member 61a and the rear axle plate member 63a, respectively, as shown in Fig. 7 .
  • the axle housing 54a is secured to the front axle plate member 61a and the rear axle plate member 63a by one or more threaded fasteners 93a.
  • axle housing 54a may alternatively be secured to the front axle plate member 61a and the rear axle plate member 63a in any other suitable manner, such as, for example, with rivets, or by welding.
  • the axle housing 54a matingly engages the front axle plate member 61a and the rear axle plate member 63a by a sliding tongue and groove engagement.
  • the axle housing 54a is preferably adjustable as to slide up and down between the front axle plate member 61 a and the rear axle plate member 63a and be secured to appropriate threaded bores 85a and 87a, thus allowing for adjustment of the height of the rear of the wheelchair 10 relative to the drive wheels 52a and 52b.
  • the left axle plate 12a is formed in a substantially rectangular shape. However, it must be understood that the left axle plate 12a may be any suitable shape.
  • the left axle plate 12a forms a substantially H-shaped side frame, and the left axle plate 12a can be the to have no bottom frame member, as shown in Fig. 8 .
  • left axle plate 12a has been described as having the axle housing 54a and the hinge assembly 65a positioned either at the bottom end of the front axle plate members 61a and 63a, as shown in Fig. 5 , or alternatively in the middle of the front axle plate member 61a and 63a from top to bottom, as shown in Fig.
  • axle housing 54a and the hinge assembly 65a thus being equidistant from the left upper side frame member 14a
  • the axle housing 54a and the hinge assembly 65a may be positioned in any suitable equidistant position or alternatively and the axle housing 54a and the hinge assembly 65a may be positioned in any suitable independent or unequidistant position, such as the axle housing 54a being positioned in the middle of the front axle plate member 61a and 63 a from top to bottom, and the hinge assembly 65a being positioned at the bottom end of the front axle plate members 61a and 63a.
  • hinges include two leaves, or wings, with one leaf pivoting with respect to the other leaf about a common axis of rotation, or pin.
  • Each leaf may include one or more fingers or brackets which serve to connect the leaf to an object, or part, which is to pivot with the leaf with respect to the other leaf and another object, or part, connected to the other leaf.
  • the hinge 65a includes a first leaf front finger or bracket 95a and a first leaf rear finger or bracket 97a.
  • the first leaf front finger 95a is secured directly to the front axle plate member 61a, for example, by threaded fasteners 99a.
  • the first leaf rear finger 97a is secured directly to the rear axle plate member 63a, for example, by threaded fasteners 101a.
  • the first leaf front finger 95a includes a first leaf front hinge knuckle portion 103a.
  • a front hinge pin hole or bore 104a expends through the first leaf front hinge knuckle portion 103a.
  • a first end 102a of a substantially longitudinal hinge pin 105a is inserted within the front hinge pin hole 104a and surrounded by the front hinge knuckle portion 103a.
  • the first leaf rear finger 97a includes a first leaf rear hinge knuckle portion 107a.
  • a rear hinge pin hole or bore 108a extends through the first leaf rear hinge knuckle portion 107a.
  • a second end 106a of the hinge pin 105a is inserted within the rear hinge pin hole 108a and surrounded by the rear hinge knuckle portion 107a.
  • the lower end of the cross brace 22a includes a second hinge leaf portion 109a.
  • the second hinge leaf portion 109a includes a second leaf knuckle portion 111a (see Fig. 7 ) that is disposed between the first leaf front hinge knuckle portion 103a and the first leaf rear hinge knuckle portion 107a.
  • a middle hinge pin hole or bore 115a extends through the second leaf knuckle portion 111a.
  • the hinge pin 105a is inserted within the middle hinge pin hole 115a. The hinge pin 105a thus extends longitudinally through the front hinge pin hole 104a, the middle hinge pin hole 115a, and the rear hinge pin hole 108a.
  • the hinge 65a is thus operable to pivot the cross brace 22a with respect to the left axle plate 12a.
  • the hinge 65a may alternatively be formed in any suitable manner.
  • the hinge pin 105a may be formed to the second leaf knuckle portion 111a.
  • the second leaf knuckle portion 111a would not have a middle hinge pin hole 115a and the hinge pin 105a may then be described as two knobs protruding from opposite ends of the second leaf knuckle portion 111a.
  • hinge 65a has been described as including substantially longitudinal hinge pin 105a, it must be understood however that the hinge pin 105a may be oriented in any suitable manner.
  • the hinge pin 105a may be a vertically oriented hinge pin.
  • FIG. 9 through 13 there is illustrated another wheelchair 120 including a pair of side frames 121, drive wheels 122 supporting the rear end of the wheelchair 120, casters 123 supporting the front end of the wheelchair 120, a footrest assembly 124, which is preferably a folding footrest, and backrest frame members 125.
  • a pair of cross braces 126 pivots with respect to the side frames 121 and supports a seat frame member 127 at an upper end thereof.
  • the side frames 121 may include a frame structure 128, which may support a caster 123, the footrest assembly 124, and an axle plate 129.
  • the frame structure 128 may be comprised of a front side frame member 130 and an upper side frame member 131.
  • the axle plate 129 is preferably adjustable fore and aft with respect to the frame structure 128. Such adjustment may be used to achieve course center-of-gravity adjustment of the rear wheels 122.
  • the drive wheel mounting assembly 132 may include a wheel mount extension 133, one or more stiffening blocks 134, an axle sleeve mount 135, a threaded axle sleeve 136, and a locking nut 137.
  • the wheel mount extension 133 is preferably vertically adjustable with respect to the axle plate 129. This allows the rear seat height of the wheelchair 120 to be changed by moving the drive wheel 122 vertically in relation to the side frame 121.
  • the wheel mount extension 133 may be selectively positioned and secured to the axle plate 129 using bolts 138 that pass through longitudinal holes 129a on both legs 129b, 129c of the axle plate 129, and into tapped holes 133a of the wheel mount extension 133.
  • the stiffening blocks 134 may reside between the legs 129b, 129c, and may be secured with the bolts 138 to help stiffen and strengthen the structure.
  • the axle sleeve mount 135 may be fore and aft adjustable with respect to the wheel mount extension 133 to provide fine adjustment of the drive wheel center-of-gravity position.
  • the axle sleeve mount 135 may be selectively positioned and secured to the wheel mount extension 133 using bolts 139 and nut 140 that pass through aligned holes 133b and 135a in the wheel mount extension 133 and the axle sleeve mount 135, respectively.
  • the wheel mount extension 133 may be mounted upright or inverted. This has the advantage of increasing the overall height adjustment of the drive wheels 122, while keeping the height of the axle plate 129 as short as possible.
  • axle sleeve mount 135 may be mounted facing forward or rearward. This has the advantage of increasing the overall center-of-gravity adjustment of the drive wheels 122, while keeping the wheel mount extension 133 as short as possible.
  • the axle sleeve 136 is preferably in threaded engagement with the axle sleeve mount 135. External threads 136a on the major diameter of the axle sleeve 136 may mate with internal threads 135b in the major bore 135c of the axle sleeve mount 135.
  • a drive wheel axle 141 may reside within a bore 136b in the axle sleeve 136. This bore may be oriented at some angle ⁇ , as shown in Fig 14 , with respect to a horizontal threaded axis 142 of the axle sleeve 136. The angle ⁇ of the bore establishes a camber for the drive wheels 122.
  • a locking nut 137 may be in threaded engagement with the axle sleeve 136 to lock the axle sleeve 136 rotationally with respect to the axle sleeve mount 135.
  • a pair of wrench flats 136c may be provided on the axle sleeve 136. This arrangement provides toe in and toe out adjustment and lateral adjustment of the drive wheels 122.
  • the axle nut may be loosened and the axle sleeve 136 may be rotated a prescribed number of complete revolutions within the axle sleeve mount 135 until the drive wheel 122 is properly repositioned.
  • the locking nut 137 may be loosened and the axle sleeve 136 may be rotated a fraction of a turn until the wrench flats are positioned vertically. The locking nut 137 then may be tightened to fix the position of the axle sleeve 136.
  • the lower end of the axle plate 129 is preferably pivotally connected to the lower end of the folding cross brace 126 at a pivot point 126a.
  • the two cross braces 126 are positioned longitudinally with respect to one another and are pivotally connected to one another about a generally longitudinal axis at cross brace pivot point 126c.
  • a cross brace link 143 is pivotally connected at one end at a pivot point 143a to the cross brace 126 and at the opposite end at a pivot point 143b preferably to some mid-height region of the axle plate 129. All of these pivot points 126a, 126c, 143a, 143b have pivot axes that are aligned parallel to the upper side frame member 131.
  • This arrangement of linkages and corresponding pivot axis locations is designed such that the left and right side frames remain parallel when the wheelchair is completely unfolded and completely folded. This arrangement is also designed such that the left and right side frames remain substantially parallel as the wheelchair approaches the unfolded position.
  • Such an arrangement has several advantages. By allowing the two side frames to remain substantially parallel as the wheelchair 120 approaches the unfolded condition, the backrest frame members 125 also remain substantially parallel so that the backrest upholstery does not become overstretched.
  • the lower pivot point 126a of the axle plate 129 may be raised closer to the upper side frame member 131. This arrangement has the advantage of creating a shorter side frame that is more easily transportable, for example, into and out of a car.
  • the seat frame member 127 may be secured to the cross brace 126 using two bolts 144 and two nuts 145.
  • the seat frame member 127 may be adjustable with respect to the cross brace 126 by aligning the holes in the cross brace 126 with a selected pair of holes in a series of holes 127a in the seat frame member 127. This adjustment allows the seat frame member 127 to be repositioned when the axle plate 129 is moved fore and aft for course center-of gravity adjustment.
  • the fact that the seat frame member 127 is secured to the cross brace 126 using fasteners makes it practical to interchange the seat frame member 127 with seat frame members of various lengths on the present wheelchair. Such interchangeability is advantageous because the wheelchair is adaptable for seat depth growth. This growth in seat depth may correspond to growth in backrest depth (not shown) by allowing the backrest to be telescopically adjustable in the longitudinal direction with respect to the upper side frame member 121.
  • cradles 148 may be secured to the upper side frame member 131 that capture and support the seat frame member 127 at forward and rearward locations.
  • cradles allow relative translation of the seat frame member 137 with respect to the upper side frame member 131 along the axis of the seat frame member 127.
  • Such translation creates a flimsy wheelchair structure, allowing the left side frame to twist with respect to the right side frame.
  • a notch 148a is added to the cradles, accompanied by mating protrusions 149 on the seat frame member 127.
  • the notch 148a is shaped to allow the protrusion 149 to freely enter the notch, as the wheelchair is unfolded. When unfolded, the notch captures the protrusion, preventing relative translation of the seat frame member 127 with respect to the side frame 121 along the axis of the seat frame member 127.
  • This arrangement also has the advantage of reducing stresses on other components of the wheelchair structure. In particular, the stresses present in the cross braces and the seat frame members 127 are minimized. This, in turn, allows these structures to be made from thinner walled tubing, thereby reducing the weight of the wheelchair.
  • the feature described above includes a cradle with a notch secured to the upper side frame member 131, and a mating protrusion in the seat frame member 127
  • the mounting location of the cradle and protrusion can be reversed, so that the cradle is inverted and is secured to the seat frame member 127, while the protrusion is secured to the upper side frame member 131.
  • the notch need not be formed in the cradle, but could be formed in the upper side frame member 131. This relation could also be reversed so that the notch could be formed in the seat frame member 127, and the protrusion could be formed in the upper side frame members 131. Any permutation and/or combination of the above relationships that achieves the desired end result of prohibiting relative translation of the seat frame member 127 with respect to the upper side frame member 131 when the wheelchair 120 is unfolded is considered to be within the scope of this invention.
  • the structure and arrangement of the wheelchair frame can be modified to include a lower side frame 150, as depicted in Figs. 17 and 18 .
  • the embodiment also illustrates a swing-away footrest assembly 151 located at the front of the wheelchair.
  • the footrest assembly 151 is intended to be representative of such swing away footrest assemblies currently known in the art.
  • the lower side frame member is connected to the lower end of the axle plate 129 and, in this example, the lower side frame member is coaxial with the lower pivot axis 152 of the cross brace 126.
  • the axle plate 129 is moveable longitudinally with respect to both the upper and lower side frame members to allow for coarse center-of-gravity adjustment of the drive wheels 122.
  • the axle plate 129 lends itself to either embodiment, with or without a lower side frame member.
  • seat frame members 220 that may be secured to cross braces 222 using dovetail slots 224 and dovetail nuts 226.
  • This form of attachment allows the seat frame members 220 to be moved fore and aft with respect to the cross braces 222. It also allows the seat frame members 220 and seat upholstery (not shown) to be easily changed, without having to replace the cross braces 222, in order to accommodate growth in seat depth.
  • cross brace links 230 may employ a methodology, as shown in Fig. 22 , which is commonly practiced in the art.
  • Wheel mounting assemblies 232 may include an axle sleeve 234 that is held with respect to an axle sleeve mount 236 by clamping configuration 238, as shown in Figs. 23 and 24 , instead of having a threaded axle sleeve 136 and nut 137 to adjust inboard and outboard wheel spacing and toe in and toe out, as described above.
  • This configuration 238 may provide the same adjustments, such as wheel spacing and toe in and toe out, as described above.
  • a swing away footrest latch 240 may allow a footrest hanger 242 to swing both inboard and outboard, and lift off of a front side frame member 244 for removal.
  • the swing away footrest latch 240 may include an activation lever 246, which, when pushed, may rotate about a lever pivot 248.
  • Pins 250 on the activation lever 246 may engage with pawls 250 such that, as the activation lever 246 is pushed, the pawls 250 rotate about a pawl pivot 252.
  • the pawls 250 pivot the pawls clear a path around a latch stud 254, allowing the footrest hanger 242 to rotate about a hanger pivot 256.
  • Torsion springs 258 may keep the pawls 250 engaged against the latch stud 254, preventing the footrest hanger 242 from rotating when the activation lever 246 is not pushed, or when the footrest hanger 242 is latched.
  • axle plate 260 is shown in Figs. 27 and 28 .
  • This axle plate 260 is a one-piece axle plate, unlike the axle plate 129, described above, which has two legs 129b, 129c with a spacer 134 therebetween.
  • an alternative axle plate extension 262 is shown attached with two bolts 264 and nuts 266 passing in through the sides of the axle plate 260, as opposed in through the front or rear of the legs 129b, 129c, as described above.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)

Abstract

L'invention concerne un fauteuil roulant pliable comprenant un élément de cadre latéral supérieur s'étendant de manière sensiblement horizontale. Une extrémité d'une plaque d'axe est fixée à l'élément de cadre latéral supérieur. Un logement d'axe est fixé à la plaque d'axe. Une traverse est fixée pivotante directement à la plaque d'axe au niveau de l'extrémité inférieure de la plaque d'axe. Un ensemble support de roue comprend un support de manchon d'axe possédant un filetage intérieur. Un manchon d'axe comporte un filetage extérieur qui entre en prise avec le filetage intérieur du support de manchon d'axe. Le manchon d'axe comporte un alésage intérieur pouvant recevoir un axe de roue. L'alésage intérieur est oblique par rapport à l'axe des filetages extérieurs, ce qui permet de conférer un carrossage à une roue. Le manchon d'axe est conçu pour permettre le réglage latéral de la roue par rotation du manchon d'axe dans le support de manchon d'axe sur un nombre quelconque de révolutions complètes. En outre, ledit manchon d'axe est conçu pour permettre le réglage du pincement et de l'ouverture d'une roue à carrossage par rotation du manchon d'axe dans le support de manchon d'axe sur une fraction d'une révolution complète.

Claims (15)

  1. Fauteuil roulant pliable, comprenant :
    au moins un élément de châssis latéral supérieur (14a, 14b ; 121) ;
    un élément de châssis de siège (16a, 16b ; 127 ; 220) supporté par un élément de châssis latéral supérieur (14a, 14b ; 121) lorsque le fauteuil roulant (10 ; 120) est dans une position dépliée ;
    au moins une plaque support de roue (12a, 12b ; 129 ; 260) ayant une extrémité supérieure et inférieure, l'extrémité supérieure étant fixée sur l'élément de châssis latéral supérieur (14a, 14b ; 121) ; et au moins un croisillon (22a, 22b ; 126 ; 222) ayant une extrémité supérieure et une extrémité inférieure, l'extrémité supérieure étant fixée sur l'élément de châssis de siège (16a, 16b ; 127 ; 220), le croisillon (22a, 22b ; 126 ; 222) étant opérationnel pour pivoter par rapport à la plaque support de roue (12a, 12b ; 129 ; 260),
    caractérisé par une articulation de croisillon fixée directement sur la plaque support de roue, et en ce que l'extrémité inférieure du croisillon (22a, 22b ; 126 ; 222) est fixée de manière pivotante sur la plaque support de roue (12a, 12b ; 129 ; 260) via l'articulation de croisillon, l'articulation de croisillon étant opérationnelle pour faire pivoter le croisillon (22a, 22b ; 126 ; 222) par rapport à la plaque support de roue (12a, 12b ; 129 ; 260).
  2. Fauteuil roulant pliable selon la revendication 1, comprenant :
    une paire d'éléments de châssis latéraux supérieurs espacés (14a, 14b, 121) sur des premier et second côtés opposés du fauteuil roulant,
    une paire d'éléments de châssis de siège espacés (16a, 16b ; 127 ; 220),
    une paire de croisillons (22a, 22b ; 126 ; 222) reliés de manière pivotante ensemble, et
    une paire de plaques support de roue espacées (12a, 12b ; 129 ; 260), où
    l'extrémité inférieure d'un croisillon (22a, 22b ; 126 ; 222) vient en prise de manière pivotante avec une des plaques support de roue (12a, 12b ; 129 ; 260) fixées sur le premier côté, et l'extrémité supérieure du croisillon (22a, 22b ; 126 ; 222) est fixée sur l'élément de châssis de siège (16a, 16b ; 127 ; 220) supporté sur le second côté.
  3. Fauteuil roulant pliable selon la revendication 2, dans lequel les croisillons (22a, 22b ; 126 ; 222) sont incurvés ou sont décalés dans la direction longitudinale du fauteuil roulant au niveau d'un axe d'articulation (71) qui les relie les uns aux autres.
  4. Fauteuil roulant pliable selon la revendication 1, comprenant en outre un dispositif de mise en prise positionné entre l'élément de châssis de siège (16a, 16b ; 127) et l'élément de châssis latéral supérieur (14a, 14b ; 121) de manière à empêcher un déplacement de l'élément de châssis de siège par rapport à l'élément de châssis latéral supérieur lorsque le fauteuil roulant est dans un état déplié.
  5. Fauteuil roulant pliable selon la revendication 4, dans lequel le dispositif de mise en prise comprend une ou plusieurs saillies (149) qui viennent en prise avec une ou plusieurs encoches (148).
  6. Fauteuil roulant pliable selon la revendication 1, comprenant en outre un ou plusieurs berceaux (148) montés sur l'élément de châssis latéral supérieur (121) qui supporte l'élément de châssis de siège (127 ; 220) lorsque le fauteuil roulant est dans un état déplié, l'arceau (148) ayant une ou plusieurs encoches (148a) qui viennent en prise avec une ou plusieurs saillies (149) sur l'élément de châssis de siège (127) lorsque le fauteuil roulant est dans l'état déplié.
  7. Fauteuil roulant pliable selon la revendication 1, dans lequel chaque plaque support de roue (12a, 12b) comprend un élément de plaque support de roue avant (61a, 61b) et un élément de plaque support de roue arrière (63a, 63b), les éléments de plaque support de roue avant et arrière (61a, 61b, 63a, 63b) comprennent une pluralité d'alésages filetés espacés de manière discontinue (85a, 87a), et dans lequel un carter de pont (54a) vient en prise par appariement avec l'élément de plaque support de roue avant (61a) et l'élément de plaque support de roue arrière (63a) par l'intermédiaire d'une mise en prise coulissante de languette et de rainure, de manière à permettre un coulissement vers le haut et vers le bas entre l'élément de plaque support de roue avant (61, 61b) et l'élément de plaque support de roue arrière (63a, 63b) ainsi qu'une fixation sur des alésages filetés appropriés (85a, 87a).
  8. Fauteuil roulant pliable selon la revendication 1, dans lequel l'élément de châssis de siège (16a, 16b) comprend une pluralité d'alésages filetés espacés de manière discontinue (69a, 69b) destinés à recevoir des attaches filetées (67a, 67b) permettant de fixer les croisillons (22a, 22b) sur les éléments de châssis de siège au niveau de plusieurs emplacements longitudinaux, ou dans lequel l'élément de châssis de siège (127) est fixé sur le croisillon à l'aide de deux boulons (144) et de deux écrous (145), l'élément de châssis de siège (127) étant ajustable par rapport au croisillon (126) en alignant les trous dans le croisillon (126) avec une paire sélectionnée de trous (127a) dans une série de trous dans l'élément de châssis de siège (127).
  9. Fauteuil roulant pliable selon la revendication 1, dans lequel l'élément de châssis de siège (220) comprend une queue-d'aronde (224) qui vient en prise avec un écrou à queue-d'aronde (226) qui est fixé sur le croisillon (222) de manière à ce que l'élément de châssis de siège (220) soit mobile de manière sélective et longitudinale par rapport au croisillon (222).
  10. Fauteuil roulant pliable selon la revendication 1, dans lequel un ensemble formant montage de roue motrice (132) est fixé sur la plaque support de roue (129),
    l'ensemble formant montage de roue motrice (132) comprend un prolongement de support de roue (133) qui est réglable verticalement par rapport à la plaque support de roue (129), et
    une extrémité inférieure de la plaque support de roue (129) est reliée de manière pivotante à l'extrémité inférieure du croisillon pliable (126) au niveau d'un point de pivotement (126a).
  11. Fauteuil roulant pliable (120) selon la revendication 10, dans lequel l'ensemble formant montage de roue motrice comprend un support de manchon d'axe (135) ayant un filet interne, un manchon d'axe (136) a un filet externe qui est en prise filetée avec le filet interne du support de manchon d'axe (135) et a un alésage interne (136b) qui reçoit un axe de roue (141), l'alésage interne étant incliné par rapport à l'axe du filet externe afin de fournir un carrossage à une roue (122), dans lequel le manchon d'axe est conçu pour fournir un ajustement latéral à la roue (122) en faisant tourner le manchon d'axe dans le support de manchon d'axe un nombre quelconque de révolutions complètes, et dans lequel le manchon d'axe est conçu pour fournir un réglage du pincement des roues et de l'ouverture à une roue cambrée en faisant tourner le manchon d'axe (136) dans le support de manchon d'axe (135) une fraction de révolution.
  12. Fauteuil roulant pliable selon la revendication 10, dans lequel la plaque support de roue (129) comprend un élément de plaque support de roue avant (129) et un élément de plaque support de roue arrière (129b), et dans lequel un bloc de raidissement (134) est disposé entre l'élément de plaque support de roue avant (129c) et l'élément de plaque support de roue arrière (129b).
  13. Fauteuil roulant pliable selon la revendication 12, dans lequel une biellette de croisillon (143) est reliée de manière pivotante au niveau d'une première extrémité à un point de pivotement (143a) sur le croisillon (126) et au niveau de l'extrémité opposée sur un point de pivotement (143b) positionné à la mi-hauteur de la plaque support de roue (129).
  14. Fauteuil roulant pliable selon la revendication 1, dans lequel la plaque support de roue (260) comprend une plaque support de roue en un seul bloc.
  15. Fauteuil roulant pliable selon la revendication 14, comprenant un prolongement de plaque support de roue (262) fixé à l'aide de deux boulons (264) passant à travers les côtés de la plaque support de roue (260).
EP05812565A 2004-10-22 2005-10-20 Fauteuil roulant pliable et plaque d'axe associee Active EP1824724B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62148904P 2004-10-22 2004-10-22
PCT/US2005/038052 WO2006047343A2 (fr) 2004-10-22 2005-10-20 Fauteuil roulant pliable et plaque d'axe associee

Publications (3)

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EP1824724A2 EP1824724A2 (fr) 2007-08-29
EP1824724A4 EP1824724A4 (fr) 2008-10-15
EP1824724B1 true EP1824724B1 (fr) 2011-08-17

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CN201064529Y (zh) * 2007-07-30 2008-05-28 佛山市南海建泰铝制品有限公司 一种折叠轮椅
EP2070500A1 (fr) * 2007-12-14 2009-06-17 Invacare International Sàrl Fauteuil roulant pliable avec assemblage du cadre d'entrejambes en forme de X
CA3065604C (fr) 2012-05-07 2021-07-20 Motion Composites Inc. Ensemble support de roue arriere de fauteuil roulant et accoudoir detachable
US10667968B2 (en) * 2016-10-11 2020-06-02 Yosizuka Seiki Co., Ltd. Wheelchair
ES2857722T3 (es) * 2018-02-14 2021-09-29 Batec Mobility S L Sistemas de chasis auxiliar para sillas de ruedas
USD976763S1 (en) 2021-02-10 2023-01-31 Drive Devilbiss Healthcare Rollator
US11559459B2 (en) 2021-02-16 2023-01-24 Drive Devilbiss Healthcare Rollator

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US4989890A (en) * 1986-09-30 1991-02-05 Invacare Corporation Length and width adjustable wheelchair

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CH657985A5 (de) 1982-10-20 1986-10-15 Rainer Kueschall C O Paratec A Faltbarer rollstuhl.
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US5284350A (en) * 1992-05-22 1994-02-08 Medical Composite Technology Foldable wheelchair and side frame assembly
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Also Published As

Publication number Publication date
EP1824724A2 (fr) 2007-08-29
EP1824724A4 (fr) 2008-10-15
WO2006047343A3 (fr) 2007-04-19
WO2006047343A2 (fr) 2006-05-04

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