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EP3831353B1 - Rückenlehnenanordnung und rollstuhl damit - Google Patents

Rückenlehnenanordnung und rollstuhl damit Download PDF

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Publication number
EP3831353B1
EP3831353B1 EP19213638.0A EP19213638A EP3831353B1 EP 3831353 B1 EP3831353 B1 EP 3831353B1 EP 19213638 A EP19213638 A EP 19213638A EP 3831353 B1 EP3831353 B1 EP 3831353B1
Authority
EP
European Patent Office
Prior art keywords
handle
backrest
cable
cable guide
backrest assembly
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.)
Active
Application number
EP19213638.0A
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English (en)
French (fr)
Other versions
EP3831353A1 (de
Inventor
Michael Knopf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sunrise Medical GmbH and Co KG
Original Assignee
Sunrise Medical GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sunrise Medical GmbH and Co KG filed Critical Sunrise Medical GmbH and Co KG
Priority to EP19213638.0A priority Critical patent/EP3831353B1/de
Publication of EP3831353A1 publication Critical patent/EP3831353A1/de
Application granted granted Critical
Publication of EP3831353B1 publication Critical patent/EP3831353B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion

Definitions

  • the present invention relates to a chair seat backrest assembly according to the preamble of claim 1 as described in EP 3 578 151 A1 , not being pre-published, and a wheelchair with such a backrest assembly.
  • a chair typically comprises a frame that supports a seat having a seating surface and a backrest, and a plurality of legs.
  • a wheelchair is a type of chair for allowing the locomotion of a person while this person uses the chair.
  • the legs of the chair are typically configured as wheels, with a standard type comprising four wheels, wherein two wheels are typically configured as drive wheels.
  • a chair, in particular a wheelchair often incorporates folding functions that allow the overall size of the chair frame to be reduced in order to store or transport the unoccupied chair.
  • US 7,100,988 B1 refers to a child's highchair for receiving a child in a seated orientation.
  • Said chair includes a supporting frame, a seat supported by the frame, and a back connected to the frame wherein the back is movable between a substantially vertical orientation and a rearwardly tilted or reclining orientation.
  • a release mechanism is integrated into the highchair and includes a release handle, a pair of cable arrangements and securing pins that are movable between a locked position and a released position by manipulation of the release mechanism. With the securing pins in a locked position, the back is fixed in position in a substantially vertical orientation. With the securing pins retracted, the back is able to be moved manually to a reclining position so as to enlarge the included angle between the back and the seat, making it easier to place a child in the highchair.
  • FR 2 845 893 A1 refers to a wheelchair comprising a chassis resting on wheels and a backrest pivotally mounted on the chassis, with the backrest comprising two lateral tubular elements, two handles each provided at an upper end part of said lateral tubular elements, two supports, with the lower end part of each of said lateral tubular elements being pivotally mounted on an axis bearing on the supports, and two locking means provided for immobilizing the lower end portions of said lateral tubular elements relative to the respective supports in several positions.
  • the usage of two handles for two control members for moving the two locking means requires the usage of two hands for changing the position of the backrest which renders the wheelchair manipulation complicated.
  • EP 1 319 381 A2 describes a mobile chair for invalid transport comprising a chassis on which a seat, a backrest and armrests as seat portions are mounted movably relative to each other.
  • a displacement device with which at least one of the seat portions is displaceable, can be fixed in a respectively desired position by means of a latching device; and a handle, which is fixed to the backrest, is provided with an actuating device, the movement of which can be transmitted to the displacement device by way of a cable transmission.
  • the actuating device has a rotary portion which is arranged rotatably about the longitudinal axis of the handle and a rotary movement of which can be transmitted to the displacement device by way of Bowden cable wherein a pulling cable of the Bowden cable is fixedly connected to the rotary portion.
  • the drawback is that a rotation of the rotary portion in one direction of rotation leads to a movement of a latching device into an unlocked, released position, and a rotation in the opposite direction is required to move the latching device back into the locking or latched position. Thus, two rotations are necessary in opposite directions.
  • Pre-known backrest assemblies have the difficulty that some users cannot carry out an unlocking and folding of the backrest, even in case of a single-handed operation making usage of a pull cable.
  • tension on the pull cables has to be maintained in order to avoid play.
  • At least an actuator in particular comprising a battery, a motor, an electric actuator, preferably an electric motor, a hydraulic actuator, preferably a hydraulic motor, a pneumatic actuator, preferably a pneumatic motor, a thermal actuator, a shape memory alloy, preferably a thermal and/or magnetic shape memory alloy, a mechanical actuator and/or a valve for actuating and/or controlling the movement of the backrest and/or the additional device.
  • the accessibility of the handle for unlocking depends on the installation height and can be adapted to the individual needs.
  • the handle has a hand friendly contour by being non-circular in cross-section, in particular being oval in cross-section.
  • This oval character can be achieved e.g. by adding a label to the handle with the additional benefit that the label can be used to transport messages like an advertising message or a personalizes message selected by the user of the chair.
  • the hand-friendly oval contour of the handle results in sufficient installation space inside the handle for guiding and attaching the cables and additional means like stop members and the like.
  • the connection from the handle to an unlocking part is achieved by the cables, which are preferably in form of steel cables and can be deflected inside the handle by 90° via cable guides. For determining the direction of rotation and avoiding a backlash screws acting as clamping nipples and stop members are used.
  • inventions provide at least two second joints which allow the movement of the backrest tubes between the second end position and a third end position along a second direction, wherein preferably the first and second direction are substantially different.
  • Each first and/or second joint can be configured to be adjustable, in particular to adjust the first, second and/or third end position(s), with each joint preferably comprising a plurality of connecting means, preferably in form of holes for at least one transverse screw, and/or stop means.
  • Each locking means can comprise a wedge and/or can provide an, in particular inclined, guiding plane, with preferably at last one transverse screw being guided along the guiding plane during locking and/or unlocking of the locking means.
  • a trigger and a locking device can be provided, in particular comprising the elastic means, for locking and/or unlocking the handle.
  • the trigger can be designed as or can comprise at least one of a hull, a lever, a knob, a button, a latch, a strap, a clamp, a key, a switch and/or a sensor, preferably a force sensor, a tactile sensor, an optical sensor, a sound sensor and/or a fingerprint sensor, and/or is engineered to be effected by at least partly sliding, rotating, squeezing, pushing, pulling and/or touching.
  • the handle can comprise a sensor, preferably a force sensor, a tactile sensor, an optical sensor, a sound sensor and/or a fingerprint sensor.
  • the handle backrest tube(s) and/or the handle can comprise an indicator device in addition to the label or in form of the label, for conveying information to the user, wherein preferably the indicator device comprises a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
  • the indicator device comprises a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
  • the invention also provides a wheelchair comprising a backrest assembly according to the invention.
  • FIG. 1 provides an exploded view of a backrest assembly 1 of an embodiment of the invention, with figure 2 providing another exploded view to better show a twist lock 1.1 of the backrest assembly 1.
  • Said twist lock 1.1 comprises a connecting rod 1.2 connected at opposite ends with backrest tubes 1.13 as well as cable guides each having a cable guide top 1.6 and a cable guide bottom 1.7.
  • the connecting rod 1.2 has attachment holes 1.21 to be aligned with attachment holes 1.22 of the backrest tubes 1.13 and respective holes extending through the cable guides such that one screw 1.8 can be passed through all three elements, along a screw connection path 1.81 shown in figure 4b , at each end of the connecting rod 1.2.
  • the cable guides guide pull cables 1.3, with one pull cable 1.2 coming from the left backrest tube 1.13 and the other pull cable 1.3 from the right backrest tube 1.13, and each pull cable 1.3 being held under tension with the help of a cable clamp 1.4 via a set screw 1.5.
  • the cable clamps 4 are mounted within the twist lock 1.1 between a center handle top 1.9 and a center handle bottom 1.10, at fixed locations, see figure 3 .
  • the connecting rod 1.2 attached between the two cable guides 1.6, 1.7, which guide the two pull cables 1.3 to the two cable clamps 1.4, is housed between the center handle top 1.9 and the center handle bottom 1.10, which are attached to each other via cap screws 1.12.
  • a label 1.11 can be attached to the two handle halves 1.9, 1.10 for conveying information for example by carrying an advertisement print, a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
  • the backrest assembly 1 comprises said two transverse backrest tubes 1.13 connected to the twist lock 1.1 and each one of the two transverse backrest tubes 1.13 guides one pull cable 1.3 from the twist lock 1.1 into a backrest tube 1.14.
  • the backrest tubes 1.14 are substantially perpendicular to the backrest tubes 1.13 and can be tilted relative to seat frame tubes 1.15, for example from a substantially vertical first position as shown in figure 1 into an inclined second position, via joints comprising a back bracket 4.1 on each side the backrest assembly 1. For enabling such a tilting, or rather a folding and un-folding of the backrest assembly 1 relative to the seat frame tubes 1.15, each pull cable 1.3.
  • a locking means comprising a back latch 2.3, with a spring 2.2 and a spring stop 2.1 being arranged between the back latch 2.3 and a transverse screw 5.3 carrying rivets 6.2 and secured via a nut 6.3 to the respective backrest tube 1.14.
  • the transverse screw 5.3, 6.1 not only serves as abutment member for the spring stop 2.1, but also for attachment of the respective back bracket 4.1 such that the backrest tube 1.14 extends into the respective back bracket 4.1 between the two rivets 6.2 and the back latch 2.3 can telescope out of the backrest tube 1.14.
  • Each back bracket 4.1 is not only attached to one backrest tube 1.14 but also to one seat frame tube 1.15 via cap screws 4.4 with caps 4.2, 4.3.
  • a further back lock plate 5.1 is not only attached to one backrest tube 1.14 but also to one seat frame tube 1.15 via cap screws 4.4 with caps 4.2, 4.3.
  • Each back latch 2.3 has an inclined surface due to is wedge shape at its free end which is locked by the transversely extending respective screw 4.5, 5.2 in an idle position of the twist lock 1.1 and can be unlocked by rotating the twist lock 1.1 forwards, i.e. into the plane of figure 1 and towards the backrest tubes 1.14 as well as the seat frame tubes 1.15, to slide along the respective screw 4.5, 5.2 against the force of the respective spring 2.2 being compressed against the spring stop 2.1.
  • each pull cable 1.3 is mounted under tension via the respective cable clamp 1.4.
  • each pull cable 1.3 passes its respective cable guide or rather is forced to run within a recess 1.71 provided by the cable guide bottom 1.7 and along a projection 1.6.1 provided by the cable guide top 1.6, see figures 4a to 4c .
  • rotating the twist lock 1.1 results in rotating the connecting rod 1.2 together with the two cable guides 1.6, 1.7 such that the pull cables 1.3 are redirected or rather deflected inside the handle 1.9, 1.10.
  • Figure 5a shows the twist lock 1.1 in its idle position with the stop screw 1.8 securing the two cable guide halves 1.6, 1.7 together within the backrest tube 1.13 and resting against a projection 1.101 provided on the inner wall of the handle bottom 1.10.
  • the stop screw 1.8 disengages from the projection 1.101 as shown in figure 5b , and as soon as said grip is released, the stop screw 1.8 will automatically be rotated back against the projection 1.101 defining the idle position.
  • twist lock 1.1 will always be in its idle position when the backrest assembly 1 is locked, either in the first or the second position, and can only be rotated in one direction for disengaging the stop screw 1.8 and the projection 1.101 as well as unlocking the back brackets 4.1 for allowing a change of position, either from the first position into the second position or vice versa.
  • the handle 1.9, 1.10 providing a grip of the twist lock 1.1, has a hand friendly contour by being non-circular in cross-section, in particular being oval in cross-section.
  • This oval character can be seen in figures 5a and 5b , with both the handle bottom 1.10 and the handle top 1.9 having an u-shaped, flattened cross-section. This shape is made even more ergonomically by the label 1.11 against which the palm of the hand can be applied for gripping the handle 1.9, 1.10.
  • twist lock handle of the invention is described with respect to unlocking and folding/un-folding a backrest assembly in particular of a wheelchair, but can also be used for moving other parts relative to each other.

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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)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (13)

  1. Rückenlehnenanordnung (1) für einen Stuhlsitz, insbesondere für einen Rollstuhl, umfassend:
    eine Rückenlehne zum Stützen des Rückens einer Person;
    zwei hohle Rückenlehnenrohre (1.14), die dazu ausgelegt sind, die Rückenlehne an jeder Seite eines Sitzes mit dem Sitz zu verbinden;
    mindestens zwei Gelenke (4.1), um eine Bewegung der Rückenlehnenrohre (1.14) zwischen mindestens einer ersten Endposition und einer zweiten Endposition in Bezug auf den Sitz zu ermöglichen;
    zwei Verriegelungsmittel (2.3) zum Verriegeln und/oder Entriegeln der Gelenke (4.1);
    gekennzeichnet durch
    mindestens ein hohles Griffstückrohr (1.13), das ein Griffstück (1.9, 1.10) trägt, das in der Mitte zwischen den Rückenlehnenrohren (1.14) angeordnet ist und mit den Verriegelungsmitteln (2.3) mechanisch über Kabel (1.3) verbunden ist, die im Wesentlichen im Inneren der hohlen Rohre (1.14, 1.13) verlaufen, wobei die Kabel (1.3) Torsionskabel sind, die von den zwei hohlen Rückenlehnenrohren (1.14) über zwei Griffstückrohre (1.13) in das Griffstück (1.9, 1.10) geleitet werden und über eine Verbindungsstange (1.2) miteinander verbunden sind,
    wobei
    das Griffstück (1.9, 1.10)
    • eine Drehverriegelung (1.1) bereitstellt, wobei die Drehverriegelung (1.1) nur eine Ruheposition aufweist, in der das Verriegelungsmittel (2.3) verriegelt ist, und dazu ausgelegt ist, das Verriegelungsmittel (2.3) bei Drehung des Griffstücks (1.9, 1.10) zu entriegeln, und
    • dazu geeignet ist, die Rückenlehnenrohre (1.14) über die Gelenke (4.1) durch Schieben oder Ziehen nach dem Entriegeln zu bewegen,
    das Griffstück (1.9, 1.10) dazu ausgelegt ist, von einem Benutzer nur in eine Richtung zum Entriegeln des Verriegelungsmittels (2.3) in eine beliebige der Endpositionen zu drehen, und
    das Griffstück (1.9, 1.10) dazu ausgelegt ist, sich nach dem Entriegeln des Verriegelungsmittels (2.3) und Lösen des Griffs automatisch erneut zu verriegeln, sodass das Drehen und Schieben oder Ziehen des Griffstücks (1.9, 1.10) durch Greifen des Griffstücks (1.9, 1.10) mit einer Hand eines Benutzers, ohne den jeweiligen Griff des Griffstücks (10; 100) zu lösen, erzielt werden kann,
    weiter umfassend
    eine Kabelführung (1.6, 1.7) für jedes der zwei Kabel (1.3), wobei die Kabelführungen (1.6, 1.7) innerhalb des Griffstücks (1.9, 1.10) angeordnet sind und die Verbindungsstange (1.2) zwischen den zwei Kabelführungen befestigen, und wobei jedes Kabel (1.3) mit einem Verriegelungsmittel (2.3) über ein elastisches Element verbunden ist, das dazu geeignet ist, innerhalb eines vorab bestimmten Bereichs zusammengedrückt oder ausgefahren zu werden,
    wobei jede Kabelführung (1.6, 1.7) eine Kabelablenkungsneigung bereitstellt und jedes Kabel (1.3) innerhalb des Griffstücks (1.9, 1.10) über seine jeweilige Kabelführung (1.6, 1.7) bei Drehung des Griffstück (1.9, 1.10) entgegen der Federkraft des jeweiligen elastischen Elements zum Entriegeln des Verriegelungsmittels (2.3) umgeleitet oder abgelenkt wird und bei Lösung des Griffstücks (1.9, 1.10) aufgrund der Lösung der Federkraft automatisch in seinen Ruhezustand zurückgeführt wird, sodass das Griffstück (1.9, 1.10) automatisch in seine Ruheposition zurückkehrt.
  2. Rückenlehnenanordnung nach Anspruch 1, dadurch gekennzeichnet, dass
    jedes Kabel (1.3) unter Spannung über eine Kabelklemme (1.4) durch Festziehen mindestens einer Stellschraube (1.5) angebracht wird.
  3. Rückenlehnenanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass
    bei Drehung des Griffstücks (1.9, 1.10) um bis zu 30 ° jedes Kabel (1.3) im Inneren des Griffstücks (1.9, 1.10) über seine jeweilige Kabelführung (1.6, 1.7) um bis zu 90 ° umgeleitet oder abgelenkt wird.
  4. Rückenlehnenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass
    jede Kabelführung eine Kabelführungsoberseite (1.6) und eine Kabelführungsunterseite (1.7) umfasst und jede Kabelablenkungsneigung durch eine Kabelführungsaussparung (1.71), die durch die Kabelführungsunterseite (1.7) bereitgestellt ist, und einen Kabelführungsvorsprung (1.61), der durch die Kabelführungsoberseite bereitgestellt ist (1.6), bereitgestellt ist.
  5. Rückenlehnenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass
    das Griffstück eine Griffstückoberseite (1.9) und eine Griffstückunterseite (1.10) umfasst und einen nicht kreisförmigen Querschnitt in Form eines abgeflachten oder ovalen Querschnitts aufweist.
  6. Rückenlehnenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass
    das Griffstück ein Schild (1.11) zum Anzeigen einer Mitteilung umfasst.
  7. Rückenlehnenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass
    das Griffstück mindestens ein Anschlagelement (1.101) umfasst, das die Ruheposition des Griffstücks definiert.
  8. Rückenlehnenanordnung nach einem der vorangehenden Ansprüche, gekennzeichnet durch erste Verbindungsmittel in Form von ersten Schrauben (1.8), die die Verbindungsstange (1.2) und die Kabelführungen (1.6, 1.7) mit den hohlen Griffstückrohren (1.13) verbinden,
    • wobei mindestens eine erste Schraube (1.8) ein Ende der Verbindungsstange (1.2) an einer Kabelführung (1.6, 1.7) sowie an einem hohlen Griffstückrohr (1.13) befestigt und mindestens eine andere erste Schraube (1.8) das andere, gegenüberliegende Ende der Verbindungsstange (1.2) an der anderen Kabelführung (1.6, 1.7) sowie dem anderen hohlen Griffstückrohr (1.13) befestigt und
    • wobei mindestens eine erste Schraube (1.8) in ein hohles Griffstückrohr (1.13) eintritt und durch die Kabelführungsunterseite (1.7), die Verbindungsstange (1.2) und die Kabelführungsoberseite (1.6) verläuft, um aus dem hohlen Griffstückrohr (1.13) auszutreten.
  9. Rückenlehnenanordnung nach Anspruch 8, dadurch gekennzeichnet, dass
    jede erste Schraube (1.8) ein Anschlagelement bereitstellt, das mit einem Anschlagelement (1.101) des Griffstücks (1.9, 1.10) zusammenwirkt, um die Ruheposition des Griffstücks (1.9, 1.10) zu sichern.
  10. Rückenlehnenanordnung nach Anspruch 8 oder 9, gekennzeichnet durch
    zweite Verbindungsmittel in Form von mindestens einer zweiten Schraube (1.12), die die Griffstückunterseite (1.10) mit der Griffstückoberseite (1.9) verbindet,
    • wobei zwei zweite Schrauben (1.12) in der Mitte des Griffstücks (1.9, 1.10) oder an beiden Seiten der Verbindungsstange (1.2) oder in einem Bereich mit verringertem Durchmesser der Verbindungsstange (1.2) angeordnet sind.
  11. Rückenlehnenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass
    das Griffstück (1.9, 1.10) ausgehend von seiner Ruheposition nur um bis zu 30 ° gedreht werden kann
    und/oder
    das Griffstück (1.9, 1.10) ausgehend von seiner Ruheposition nur vorwärts gedreht werden kann.
  12. Rückenlehnenanordnung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Griffstück (1.9, 1.10) dazu ausgelegt ist, eine zusätzliche Vorrichtung in Form einer Sitzoberfläche des Stuhls, eines Sitzrahmens des Stuhls, mindestens eines Beins, mindestens einer Lehne oder mindestens eines Rads des Stuhls zu bewegen.
  13. Rollstuhl, umfassend eine Rückenlehnenanordnung nach einem der vorangehenden Ansprüche.
EP19213638.0A 2019-12-04 2019-12-04 Rückenlehnenanordnung und rollstuhl damit Active EP3831353B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19213638.0A EP3831353B1 (de) 2019-12-04 2019-12-04 Rückenlehnenanordnung und rollstuhl damit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19213638.0A EP3831353B1 (de) 2019-12-04 2019-12-04 Rückenlehnenanordnung und rollstuhl damit

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Publication Number Publication Date
EP3831353A1 EP3831353A1 (de) 2021-06-09
EP3831353B1 true EP3831353B1 (de) 2022-04-27

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2845893B1 (fr) * 2002-10-21 2005-02-04 Invacare Poirier Sa Fauteuil roulant comportant un dossier inclinable

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10161624C1 (de) * 2001-12-14 2002-11-28 Herbert Brustmann Fahrbarer Stuhl für den Krankentransport
US7100988B1 (en) 2004-06-03 2006-09-05 Hyslop William J Child's highchair with a reclining back
DE102018113346A1 (de) * 2018-06-05 2019-12-05 Sunrise Medical Gmbh Rückenlehne und Stuhl, insbesondere für einen Rollstuhl

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2845893B1 (fr) * 2002-10-21 2005-02-04 Invacare Poirier Sa Fauteuil roulant comportant un dossier inclinable

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