EP0248093A1 - Foldable wheel chair - Google Patents

Foldable wheel chair Download PDF

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Publication number
EP0248093A1
EP0248093A1 EP86107095A EP86107095A EP0248093A1 EP 0248093 A1 EP0248093 A1 EP 0248093A1 EP 86107095 A EP86107095 A EP 86107095A EP 86107095 A EP86107095 A EP 86107095A EP 0248093 A1 EP0248093 A1 EP 0248093A1
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EP
European Patent Office
Prior art keywords
wheelchair
seat plate
parts
frame side
seat
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.)
Granted
Application number
EP86107095A
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German (de)
French (fr)
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EP0248093B1 (en
Inventor
Michael Heinemann
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.)
Waldemar Heinemann & Co KG GmbH
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Waldemar Heinemann & Co KG GmbH
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Application filed by Waldemar Heinemann & Co KG GmbH filed Critical Waldemar Heinemann & Co KG GmbH
Priority to AT86107095T priority Critical patent/ATE65691T1/en
Priority to DE8686107095T priority patent/DE3680668D1/en
Priority to EP86107095A priority patent/EP0248093B1/en
Publication of EP0248093A1 publication Critical patent/EP0248093A1/en
Application granted granted Critical
Publication of EP0248093B1 publication Critical patent/EP0248093B1/en
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    • 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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • 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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
    • A61G5/0816—Chairs 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
    • 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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0891—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having rigid supports, e.g. seat or back supports which retain their shape after folding of the wheelchair

Definitions

  • the invention relates to a foldable wheelchair with a frame which has two mutually mirror-image frame side parts and a connecting linkage connecting them, a drive wheel and a follower wheel being mounted on each frame side part and the linkage having essentially horizontal joints with which it connects with the frame side parts is connected and with a rigid seat plate.
  • Collapsible wheelchairs should be able to be folded and unfolded as comfortably as possible. Only then is it possible for a disabled user to fold and stow the wheelchair himself after getting into a passenger car and to unfold it again before getting out and to park it next to the passenger car.
  • the weight of the wheelchair should also be as low as possible to enable such handling.
  • a foldable wheelchair is known (DE-PS 34 30 292), in which the seat plate and backrest each consist of two parts connected by a joint.
  • the frame is folded back so to speak, with the frame parts pivoting about joints with vertical axes.
  • This type of folding is for a handicapped person Person again hardly feasible, since the wheelchair does not fold up by simply lifting it up, as is the case with wheelchairs in which the linkage is connected to the frame side parts by joints with horizontal axes.
  • the invention has for its object to form a wheelchair of the type mentioned, that is, a wheelchair with joints with a horizontal axis that folds itself when raised, so that a rigid seat plate can be used with low weight and small dimensions in the folded state.
  • the seat plate consists of two seat plate parts which are connected to one another by a seat hinge, the hinge axis of which lies in the longitudinal center plane of the wheelchair, that the frame side parts are articulated to the seat plate parts by means of upper side joints, that to each Frame side part further at least one telescopic rod is articulated with its lower end by means of lower side joints and the upper ends of the telescopic rods are hinged to the seat joint or in the vicinity thereof and that at least one tension element tensioned in the unfolded state of the wheelchair is provided below the level of the seat plate.
  • the seat plate parts form, so to speak, components of the linkage by which the frame side parts are connected to one another.
  • the wheelchair folds itself up when it is lifted at the seat joint or above the seat joint. Additional manipulations are not necessary. All Parts of the wheelchair remain connected, so that it is not necessary to assemble parts after the wheelchair has been unfolded. Folding and unfolding is just as easy as with a wheelchair with flexible straps as a seat and backrest.
  • the telescopic rods are resilient (claim 2). Such telescopic rods endeavor to bring the wheelchair into the folded state, which makes folding it much easier. Gas springs are particularly suitable as telescopic rods because of their light weight.
  • the telescopic rods are preferably pressed onto the block when the wheelchair is unfolded. As a result, a seat shell half, a telescopic rod and a side part together form a rigid triangle. Two such rigid triangles are articulated to one another via the seat joint. The pulling element prevents these two triangular constructions from unfolding.
  • the tension element is preferably flexible (claim 4). The tension element can be a belt or a wire rope. This also helps to keep the weight of the entire wheelchair low.
  • telescopic rods and tension element Preferably two parallel arrangements of telescopic rods and tension element are provided (claim 5). Overall, this results in a warp-resistant construction. With a corresponding stiffness of the joints and the telescopic rods, it is also possible to get by with an arrangement of telescopic rods and tension element.
  • the seat plate is preferably trough-shaped (claim 6). This provides the user with a particularly good hold. When arranging the side joints in the loading rich in the troughs, the smallest possible width of the folded wheelchair.
  • a rigid backrest is preferably also provided (claim 7), which can also be trough-shaped (claim 8).
  • a rigid two-part backrest gives the user a good hold in the back and also helps to stiffen the wheelchair, since it also acts as a spacer between the frame side parts.
  • a handle is arranged approximately above the center of gravity of the wheelchair in or below the seat plate, which is accessible through a hole in the seat plate. This allows a particularly comfortable grasping of the wheelchair when folding and unfolding.
  • the wheelchair has a frame 1 on which wheels 2 and 3 are mounted. There are also trailing rollers 4, 5 on the frame.
  • the frame also has a seat plate, generally designated 6, and a backrest, generally designated 7.
  • the frame 1 has two frame side parts 8, 9 which are connected to one another via a linkage consisting of two identical arrangements 10, 10 '.
  • the entire construction is symmetrical about a longitudinal central plane 11, so that the side parts 8, 9 are symmetrical about this longitudinal central plane 11.
  • the nature of the frame side parts 8, 9 is described in detail using the example of the frame side part 9.
  • This has a horizontal area 12, at the rear end of which there is a bearing 13 for the impeller 2. From the horizontal area 12, a downwardly sloping area 14 protrudes, which carries a footrest 15 at its lower end.
  • the trailing roller 4 is also attached to the frame side part 9. This is mounted in a fork 16 which can pivot about a vertical axis 17. Due to the lateral displacement of the roller axis of rotation 4a with respect to the vertical axis 17, the wheel 4 continues to run without the same being controlled.
  • the arrangement 10 has two telescopic rods 18, 19 designed as gas springs.
  • the cylinder parts 18a, 19a of the gas springs are articulated on the frame side part 8 or on the frame side part 9 by means of lower side joints 20, 21.
  • the axes of the lower side joints run horizontally.
  • the col support rods 18b are articulated on a seat joint 22.
  • the seat joint 22 also connects the seat plate parts 6a, 6b of the seat plate 6.
  • Each seat plate part 6a, 6b subsequently has a flat part 24 on the seat joint 22 and on the outside thereof an outer region 25 which is concavely curved, so that the seat plate 6 as a whole is trough-shaped.
  • the seat plate part 6a is connected in an articulated manner to the frame side part 8 by means of an upper side joint 26.
  • the joint 26 is arranged in the curved region 25 of the seat plate part 6a and, like the joints 20, 21, 22, has a horizontal joint axis.
  • the seat plate part 6b is articulated to the frame side part 9 by means of a corresponding upper side joint 27.
  • a flexible tension element 28 extends between the lower side joints 20, 21, which e.g. can be designed as a wire rope.
  • the arrangement 10 is located in the rear area of the seat plate 23 and the arrangement 10 'in the front area thereof. There is a hole 29 in the seat plate 6 (see FIG. 2), which is bridged by a handle 30.
  • the handle 20 coincides approximately with the axis of the seat joint 22.
  • Posts 31, 32 rise from frame 1.
  • the upper end of each post is designed as a handle 31a or 32a. The wheelchair can be pushed using these handles.
  • the backrest 7 already mentioned extends between the posts 31, 32. It consists of two parts 7a, 7b which are mirror images of one another and which are articulated to one another at a backrest joint 23. In their outer regions, the backrest parts 7a, 7b are connected to the posts 32, 31, which in turn are rotatable relative to the frame side parts 8, 9.
  • the backrest parts 7a, 7b are in such a position relative to one another that flat parts 34 thereof lie in one plane. At the flat parts 34, curved parts 35 also adjoin here, so that the backrest 7 also forms a depression, which, however, is flatter than on the seat plate 6.
  • the backrest 7 also serves as a spacer between the frame side parts 8, 9 and at the same time forms one Stiffening plate, which prevents the entire frame 1 from twisting in the form of a parallelogram.
  • the handle 30 If the wheelchair is to be folded up, it is gripped by the handle 30. Gripping the handle is easily possible thanks to the hole 29 in the seat plate 6.
  • the handle 30 When the wheelchair is lifted, its parts reach the position shown in dash-dot lines.
  • the flat parts 24 of the seat plate parts 6a, 6b are in an approximately parallel position to one another.
  • the piston rods 18b and 19b of the gas springs are extended. This extension movement is supported by the gas pressure in the springs, which makes it much easier to fold up the wheelchair.
  • the tension elements 28 become slack, which is also shown in FIG. 5.
  • the backrest parts 7a, 7b are folded together, which is also shown in the drawing, is particularly clearly visible in FIGS. 1 and 2.
  • the footrests 15 are also shown according to the arrow 36 on the falling ones Areas 14 of the frame side parts 8, 9 created.
  • the wheelchair has the appearance according to FIG. 4 when viewed from the front. In this state it can be comfortably carried on the handle 30.
  • the wheelchair When the wheelchair is unfolded, it is placed on the floor with a slightly inclined wheel 2 or 3. A downward pressure on the handle 30 causes the wheelchair to spread apart.

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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)
  • Seats For Vehicles (AREA)

Abstract

The wheelchair has a rigid seat (6) which consists of two seat elements (6a, 6b) which are connected to one another in an articulated manner. These elements form functional components of a folding mechanism, which allows frame side parts (8, 9) to be moved up to one another. The side parts (9) are braced relative to the seat (6) by means of telescopic rods (18, 19). By means of the invention, the advantage of a rigid seat (6) is combined with easy handling and low weight of the wheelchair. <IMAGE>

Description

Die Erfindung bezieht sich auf einen faltbaren Rollstuhl mit einem Gestell, das zwei zueinander spiegelbildliche Gestellseitenteile und ein diese verbindendes Verbindungsgestänge aufweist, wobei an jedem Gestellseitenteil ein Antriebsrad und ein Nachlaufrad gelagert ist und das Gestänge im wesentlichen horizontale Gelenke aufweist, mit denen es mit den Gestellseitenteilen verbunden ist und mit einer starren Sitzplatte.The invention relates to a foldable wheelchair with a frame which has two mutually mirror-image frame side parts and a connecting linkage connecting them, a drive wheel and a follower wheel being mounted on each frame side part and the linkage having essentially horizontal joints with which it connects with the frame side parts is connected and with a rigid seat plate.

Zusammenfaltbare Rollstühle sollten sich möglichst bequem zusammenfalten und entfalten lassen. Nur dann ist es einem gehunfähigen Benutzer möglich, den Rollstuhl nach dem Einsteigen in einen Personenkraftwagen selber zusammenzufalten und zu verstauen und vor dem Aussteigen wieder zu entfalten und neben dem Personenkraftwagen abzustellen. Auch sollte das Gewicht des Rollstuhles möglichst gering sein, um eine solche Handhabung zu ermöglichen. Für einen guten Halt des Rollstuhlbenutzers ist auch wesentlich,daß die Sitzfläche starr ist.Collapsible wheelchairs should be able to be folded and unfolded as comfortably as possible. Only then is it possible for a disabled user to fold and stow the wheelchair himself after getting into a passenger car and to unfold it again before getting out and to park it next to the passenger car. The weight of the wheelchair should also be as low as possible to enable such handling. For a good grip for the wheelchair user it is also essential that the seat is rigid.

Der Forderung nach leichter Zusammenlegbarkeit kommen Roll­stühle entgegen, bei denen die Sitzfläche und die Rücken­lehne aus flexiblen Bändern bestehen, also nach Art der Be­spannung eines zusammenlegbaren Campingstuhles ausgebil­det sind. Ein solcher Rollstuhl ist z.B. durch die DE-OS 33 33 570 bekannt. Nachteilig daran ist, daß die Unterstützung des Benutzers an seiner Sitzfläche und an seinem Rücken nicht zufriedenstellend ist.The requirement for easy collapsibility is met by wheelchairs in which the seat and the backrest consist of flexible straps, that is to say are designed in the manner of covering a collapsible camping chair. Such a wheelchair is e.g. known from DE-OS 33 33 570. The disadvantage of this is that the support of the user on his seat and on his back is not satisfactory.

Der Forderung nach einer guten Unterstützung des Benutzers kommen Rollstühle entgegen, die eine starre Sitzplatte auf­weisen. Bei einem bekannten Rollstuhl der eingangs genann­ten Art (DE-OS 31 39 041) ragt die starre Sitzplatte im zu­sammengefalteten Zustand des Rollstuhles senkrecht nach oben, wodurch das Verstauen des Rollstuhles wesentlich er­schwert wird und die Unterbringung in einem Personenkraft­wagen oftmals nicht mehr möglich ist. Bekannt ist auch ei­ne Konstruktion mit starrer abnehmbarer Sitzplatte (DE-OS 30 38 249). Die beiden nach dem Zusammenfalten vorhandenen Teile, nämlich das Gestell mit Rädern und eine Einheit, be­stehend aus Sitzplatte und Rückenlehne, sind zwar für sich alleine nicht zu sperrig für das Verstauen in einem Perso­nenkraftwagen, jedoch ist das Zusammensetzen der Teile für eine gehunfähige Person kaum möglich.Wheelchairs with a rigid seat plate meet the demand for good user support. In a known wheelchair of the type mentioned (DE-OS 31 39 041), the rigid seat plate protrudes vertically upwards in the folded state of the wheelchair, which makes stowing the wheelchair considerably more difficult and it is often no longer possible to accommodate it in a passenger car. Also known is a construction with a rigid removable seat plate (DE-OS 30 38 249). The two parts present after folding, namely the frame with wheels and a unit consisting of a seat plate and backrest, are not too bulky to be stowed in a passenger car by themselves, but assembling the parts is hardly possible for a disabled person .

Schließlich ist auch ein faltbarer Rollstuhl bekannt (DE-­PS 34 30 292), bei dem Sitzplatte und Rückenlehne jeweils aus zwei durch ein Gelenk miteinander verbundenen Teilen bestehen. Das Gestell wird bei diesem Rollstuhl sozusagen nach hinten zusammengefaltet, wobei Schwenkungen der Ge­stellteile um Gelenke mit senkrechten Achsen stattfinden. Diese Art des Zusammenfaltens ist für eine gehbehinderte Person wiederum kaum durchführbar, da der Rollstuhl nicht durch einfaches Hochheben zusammenklappt, wie dies bei Rollstühlen der Fall ist, bei denen das Gestänge durch Ge­lenke mit waagerechten Achsen mit den Gestellseitenteilen ver­bunden ist.Finally, a foldable wheelchair is known (DE-PS 34 30 292), in which the seat plate and backrest each consist of two parts connected by a joint. In this wheelchair, the frame is folded back so to speak, with the frame parts pivoting about joints with vertical axes. This type of folding is for a handicapped person Person again hardly feasible, since the wheelchair does not fold up by simply lifting it up, as is the case with wheelchairs in which the linkage is connected to the frame side parts by joints with horizontal axes.

Der Erfindung liegt die Aufgabe zugrunde, einen Rollstuhl der eingangs genannten Art, also einen Rollstuhl mit Ge­lenken mit waagerechter Achse, der sich beim Anheben sel­ber zusammenfaltet, so auszubilden, daß bei geringem Ge­wicht und geringen Abmessungen im zusammengefalteten Zu­stand eine starre Sitzplatte verwendet werden kann.The invention has for its object to form a wheelchair of the type mentioned, that is, a wheelchair with joints with a horizontal axis that folds itself when raised, so that a rigid seat plate can be used with low weight and small dimensions in the folded state.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß die Sitzplatte aus zwei Sitzplattenteilen besteht, die durch ein Sitzgelenk miteinander verbunden sind, dessen Gelenkachse in der Längsmittelebene des Rollstuhles liegt, daß die Gestellseitenteile mittels oberen Seitengelenken gelenkig mit den Sitzplattenteilen verbunden sind, daß mit jedem Gestellseitenteil ferner mindestens eine Tele­skopstange mit ihrem unteren Ende mittels unteren Seiten­gelenken gelenkig verbunden ist und die oberen Enden der Teleskopstangen am Sitzgelenk oder in der Nähe dessel­ben angelenkt sind und daß unterhalb des Niveaus der Sitz­platte mindestens ein im entfalteten Zustand des Roll­stuhles gespanntes Zugelement vorgesehen ist.This object is achieved according to the invention in that the seat plate consists of two seat plate parts which are connected to one another by a seat hinge, the hinge axis of which lies in the longitudinal center plane of the wheelchair, that the frame side parts are articulated to the seat plate parts by means of upper side joints, that to each Frame side part further at least one telescopic rod is articulated with its lower end by means of lower side joints and the upper ends of the telescopic rods are hinged to the seat joint or in the vicinity thereof and that at least one tension element tensioned in the unfolded state of the wheelchair is provided below the level of the seat plate.

Bei einem so ausgebildeten Rollstuhl bilden die Sitzplat­tenteile sozusagen Bestandteile des Gestänges, durch das die Gestellseitenteile miteinander verbunden sind. Zur Verspannung der Gestellseitenteile gegeneinander sind nur noch die Teleskopstangen und das Zugelement erforderlich, wodurch eine sehr leichte Konstruktion erhalten wird. Der Rollstuhl faltet sich selber zusammen, wenn er am Sitzge­lenk oder oberhalb des Sitzgelenkes angehoben wird. Zu­sätzliche Manipulationen sind nicht erforderlich. Alle Teile des Rollstuhles bleiben zusammenhängend, so daß es nicht erforderlich ist, nach dem Entfalten des Rollstuhles Teile zusammenzubauen. Das Zusammenfalten und Entfalten ist ebenso bequem wie bei einem Rollstuhl mit flexiblen Bändern als Sitzfläche und Rückenlehne.In a wheelchair designed in this way, the seat plate parts form, so to speak, components of the linkage by which the frame side parts are connected to one another. To brace the frame side parts against each other, only the telescopic rods and the tension element are required, resulting in a very light construction. The wheelchair folds itself up when it is lifted at the seat joint or above the seat joint. Additional manipulations are not necessary. All Parts of the wheelchair remain connected, so that it is not necessary to assemble parts after the wheelchair has been unfolded. Folding and unfolding is just as easy as with a wheelchair with flexible straps as a seat and backrest.

Bei einer bevorzugten Ausführungsform sind die Teleskop­stangen federnd ausgebildet (Anspruch 2). Solche Teleskop­stangen haben das Bestreben, den Rollstuhl in den zusam­mengefalteten Zustand zu überführen, wodurch das Zusammen­klappen wesentlich erleichtert wird. Besonders gut geeig­net als Teleskopstangen sind Gasfedern wegen ihres ge­ringen Gewichtes. Die Teleskopstangen sind im entfalteten Zustand des Rollstuhles vorzugsweise auf Block gedrückt. Dadurch bildet eine Sitzschalenhälfte, eine Teleskopstange und ein Seitenteil zusammen ein steifes Dreieck. Zwei solche steifen Dreiecke sind über das Sitzgelenk gelen­kig miteinander verbunden. Das Auseinanderklappen dieser beiden Dreieckskonstruktionen wird durch das Zugelement verhindert. Das Zugelement ist vorzugsweise flexibel (An­spruch 4). Das Zugelement kann ein Gurt oder ein Drahtseil sein. Auch dies trägt dazu bei, das Gewicht des gesamten Rollstuhles niedrig zu halten.In a preferred embodiment, the telescopic rods are resilient (claim 2). Such telescopic rods endeavor to bring the wheelchair into the folded state, which makes folding it much easier. Gas springs are particularly suitable as telescopic rods because of their light weight. The telescopic rods are preferably pressed onto the block when the wheelchair is unfolded. As a result, a seat shell half, a telescopic rod and a side part together form a rigid triangle. Two such rigid triangles are articulated to one another via the seat joint. The pulling element prevents these two triangular constructions from unfolding. The tension element is preferably flexible (claim 4). The tension element can be a belt or a wire rope. This also helps to keep the weight of the entire wheelchair low.

Vorzugsweise sind zwei parallele Anordnungen aus Teleskop­stangen und Zugelement vorgesehen (Anspruch 5). Dies er­gibt insgesamt eine verwindungssteife Konstruktion. Bei entsprechender Steifigkeit der Gelenke und der Teleskop­stangen ist es jedoch auch möglich, mit einer Anordnung aus Teleskopstangen und Zugelement auszukommen.Preferably two parallel arrangements of telescopic rods and tension element are provided (claim 5). Overall, this results in a warp-resistant construction. With a corresponding stiffness of the joints and the telescopic rods, it is also possible to get by with an arrangement of telescopic rods and tension element.

Die Sitzplatte ist vorzugsweise muldenförmig ausgebildet (Anspruch 6). Dadurch wird dem Benutzer ein besonders gu­ter Halt geboten. Bei Anordnung der Seitengelenke im Be­ reich der Mulden erreicht man eine möglichst geringe Brei­te des zusammengefalteten Rollstuhles.The seat plate is preferably trough-shaped (claim 6). This provides the user with a particularly good hold. When arranging the side joints in the loading rich in the troughs, the smallest possible width of the folded wheelchair.

Vorzugsweise ist auch eine starre Rückenlehne vorgesehen (Anspruch 7), die ebenfalls muldenförmig ausgebildet sein kann (Anspruch 8). Eine starre zweiteilige Rückenlehne gibt dem Benutzer einen guten Halt im Rücken und trägt weiterhin zur Versteifung des Rollstuhles bei, da er auch als Abstandshalter zwischen den Gestellseitenteilen wirkt.A rigid backrest is preferably also provided (claim 7), which can also be trough-shaped (claim 8). A rigid two-part backrest gives the user a good hold in the back and also helps to stiffen the wheelchair, since it also acts as a spacer between the frame side parts.

Vorteilhafterweise ist etwa oberhalb des Schwerpunktes des Rollstuhles in oder unterhalb der Sitzplatte ein Griff angeordnet, der durch ein Loch in der Sitzplatte zugäng­lich ist. Dies gestattet ein besonders bequemes Erfas­sen des Rollstuhles beim Zusammenfalten und beim Entfal­ten.Advantageously, a handle is arranged approximately above the center of gravity of the wheelchair in or below the seat plate, which is accessible through a hole in the seat plate. This allows a particularly comfortable grasping of the wheelchair when folding and unfolding.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:

  • Fig. 1 eine Seitenansicht eines Rollstuhles,
  • Fig. 2 eine Draufsicht auf den Rollstuhl in Richtung des Pfeiles II in Fig. 1,
  • Fig. 3 eine Vorderansicht auf den Rollstuhl in Richtung des Pfeiles III in Fig. 1, wo­bei der Rollstuhl entfaltet ist,
  • Fig. 4 eine Vorderansicht im zusammengefalteten Zustand des Rollstuhles und
  • Fig. 5 in einem gegenüber den übrigen Figuren ver­größerten Maßstab eine separate Darstellung des Klappmechanismus.
In the drawing, an embodiment of the invention is shown. Show it:
  • 1 is a side view of a wheelchair,
  • 2 is a plan view of the wheelchair in the direction of arrow II in FIG. 1,
  • 3 shows a front view of the wheelchair in the direction of arrow III in FIG. 1, the wheelchair being unfolded,
  • Fig. 4 is a front view in the folded state of the wheelchair and
  • Fig. 5 on a larger scale compared to the other figures, a separate representation of the folding mechanism.

Der Rollstuhl hat ein Gestell 1, an dem Laufräder 2 und 3 gelagert sind. Ferner befinden sich am Gestell Nach­laufrollen 4, 5. Am Gestell befindet sich ferner eine insgesamt mit 6 bezeichnete Sitzplatte und eine insge­samt mit 7 bezeichnete Rückenlehne.The wheelchair has a frame 1 on which wheels 2 and 3 are mounted. There are also trailing rollers 4, 5 on the frame. The frame also has a seat plate, generally designated 6, and a backrest, generally designated 7.

Das Gestell 1 hat zwei Gestellseitenteile 8, 9, die über ein aus zwei gleichen Anordnungen 10, 10' bestehendes Gestänge miteinander verbunden sind. Die gesamte Kon­struktion ist zu einer Längsmittelebene 11 symmetrisch, so daß die Seitenteile 8, 9 zu dieser Längsmittelebene 11 symmetrisch sind. Die Beschaffenheit der Gestellsei­tenteile 8, 9 im einzelnen wird am Beispiel des Gestell­seitenteiles 9 beschrieben. Dieser hat einen waagerech­ten Bereich 12, an dessen hinterem Ende sich ein Lager 13 für das Laufrad 2 befindet. Vom waagerechten Bereich 12 ragt ein nach unten abfallender Bereich 14 ab, der an seinem un­teren Ende eine Fußstütze 15 trägt. Am Gestellseitenteil 9 ist auch die Nachlaufrolle 4 befestigt. Diese ist in einer Gabel 16 gelagert, die um eine senkrechte Achse 17 schwenken kann. Durch die seitliche Versetzung der Rollendrehachse 4a gegenüber der senkrechten Achse 17 erreicht man ein Nachlaufen des Rades 4 ohne Steuerung desselben.The frame 1 has two frame side parts 8, 9 which are connected to one another via a linkage consisting of two identical arrangements 10, 10 '. The entire construction is symmetrical about a longitudinal central plane 11, so that the side parts 8, 9 are symmetrical about this longitudinal central plane 11. The nature of the frame side parts 8, 9 is described in detail using the example of the frame side part 9. This has a horizontal area 12, at the rear end of which there is a bearing 13 for the impeller 2. From the horizontal area 12, a downwardly sloping area 14 protrudes, which carries a footrest 15 at its lower end. The trailing roller 4 is also attached to the frame side part 9. This is mounted in a fork 16 which can pivot about a vertical axis 17. Due to the lateral displacement of the roller axis of rotation 4a with respect to the vertical axis 17, the wheel 4 continues to run without the same being controlled.

Angenommen sei, daß in Fig. 5 die Anordnung 10 dargestellt ist. Die Anordnung 10 hat zwei als Gasfedern ausgebildete Teleskopstangen 18, 19. Die Zylinderteile 18a, 19a der Gasfedern sind mittels unterer Seitengelenke 20, 21 am Gestellseiten­teil 8 bzw. am Gestellseitenteil 9 angelenkt. Die Achsen der unteren Seitengelenke verlaufen horizontal. Die Kol­ benstangen 18b sind an einem Sitzgelenk 22 angelenkt. Das Sitzgelenk 22 verbindet zugleich Sitzplattenteile 6a, 6b der Sitzplatte 6. Jeder Sitzplatten-teil 6a, 6b hat an­schließend an das Sitzgelenk 22 einen ebenen Teil 24 und außen daran anschließend einen an seiner Oberseite kon­kav gekrümmten äußeren Bereich 25, so daß die Sitzplatte 6 insgesamt muldenförmig ist. Der Sitzplattenteil 6a ist mittels eines oberen Seitengelenkes 26 gelenkig mit dem Gestellseitenteil 8 verbunden. Das Gelenk 26 ist im ge­krümmten Bereich 25 des Sitzplattenteiles 6a angeordnet und hat ebenso wie die Gelenke 20, 21, 22 eine horizon­tale Gelenkachse. Der Sitzplattenteil 6b ist mittels eines entsprechenden oberen Seitengelenkes 27 mit dem Gestellseitenteil 9 gelenkig verbunden.Assume that arrangement 10 is shown in FIG. The arrangement 10 has two telescopic rods 18, 19 designed as gas springs. The cylinder parts 18a, 19a of the gas springs are articulated on the frame side part 8 or on the frame side part 9 by means of lower side joints 20, 21. The axes of the lower side joints run horizontally. The col support rods 18b are articulated on a seat joint 22. The seat joint 22 also connects the seat plate parts 6a, 6b of the seat plate 6. Each seat plate part 6a, 6b subsequently has a flat part 24 on the seat joint 22 and on the outside thereof an outer region 25 which is concavely curved, so that the seat plate 6 as a whole is trough-shaped. The seat plate part 6a is connected in an articulated manner to the frame side part 8 by means of an upper side joint 26. The joint 26 is arranged in the curved region 25 of the seat plate part 6a and, like the joints 20, 21, 22, has a horizontal joint axis. The seat plate part 6b is articulated to the frame side part 9 by means of a corresponding upper side joint 27.

Zwischen den unteren Seitengelenken 20, 21 erstreckt sich ein flexibles Zugelement 28, das z.B. als Drahtseil aus­gebildet sein kann.A flexible tension element 28 extends between the lower side joints 20, 21, which e.g. can be designed as a wire rope.

Parallel zu der beschriebenen Anordnung 10 befindet sich die weitere gleiche Anordnung 10', wie aus der Draufsicht nach Fig. 2 ersichtlich, d.h. weitere Gasfedern und ein weiteres Zugelement. Die Anordnung 10 befindet sich im hinteren Bereich der Sitzplatte 23 und die Anordnung 10' in deren vorderem Bereich. In der Sitzplatte 6 befindet sich (siehe Fig. 2) ein Loch 29, das von einem Griff 30 überbrückt ist. Der Griff 20 fällt etwa mit der Achse des Sitzgelenkes 22 zusammen.Parallel to the described arrangement 10 is the further same arrangement 10 ', as can be seen from the plan view according to FIG. more gas springs and another tension element. The arrangement 10 is located in the rear area of the seat plate 23 and the arrangement 10 'in the front area thereof. There is a hole 29 in the seat plate 6 (see FIG. 2), which is bridged by a handle 30. The handle 20 coincides approximately with the axis of the seat joint 22.

Vom Gestell 1 erheben sich Pfosten 31, 32. Das obere En­de jedes Pfostens ist als Handgriff 31a bzw. 32a ausge­bildet. An diesen Handgriffen kann der Rollstuhl gescho­ben werden.Posts 31, 32 rise from frame 1. The upper end of each post is designed as a handle 31a or 32a. The wheelchair can be pushed using these handles.

Zwischen den Pfosten 31, 32 erstreckt sich die bereits er­wähnte Rückenlehne 7. Diese besteht aus zwei zueinander spiegelbildlichen Teilen 7a, 7b, die an einem Lehnenge­lenk 23 gelenkig miteinander verbunden sind. In ihren äußeren Bereichen sind die Lehnenteile 7a, 7b mit den Pfo­sten 32, 31 verbunden, die ihrerseits relativ zu den Ge­stellseitenteilen 8, 9 drehbar sind.The backrest 7 already mentioned extends between the posts 31, 32. It consists of two parts 7a, 7b which are mirror images of one another and which are articulated to one another at a backrest joint 23. In their outer regions, the backrest parts 7a, 7b are connected to the posts 32, 31, which in turn are rotatable relative to the frame side parts 8, 9.

Im entfalteten Zustand des Rollstuhles nehmen dessen Tei­le diejenige Lage ein, die in der Zeichnung mit ausgezo­genen Linien dargestellt ist. Wie Fig. 5 zeigt, bildet, in Fahrtrichtung des Rollstuhles gesehen, der Sitzplat­tenteil 6a zusammen mit dem Gestellseitenteil 8 und Gas­federn 18 (es sei daran erinnert, daß hintereinander zwei Gasfedern 18 angeordnet sind) eine Dreieckkonstruktion. Hierbei sind die Gasfedern 18 auf Block gedrückt. Eine ent­sprechende Konstruktion bildet der Sitzplattenteil 16a, der Gestellseitenteil 9 und die beiden hintereinanderliegen­den Gasfedern 19. Das Auseinanderklappen dieser Teile um das Sitzgelenk 22 wird durch die Zugelemente 28, von denen ebenfalls hintereinanderliegend zwei vorhanden sind, ver­hindert. In der Benutzungsstellung liegen die ebenen Tei­le 24 der Sitzplattenteile 6a, 6b in einer Ebene.In the unfolded state of the wheelchair, its parts assume the position that is shown in the drawing with solid lines. 5 shows, seen in the direction of travel of the wheelchair, the seat plate part 6a together with the frame side part 8 and gas springs 18 (it should be remembered that two gas springs 18 are arranged one behind the other) forms a triangular construction. Here, the gas springs 18 are pressed onto the block. A corresponding construction is formed by the seat plate part 16a, the frame side part 9 and the two gas springs 19 lying one behind the other. The unfolding of these parts around the seat joint 22 is prevented by the pulling elements 28, two of which are also arranged one behind the other. In the use position, the flat parts 24 of the seat plate parts 6a, 6b lie in one plane.

Die Lehnenteile 7a, 7b sind in einer solchen Lage relativ zueinander, daß ebene Teile 34 derselben in einer Ebene liegen. An die ebenen Teile 34 schließen auch hier gewölb­te Teile 35 an, so daß auch die Rückenlehne 7 eine Mulde bildet, die allerdings flacher ist als an der Sitzplat­te 6. Die Rückenlehne 7 dient ebenfalls als Abstandshal­ter zwischen den Gestellseitenteilen 8, 9 und bildet zu­gleich eine Aussteifungsplatte, die ein parallelogramm­förmiges Verwinden des gesamten Gestells 1 verhindert.The backrest parts 7a, 7b are in such a position relative to one another that flat parts 34 thereof lie in one plane. At the flat parts 34, curved parts 35 also adjoin here, so that the backrest 7 also forms a depression, which, however, is flatter than on the seat plate 6. The backrest 7 also serves as a spacer between the frame side parts 8, 9 and at the same time forms one Stiffening plate, which prevents the entire frame 1 from twisting in the form of a parallelogram.

Wenn der Rollstuhl zusammengefaltet werden soll, wird er am Griff 30 erfaßt. Das Umgreifen des Griffes ist dank des Loches 29 in der Sitzplatte 6 bequem möglich. Beim Anhe­ben des Rollstuhles gelangen dessen Teile in die strich­punktiert eingezeichnete Stellung. Wie am besten aus Fig. 5 ersichtlich ist, befinden sich hierbei die ebenen Teile 24 der Sitzplattenteile 6a, 6b in einer zueinander etwa parallelen Lage. Die Kolbenstangen 18b und 19b der Gasfedern sind ausgefahren. Diese Ausfahrbewegung wird durch den Gasdruck in den Federn unterstützt, wodurch das Zusammenfalten des Rollstuhles wesentlich erleichtert wird. Beim Zusammenfalten werden die Zugelemente 28 schlaff, was in Fig. 5 ebenfalls dargestellt ist. Gleichzeitig mit dem Aneinanderklappen der Sitzplattenteile 6a, 6b werden die Lehnenteile 7a, 7b zusammengefaltet, was in der Zeich­nung ebenfalls dargestellt ist, besonders gut sichtbar in den Fig. 1 und 2. Beim Zusammenklappen werden auch die Fuß­stützen 15 entsprechend dem Pfeil 36 an die abfallenden Be­reiche 14 der Gestellseitenteile 8, 9 angelegt. Nach voll­ständigem Zusammenklappen hat der Rollstuhl von vorne betrach­tet das Aussehen nach Fig. 4. Er kann in diesem Zustand bequem am Griff 30 getragen werden.If the wheelchair is to be folded up, it is gripped by the handle 30. Gripping the handle is easily possible thanks to the hole 29 in the seat plate 6. When the wheelchair is lifted, its parts reach the position shown in dash-dot lines. As can best be seen from FIG. 5, the flat parts 24 of the seat plate parts 6a, 6b are in an approximately parallel position to one another. The piston rods 18b and 19b of the gas springs are extended. This extension movement is supported by the gas pressure in the springs, which makes it much easier to fold up the wheelchair. When folded, the tension elements 28 become slack, which is also shown in FIG. 5. Simultaneously with the folding together of the seat plate parts 6a, 6b, the backrest parts 7a, 7b are folded together, which is also shown in the drawing, is particularly clearly visible in FIGS. 1 and 2. When they are folded up, the footrests 15 are also shown according to the arrow 36 on the falling ones Areas 14 of the frame side parts 8, 9 created. When completely folded, the wheelchair has the appearance according to FIG. 4 when viewed from the front. In this state it can be comfortably carried on the handle 30.

Beim Entfalten des Rollstuhles wird dieser leicht geneigt mit einem Laufrad 2 oder 3 auf den Boden aufgesetzt.Durch einen Abwärtsdruck auf den Griff 30 wird das Auseinander­spreizen des Rollstuhles bewirkt.When the wheelchair is unfolded, it is placed on the floor with a slightly inclined wheel 2 or 3. A downward pressure on the handle 30 causes the wheelchair to spread apart.

Claims (9)

1. Faltbarer Rollstuhl mit einem Gestell, das zwei zu­einander spiegelbildliche Gestellseitenteile und ein die­se verbindendes Verbindungsgestänge aufweist, wobei an jedem Gestellseitenteil ein Antriebsrad und ein Nachlauf­rad gelagert ist und das Gestänge im wesentlichen hori­zontale Gelenke aufweist, mit denen es mit den Gestell­seitenteilen verbunden ist und mit einer starren Sitz­platte, dadurch gekennzeichnet, daß die Sitzplatte (6) aus zwei Sitzplattenteilen (6a, 6b) besteht, die durch ein Sitzgelenk (22) miteinander verbunden sind, dessen Gelenkachse in der Längsmittelebene (11) des Rollstuhles liegt, daß die Gestellseitenteile (8, 9) mittels oberen Seitengelenken (26, 27) gelenkig mit den Sitzplattentei­len (6a, 6b) verbunden sind, daß mit jedem Gestellsei­tenteil (8, 9) ferner mindestens eine Teleskopstange (18, 19) mit ihrem unteren Ende mittels unteren Seiten­gelenken (20, 21) gelenkig verbunden ist und die oberen Enden der Teleskopstangen (18, 19) am Sitzgelenk (22) oder in der Nähe desselben angelenkt sind und daß unter­halb des Niveaus der Sitzplatte (6) mindestens ein im entfalteten Zustand des Rollstuhles gespanntes Zugele­ment (28) vorgesehen ist.1. Foldable wheelchair with a frame which has two mutually mirror-image frame side parts and a connecting rod connecting them, wherein a drive wheel and a follower wheel are mounted on each frame side part and the rod has essentially horizontal joints with which it is connected to the frame side parts and with a rigid seat plate, characterized in that the seat plate (6) consists of two seat plate parts (6a, 6b) which are connected to one another by a seat joint (22), the joint axis of which lies in the longitudinal center plane (11) of the wheelchair, so that the frame side parts ( 8, 9) are connected in an articulated manner to the seat plate parts (6a, 6b) by means of upper side joints (26, 27) so that with each frame side part (8, 9) at least one telescopic rod (18, 19) with its lower end by means of lower side joints ( 20, 21) is articulated and the upper ends of the telescopic rods (18, 19) on the seat joint (22) or nearby the same are articulated and that below the level of the seat plate (6) at least one in unfolded state of the wheelchair tensioned tension element (28) is provided. 2. Rollstuhl nach Anspruch 1, dadurch gekennzeichnet, daß die Teleskopstangen (18, 19) derart als Federn, vor­zugsweise als Gasfedern, ausgebildet sind, daß sie sich zu verlängern versuchen.2. Wheelchair according to claim 1, characterized in that the telescopic rods (18, 19) are designed as springs, preferably as gas springs, that they try to extend. 3. Rollstuhl nach Anspruch 2, dadurch gekennzeichnet, daß die Teleskopstangen (18, 19) im entfalteten Zustand des Rollstuhles auf Block gedrückt sind.3. Wheelchair according to claim 2, characterized in that the telescopic rods (18, 19) are pressed onto the block in the unfolded state of the wheelchair. 4. Rollstuhl nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Zugelement (28) flexi­bel ist, z.B. als Drahtseil ausgebildet ist.4. Wheelchair according to one of the preceding claims, characterized in that the pulling element (28) is flexible, e.g. is designed as a wire rope. 5. Rollstuhl nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Gestänge (10, 10') zwei parallele Anordnungen aus Teleskopstangen (18, 19) und Zugelement (28) aufweist, wobei vorzugsweise eine An­ordnung (10') im vorderen Bereich und die andere Anord­nung (10) im hinteren Bereich der Sitzplatte (6) plaziert ist.5. Wheelchair according to one of the preceding claims, characterized in that the linkage (10, 10 ') has two parallel arrangements of telescopic rods (18, 19) and tension element (28), preferably an arrangement (10') in the front area and the other arrangement (10) is placed in the rear area of the seat plate (6). 6. Rollstuhl nach einem der vorhergehenden Ansprüche,da­durch gekennzeichnet, daß die Sitzplatte (6) muldenförmig ausgebildet ist und die oberen Seitengelenke (26, 27) im Bereich der Muldenseitenwände (25) der Sitzplattenteile (6a, 6b) angeordnet sind.6. Wheelchair according to one of the preceding claims, characterized in that the seat plate (6) is trough-shaped and the upper side joints (26, 27) in the region of the trough side walls (25) of the seat plate parts (6a, 6b) are arranged. 7. Rollstuhl nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine starre Rückenlehne (7) aus zwei Lehnenteilen (7a, 7b), die durch ein Lehnengelenk (23) miteinander verbunden sind, dessen Gelenkachse in der Längsmittelebene (11) des Rollstuhles liegt und die im Bereich ihrer Seitenränder gelenkig mit den Gestell­seitenteilen (8, 9) verbunden sind.7. Wheelchair according to one of the preceding claims, characterized by a rigid backrest (7) consisting of two backrest parts (7a, 7b) which are supported by a backrest joint (23) are connected to one another, the hinge axis of which lies in the longitudinal center plane (11) of the wheelchair and which are articulatedly connected to the frame side parts (8, 9) in the region of their side edges. 8. Rollstuhl nach Anspruch 7, dadurch gekennzeichnet, daß die Rückenlehne (7) muldenförmig ausgebildet ist.8. Wheelchair according to claim 7, characterized in that the backrest (7) is trough-shaped. 9. Rollstuhl nach einem der vorhergehenden Ansprüche, gekennzeichnet durch einen etwa oberhalb des Schwerpunk­tes des Rollstuhles angeordneten Griff (30), der in oder unterhalb der Sitzplatte (6) liegt und durch ein Loch (29) in dieser zugänglich ist.9. Wheelchair according to one of the preceding claims, characterized by a handle (30) arranged approximately above the center of gravity of the wheelchair, which lies in or below the seat plate (6) and is accessible through a hole (29) in the latter.
EP86107095A 1986-05-24 1986-05-24 Foldable wheel chair Expired - Lifetime EP0248093B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT86107095T ATE65691T1 (en) 1986-05-24 1986-05-24 FOLDABLE WHEELCHAIR.
DE8686107095T DE3680668D1 (en) 1986-05-24 1986-05-24 FOLDABLE WHEELCHAIR.
EP86107095A EP0248093B1 (en) 1986-05-24 1986-05-24 Foldable wheel chair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86107095A EP0248093B1 (en) 1986-05-24 1986-05-24 Foldable wheel chair

Publications (2)

Publication Number Publication Date
EP0248093A1 true EP0248093A1 (en) 1987-12-09
EP0248093B1 EP0248093B1 (en) 1991-07-31

Family

ID=8195151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107095A Expired - Lifetime EP0248093B1 (en) 1986-05-24 1986-05-24 Foldable wheel chair

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EP (1) EP0248093B1 (en)
AT (1) ATE65691T1 (en)
DE (1) DE3680668D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8083252B2 (en) * 2008-03-20 2011-12-27 Mary Jo Wagner Cross-frame wheelchair with foldable seat and back
CN107397636A (en) * 2017-07-24 2017-11-28 王东宇 A kind of foldable backrest structure of wheelchair
WO2017202989A1 (en) * 2016-05-26 2017-11-30 Otto Bock Mobility Solutions Gmbh Mobility aid

Citations (8)

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Publication number Priority date Publication date Assignee Title
US2402085A (en) * 1944-08-22 1946-06-11 Gendron Wheel Company Folding wheel chair
US3337261A (en) * 1965-10-23 1967-08-22 Russell E Nihlean Folding wheel chair
FR2252838A1 (en) * 1973-12-03 1975-06-27 Benoit Robert Invalid's carriage with foldable frame - scissor linkage permits side frames to travel inwards to fold flat
DE2903196A1 (en) * 1979-01-27 1980-07-31 Louis L Lepoix Folding mechanism for invalid chair - includes double parallelogram assembly under seat, pulled upwards to moved side frames inwards
DE3145568A1 (en) * 1981-11-17 1983-05-26 Klosner, Helmut, Prof. Dipl.-Ing. Foldable wheelchair
EP0145278A2 (en) * 1983-11-14 1985-06-19 Lieuse Technology Limited Wheelchair
US4553770A (en) * 1983-07-06 1985-11-19 Lyman Roger T Wheelchair attachment
DE3431723C1 (en) * 1984-08-29 1986-02-13 Klaus Dipl.-Ing. 3500 Kassel Seeliger Foldable wheelchair

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2402085A (en) * 1944-08-22 1946-06-11 Gendron Wheel Company Folding wheel chair
US3337261A (en) * 1965-10-23 1967-08-22 Russell E Nihlean Folding wheel chair
FR2252838A1 (en) * 1973-12-03 1975-06-27 Benoit Robert Invalid's carriage with foldable frame - scissor linkage permits side frames to travel inwards to fold flat
DE2903196A1 (en) * 1979-01-27 1980-07-31 Louis L Lepoix Folding mechanism for invalid chair - includes double parallelogram assembly under seat, pulled upwards to moved side frames inwards
DE3145568A1 (en) * 1981-11-17 1983-05-26 Klosner, Helmut, Prof. Dipl.-Ing. Foldable wheelchair
US4553770A (en) * 1983-07-06 1985-11-19 Lyman Roger T Wheelchair attachment
EP0145278A2 (en) * 1983-11-14 1985-06-19 Lieuse Technology Limited Wheelchair
DE3431723C1 (en) * 1984-08-29 1986-02-13 Klaus Dipl.-Ing. 3500 Kassel Seeliger Foldable wheelchair

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8083252B2 (en) * 2008-03-20 2011-12-27 Mary Jo Wagner Cross-frame wheelchair with foldable seat and back
WO2017202989A1 (en) * 2016-05-26 2017-11-30 Otto Bock Mobility Solutions Gmbh Mobility aid
DE102016109757B4 (en) 2016-05-26 2019-03-21 Otto Bock Mobility Solutions Gmbh mobility aid
CN107397636A (en) * 2017-07-24 2017-11-28 王东宇 A kind of foldable backrest structure of wheelchair

Also Published As

Publication number Publication date
DE3680668D1 (en) 1991-09-05
EP0248093B1 (en) 1991-07-31
ATE65691T1 (en) 1991-08-15

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