EP0382873A1 - Zusammenfaltbarer Rollstuhl - Google Patents

Zusammenfaltbarer Rollstuhl Download PDF

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Publication number
EP0382873A1
EP0382873A1 EP19890102753 EP89102753A EP0382873A1 EP 0382873 A1 EP0382873 A1 EP 0382873A1 EP 19890102753 EP19890102753 EP 19890102753 EP 89102753 A EP89102753 A EP 89102753A EP 0382873 A1 EP0382873 A1 EP 0382873A1
Authority
EP
European Patent Office
Prior art keywords
wheelchair
drive system
drive wheel
steering
drive
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.)
Withdrawn
Application number
EP19890102753
Other languages
English (en)
French (fr)
Inventor
Leon Goldenberg
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.)
GERRINGER, NURIT
Original Assignee
Gerringer Nurit
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 Gerringer Nurit filed Critical Gerringer Nurit
Priority to EP19890102753 priority Critical patent/EP0382873A1/de
Publication of EP0382873A1 publication Critical patent/EP0382873A1/de
Withdrawn legal-status Critical Current

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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
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/042—Front wheel drive
    • 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
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/047—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven by a modular detachable drive system
    • 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
    • A61G5/1051—Arrangements for steering

Definitions

  • the present invention relates generally to mobility apparatus for the disabled, and particularly to motor driven collapsible wheelchairs.
  • U.S. Patent No. 2,495,573 discloses a motor attachment for wheel chairs
  • U.S. Patent No. 3,100,547 discloses electric driving apparatus for a wheelchair.
  • An electric drive for wheelchairs is disclosed in U.S. Patent No. 3,930,551, and a detachable electric drive unit for a wheelchair and a mobile chair with a removable rear wheel assembly are disclosed in respective U.S. Patents. Nos. 4,386,672 and 4,643,446.
  • the wheelchair disclosed by Harris et al does not provide steering apparatus over and above the manual mode of ground wheel steering that characterizes conventional manual wheelchairs.
  • the wheelchair includes a mechanical transmission system connected between a handwheel on the side of the wheelchair that corresponds to the hand in use and the ground wheel on the other side. This enables both ground wheels to be driven by turning a single ground wheel.
  • a disadvantage of the single hand driven wheelchair is that the single hand used has to work generally twice as hard when compared with the work done by each of a pair of hands in driving a conventional wheelchair.
  • the drive system although detachable, is configured such that detachment thereof is not required in order to collapse the wheelchair.
  • an independently powered drive system comprising a drive wheel to be rotatably mounted in place of one of the front wheels, apparatus for rotatably mounting the drive wheel onto the wheelchair, motive apparatus mounted in association with the apparatus for rotatably mounting for rotating the drive wheel in a selected direction corresponding to a selected direction of travel of the wheelchair, a power source for the motive apparatus, and drive system control apparatus, the drive system being characterized by compactness thereof, thereby permitting the wheelchair to be collapsed while the drive system is mounted thereon.
  • the drive system also includes clutch apparatus for selectively disengaging the motor from the drive wheel.
  • control apparatus comprises passenger operated velocity control apparatus, and passenger operated apparatus for steering the wheelchair.
  • the drive system control apparatus also comprises selector apparatus for driving the motor in one direction causing forward travel of the drive wheel, and in the opposite direction, causing reverse travel of the drive wheel.
  • the steering apparatus comprises an adjustable length steering column, connected to the drive wheel mounting apparatus, and a hand grip member connected to the steering column, configured for operation by a single hand, the velocity control apparatus being mounted on the hand grip member and being configured so as to be operable by a hand appendage simultaneously with the single hand steering operations.
  • the apparatus for steering comprises electro-­mechanical apparatus.
  • rear mounted apparatus for selectively operating the wheelchair intended for use by a person other than the person seated in the wheelchair, the rear mounted apparatus being adapted to override the passenger operated apparatus for selectively operating the wheelchair.
  • an independently propelled collapsible wheelchair comprising a wheelchair, including apparatus for mounting a pair of front wheels, a single front non-driven wheel rotatably mounted in the apparatus for mounting and an independently powered drive system comprising a drive wheel rotatably mounted in the apparatus for mounting.
  • a collapsible wheelchair referenced generally 10, having a seat 12 attached to a collapsible frame 14 which is mounted on rear wheels 16 and front wheels 18.
  • Wheelchair 10 may be any conventional type, such as is manufactured by Everest and Jennings Inc. of 1803 Pontius Avenue, Los Angeles, California, U.S.A.. Wheelchair 10 also includes conventional detachable foot rests, referenced 29 (Fig. 2), which are omitted from Fig. 1 for purposes of clarity.
  • a conventional wheelchair 10 may be converted into a power driven wheelchair simply by replacing either of front wheels 18 with a drive wheel 22, of a detachable drive system, referenced generally 20, operative in accordance with a preferred embodiment of the present invention.
  • a detachable drive system referenced generally 20, operative in accordance with a preferred embodiment of the present invention.
  • drive system 20 is sufficiently compact such that a wheelchair on which it is mounted may be collapsed without necessitating the prior removal thereof.
  • drive wheel 22 is shown to be rotatably mounted in a modified wheel mounting member 34, attached to a front portion of frame 14.
  • Drive wheel 22 is adapted to be driven about an axis 27, by a geared motor 26.
  • Geared motor 26 may be any conventional type such as is manufactured by Pittman, a division of Penn Engineering & Manufacturing Corporation, of Harleysville, PA, U.S.A.
  • a particular advantage of the wheelchair of the present invention is that, the extra weight of motor 26 acts as a counter moment against tipping of the wheelchair, and therefore obviates the need to install a conventional anti-tip device, as is common practice with wheelchairs intended for use by legless people.
  • Motor 26 is powered typically by a 12 V ni cad battery mounted within a holder 28, typically suspended from a side member 30 of wheelchair frame 14, or by any other conventional 12 V battery as may be used in a car, such as is manufactured by Volcan Batteries Ltd, Tefen Maalot Industrial Area, Israel.
  • Drive wheel 22 is adapted to frictionally engage a surface upon which it is sought to travel and is further adapted to be driven by motor 26 in either forward or reverse directions. It is important to note that when drive wheel 22 is not being driven by motor 26 it is being retarded thereby, thus there is no need for an additional braking system, although this may be provided. It is noted also that, in an alternative embodiment of the invention, motor 26 may be provided with electromagnetic braking apparatus.
  • motor 26 is shown to axially rotate a screw element 31.
  • a toothed wheel 35 is mounted for rotation together with an axle 52 and is arranged so as to be driven by screw element 31 about axis 27.
  • motor 26 may be operated to drive screw element in either of two directions. As shown in Fig. 14, when screw element 31 is rotated in a clockwise direction, toothed wheel 35 and therefore drive wheel 22 are rotated so as to produce forward travel of the wheelchair, as indicated by arrow 37. Accordingly, reverse rotation of the motor would cause reverse travel of the wheelchair.
  • clutch 50 constructed in accordance with an embodiment of the invention.
  • clutch 50 is located centrally with respect to wheel 22, is shown in a disengaged mode of operation.
  • Clutch 50 is adapted to retain wheel 22 in locked registration with axle 52, by means of protrusions 54, that are adapted to simultaneously engage slots, referenced 56 and 58, respectively, of axle 52 and wheel 22.
  • clutch 50 may be disengaged. This disengages wheel 22 from motor 26, such that wheel 22 is not retarded thereby, as described hereinabove.
  • Wheel mounting member 34 includes a socket 32 mounted on a side protrusion 33 of wheel mounting member 34, configured for rotational locking with a male end of a steering column 36.
  • Steering column 36 comprises upper and lower portions, 41 and 43, respectively, adapted to slot into each other.
  • the length of the steering column may be altered by loosening a screw element 60, located thereon, and tightening the screw element once the steering column has been adjusted to a desired length.
  • steering column 36 is situated either to the right or to the left of a person seated in wheelchair 10, in accordance with the location of drive wheel 22.
  • drive system 20 may be specifically configured for installation on a wheelchair in place of either the right or the left wheel thereof.
  • a pair of drive systems 20 may be provided to replace both front wheels of the wheelchair, in order to, for example, provide more drive power thereto.
  • Double hinge 38 Shown generally by reference numeral 38 is a double hinge which not only eases entry into wheelchair 10, and exit therefrom, by moving steering column 36 to the side, but it also enables complete flexibility of movement of a person driving the wheelchair.
  • Double hinge comprises a pair of single hinges, 39, that are connected at right angles and which also connect between upper and lower portions of steering column 36, referenced 41 and 43, respectively.
  • Steering assembly 60 further includes an ON/OFF button 68, a velocity selector 70, and a forward/reverse switch 70.
  • steering assembly 42 is tiltable about an axis 63 in relation to the rest of upper portion 36 of the steering column. This may be achieved by any suitable hinge mechanism and provides greater convenience to a user.
  • button 68 when button 68 is not depressed, no power is supplied to motor 26.
  • power is supplied to motor 26 by one of two alternative circuits, referenced 72 and 74, respectively, as selected by velocity selector 70, as by microswitches.
  • Circuit 72 has a resistance R1 and circuit 74 has a resistance R2. As R1 is greater than R2, the motor input power is less when circuit 72 is selected. and results in a lower wheelchair velocity. When circuit 74 is selected, however, circuit 74 is activated and results in a higher wheelchair velocity.
  • buttons 76 and 80 are similar in design and operation to button 68, except that they are located as to be operable by the thumb of a one handed person, button 78 located so as to be operable by the thumb of a right hand, and button 80 located so as to be operable by the thumb of a left hand.
  • a push button located on a rear handle 84 of wheelchair 10.
  • Button 82 is intended for use by a person controlling wheelchair 10 from behind, and overrides the operations of control panel 66.
  • drive system 20 is equipped with electro-mechanical steering apparatus, as depicted in Fig. 10 and a control circuit of which is shown in Fig. 11.
  • the steering apparatus typically comprises a joy stick, 91, which operates a switching system 90, (Fig. 11), adapted to operate a motor 94 in a direction governed by a given direction of movement of joy stick 91.
  • a relatively small diameter toothed wheel 96 mounted on a motor spindle 95 is a relatively small diameter toothed wheel 96. Wheel 96 is arranged to rotatably engage a relatively large diameter toothed wheel 98 mounted onto drive wheel mounting member 34.
  • a joy stick 100 is used to control an electro-mechanical steering system which is similar to that shown in Fig. 10.
  • buttons 102 may comprise simply an ON/OFF button or may also comprise a plurality of microswitch type elements for governing the speed of a wheelchair on which it is mounted,.

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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)
EP19890102753 1989-02-17 1989-02-17 Zusammenfaltbarer Rollstuhl Withdrawn EP0382873A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19890102753 EP0382873A1 (de) 1989-02-17 1989-02-17 Zusammenfaltbarer Rollstuhl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19890102753 EP0382873A1 (de) 1989-02-17 1989-02-17 Zusammenfaltbarer Rollstuhl

Publications (1)

Publication Number Publication Date
EP0382873A1 true EP0382873A1 (de) 1990-08-22

Family

ID=8200974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890102753 Withdrawn EP0382873A1 (de) 1989-02-17 1989-02-17 Zusammenfaltbarer Rollstuhl

Country Status (1)

Country Link
EP (1) EP0382873A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199520A (en) * 1991-12-11 1993-04-06 Sen Jung Chen Wheeled chair
US5495904A (en) * 1993-09-14 1996-03-05 Fisher & Paykel Limited Wheelchair power system
DE19720813A1 (de) * 1997-05-16 1998-11-19 Christoph Schuster Rollstuhl
GB2326392A (en) * 1997-06-18 1998-12-23 Sunrise Medical Ltd Personal mobility vehicle
US6135222A (en) * 1998-09-11 2000-10-24 Nissin Medical Industries Co., Ltd. Installing structure for an electrically-driven wheelchair
US6702051B2 (en) * 2002-07-12 2004-03-09 Simon Chu Detachable transmission mechanism for a wheel chair
DE102018122366A1 (de) * 2018-09-13 2020-03-19 Alber Gmbh Hilfsantriebsvorrichtung für einen Rollstuhl
WO2021222800A1 (en) * 2020-04-30 2021-11-04 Koyo Bearings North America Llc Motorized caster assembly for manual wheelchair

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495573A (en) * 1948-10-13 1950-01-24 Duke Samuel Motor attachment for wheel chairs
US3023825A (en) * 1958-11-17 1962-03-06 Rabjohn Rodney Robert Power operated wheel chair
US3100547A (en) * 1960-06-30 1963-08-13 Rosenthal Harry Electric driving apparatus for a wheel chair
US3387681A (en) * 1966-02-14 1968-06-11 Rodney R. Rabjohn Power operated wheel chair
FR2151761A5 (de) * 1971-09-08 1973-04-20 Marquet Georges
US3786887A (en) * 1972-03-20 1974-01-22 B Rosenthal Motorized wheel chair drive
FR2232463A1 (de) * 1973-06-09 1975-01-03 Cragg Harold
US4125169A (en) * 1976-06-17 1978-11-14 National Research Development Corporation Wheelchairs
US4140192A (en) * 1977-11-02 1979-02-20 The Spastics Society Wheelchairs
GB1581231A (en) * 1977-04-12 1980-12-10 Biddle Eng Co Ltd Wheelchairs
US4386672A (en) * 1981-06-11 1983-06-07 Coker Theodore R Detachable electric drive unit for wheelchair
GB2134056A (en) * 1982-12-31 1984-08-08 Cecil James Watkins Folding, motorized wheelchair
US4643446A (en) * 1984-10-11 1987-02-17 The Stc Companies, Inc. Mobile chair with removable rear wheel assembly

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495573A (en) * 1948-10-13 1950-01-24 Duke Samuel Motor attachment for wheel chairs
US3023825A (en) * 1958-11-17 1962-03-06 Rabjohn Rodney Robert Power operated wheel chair
US3100547A (en) * 1960-06-30 1963-08-13 Rosenthal Harry Electric driving apparatus for a wheel chair
US3387681A (en) * 1966-02-14 1968-06-11 Rodney R. Rabjohn Power operated wheel chair
FR2151761A5 (de) * 1971-09-08 1973-04-20 Marquet Georges
US3786887A (en) * 1972-03-20 1974-01-22 B Rosenthal Motorized wheel chair drive
FR2232463A1 (de) * 1973-06-09 1975-01-03 Cragg Harold
US4125169A (en) * 1976-06-17 1978-11-14 National Research Development Corporation Wheelchairs
GB1581231A (en) * 1977-04-12 1980-12-10 Biddle Eng Co Ltd Wheelchairs
US4140192A (en) * 1977-11-02 1979-02-20 The Spastics Society Wheelchairs
US4386672A (en) * 1981-06-11 1983-06-07 Coker Theodore R Detachable electric drive unit for wheelchair
GB2134056A (en) * 1982-12-31 1984-08-08 Cecil James Watkins Folding, motorized wheelchair
US4643446A (en) * 1984-10-11 1987-02-17 The Stc Companies, Inc. Mobile chair with removable rear wheel assembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199520A (en) * 1991-12-11 1993-04-06 Sen Jung Chen Wheeled chair
US5495904A (en) * 1993-09-14 1996-03-05 Fisher & Paykel Limited Wheelchair power system
DE19720813A1 (de) * 1997-05-16 1998-11-19 Christoph Schuster Rollstuhl
GB2326392A (en) * 1997-06-18 1998-12-23 Sunrise Medical Ltd Personal mobility vehicle
GB2326392B (en) * 1997-06-18 2001-05-09 Sunrise Medical Ltd Personal mobility vehicle
US6135222A (en) * 1998-09-11 2000-10-24 Nissin Medical Industries Co., Ltd. Installing structure for an electrically-driven wheelchair
US6702051B2 (en) * 2002-07-12 2004-03-09 Simon Chu Detachable transmission mechanism for a wheel chair
DE102018122366A1 (de) * 2018-09-13 2020-03-19 Alber Gmbh Hilfsantriebsvorrichtung für einen Rollstuhl
US11642256B2 (en) 2018-09-13 2023-05-09 Alber Gmbh Auxiliary drive device for a wheelchair
WO2021222800A1 (en) * 2020-04-30 2021-11-04 Koyo Bearings North America Llc Motorized caster assembly for manual wheelchair

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