EP0921780A1 - Wheelchair propulsion kit - Google Patents
Wheelchair propulsion kitInfo
- Publication number
- EP0921780A1 EP0921780A1 EP97933597A EP97933597A EP0921780A1 EP 0921780 A1 EP0921780 A1 EP 0921780A1 EP 97933597 A EP97933597 A EP 97933597A EP 97933597 A EP97933597 A EP 97933597A EP 0921780 A1 EP0921780 A1 EP 0921780A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crank
- hand rail
- lever arm
- wheelchair
- manual propulsion
- 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- Withdrawn
Links
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
- A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
- A61G5/021—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular propulsion mechanisms
- A61G5/022—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular propulsion mechanisms acting on wheels, e.g. on tires or hand rims
-
- 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
- A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
- A61G5/024—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular operating means
- A61G5/025—Levers
-
- 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
- A61G5/1005—Wheelchairs having brakes
- A61G5/1008—Wheelchairs having brakes for gradually slowing down 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
- A61G5/10—Parts, details or accessories
- A61G5/1005—Wheelchairs having brakes
- A61G5/1013—Wheelchairs having brakes engaging the wheel
-
- 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
- A61G5/1005—Wheelchairs having brakes
- A61G5/1035—Wheelchairs having brakes manipulated by wheelchair user
Definitions
- the present invention relates to wheelchairs and more particularly to hand or manual propulsion accessories to enable a wheelchair occupant to more readily propel the wheelchair in forward or rearward directions.
- a construction in accordance with the present invention comprises a manual propulsion kit for a wheelchair wherein the wheelchair includes a frame with two large wheels on either side of the frame and journaled to axles on the frame, each of the large wheels mounting a circular hand rail, the kit including a pair of manual propulsion assemblies wherein each assembly includes a lever arm adapted to be journaled to the axle for rotational movement within a predetermined angular sector determined by a substantially vertical position and a position forward of the frame, a crank handle having a crank web member pivoted for rotation, at the end of the lever arm adjacent the hand rail when the lever arm is mounted to the axle, about an axis coincident with the lever arm such that the crank member defines an arc and moves between a forward position forward of the lever arm, at a tangent to the hand rail, and a reverse position extending rearward of the lever arm and at a
- the friction means is in the form of at least a friction pad mounted to a backing plate that is fixedly mounted to the crank handle grip but underneath the crank web and the backing plate with the crank handle grip are journaled to the crank web so that the at least one friction pad can engage the hand rail whether the crank handle is in the forward or reverse position.
- the friction means includes a bracket that is pivotally mounted to the lever arm adjacent and below the crank handle and the bracket includes a forward component extending forward of the lever arm and a rearward component extending rearwardly thereof and both components extend in a plane tangential to the hand rail, and friction pads are mounted to the bracket components adapted to engage the hand rail when pressure is applied to the crank handle in one of the forward and reverse positions.
- Fig. 1 is a perspective view of a wheelchair incorporating the present invention
- Fig. 2 is a side elevation of the wheelchair shown in Fig. 1;
- Fig. 3 is an enlarged perspective fragmentary view of the present invention ;
- Fig. 4 is an end elevation of the embodiment shown in Fig. 3 in an inoperative position.
- Fig. 5 is a top plan view of the embodiment shown in Fig. 4;
- Fig. 6 is a side elevation of the embodiment shown in Figs. 4 and 5;
- Fig. 7 is a fragmentary cross-section taken along lines 7-7 of Fig. 5;
- Fig. 8 is a fragmentary vertical cross-section taken along lines 8-8 of Fig. 5;
- Fig. 9 is a side elevation showing the present invention in different operable positions;
- Fig. 10 is a perspective view similar to Fig. 3 showing a different embodiment of the present invention.
- Fig. 11 is a side elevation of the embodiment shown in Fig. 10 in an operable position
- Fig. 12 is a fragmentary cross-section taken along lines 12-12 of Fig. 11;
- Fig. 13 is a fragmentary top plan view of the embodiment shown in Figs. 10 through 12 but in an inopera- tive position;
- Fig. 14 is a radial cross-section taken along lines 14-14 of Fig. 13;
- Fig. 15 is a side elevation of the embodiment shown in Figs. 13 and 14. Mode For Carrying Out The Invention
- a wheelchair 10 having a frame 12, and axles 14 extending on the either side of the frame to mount large wheels 18 and 20.
- small caster wheels 22 and 24 are located on the front of the frame 12.
- the large wheels 18 and 20 both mount a circular hand rail 26. Since both sides of the wheelchair are mirror images, only wheel 18 will be described.
- wheel 18 has a peripheral rubber tire 28.
- a manual propulsion assembly 30 is provided.
- the manual propulsion assembly 30 is journaled to the axle 14 as shown in Figs. 3 and 4 and is maintained by thrust bearings 40 and 42.
- a washer 32 is fixed to the axle 14, and may be tack welded to the head 14a of the axle 14.
- An angular segment 34 is cut out in the washer 32 to accommodate a pin 38 mounted to the lever 36.
- the cut out portion 34 will limit the rotational travel of the lever 36.
- a pin 38 on lever arm 36 will travel in cut out portion 34 and will come into contact with the ends of the cut out portion 34 limiting the rotation of lever arm 36.
- the angular sector defined by the cut out portion 34 is preferably 35°.
- the top of the lever arm 36 as shown in Figs. 3 to 6 is provided with a platform 44 at an angle of 90° to the plane of the lever arm 36.
- the platform 44 intersects the plane of the hand rail 26 as shown in Fig. 7.
- a pivot pin 46 is mounted on the lever arm 36 below the platform 44 to mount rocker bracket 48 which is allowed to rotate about the pivot pin 46.
- the rocker bracket 48 includes a pair of wings 50 and 52. As shown in Fig. 6, a spring 54 urges the rocker bracket 48 to a neutral position.
- the wings 50 and 52 are angled and their axial components extend over the hand rail 26 as shown in Fig. 8. Both wings 50 and 52 are provided with rubber pads 58 and 60 respectively.
- the rubber pad 58 includes an axial component 58a and a radial component 58b mounted within the wing 50 of the rocker bracket 48.
- rubber pad 60 includes an axial component 60a and a radial component 60b.
- crank handle 62 having a crank web 70.
- a pivot pin 64 mounts the crank web 70 for rotational movement about the axis X as shown in Fig. 3.
- a handle grip 68 is journaled to the crank web 70.
- a spring mounted detent 66 projects below the handle grip 68 and crank web 70.
- the crank web 70 in this particular embodiment, is a flat strap of spring steel.
- the wings 50, 52 each include a slot 72 or 74 and recesses 76, 78, respectively. For instance, when (Fig.
- the hand grip 68 and web 70 can be rotated about the axis X until the detent 66 engages in the slot 72 and recess 76 on the wing 50. Further downward pressure will bend the crank web 70 and thus rotate the rocker bracket to frictionally press the pad 58a against hand rail 26. Further rearward force by the occupant simultaneously on both propulsion assemblies 30 will cause the hand rails 26 to move and thus entrain the wheels 18 and 20 to rotate rearwardly moving the wheelchair rearwardly. Then the pressure is released and this action is repeated. If it is required to turn the wheelchair the propulsion mechanisms can be operated in an inverse direction, that is with one hand grip being moved forwardly while the other hand grip is rotated and moved rearwardly.
- Figs. 10 through 15 there is shown another embodiment of the present invention. All the elements which are similar to elements in the embodiment of Figs. 1 to 9 have been designated by similar reference numerals but have been raised by 100.
- Fig. 10 shows the manual propulsion assembly 130 including a lever arm 136 journaled to the axle 114.
- a washer 132 having an angular segment 134 cut out therein is provided for limiting the rotation movement of the lever arm 136. This movement is limited by the interaction of rib 138 in the cut out segment 134.
- the washer 132 is fixed to the axle 114, and as shown in Figs. 14 and 15 thrust bearings 140 and 142 maintain the lever arm 136 in a proper radial plane relative to the axle 114.
- the top of the lever arm 136 is provided with a platform 144 which extends at 90° from the lever arm 136, over the hand rail 126.
- the hand rail 126 may be a circular flange extending outwardly of the rim of wheel 118.
- flange 126 will be required in order to cooperate with the manual propulsion assembly as will be described.
- the platform 144 has a short upwardly extending flange 147 which will act as a stopper as will be described.
- a crank web 170 is pivotally mounted by pivot pin 164 to the platform 144 to allow the crank web 170 to rotate about an axis X and to form an arc between two positions, one forward of the lever arm and one rearward thereof, where the web 170 is somewhat tangential to the hand rail 126.
- the flange 147 will limit this arc to 180°.
- the hand grip 168 is mounted to a shaft 169 (as shown in Fig.
- a bracket 145 is fixedly mounted to the shaft 169 below the web 170 such that the bracket 145 will rotate in unison with the handle grip 168 relative to the crank web 170.
- the bracket 145 mounts a friction pad 159, which may be a rubber pad, with an axial component 159a and a radial component 159b.
- a bump 139 is located on the underside of crank web 170 and will engage either recess 141 or 143 in platform 144 when the crank web 170 is in either the forward or rearward position.
- the handle grip 168 In operation, when it is required to advance the wheelchair 10, the handle grip 168 is moved forwardly of the lever arm 136 by rotating the hand grip 168, and thus the crank web 170 about the pivot pin 164 to the point where the hand grip 168 is over the hand rail 126 as shown in Fig. 11.
- the spring steel crank web 170 By pushing forward on the hand grip 168 the spring steel crank web 170 will bend slightly, allowing the friction pad 159a to come into contact and frictionally engage the hand rail 126.
- the hand rail 126 By pushing further on the hand grip 168 towards the dotted lines position shown in Fig. 11, the hand rail 126 will be entrained and thus the wheel 118 and the wheel- chair will move forward.
- An abutment 161 is provided on the bracket 145 to engage the sides of web 170 and limit the rotation of the bracket 145 to 180°.
- the handle grip 168 is rotated away from the hand rail 126 through its reverse arc as shown in Fig. 13 to the position shown in dotted lines where it is over the hand rail 126 but rearward of the lever arm 136. Pressing downwardly or rearwardly on the hand grip 168 will cause the web 170 to give a little, where the friction pad 159 on the bracket 145 will come into contact with the hand rail 126 and further rearward force on the hand grip 168 will entrain the hand rail 126 and therefore the wheel 118 rearwardly, thereby moving the wheelchair in a rearward direction.
- the bracket 145 must be maintained in an aligned position so that it contacts the hand rail 126 properly. However, the width of the bracket 145 will ensure that, when the hand grip 168 is moved towards the hand rail, it will align itself in the same radial plane as the hand rail 126.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2206896P | 1996-07-23 | 1996-07-23 | |
US22068P | 1996-07-23 | ||
PCT/CA1997/000524 WO1998003142A1 (en) | 1996-07-23 | 1997-07-22 | Wheelchair propulsion kit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0921780A1 true EP0921780A1 (en) | 1999-06-16 |
Family
ID=21807667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97933597A Withdrawn EP0921780A1 (en) | 1996-07-23 | 1997-07-22 | Wheelchair propulsion kit |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0921780A1 (en) |
AU (1) | AU3689997A (en) |
CA (1) | CA2261850A1 (en) |
WO (1) | WO1998003142A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6634663B2 (en) * | 1996-07-23 | 2003-10-21 | Raymond L. Mitchell | Wheelchair propulsion kit |
GB0321474D0 (en) | 2003-09-12 | 2003-10-15 | Orford Robert N C | Propulsion aid |
JP2007505003A (en) | 2003-09-12 | 2007-03-08 | ピュア グローバル リミテッド | Propulsion aid |
GB2416153A (en) | 2004-07-16 | 2006-01-18 | Andrew Ramon Brown | A drive system for a human powered vehicle |
US8931796B2 (en) * | 2012-04-20 | 2015-01-13 | Rowheels, Inc. | Propulsion systems for manually operated mobility devices |
EA201691696A1 (en) | 2014-04-25 | 2017-03-31 | Шир Хьюман Дженетик Терапис, Инк. | METHODS OF CLEANING MATRIX RNA |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3189368A (en) | 1963-12-23 | 1965-06-15 | James F Petersen | Wheel chair driver attachment |
US3869146A (en) | 1973-02-08 | 1975-03-04 | Donald L Bulmer | Occupant actuated means for propelling, stopping, directing, and curb hopping a wheelchair |
US3877725A (en) | 1973-03-26 | 1975-04-15 | Herbert Barroza | Wheel driving apparatus |
CA1152423A (en) | 1979-08-31 | 1983-08-23 | Philip J. Lowe | Wheel chair propulsion system |
US5263729A (en) | 1992-02-04 | 1993-11-23 | Watwood Brian M | Wheelchair driver and braking system |
-
1997
- 1997-07-22 WO PCT/CA1997/000524 patent/WO1998003142A1/en not_active Application Discontinuation
- 1997-07-22 AU AU36899/97A patent/AU3689997A/en not_active Abandoned
- 1997-07-22 CA CA002261850A patent/CA2261850A1/en not_active Abandoned
- 1997-07-22 EP EP97933597A patent/EP0921780A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9803142A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2261850A1 (en) | 1998-01-29 |
WO1998003142A1 (en) | 1998-01-29 |
AU3689997A (en) | 1998-02-10 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19990222 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
17Q | First examination report despatched |
Effective date: 19990730 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20010329 |