WO2002015833A1 - Apparatus for propelling a wheelchair - Google Patents

Apparatus for propelling a wheelchair Download PDF

Info

Publication number
WO2002015833A1
WO2002015833A1 PCT/KR2001/001377 KR0101377W WO0215833A1 WO 2002015833 A1 WO2002015833 A1 WO 2002015833A1 KR 0101377 W KR0101377 W KR 0101377W WO 0215833 A1 WO0215833 A1 WO 0215833A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
holding frame
wheelchair
clamp
central axis
Prior art date
Application number
PCT/KR2001/001377
Other languages
French (fr)
Inventor
Dong-Sun Choi
Original Assignee
Choi Dong Sun
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
Priority claimed from KR2020000023572U external-priority patent/KR200232857Y1/en
Priority claimed from KR1020010047398A external-priority patent/KR20020015007A/en
Application filed by Choi Dong Sun filed Critical Choi Dong Sun
Priority to EP01961370A priority Critical patent/EP1261305A1/en
Priority to AU2001282631A priority patent/AU2001282631A1/en
Priority to JP2002520747A priority patent/JP2004506483A/en
Publication of WO2002015833A1 publication Critical patent/WO2002015833A1/en
Priority to US10/121,950 priority patent/US20030030244A1/en

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

Definitions

  • the present ' invention relates to a wheelchair, more in particular, to an apparatus for powering a wheelchair. More specifically, this invention relates to a wheelchair having a hand-operable powering device, allowing the occupant to propel the drive wheel with less torque and even to climb the sloped road easily.
  • Wheelchairs typically consist of a chair frame disposed between two sets of rear and front wheels.
  • the rear wheel which acts as the drive wheel, is engaged directly by the occupant's hands to propel the chair.
  • the disabled occupant sits on the wheelchair and moves wherever he wants to go by propelling the ring that is mounted about the same axis of rotation as the drive wheel.
  • an apparatus for propelling the wheelchair comprises a multiple of pulleys with wires for reducing the level of torque that is manually provided by the disabled person and clamps for rotating the wheel without the backward movement .
  • FIGS. 1 is a schematic bird ' s - eye -view illustrating a preferred embodiment of the apparatus for propelling the wheelchair in accordance with the present invention.
  • FIGS. 2 is a_ schematic side-view illustrating a preferred embodiment of the apparatus for propelling the wheelchair in accordance with the present invention.
  • FIGS. 3 is a schematic plan-view illustrating a preferred embodiment of the apparatus for propelling the wheelchair in accordance with the present invention.
  • FIGS. 4 is a schematic front-view illustrating a preferred embodiment of the apparatus for propelling the wheelchair in accordance with the present invention.
  • FIGS. 5 is a schematic diagram illustrating the magnified side-view of the apparatus for propelling the wheelchair in accordance with the present invention.
  • FIGS. 6 is a schematic diagram illustrating the clamp comprising the apparatus for propelling the wheelchair in accordance with the present invention.
  • FIGS. 1 is a schematic diagram illustrating the propelling apparatus for the wheelchair in accordance with the present invention .
  • the apparatus for propelling the wheelchair comprises a first roller 40 and a holding frame 20 for the central axis wherein one end is aligned with the central axis 14 of the wheel and the other end is assembled with a body handler 13 of the wheelchair.
  • one end of the lever 30 is inserted and assembled with the axis 14 of the wheel in such a way that the lever 30 moves back and forth along the circle with the axis 14.
  • One end of a holding frame 60 for a second roller 70 is also tied to the central axis 14 for the circular movement.
  • the holding frame 60 for a second roller 70 is also tied to a holding frame 90 for a clamp 100.
  • the one side of the holding frame 20 for the central axis now acts as a hinge.
  • the clamp 100 is implemented in a slanted manner such that the clamp touches the handle 12 and experiences the frictional force against the handle 12 when the handle 12 of the wheelchair moves backward.
  • a first wire 50 is installed such that the first wire 50 is fixed to one end of the lever 30 in contact with a first roller 40 and simultaneously ⁇ to ⁇ the . holding . frame _20 for the central axis .
  • a second wire 200 is installed such that the second wire 200 is fixed to one end of the holding frame 90 for the clamp 100 and simultaneously to the backside of the clamp 100.
  • a restoring material 80 can be applied such that the holding frame 60 for a second roller and the holding frame 90 for the clamp recover to the original position after the displacement .
  • the clamp 100 which is fixed by a second wire 200, moves and becomes in contact with the handle 12 of the wheelchair.
  • the holding frame 90 for the clamp 100 moves together with the holing frame 60 for a second roller. Consequently, the clamp 100 exerts a force on the handle and makes the handle 12 rotate .
  • the lever After a pre-defined amount of movement of the holding frame 60 for a second roller and holding frame 90 for clamp, they moves back to their initial position. Simultaneously, the lever is positioned at the original position via a first wire 50 due to a restoring material comprising at one side of the holding frame 90 of the clamp .
  • a spring can be employed as a preferred embodiment of a restoring material in accordance with the present invention.
  • the handle 12 of the wheelchair tends to rotate in a backward direction.
  • the clamp 100 prepared at one side of holding frame 20 of the central axis prevents the wheel from rotating in a backward direction because the clamp 100 is geared to the handle 12 of the wheelchair and is implemented in a slanted fashion with reference to the front direction .
  • the restoring material installed at one end of the holding frame 90 exerts a restoring force on the clamp 100 and thereby prevents the wheel from rotating in a backward direction.

Landscapes

  • 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)
  • Invalid Beds And Related Equipment (AREA)

Abstract

An apparatus for propelling the wheelchair that prevents a backward movement and helps the occupant rotate the wheel with less manual torque. The invention makes it possible for the disabled person to climb the sloped road with less manual force and without fear of dangerous backward slide.

Description

APPARATUS FOR PROPELLING A WHEELCHAIR
FIELD OF THE INVENTION The present ' invention relates to a wheelchair, more in particular, to an apparatus for powering a wheelchair. More specifically, this invention relates to a wheelchair having a hand-operable powering device, allowing the occupant to propel the drive wheel with less torque and even to climb the sloped road easily.
DESCRIPTION OF THE RELATED ART
Wheelchairs typically consist of a chair frame disposed between two sets of rear and front wheels. The rear wheel, which acts as the drive wheel, is engaged directly by the occupant's hands to propel the chair.
The disabled occupant sits on the wheelchair and moves wherever he wants to go by propelling the ring that is mounted about the same axis of rotation as the drive wheel.
For instance, .U. S. Patent Nos . 6,112,837 and 6,095,747 disclose techniques to implement a wheelchair for the disabled person.
In the meanwhile, there is a shortcoming in the traditional wheelchair especially when the disabled occupant tries to climb the sloped road since he needs to supply more torque for propelling the wheel by his arms.
Furthermore, it is even more difficult to cross over a bump with a slope for the disabled occupant since the wheelchair tends to move backward due to the slope of the bump.
SUMMARY OF THE INVENTION
In view of these problems, there is a need in the art for a wheelchair that is not subject to these limitations.
Accordingly, it is an object of the present invention to provide an apparatus for propelling the wheelchair such that the disabled person sitting on the wheelchair easily propels the wheel with less manual torque even when he climbs the sloped road.
It is further an object of the present invention to provide an apparatus for propelling the wheelchair such that the disabled person sitting on the wheelchair avoids the unintentional backward movement of the chair due to the slope of a road or a bump.
In accordance with a broad aspect of the present invention, provided is an apparatus for propelling the wheelchair. The apparatus for propelling the wheelchair comprises a multiple of pulleys with wires for reducing the level of torque that is manually provided by the disabled person and clamps for rotating the wheel without the backward movement .
BRIEF DESCRIPTION OF THE DRAWINGS
Further features of the present invention will become apparent from a description of the wheelchair with the propelling apparatus, taken in conjunction with the accompanying drawings of the preferred embodiment of the invention, which, however, should not be taken to be limitative to the invention, but are for explanation and understanding only.
In the drawings :
FIGS. 1 is a schematic bird ' s - eye -view illustrating a preferred embodiment of the apparatus for propelling the wheelchair in accordance with the present invention.
FIGS. 2 is a_ schematic side-view illustrating a preferred embodiment of the apparatus for propelling the wheelchair in accordance with the present invention.
FIGS. 3 is a schematic plan-view illustrating a preferred embodiment of the apparatus for propelling the wheelchair in accordance with the present invention.
FIGS. 4 is a schematic front-view illustrating a preferred embodiment of the apparatus for propelling the wheelchair in accordance with the present invention.
FIGS. 5 is a schematic diagram illustrating the magnified side-view of the apparatus for propelling the wheelchair in accordance with the present invention.
FIGS. 6 is a schematic diagram illustrating the clamp comprising the apparatus for propelling the wheelchair in accordance with the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
OF THE, INVENTION
The present invention will be explained in detail with reference to the accompanying drawings .
FIGS. 1 is a schematic diagram illustrating the propelling apparatus for the wheelchair in accordance with the present invention .
The apparatus for propelling the wheelchair comprises a first roller 40 and a holding frame 20 for the central axis wherein one end is aligned with the central axis 14 of the wheel and the other end is assembled with a body handler 13 of the wheelchair.
Further, one end of the lever 30 is inserted and assembled with the axis 14 of the wheel in such a way that the lever 30 moves back and forth along the circle with the axis 14.
One end of a holding frame 60 for a second roller 70 is also tied to the central axis 14 for the circular movement.
The holding frame 60 for a second roller 70 is also tied to a holding frame 90 for a clamp 100.
The one side of the holding frame 20 for the central axis now acts as a hinge. The clamp 100 is implemented in a slanted manner such that the clamp touches the handle 12 and experiences the frictional force against the handle 12 when the handle 12 of the wheelchair moves backward.
A first wire 50 is installed such that the first wire 50 is fixed to one end of the lever 30 in contact with a first roller 40 and simultaneously^ to ^the .holding . frame _20 for the central axis .
A second wire 200 is installed such that the second wire 200 is fixed to one end of the holding frame 90 for the clamp 100 and simultaneously to the backside of the clamp 100.
As a preferred embodiment in accordance with the present invention, a restoring material 80 can be applied such that the holding frame 60 for a second roller and the holding frame 90 for the clamp recover to the original position after the displacement .
When the occupant sitting on the chair wants to climb the sloped road, he pushes the lever 30. Then a second roller 70 moves in the same direction with the lever 30 through a first wire 50.
As a consequence of the simultaneous movement of the holding frame 60 of a second roller, the clamp 100, which is fixed by a second wire 200, moves and becomes in contact with the handle 12 of the wheelchair.
In this case, the holding frame 90 for the clamp 100 moves together with the holing frame 60 for a second roller. Consequently, the clamp 100 exerts a force on the handle and makes the handle 12 rotate .
After a pre-defined amount of movement of the holding frame 60 for a second roller and holding frame 90 for clamp, they moves back to their initial position. Simultaneously, the lever is positioned at the original position via a first wire 50 due to a restoring material comprising at one side of the holding frame 90 of the clamp .
As a preferred embodiment of a restoring material in accordance with the present invention, a spring can be employed.
As the clamp 100 installed at the holding frame 90 gets off from the handle 12, the handle 12 of the wheelchair tends to rotate in a backward direction.
The clamp 100 prepared at one side of holding frame 20 of the central axis prevents the wheel from rotating in a backward direction because the clamp 100 is geared to the handle 12 of the wheelchair and is implemented in a slanted fashion with reference to the front direction .
Furthermore, the restoring material installed at one end of the holding frame 90 exerts a restoring force on the clamp 100 and thereby prevents the wheel from rotating in a backward direction.
Thereby, it becomes possible to lower the torque that occupant has to exert on the wheel by implementing a multiple number of rollers and wires comprising a pulley system as a propulsion device for a wheelchair.
It also becomes possible to prevent the wheelchair from dangerously sliding in a backward direction on a sloped road through a clamp exerting a frictional force on the handler due to the restoring force in accordance with the present invention.
Although the invention has been illustrated and described with respect to exemplary embodiments thereof, it should be understood by those skilled in the art that various other changes, omissions and additions may be made therein and thereto, without departing from the spirit and scope of the present invention.
Therefore, the present invention should not be understood as limited to the specific embodiment set forth above but to include all possible embodiments which can be embodies within a scope encompassed and equivalents thereof with respect to the feature set forth in the appended claims .

Claims

WHAT IS CLAIMED IS:
1. An apparatus for propelling a wheelchair , the apparatus comprising: a lever with a predetermined length moving in a circular motion with respect to a central axis as a hinge; a holding frame for a central axis with a first roller at a predefined location, tied at one side of said lever, and tied at the central axis of the wheelchair; a clamp with a saw-tooth shaped rubber exerting a frictional force on the handle of the wheelchair, formed at one of the holding frame of the central axis; a holding frame for a second roller having a second roller at one end, moving with the central axis as a hinge; a holding frame for said clamp exerting a force on said handle of the wheelchair, moving with one end of said holding frame for a second roller as a hinge; a first wire connecting said lever and said first roller, winding said second roller, fixed at one of said holding frame for the central axis, and moving said holding frame for said second roller when the lever is pushed; a second wire tied to one end of said clamp, fixed at one end of said holding frame of said second roller, and moving said clamp when said holding frame for said second roller moves; a holding frame for s'aid second roller; and a restoring material installed at one end of said holding frame for said clamp.
2. The apparatus as set forth in Claim 1, wherein said first roller, said second roller, and said holding frame for said second roller further comprises a multiple of pulleys.
3. The apparatus as set forth in Claim 1, wherein said restoring material comprises a spring and prevents the wheelchair from moving backward through a restoring force exerted on the wheel .
PCT/KR2001/001377 2000-08-19 2001-08-13 Apparatus for propelling a wheelchair WO2002015833A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01961370A EP1261305A1 (en) 2000-08-19 2001-08-13 Apparatus for propelling a wheelchair
AU2001282631A AU2001282631A1 (en) 2000-08-19 2001-08-13 Apparatus for propelling a wheelchair
JP2002520747A JP2004506483A (en) 2000-08-19 2001-08-13 Wheelchair propulsion device
US10/121,950 US20030030244A1 (en) 2001-08-07 2002-04-12 Apparatus for propelling a wheelchair

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR2020000023572U KR200232857Y1 (en) 2000-08-19 2000-08-19 wheel chair pawer system
KR2000/0023572 2000-08-19
KR1020010047398A KR20020015007A (en) 2001-08-07 2001-08-07 Apparatus for propelling a wheel chair
KR2001/0047398 2001-08-07

Publications (1)

Publication Number Publication Date
WO2002015833A1 true WO2002015833A1 (en) 2002-02-28

Family

ID=26637942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2001/001377 WO2002015833A1 (en) 2000-08-19 2001-08-13 Apparatus for propelling a wheelchair

Country Status (5)

Country Link
EP (1) EP1261305A1 (en)
JP (1) JP2004506483A (en)
CN (1) CN1388753A (en)
AU (1) AU2001282631A1 (en)
WO (1) WO2002015833A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890002217Y1 (en) * 1985-12-02 1989-04-15 서정윤 Non skid device for a tyre
JPH05220196A (en) * 1991-10-29 1993-08-31 Tadashi Iura Wheelchair
JPH07171181A (en) * 1993-12-17 1995-07-11 Mitsuo Sato Wheelchair
KR970000421Y1 (en) * 1994-02-02 1997-01-20 우영석 Fire sensor base
US6095747A (en) 1996-12-31 2000-08-01 Lift-U. Division Of Hogan Mfg., Inc. Wheelchair lift with improved outer, inner, and side barriers
US6112837A (en) 1996-09-30 2000-09-05 Yamaha Hatsudoki Kabushiki Kaisha Manually operated, motor assisted wheelchair

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890002217Y1 (en) * 1985-12-02 1989-04-15 서정윤 Non skid device for a tyre
JPH05220196A (en) * 1991-10-29 1993-08-31 Tadashi Iura Wheelchair
JPH07171181A (en) * 1993-12-17 1995-07-11 Mitsuo Sato Wheelchair
KR970000421Y1 (en) * 1994-02-02 1997-01-20 우영석 Fire sensor base
US6112837A (en) 1996-09-30 2000-09-05 Yamaha Hatsudoki Kabushiki Kaisha Manually operated, motor assisted wheelchair
US6095747A (en) 1996-12-31 2000-08-01 Lift-U. Division Of Hogan Mfg., Inc. Wheelchair lift with improved outer, inner, and side barriers

Also Published As

Publication number Publication date
AU2001282631A1 (en) 2002-03-04
EP1261305A1 (en) 2002-12-04
CN1388753A (en) 2003-01-01
JP2004506483A (en) 2004-03-04

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