WO1992015271A1 - A device for wheel-chairs - Google Patents

A device for wheel-chairs Download PDF

Info

Publication number
WO1992015271A1
WO1992015271A1 PCT/NO1992/000035 NO9200035W WO9215271A1 WO 1992015271 A1 WO1992015271 A1 WO 1992015271A1 NO 9200035 W NO9200035 W NO 9200035W WO 9215271 A1 WO9215271 A1 WO 9215271A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
seat
section
turning
arm
Prior art date
Application number
PCT/NO1992/000035
Other languages
French (fr)
Inventor
Jan Braseth
Original Assignee
Hand-Pro As
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 Hand-Pro As filed Critical Hand-Pro As
Publication of WO1992015271A1 publication Critical patent/WO1992015271A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1059—Arrangements for adjusting the seat adjusting the height of the seat

Definitions

  • the invention relates to a device for wheel-chairs with a frame, driving wheels and a seat which can be raised and lowered.
  • the object of the invention is to provide a device of the type described in the introduction which is not or is only slightly encumbered by the above-mentioned disadvantages.
  • the wheel-chair comprises a frame 1 with, e.g., four driving wheels 2.
  • the frame comprises two side beams 3 which are U-shaped in cross section and extend in the wheel-chair's longitudinal direction, and which are arranged in such a way that the cross section openings face upwards.
  • These side beams can be interconnected by means of transverse beams.
  • Each side beam has an upward projecting profile 4 at its rear section.
  • the axes of rotation 12, 13, 14, 15 are running parallel to one another and in a plane which is parallel to the seat's sitting plane, and the distance between each individual arm's axis of rotation is the same for all the arms 10, 11.
  • the seat's sitting plane i.e. the upper plane of the seat which is normally principally horizontal when the wheel-chair is standing on a horizontal base, will undergo parallel displacement in the vertical direction when the wheel-chair is standing in this way.
  • a rod 20 has one of its end sections rotatably connected to a central section of one arm 11 and its other end section rotatably connected to a roller 21 which is arranged to roll on the web of one of the side beams 3.
  • an actuator 22 e.g. preferably an electrical screw jack with a housing 24 and an actuator rod 23 which can be moved in its longitudinal direction in and out of the housing 24, the roller 21 being rotatably connected with the end section of the actuator rod 23 facing away from the housing and the housing 24 is connected with the frame 1 close to the profile 4, e.g. by means of a transverse screw 25.
  • the roller 21 and the lower end section of the rod 20 will also be shifted to the left along the side beam 3.
  • the rod 20 will thereby push the arm 11 in an anticlockwise direction and cause the seat to be raised.
  • the seat 5 By operating the actuator so that the actuator rod 23 is shifted to the right of the drawing, the seat 5 will be lowered. Even if the side beam's cross section is open at the top, the weight of the seat 5 and person sitting on it will thereby be sufficient to cause the roller 21 to be forced to abut against the side beam 3. In order to prevent the roller 21 from being raised from the side beam 3 under any circumstances, this can have an additional upper, longitudinal flange against which the roller 21 can abut when the seat is lowered in this way.
  • the actuator can be a hydraulic cylinder. Unless the chair has other devices which have to be operated, this will probably be a more expensive arrangement, since in addition a pressure fluid source, control valves, etc. have to be provided.
  • a turning motor can be provided which exercises a torque between the frame and an arm at the turning point for the connection between the frame and the seat and this arm, thus avoiding the need for the rod 20 and the wheel 21.
  • the rod 20 can, of course, be connected to the upper rod 10, and the actuator 24 can be connected to the seat 5 instead of to the frame 1.
  • the profile and the connecting line can extend at another angle to this plane. If the connecting line is parallel to the seat's sitting plane, both the profile 4 and the downward projecting section of the seat can be dispensed with, since the lower end sections of the arms 10 and 11 of the arm pairs according to the drawing can be rotatably connected to, e.g., the vertical flange of the side beams 3.
  • the side beams can be arranged so that the openings of the U-shaped cross section face upwards, they can be arranged so that the cross section openings face one another, the rollers 21 in this case being arranged so as to abut against the profile's flanges.
  • the screw 25 whereby the actuator is attached extends through the web of the side beam.

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)
  • Seats For Vehicles (AREA)

Abstract

A device for wheel-chairs with a frame (1), driving wheels (2) and a seat which can be raised and lowered. According to the invention the device comprises at least one pair of parallel arms whereby the seat (5) can undergo parallel displacement in the height direction in relation to the frame (1) by means of a device (20, 21, 22) for turning of the arms (10, 11) in relation to the frame (1).

Description

A device for wheel-chairs
The invention relates to a device for wheel-chairs with a frame, driving wheels and a seat which can be raised and lowered.
There are previously known wheel-chairs where the seat can be raised and lowered in relation to the frame by means of a jack with a telescopically extendable arm, inflatable bellows, crossed or articulated arms, or a device similar to that used in fork-lift trucks, and comprises a principally vertical track along which the seat can be moved. The disadvantage with all of these, however, is that they do not allow the seat to be lowered to as low a position as required and/or that they do not permit sufficient adjustment of the seat, in addition to the fact that they are expensive.
The object of the invention is to provide a device of the type described in the introduction which is not or is only slightly encumbered by the above-mentioned disadvantages.
The characteristic features of the device are evident from the claims presented.
In the following section the invention will be described in more detail with reference to the drawing, whose only figure is a schematic side view of an embodiment of a wheel-chair, where sections of this have been removed.
As can be seen in the figure, the wheel-chair comprises a frame 1 with, e.g., four driving wheels 2. The frame comprises two side beams 3 which are U-shaped in cross section and extend in the wheel-chair's longitudinal direction, and which are arranged in such a way that the cross section openings face upwards. These side beams can be interconnected by means of transverse beams. Each side beam has an upward projecting profile 4 at its rear section. On each side of the wheel-chair there extends from the profile 4 to a seat 5 a pair of parallel arms 10, 11, the end sections of which are rotatably connected to the profile 4 and a downward projecting section 6 of the seat.
The axes of rotation 12, 13, 14, 15 are running parallel to one another and in a plane which is parallel to the seat's sitting plane, and the distance between each individual arm's axis of rotation is the same for all the arms 10, 11. Thus when the arms are rotated around the turning point at the connection with the profile 4, the seat's sitting plane, i.e. the upper plane of the seat which is normally principally horizontal when the wheel-chair is standing on a horizontal base, will undergo parallel displacement in the vertical direction when the wheel-chair is standing in this way.
A rod 20 has one of its end sections rotatably connected to a central section of one arm 11 and its other end section rotatably connected to a roller 21 which is arranged to roll on the web of one of the side beams 3. In the side beam there is also provided an actuator 22, e.g. preferably an electrical screw jack with a housing 24 and an actuator rod 23 which can be moved in its longitudinal direction in and out of the housing 24, the roller 21 being rotatably connected with the end section of the actuator rod 23 facing away from the housing and the housing 24 is connected with the frame 1 close to the profile 4, e.g. by means of a transverse screw 25.
By operating the actuator 22 so that the actuator rod 23 is shifted to the left of the figure, the roller 21 and the lower end section of the rod 20 will also be shifted to the left along the side beam 3. The rod 20 will thereby push the arm 11 in an anticlockwise direction and cause the seat to be raised.
By operating the actuator so that the actuator rod 23 is shifted to the right of the drawing, the seat 5 will be lowered. Even if the side beam's cross section is open at the top, the weight of the seat 5 and person sitting on it will thereby be sufficient to cause the roller 21 to be forced to abut against the side beam 3. In order to prevent the roller 21 from being raised from the side beam 3 under any circumstances, this can have an additional upper, longitudinal flange against which the roller 21 can abut when the seat is lowered in this way.
In a second embodiment the actuator can be a hydraulic cylinder. Unless the chair has other devices which have to be operated, this will probably be a more expensive arrangement, since in addition a pressure fluid source, control valves, etc. have to be provided.
Instead of having a linear actuator, a turning motor can be provided which exercises a torque between the frame and an arm at the turning point for the connection between the frame and the seat and this arm, thus avoiding the need for the rod 20 and the wheel 21.
Instead of having the rod 20 connected to the lower arm 11, it can, of course, be connected to the upper rod 10, and the actuator 24 can be connected to the seat 5 instead of to the frame 1. Even though it is advantageous for the profile 4 and the connecting line between the axes of rotation 12 and 13 to extend perpendicular to the seat's sitting plane, the profile and the connecting line can extend at another angle to this plane. If the connecting line is parallel to the seat's sitting plane, both the profile 4 and the downward projecting section of the seat can be dispensed with, since the lower end sections of the arms 10 and 11 of the arm pairs according to the drawing can be rotatably connected to, e.g., the vertical flange of the side beams 3.
Instead of having the side beams arranged in such a way that the openings of the U-shaped cross section face upwards, they can be arranged so that the cross section openings face one another, the rollers 21 in this case being arranged so as to abut against the profile's flanges. In this case the screw 25 whereby the actuator is attached extends through the web of the side beam.

Claims

PATENT CLAIMS
1. A device for wheel-chairs with a frame (1) which is provided with driving wheels (2) , a seat (5) and at least one pair of parallel arms (10, 11) which are each rotatably connected with the seat (5) and the frame (1) respectively, and a turning device (20, 22, 23, 24) which is arranged so as to exercise a force against at least one of the arms for turning of these in relation to the frame and thereby cause principally translatory movement of the seat in the height direction, the turning device comprising an actuator (22) , whose stationary part (24) is connected to the frame (1) and whose movable part (23) is arranged to be moved linearly and horizontally at the lower section of the frame, characterized in that a section of at least one of the arms (10, 11) , which section is located at a distance from the turning point for the connection with the frame (1) , is rotatably connected with one end section of a rod (20) , whose other end section is rotatably connected with the movable part (23) , the movement of the movable part thus causing turning of the arms (10, 11) .
2. A device for wheel-chairs according to claim 1, characterized in that the section of the arm (11) against which the actuator (22) is arranged to exercise a force, is situated on that side of the turning point (13) for the arm's (11) connection with the frame (1) which faces away from the point (15) for the arm's turning point connection with the seat.
3. A device for wheel-chairs according to claim 1, characterized in that the section of the arm (11) against which the actuator (22) is arranged to exercise a force, is situated between the turning points (13, 15) for the arm's (11) connection with the frame (1) and the seat (15) .
PCT/NO1992/000035 1991-03-01 1992-02-26 A device for wheel-chairs WO1992015271A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO91910840A NO910840L (en) 1991-03-01 1991-03-01 WHEELCHAIR DEVICE.
NO910840 1991-03-01

Publications (1)

Publication Number Publication Date
WO1992015271A1 true WO1992015271A1 (en) 1992-09-17

Family

ID=19893915

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1992/000035 WO1992015271A1 (en) 1991-03-01 1992-02-26 A device for wheel-chairs

Country Status (3)

Country Link
AU (1) AU1543292A (en)
NO (1) NO910840L (en)
WO (1) WO1992015271A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275029A (en) * 1993-02-12 1994-08-17 Stephen John Rose Wheelchairs
EP1273282A3 (en) * 2001-06-30 2003-10-29 Invacare (Deutschland) GmbH Adjusting device
NL1022812C2 (en) * 2003-02-28 2004-08-31 Lopital Nederland B V Shower-toilet chair for handicapped person has mobile support frame and secondary frame adjustable in height by parallel bars on opposite sides of chair, bars being rotatable by electric drive system
WO2006111183A1 (en) * 2005-04-21 2006-10-26 Ab Skf Wheelchair
DE102005005829B4 (en) * 2005-02-08 2009-01-22 Paravan Gmbh Wheelchair with a height-adjustable seat support
US8128120B2 (en) 2006-04-03 2012-03-06 Lifestand “Vivre Debout” Multi-position wheelchair for handicapped people
GB2515037A (en) * 2013-06-11 2014-12-17 Colin Jones Pushchair for a child
WO2016020860A1 (en) * 2014-08-05 2016-02-11 M.C. Futura Innovazioni Srl Multifunctional apparatus for passive physical rehabilitation
WO2019161868A1 (en) * 2018-02-26 2019-08-29 Global FabTech (Shanghai) Company Limited Seating furniture chassis and method of operation
EP4268780A1 (en) 2022-04-25 2023-11-01 4 Power 4 - Powerstand Wheelchair for disabled person with seat with multiple positions controlled by a single cylinder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083055A (en) * 1961-03-23 1963-03-26 Charles S Davis Patient chair
DE2716821A1 (en) * 1976-04-16 1977-11-03 Edward J Gaffney LIFTER
FR2399822A1 (en) * 1977-08-09 1979-03-09 Dupont Lit Sa Folding wheel chair for handicapped people - consists of frame on two drive wheels, with seat mounted by parallel arms raised and lowered by jack
US4173372A (en) * 1977-10-11 1979-11-06 Gary Reynolds Dental chair

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083055A (en) * 1961-03-23 1963-03-26 Charles S Davis Patient chair
DE2716821A1 (en) * 1976-04-16 1977-11-03 Edward J Gaffney LIFTER
FR2399822A1 (en) * 1977-08-09 1979-03-09 Dupont Lit Sa Folding wheel chair for handicapped people - consists of frame on two drive wheels, with seat mounted by parallel arms raised and lowered by jack
US4173372A (en) * 1977-10-11 1979-11-06 Gary Reynolds Dental chair

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275029A (en) * 1993-02-12 1994-08-17 Stephen John Rose Wheelchairs
GB2275029B (en) * 1993-02-12 1996-06-05 Stephen John Rose Improvements in and relating to wheelchairs
EP1273282A3 (en) * 2001-06-30 2003-10-29 Invacare (Deutschland) GmbH Adjusting device
NL1022812C2 (en) * 2003-02-28 2004-08-31 Lopital Nederland B V Shower-toilet chair for handicapped person has mobile support frame and secondary frame adjustable in height by parallel bars on opposite sides of chair, bars being rotatable by electric drive system
DE102005005829B4 (en) * 2005-02-08 2009-01-22 Paravan Gmbh Wheelchair with a height-adjustable seat support
WO2006111183A1 (en) * 2005-04-21 2006-10-26 Ab Skf Wheelchair
US8128120B2 (en) 2006-04-03 2012-03-06 Lifestand “Vivre Debout” Multi-position wheelchair for handicapped people
GB2515037A (en) * 2013-06-11 2014-12-17 Colin Jones Pushchair for a child
WO2016020860A1 (en) * 2014-08-05 2016-02-11 M.C. Futura Innovazioni Srl Multifunctional apparatus for passive physical rehabilitation
US10470961B2 (en) 2014-08-05 2019-11-12 M.C. Futura Innovazioni Srl Multifunctional apparatus for passive physical rehabilitation
WO2019161868A1 (en) * 2018-02-26 2019-08-29 Global FabTech (Shanghai) Company Limited Seating furniture chassis and method of operation
EP4268780A1 (en) 2022-04-25 2023-11-01 4 Power 4 - Powerstand Wheelchair for disabled person with seat with multiple positions controlled by a single cylinder

Also Published As

Publication number Publication date
NO910840L (en) 1992-09-02
NO910840D0 (en) 1991-03-01
AU1543292A (en) 1992-10-06

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