US3573877A - Curb-climbing attachment for wheel chairs - Google Patents
Curb-climbing attachment for wheel chairs Download PDFInfo
- Publication number
- US3573877A US3573877A US825913A US3573877DA US3573877A US 3573877 A US3573877 A US 3573877A US 825913 A US825913 A US 825913A US 3573877D A US3573877D A US 3573877DA US 3573877 A US3573877 A US 3573877A
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- Prior art keywords
- chair
- side frame
- curb
- lever
- attached
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- Expired - Lifetime
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- 230000002459 sustained effect Effects 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 241001503987 Clematis vitalba Species 0.000 description 1
- 241001128140 Reseda Species 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
- A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps
- A61G5/068—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps with extensible supports pushing upwards, e.g. telescopic legs
-
- 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
- A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps
-
- 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
- A61G5/1089—Anti-tip devices
Definitions
- ABSTRACT Curb-Climbing Structure added to wheel chairs Int. Cl B62b 5/02 with lifting means to be actuated by the occupant of the chair Field of Search 280/5.2, to raise the rear of the chair to a curb level after the front por- 5.28, 5.3, 5.32, (Stair Climber), (Chairs (Digest)) tion of the chair is placed on the curb.
- the main object of this invention is to provide mechanism that is attached to, or can be attached to, or can be made an integral part of conventional manually operated wheelchairs to provide means that can be manipulated by the occupant of the chair to climb upon. curbs or other elevated surfaces or descend therefrom, as the case may warrant.
- Another object is to provide simple inexpensive structure that can be quickly manipulated and will not interfere with the normal utility of the chair, such as the operation thereof; the folding and storing thereof; and otherwise the normal handling of the chair.
- FIG. 1 is a side elevation of a conventional wheel chair with my improvements attached thereto;
- H6. 2 is a rear elevation of the same
- FIG. 3 is a side elevation of the same with the chair in the first position to accomplish climbing a curb, the front portion being on the curb;
- FIG. 4 is a side elevation of the chair after the rear portion has been raised up to the level of the curb.
- My improvement to wheelchairs comprises in general a clamp attached to the rear vertical bar 11 of each side frame of a conventional wheelchair to each of which a rela tively thin lever 12 which can be flexed sidewise is pivotally mounted at 13.
- a plunger 14 is pivotally attached to the rear end 15 of each lever 12 and each plunger 14 extends through a guide 16 that is integral to a clamp 17 attached to the rear end of the bottom horizontal bar 18 of each respective side frame of the chair.
- a relatively small wheel 19 is rotatively mounted at the rear of each clamp 17 for the purpose of checking the backward tipping of the chair, and thus insuring safety to the occupant, which is required to place the front portion of the chair upon a curb, as shown in FlG. 3.
- Each lever 12 extends to the front of the chair and normally rests on the normal locking plate 20 of the brake lever 21 normally provided on each side frame of the chair.
- the plungers 14 are such that when the levers 12 are in this normal position and the chair is tipped backward onto the rear wheels 19, as shown in FIG. 3, the lower end 22 of the plungers will just clear the level 23.
- the front portion of the chair is first placed upon the curb by the occupant throwing his body backward and pushing forward on the drive wheels simultaneously and this action also moves'the chair forward until the drive wheels contact the face of the curb as show in FIG. 3, as well as to tip the chair backward onto the rear wheels 19.
- the occupant then pulls upward on each lever simultaneously and flexes them outwardly to pass by and be hooked on stud, or the like, 24 provided in the normal upper horizontal bar 25 of each side frame, respectively, of the chair.
- the chair To descend from a curb, the chair is first backed near the edge of the curb and the levers 12 are raised and hooked on the studs 24 which lowers the plungers 14 to contact the level below. The chair is then backed substantially to the position shown in FIG. 4. The levers 12 are then lowered in control of the occupant which-lowers the rear of the chair y to the position shown in H6. 3. The chair is then backed until the front portion drops from the curb to the level below. A plurality of studs 25 could be provided in bar 25, as shown, to accommodate van'ousheights of curbs.
- the plungers 14 are forcibly inclined toward the front of the chair by the manipulation of the levers 12. This action forces the drive wheels against the face of the curb during the raising of the rear of the chair and is most essential to insure proper operating.
- This inclination of the plungers 14 is effected by the fulcrum of the levers 12 being positioned above and forward of the center of the drive wheels of the chair.
- an attachment to accomplish a curb-climbing and descending function comprising a clamp attached to each side frame of the chair and near the back thereof and a lever pivotally attached to each clamp, to swing fore and aft relative to the chair the forward end of each lever, including a handle disposed for manipulation by the occupant of the chair means attached to each side frame of the chair for use in holding said levers at various operational positions, an upwardly extending plunger pivotally attached to the other end of each lever and disposed to contact the lever surface when the levers are manipulated to raise or lower the rear portion of the chair, which ever the case may warrant, when the front portion of the chair is upon a curb or other elevated surface, an apertured guide means for slidably engaging each said plunger attached to the lower horizontal bar of each side frame of the chair, and a wheel rotatively mounted at the rear of each guide and disposed to check the backward tipping of the chair as required to place the front portion of the chair upon a curb or other elevated, surface.
- An occupant propelled and controlled curb-climbing wheelchair comprising a pair of rigid side frames sustained in spaced relationship by lateral structure, said structure forming a chair comprising a seat, a back and a footrest, a drive wheel rotatively mounted on each side frame at the rear of the chair and a swivel wheel rotatively mounted to each side frame at the front or footrest end of the chair, a manually operated brake for each drive wheel attached to each side frame, curbclimbing means integral with each side frame comprising a lever pivotally mounted to each side frame near the back of the chair to swing fore and aft relative to the chair, the forward end of each lever including a handle disposed for manipulation by the occupant of the chair, means on each side frame for use in holding said levers at various operational positions an upwardly extending plunger pivotally attached to the other end of each lever and disposed to contact the level surface when the levers are manipulated to raise or lower the rear of the chair, which ever the case may warrant, when the front portion of the chair is
Abstract
Curb-Climbing Structure added to wheel chairs with lifting means to be actuated by the occupant of the chair to raise the rear of the chair to a curb level after the front portion of the chair is placed on the curb.
Description
United States Patent Inventor Burton H. Locke [56] References Cited 6545 Wilbur Ave, Spc. 84, Reseda, Calif. UNITED STATES PATENTS A l N 32 1,259,064 3/1918 Wolff 280/5.28 1 865,514 9/1907 Mullenmeister 280/5.32X F1led May 19, I969 Patented Apr 6 1971 1,739,260 12/1929 Roe 280/5.2 1 2,701,005 2/1955 Bennett et al 280/5.3
Primary Examiner-Leo Friaglia CURB-CLIMBING ATTACHMENT FOR WHEEL CHAIRS 2 Claims, 4 Drawing Figs.
US. Cl 280/5.32,
280/5.2 ABSTRACT: Curb-Climbing Structure added to wheel chairs Int. Cl B62b 5/02 with lifting means to be actuated by the occupant of the chair Field of Search 280/5.2, to raise the rear of the chair to a curb level after the front por- 5.28, 5.3, 5.32, (Stair Climber), (Chairs (Digest)) tion of the chair is placed on the curb.
CURB-CLIMBING ATTACHMENT FOR WHEEL CHAIRS This invention relates to improvements to conventional selfpropelled wheelchairs for the use of handicapped persons. The main object of this invention is to provide mechanism that is attached to, or can be attached to, or can be made an integral part of conventional manually operated wheelchairs to provide means that can be manipulated by the occupant of the chair to climb upon. curbs or other elevated surfaces or descend therefrom, as the case may warrant.
Another object is to provide simple inexpensive structure that can be quickly manipulated and will not interfere with the normal utility of the chair, such as the operation thereof; the folding and storing thereof; and otherwise the normal handling of the chair. 1n the accompanying drawing:
FIG. 1, is a side elevation of a conventional wheel chair with my improvements attached thereto;
H6. 2, is a rear elevation of the same;
FIG. 3, is a side elevation of the same with the chair in the first position to accomplish climbing a curb, the front portion being on the curb; and
FIG. 4, is a side elevation of the chair after the rear portion has been raised up to the level of the curb.
The drawing show a conventional wheelchair with my improvements attach'thereto. Therefore, for reason of simplicity it is thought unnecessary to describe the wheelchair structure since a wheelchair structure is widely known throughout the world.
My improvement to wheelchairs comprises in general a clamp attached to the rear vertical bar 11 of each side frame of a conventional wheelchair to each of which a rela tively thin lever 12 which can be flexed sidewise is pivotally mounted at 13. A plunger 14 is pivotally attached to the rear end 15 of each lever 12 and each plunger 14 extends through a guide 16 that is integral to a clamp 17 attached to the rear end of the bottom horizontal bar 18 of each respective side frame of the chair. A relatively small wheel 19 is rotatively mounted at the rear of each clamp 17 for the purpose of checking the backward tipping of the chair, and thus insuring safety to the occupant, which is required to place the front portion of the chair upon a curb, as shown in FlG. 3.
Each lever 12 extends to the front of the chair and normally rests on the normal locking plate 20 of the brake lever 21 normally provided on each side frame of the chair. The plungers 14 are such that when the levers 12 are in this normal position and the chair is tipped backward onto the rear wheels 19, as shown in FIG. 3, the lower end 22 of the plungers will just clear the level 23.
To climb a curb, the front portion of the chair is first placed upon the curb by the occupant throwing his body backward and pushing forward on the drive wheels simultaneously and this action also moves'the chair forward until the drive wheels contact the face of the curb as show in FIG. 3, as well as to tip the chair backward onto the rear wheels 19. The occupant then pulls upward on each lever simultaneously and flexes them outwardly to pass by and be hooked on stud, or the like, 24 provided in the normal upper horizontal bar 25 of each side frame, respectively, of the chair.
This movement of the levers 12 forces each respective plunger 14 downward against the lever surface 23 and thereby raises the rear of the chair upward substantially to the top 26 of the curb, as shown in FIG. 4. This chair is then driven forward until the drive wheels are well on top of the curb. The levers 12 are thenlowered to their normal position on top of the brake-holding plates 20, as shown in FIG. 1.
To descend from a curb, the chair is first backed near the edge of the curb and the levers 12 are raised and hooked on the studs 24 which lowers the plungers 14 to contact the level below. The chair is then backed substantially to the position shown in FIG. 4. The levers 12 are then lowered in control of the occupant which-lowers the rear of the chair y to the position shown in H6. 3. The chair is then backed until the front portion drops from the curb to the level below. A plurality of studs 25 could be provided in bar 25, as shown, to accommodate van'ousheights of curbs.
in the transition of the chair from position shown in FIG. 3
to that shown in FIG. 4, it will be noted that the plungers 14 are forcibly inclined toward the front of the chair by the manipulation of the levers 12. This action forces the drive wheels against the face of the curb during the raising of the rear of the chair and is most essential to insure proper operating. This inclination of the plungers 14 is effected by the fulcrum of the levers 12 being positioned above and forward of the center of the drive wheels of the chair.
Whereas 1 show my improvement to wheelchairs as attachments thereto, it is obvious that the same could be built into wheel chairs as an integral part thereof when the chair is manufactured. Therefore, 1 do not wish to be confined to the exact details set forth as the same are susceptible of modification within the spirit and scope of the invention.
lclaim:
1. In combination with a conventional wheelchair an attachment to accomplish a curb-climbing and descending function comprising a clamp attached to each side frame of the chair and near the back thereof and a lever pivotally attached to each clamp, to swing fore and aft relative to the chair the forward end of each lever, including a handle disposed for manipulation by the occupant of the chair means attached to each side frame of the chair for use in holding said levers at various operational positions, an upwardly extending plunger pivotally attached to the other end of each lever and disposed to contact the lever surface when the levers are manipulated to raise or lower the rear portion of the chair, which ever the case may warrant, when the front portion of the chair is upon a curb or other elevated surface, an apertured guide means for slidably engaging each said plunger attached to the lower horizontal bar of each side frame of the chair, and a wheel rotatively mounted at the rear of each guide and disposed to check the backward tipping of the chair as required to place the front portion of the chair upon a curb or other elevated, surface.
2. An occupant propelled and controlled curb-climbing wheelchair comprising a pair of rigid side frames sustained in spaced relationship by lateral structure, said structure forming a chair comprising a seat, a back and a footrest, a drive wheel rotatively mounted on each side frame at the rear of the chair and a swivel wheel rotatively mounted to each side frame at the front or footrest end of the chair, a manually operated brake for each drive wheel attached to each side frame, curbclimbing means integral with each side frame comprising a lever pivotally mounted to each side frame near the back of the chair to swing fore and aft relative to the chair, the forward end of each lever including a handle disposed for manipulation by the occupant of the chair, means on each side frame for use in holding said levers at various operational positions an upwardly extending plunger pivotally attached to the other end of each lever and disposed to contact the level surface when the levers are manipulated to raise or lower the rear of the chair, which ever the case may warrant, when the front portion of the chair is upon a curb or other elevated surface an apertured guide for slidably engaging each said plunger integral to each side frame of the chair, and a wheel rotatively mounted to each side frame at the rear of each guide and disposed to check the backward tipping of the chair as required to place the front portion of the chair upon a curb or other elevated surface.
Claims (2)
1. In combination with a conventional wheelchair an attachment to accomplish a curb-climbing and descending function comprising a clamp attached to each side frame of the chair and near the back thereof and a lever pivotally attached to each clamp, to swing fore and aft relative to the chair the forward end of each lever, including a handle disposed for manipulation by the occupant of the chair means attached to each side frame of the chair for use in holding said levers at various operational positions, an upwardly extending plunger pivotally attached to the other end of each lever and disposed to contact the lever surface when the levers are manipulated to raise or lower the rear portion of the chair, which ever the case may warrant, when the front portion of the chair is upon a curb or other elevated surface, an apertured guide means for slidably engaging each said plunger attached to the lower horizontal bar of each side frame of the chair, and a wheel rotatively mounted at the rear of each guide and disposed to check the backward tipping of the chair as required to place the front portion of the chair upon a curb or other elevated surface.
2. An occupant propelled and controlled curb-climbing wheelchair comprising a pair of rigid side frames sustained in spaced relationship by lateral structure, said structure forming a chair comprising a seat, a back and a footrest, a drive wheel rotatively mounted on each side frame at the rear of the chair and a swivel wheel rotatively mounted to each side frame at the front or footrest end of the chair, a manually operated brake for each drive wheel attached to each side frame, curb-climbing means integral with each side frame comprising a lever pivotally mounted to each side frame near the back of the chair to swing fore and aft relative to the chair, the forward end of each lever including a handle disposed for manipulation by the occupant of the chair, means on each side frame for use in holding said levers at various operational positions an upwardly extending plunger pivotally attached to the other end of each lever and disposed to contact the level surface when the levers are manipulated to raise or lower the rear Of the chair, which ever the case may warrant, when the front portion of the chair is upon a curb or other elevated surface an apertured guide for slidably engaging each said plunger integral to each side frame of the chair, and a wheel rotatively mounted to each side frame at the rear of each guide and disposed to check the backward tipping of the chair as required to place the front portion of the chair upon a curb or other elevated surface.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US82591369A | 1969-05-19 | 1969-05-19 |
Publications (1)
Publication Number | Publication Date |
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US3573877A true US3573877A (en) | 1971-04-06 |
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ID=25245228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US825913A Expired - Lifetime US3573877A (en) | 1969-05-19 | 1969-05-19 | Curb-climbing attachment for wheel chairs |
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US (1) | US3573877A (en) |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3848883A (en) * | 1973-08-08 | 1974-11-19 | S Breacain | Wheelchair anti-tip apparatus |
US3905437A (en) * | 1973-07-27 | 1975-09-16 | U M I Kk | Electrically drivable wheelchair |
US3952822A (en) * | 1973-03-19 | 1976-04-27 | Stiftelsen Teknisk Hjalp At Handikappade Permobilstiftelsen | Electrically powered wheel-chair for indoor and outdoor use |
US4098521A (en) * | 1976-08-09 | 1978-07-04 | Reme Enterprises, Inc. | Wheelchair adaptable for passage in narrow spaces |
DE3239472A1 (en) * | 1981-10-27 | 1983-05-05 | The Spastics Society, London | FOLDING WHEELCHAIR |
US4618155A (en) * | 1985-11-13 | 1986-10-21 | Jayne Laurence I | Stair-climbing wheelchair |
AT381858B (en) * | 1985-08-27 | 1986-12-10 | Hartel Johann | Ancillary device making it possible to climb steps in wheelchairs and similar invalid vehicles |
US4962942A (en) * | 1989-05-22 | 1990-10-16 | Triodyne Inc. | Minimum energy curb negotiating wheelchair |
GB2258196A (en) * | 1991-01-17 | 1993-02-03 | Frederick Reginald Vincent | Kerb negotiator |
US5222567A (en) * | 1991-04-26 | 1993-06-29 | Genus Inc. | Power assist device for a wheelchair |
US5228709A (en) * | 1992-09-10 | 1993-07-20 | Kung-Hsiung Wu | Wheelchair driving mechanism |
US5269227A (en) * | 1992-03-31 | 1993-12-14 | Robert C. Warren | Motorized portable system and method for aiding persons in ascending or descending stairways |
US5522322A (en) * | 1992-03-31 | 1996-06-04 | Robert C. Warren | Motorized system and method for aiding physically-impaired persons in moving between different positions |
US6047979A (en) * | 1998-04-03 | 2000-04-11 | Geer Products Ltd. | Wheelchair anti-tipping device |
US20030075365A1 (en) * | 2001-10-19 | 2003-04-24 | Fought Gerald E. | Wheelchair suspension having pivotal motor mount |
US6554086B1 (en) | 2000-10-27 | 2003-04-29 | Invacare Corporation | Obstacle traversing wheelchair |
WO2003065959A2 (en) * | 2002-02-05 | 2003-08-14 | Ruty Gabrieli | Device and method for traversing curb in a wheelchair |
US20040159476A1 (en) * | 2001-10-10 | 2004-08-19 | Molnar James H. | Wheelchair suspension |
US20060076747A1 (en) * | 2004-10-08 | 2006-04-13 | Sunrise Medical Hhg Inc. | Wheelchair suspension system |
US20060076748A1 (en) * | 2004-10-08 | 2006-04-13 | Sunrise Medical Hhg Inc. | Wheelchair with damping mechanism |
US20060244249A1 (en) * | 2002-10-25 | 2006-11-02 | Gerold Goertzen | Suspension for wheeled vehicles |
WO2007132188A1 (en) * | 2006-05-11 | 2007-11-22 | Steadman William D | Wheelchair lifting arrangement |
US20080012356A1 (en) * | 2006-06-22 | 2008-01-17 | Milagros Lugo | Apparatus for assisting in opening and closing the door Latch on a trailer of a tractor trailer combination |
US20080073863A1 (en) * | 2006-09-22 | 2008-03-27 | Mike Ehman | Step climbing wheelchair |
US20090045002A1 (en) * | 2005-11-15 | 2009-02-19 | A & M Consultancy & Investments B.V. | Wheelchair |
US20100004820A1 (en) * | 2007-02-14 | 2010-01-07 | Invacare Corporation | Wheelchair with suspension |
US20100102529A1 (en) * | 2007-01-12 | 2010-04-29 | Invacare International Sarl | Wheelchair with Suspension Arms for Wheels |
US8272461B2 (en) | 2007-02-08 | 2012-09-25 | Invacare Corporation | Wheelchair suspension |
US8539640B1 (en) | 2012-06-08 | 2013-09-24 | Herbert A. Waggener | Caster wheel lift and brake assembly |
US8641050B2 (en) * | 2012-02-15 | 2014-02-04 | DMG Enterprises, LLC | Apparatus for moving a non-ambulatory individual up and down steps |
US8650710B1 (en) | 2012-12-15 | 2014-02-18 | Herbert A. Waggener | Caster wheel lift and brake assembly |
US9010470B2 (en) | 2009-10-09 | 2015-04-21 | Invacare Corporation | Wheelchair suspension |
US9308143B2 (en) | 2012-02-15 | 2016-04-12 | Invacare Corporation | Wheelchair suspension |
US10464373B1 (en) | 2017-06-26 | 2019-11-05 | Herbert A Waggener | Caster wheel lift and brake assembly |
US11213441B2 (en) | 2002-10-25 | 2022-01-04 | Invacare Corporation | Suspension for wheeled vehicles |
US11903887B2 (en) | 2020-02-25 | 2024-02-20 | Invacare Corporation | Wheelchair and suspension systems |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US865514A (en) * | 1906-12-04 | 1907-09-10 | Paul Muellenmeister | Sick and invalid carriage. |
US1259064A (en) * | 1917-10-17 | 1918-03-12 | Fay M Wolff | Wheeled chair. |
US1739260A (en) * | 1929-12-10 | Invalid chair | ||
US2701005A (en) * | 1954-06-23 | 1955-02-01 | Nat Foundation For Infantile P | Curb climbing wheel chair |
-
1969
- 1969-05-19 US US825913A patent/US3573877A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1739260A (en) * | 1929-12-10 | Invalid chair | ||
US865514A (en) * | 1906-12-04 | 1907-09-10 | Paul Muellenmeister | Sick and invalid carriage. |
US1259064A (en) * | 1917-10-17 | 1918-03-12 | Fay M Wolff | Wheeled chair. |
US2701005A (en) * | 1954-06-23 | 1955-02-01 | Nat Foundation For Infantile P | Curb climbing wheel chair |
Cited By (86)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3952822A (en) * | 1973-03-19 | 1976-04-27 | Stiftelsen Teknisk Hjalp At Handikappade Permobilstiftelsen | Electrically powered wheel-chair for indoor and outdoor use |
US3905437A (en) * | 1973-07-27 | 1975-09-16 | U M I Kk | Electrically drivable wheelchair |
US3848883A (en) * | 1973-08-08 | 1974-11-19 | S Breacain | Wheelchair anti-tip apparatus |
US4098521A (en) * | 1976-08-09 | 1978-07-04 | Reme Enterprises, Inc. | Wheelchair adaptable for passage in narrow spaces |
DE3239472A1 (en) * | 1981-10-27 | 1983-05-05 | The Spastics Society, London | FOLDING WHEELCHAIR |
AT381858B (en) * | 1985-08-27 | 1986-12-10 | Hartel Johann | Ancillary device making it possible to climb steps in wheelchairs and similar invalid vehicles |
US4618155A (en) * | 1985-11-13 | 1986-10-21 | Jayne Laurence I | Stair-climbing wheelchair |
US4962942A (en) * | 1989-05-22 | 1990-10-16 | Triodyne Inc. | Minimum energy curb negotiating wheelchair |
GB2258196A (en) * | 1991-01-17 | 1993-02-03 | Frederick Reginald Vincent | Kerb negotiator |
US5222567A (en) * | 1991-04-26 | 1993-06-29 | Genus Inc. | Power assist device for a wheelchair |
US5269227A (en) * | 1992-03-31 | 1993-12-14 | Robert C. Warren | Motorized portable system and method for aiding persons in ascending or descending stairways |
US5363771A (en) * | 1992-03-31 | 1994-11-15 | Robert C. Warren | Motorized portable system for aiding persons in ascending or descending stairways |
US5522322A (en) * | 1992-03-31 | 1996-06-04 | Robert C. Warren | Motorized system and method for aiding physically-impaired persons in moving between different positions |
US5228709A (en) * | 1992-09-10 | 1993-07-20 | Kung-Hsiung Wu | Wheelchair driving mechanism |
US6047979A (en) * | 1998-04-03 | 2000-04-11 | Geer Products Ltd. | Wheelchair anti-tipping device |
US20100013172A1 (en) * | 2000-10-27 | 2010-01-21 | Invacare Corporation | Obstacle traversing wheelchair |
US9149398B2 (en) | 2000-10-27 | 2015-10-06 | Invacare Corporation | Obstacle traversing wheelchair |
US9987177B2 (en) | 2000-10-27 | 2018-06-05 | Invacare Corporation | Obstacle traversing wheelchair |
US7597163B2 (en) | 2000-10-27 | 2009-10-06 | Invacare Corporation | Obstacle traversing wheelchair |
US8172016B2 (en) | 2000-10-27 | 2012-05-08 | Invacare Corporation | Obstacle traversing wheelchair |
US6923280B2 (en) | 2000-10-27 | 2005-08-02 | Invacare Corporation | Obstacle traversing wheelchair |
US6935448B2 (en) | 2000-10-27 | 2005-08-30 | Invacare Corporation | Obstacle traversing wheelchair |
US20050225040A1 (en) * | 2000-10-27 | 2005-10-13 | Gerold Goertzen | Obstacle traversing wheelchair |
US20060021806A1 (en) * | 2000-10-27 | 2006-02-02 | Invacare Corporation | Obstacle traversing wheelchair |
US8636089B2 (en) | 2000-10-27 | 2014-01-28 | Invacare Corporation | Obstacle traversing wheelchair |
US6554086B1 (en) | 2000-10-27 | 2003-04-29 | Invacare Corporation | Obstacle traversing wheelchair |
US7219755B2 (en) | 2000-10-27 | 2007-05-22 | Invacre Corp. | Obstacle traversing wheelchair |
US20060255581A1 (en) * | 2000-10-27 | 2006-11-16 | Gerold Goertzen | Obstacle traversing wheelchair |
US8925943B2 (en) | 2001-10-10 | 2015-01-06 | Invacare Corp. | Wheelchair suspension |
US20040159476A1 (en) * | 2001-10-10 | 2004-08-19 | Molnar James H. | Wheelchair suspension |
US7055634B2 (en) | 2001-10-10 | 2006-06-06 | Invacare Corporation | Wheelchair suspension |
US7040429B2 (en) | 2001-10-10 | 2006-05-09 | Invacare Corporation | Wheelchair suspension |
US9370455B2 (en) | 2001-10-10 | 2016-06-21 | Invacare Corporation | Wheelchair suspension |
US8172015B2 (en) | 2001-10-10 | 2012-05-08 | Invacare Corporation | Wheelchair suspension |
US20090091092A1 (en) * | 2001-10-10 | 2009-04-09 | Invacare Corporation | Wheelchair suspension |
US7472767B2 (en) | 2001-10-10 | 2009-01-06 | Invacare Corporation | Wheelchair suspension |
US20080208394A1 (en) * | 2001-10-19 | 2008-08-28 | Invacare Corporation | Wheelchair suspension |
US7374002B2 (en) | 2001-10-19 | 2008-05-20 | Invacare Corporation | Wheelchair suspension |
US7066290B2 (en) | 2001-10-19 | 2006-06-27 | Invacare Corp. | Wheelchair suspension having pivotal motor mount |
US20030075365A1 (en) * | 2001-10-19 | 2003-04-24 | Fought Gerald E. | Wheelchair suspension having pivotal motor mount |
US8573341B2 (en) | 2001-10-19 | 2013-11-05 | Invacare Corporation | Wheelchair suspension |
WO2003065959A3 (en) * | 2002-02-05 | 2004-04-01 | Ruty Gabrieli | Device and method for traversing curb in a wheelchair |
WO2003065959A2 (en) * | 2002-02-05 | 2003-08-14 | Ruty Gabrieli | Device and method for traversing curb in a wheelchair |
US11213441B2 (en) | 2002-10-25 | 2022-01-04 | Invacare Corporation | Suspension for wheeled vehicles |
US9925100B2 (en) | 2002-10-25 | 2018-03-27 | Invacare Corporation | Suspension for wheeled vehicles |
US10512572B2 (en) | 2002-10-25 | 2019-12-24 | Invacare Corporation | Suspension for wheeled vehicles |
US9364377B2 (en) | 2002-10-25 | 2016-06-14 | Invacare Corporation | Suspension for wheeled vehicles |
US8534679B2 (en) | 2002-10-25 | 2013-09-17 | Invacare Corporation | Suspension for wheeled vehicles |
US20060244249A1 (en) * | 2002-10-25 | 2006-11-02 | Gerold Goertzen | Suspension for wheeled vehicles |
US20060076748A1 (en) * | 2004-10-08 | 2006-04-13 | Sunrise Medical Hhg Inc. | Wheelchair with damping mechanism |
US20060076747A1 (en) * | 2004-10-08 | 2006-04-13 | Sunrise Medical Hhg Inc. | Wheelchair suspension system |
US20090045002A1 (en) * | 2005-11-15 | 2009-02-19 | A & M Consultancy & Investments B.V. | Wheelchair |
WO2007132188A1 (en) * | 2006-05-11 | 2007-11-22 | Steadman William D | Wheelchair lifting arrangement |
US20080012356A1 (en) * | 2006-06-22 | 2008-01-17 | Milagros Lugo | Apparatus for assisting in opening and closing the door Latch on a trailer of a tractor trailer combination |
US7540504B2 (en) * | 2006-09-22 | 2009-06-02 | Mike Ehman | Step climbing wheelchair |
US20080073863A1 (en) * | 2006-09-22 | 2008-03-27 | Mike Ehman | Step climbing wheelchair |
US8297388B2 (en) | 2007-01-12 | 2012-10-30 | Invacare International Sarl | Wheelchair with suspension arms |
US20100102529A1 (en) * | 2007-01-12 | 2010-04-29 | Invacare International Sarl | Wheelchair with Suspension Arms for Wheels |
US8794359B2 (en) | 2007-02-08 | 2014-08-05 | Invacare Corporation | Wheelchair suspension |
US11464687B2 (en) | 2007-02-08 | 2022-10-11 | Invacare Coporation | Wheelchair suspension |
US11819464B2 (en) | 2007-02-08 | 2023-11-21 | Invacare Corporation | Wheelchair suspension |
US10265229B2 (en) | 2007-02-08 | 2019-04-23 | Invacare Corporation | Wheelchair suspension |
US10912690B2 (en) | 2007-02-08 | 2021-02-09 | Invacare Corporation | Wheelchair suspension |
US8272461B2 (en) | 2007-02-08 | 2012-09-25 | Invacare Corporation | Wheelchair suspension |
US9603762B2 (en) | 2007-02-08 | 2017-03-28 | Invacare Corporation | Wheelchair suspension |
US11535078B2 (en) | 2007-02-14 | 2022-12-27 | Invacare Corporation | Stability control system |
US9827823B2 (en) | 2007-02-14 | 2017-11-28 | Invacare Corporation | Stability control system |
US8910975B2 (en) | 2007-02-14 | 2014-12-16 | Invacare Corporation | Wheelchair with suspension |
US10532626B2 (en) | 2007-02-14 | 2020-01-14 | Invacare Corporation | Stability control system |
US20100004820A1 (en) * | 2007-02-14 | 2010-01-07 | Invacare Corporation | Wheelchair with suspension |
US9346335B2 (en) | 2007-02-14 | 2016-05-24 | Invacare Corporation | Stability control system |
US11850906B2 (en) | 2007-02-14 | 2023-12-26 | Invacare Corporation | Stability control system |
US11097589B2 (en) | 2007-02-14 | 2021-08-24 | Invacare Corporation | Stability control system |
US11096845B2 (en) | 2009-10-09 | 2021-08-24 | Invacare Corporation | Wheelchair suspension |
US9913768B2 (en) | 2009-10-09 | 2018-03-13 | Invacare Corporation | Wheelchair suspension |
US9010470B2 (en) | 2009-10-09 | 2015-04-21 | Invacare Corporation | Wheelchair suspension |
US11857470B2 (en) | 2009-10-09 | 2024-01-02 | Invacare Corporation | Wheelchair suspension |
US10434019B2 (en) | 2012-02-15 | 2019-10-08 | Invacare Corporation | Wheelchair suspension |
US8641050B2 (en) * | 2012-02-15 | 2014-02-04 | DMG Enterprises, LLC | Apparatus for moving a non-ambulatory individual up and down steps |
US11234875B2 (en) | 2012-02-15 | 2022-02-01 | Invacare Corporation | Wheelchair suspension |
US9700470B2 (en) | 2012-02-15 | 2017-07-11 | Invacare Corporation | Wheelchair suspension |
US9308143B2 (en) | 2012-02-15 | 2016-04-12 | Invacare Corporation | Wheelchair suspension |
US8539640B1 (en) | 2012-06-08 | 2013-09-24 | Herbert A. Waggener | Caster wheel lift and brake assembly |
US8650710B1 (en) | 2012-12-15 | 2014-02-18 | Herbert A. Waggener | Caster wheel lift and brake assembly |
US10464373B1 (en) | 2017-06-26 | 2019-11-05 | Herbert A Waggener | Caster wheel lift and brake assembly |
US11903887B2 (en) | 2020-02-25 | 2024-02-20 | Invacare Corporation | Wheelchair and suspension systems |
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