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 Title: |
US3952822:
Electrically powered wheel-chair for indoor and outdoor use
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Udden, Per; Timra, Sweden
Graf, Siegfrid; Fagervik, Sweden
Engman, Bert; Soberge, Sweden
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| Assignee: |
Stiftelsen Teknisk Hjalp at Handikappade Permobilstiftelsen, Timra, Sweden
other patents from STIFTELSEN TEKNISK HJALP AT HANDIKAPPADE PERMOBILSTIFTELSEN (545600) (approx. 1)
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| Published / Filed: |
1976-04-27
/ 1974-03-18
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| Application Number: |
US1974000452146
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| IPC Code: |
Advanced:
A61G 5/04;
A61G 5/10;
IPC-7:
B62D 61/12;
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| ECLA Code: |
A61G5/04A6; K61G5/10Z2; K61G5/10G; K61G5/10S10; K61G5/10S12; K61G5/10Z5; K61G5/12H; L62K204/00;
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| U.S. Class: |
Current:
180/216;
180/006.5;
180/065.6;
180/209;
180/907;
297/DIG.004;
D12/131;
Original:
180/021;
180/006.5;
180/027;
180/065.R;
180/DIG.3;
297/DIG.4;
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| Field of Search: |
180/021,25,26,27,DIG. 3,65 R
296/65 R
280/DIG. 5,150 A
297/240,DIG. 4
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| Priority Number: |
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| Abstract: |
An electrically powered wheel-chair for indoor and outdoor use comprising a pair of rear main wheels, which are non-pivotably connected with the frame-work of the chair, at least one of said wheels being driven by an electric motor. A steering wheel being rotatably connected with the frame-work of the wheel-chair and positioned in front of the main wheels, said steering wheel being asymmetrically located on one side of a longitudinal axis through the middle of the chair. A support wheel being positioned on the other side of said longitudinal axis relative to the steering wheel at such a level above a flat and horizontal ground surface that it will not touch this surface when the steering wheel directed straight ahead. The diameter of the support wheel is less than that of the steering wheel and the distance from the fore-most point of the steering wheel to a transverse axis through the centers of the main wheels is greater than the corresponding distance for the support wheel. To provide good stability the electric batteries are located in a case thus designed that the common center of gravity of the batteries will be located on the same side of the longitudinal axis of the chair as the steering wheel. The frame-work is moreover equipped with two auxiliary support wheels on either side of the chair and rearwards the main wheels.
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| Attorney, Agent or Firm: |
Becker, Walter ;
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| Primary / Asst. Examiners: |
Betts, Kenneth H.;
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Family: |
Show 9 known family members
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First Claim:
Show all 7 claims |
We claim:
1. An electrically powered wheel-chair for stable and maneuverable indoor and outdoor use, comprising in combination:
- a pair of rear main wheels, which are rigidly connected with the frame of the chair, at least one of said main wheels being driven by an electric traction motor,
- a front steering wheel, which is rotatably connected with the frame and located on one side of a longitudinal axis through the middle of the chair,
- a support wheel with less diameter than the steering wheel, said support wheel being connected with the frame and located on the other side of said longitudinal axis relative to said steering wheel at such a level that it will not touch a horizontal and even support surface when the steering wheel is directed straight ahead, whereby the fore-most point of the steering wheel is located ahead of the fore-most point of the support wheel, a portion of the frame positioned between the main wheels being designed in the form of a case, adapted to contain batteries, the common center of gravity of which will be located on the same side of the longitudinal axis of the chair as the steering wheel.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 85 U.S. patent(s) that reference this one
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