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 Title: |
US3664450:
ELECTRICALLY POWERED FOUR-WHEELED SINGLE VEHICLE
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| Country: |
US United States of America
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| Inventor: |
Udden, Per Edward Carl; 861 00 Timra, Sweden
Engman, Bert Hjalmar; 861 00 Timra, Sweden
Graf, Siegfried; 861 00 Timra, Sweden
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| Assignee: |
None
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| Published / Filed: |
1972-05-23
/ 1970-06-01
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| Application Number: |
US1970000042116
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| IPC Code: |
Advanced:
A61G 5/04;
B60K 1/00;
B62D 7/08;
IPC-7:
B60K 1/00;
B60L 11/18;
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| ECLA Code: |
A61G5/04A6; B60K1/00; K61G5/06; K61G5/10G; K61G5/10H; K61G5/10S12; K61G5/10S14; K61G5/10Z2; K61G5/12H;
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| U.S. Class: |
Current:
180/065.1;
180/907;
280/124.113;
280/638;
D12/001;
D12/086;
D12/088;
D12/131;
Original:
180/065.R;
280/034.R;
280/111;
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| Field of Search: |
180/065,70,55,56,57,58,59,60,61,62,63,54 F
280/111,112,34
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| Priority Number: |
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| Abstract: |
Electrically powered four-wheeled single vehicles especially for disabled persons and invalids and specifically made for out-door use must have such stabilizing qualities that under all circumstances there is no risk for the chair to turn over even if it will have to force different kind of obstacles such as curbs. A further object of such vehicles is to provide a simple and safe steering operation so that the forces from the obstacles to be forced must not be transmitted to the steering handle, since patients in many cases have considerably reduced power to control such forces by hand. These objects are realized in the present invention substantially by the fact that the vehicle comprises a rear and a front portion which are swingably connected to each other by means of telescopic pipes or the like running substantially in parallel with the ground and in the longitudinal direction of the vehicle. To meet the requirement of a safe and unaffected steering operation the front wheels are neutrally positioned in a way that the extension of the swivel axles will cut the contact surfaces between the corresponding wheels and the ground.
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| Attorney, Agent or Firm: |
Philpitt, Fred C. ;
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| Primary / Asst. Examiners: |
Hersch, Benjamin; Smith, Milton L.
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Family: |
Show 13 known family members
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First Claim:
Show all 4 claims |
We claim:
1. An electrically powered four-wheeled vehicle that is especially useful for invalids, comprising in combination:
- a. a rear section and a front section,
- b. said rear section including a pair of driving wheels, means for driving said wheels and a driver's seat,
- c. said front section comprising a pair of front wheels and a framework interconnecting said wheels,
- d. braking means for at least some of said wheels and steering means for said front wheels,
- e. said rear and front sections being interconnected to each other by means of a pair of telescoping tubular shafts, one shaft being connected to said rear section and one shaft being connected to said front section,
- f. the said tubular telescoping shafts of e being positioned in axial alignment with each other along the longitudinal axis of the vehicle and having at least limited rotative movement relative to each other,
- g. said tubular shafts being disposed above the ground at a height which is less than the radius of the smallest wheels on the vehicle.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 40 U.S. patent(s) that reference this one
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