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 Title: |
US3794132:
SELF-PROPELLED WHEELCHAIR
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| Country: |
US United States of America
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| Inventor: |
Moon, Robert W.; Shorewood, WI
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| Assignee: |
Lakeside Manufacturing Inc., Milwaukee, WI
other patents from LAKESIDE MANUFACTURING INC. (327200) (approx. 8)
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| Published / Filed: |
1974-02-26
/ 1972-08-16
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| Application Number: |
US1972000281081
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| IPC Code: |
Advanced:
A61G 5/04;
IPC-7:
B62D 61/00;
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| ECLA Code: |
A61G5/04A2; K61G5/10G; K61G203/14;
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| U.S. Class: |
Current:
180/013;
180/065.1;
180/209;
280/210;
Original:
180/013;
180/026.R;
180/065.R;
280/111;
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| Field of Search: |
180/013,15,23,25,26 R,65,DIG. 3
188/2 F
280/111
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| Priority Number: |
| 1972-08-16 |
US1972000281081 |
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| Abstract: |
A self-powered wheelchair with four ground engaging wheels, the two rear wheels being mounted on a rear axle that is pivoted about a fore and aft axis at its mid-point for limited tilting in a vertical, transverse plane, one of the front wheels being an idler at one side of the chair, and the other front wheel being part of a power unit at the opposite side of the chair. The power unit is steerable about a vertical axis by turning a steering shaft that rises upwardly and turns rearwardly to present a tiller arm, such tiller arm having a control box at its upper end that presents a vertical palm engageable handle for turning the tiller, and a vertically depressible thumb engageable speed selector rod for governing the speed of the chair. There is also a brake mechanism associated with the rear wheels of which a part tilts with the rear axle and mounts brake shoes to apply desired braking force regardless of the degree of axle tilt.
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| Attorney, Agent or Firm: |
Seidel, Arthur H. ;
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| Primary / Asst. Examiners: |
Blunk, Evon C.; Cherry, Johnny D.
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Family: |
Show 7 known family members
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First Claim:
Show all 10 claims |
I claim:
1. In a wheelchair having a chair, a set of ground engaging wheels and space for an energy cell beneath the chair, the combination comprising:
- a. a pivot located beneath and at the rear of the chair providing a turning axis along the longitudinal center of the wheelchair;
- b. a rear axle connected substantially at its mid-point to said pivot for tilting in a vertical, transverse plane;
- c. a pair of ground engaging rear wheels, one at each end of said axle, located beneath the rear sides of the chair;
- d. a pair of motion limiting abutments, one on each side of said pivot, that are each disposed in vertical alignment with said rear axle, and at a spaced distance therefrom when said rear axle is in the horizontal;
- e. a front ground engaging idler wheel pivotally mounted at the front and one side of the chair for turning movement about a vertical axis;
- f. a drive motor unit pivotally mounted at the front of the chair on the side opposite said idler wheel, and having a drive motor and a depending ground engaging traction wheel in driven relation to the motor;
- g. said ground engaging traction wheel, idler wheel and pivoted rear wheels forming tripodal support points for the chair with the center area of the chair encompassed within the triangle defined by said traction wheel, said idler wheel and said pivot; and
- h. a steering shaft rising upwardly from said drive motor unit that is pivotable about a vertical axis for turning said drive motor unit.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 18 U.S. patent(s) that reference this one
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