Electric power-assisted wheelchair

Details Electric power-assisted wheelchair Electric power-assisted wheelchair

1997-02-14

1998-10-06

Sircus, Brian

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to stress in body or material

318432, 318139, 318646, 180907, G02B 500

Patent

active

058181890

ABSTRACT:
A power-assisted wheelchair wherein the power-assist for the wheels is based upon the manual force exerted on both of the wheels. The power-assist is continued for a brief time period after manual power input is stopped. The continuing assist is provided equally to each wheel so that the wheelchair will coast in a straight direction. The wheels of the wheelchair are readily detachable with the backing plate prime mover and transmission for driving the wheel.

REFERENCES:
patent: 4050533 (1977-09-01), Seamone
patent: 4125169 (1978-11-01), Harris et al.
patent: 4415049 (1983-11-01), Wereb
patent: 4422515 (1983-12-01), Loveless
patent: 4634941 (1987-01-01), Klimo
patent: 4667136 (1987-05-01), Bell
patent: 4767940 (1988-08-01), Tuttle
patent: 5222567 (1993-06-01), Broadhead et al.
patent: 5234066 (1993-08-01), Ahsing et al.
patent: 5270624 (1993-12-01), Lautzenhiser
patent: 5427193 (1995-06-01), Avakian
patent: 5497056 (1996-03-01), Kurland et al.
patent: 5648708 (1997-07-01), Littlejohn
European Search Report dated Nov. 26, 1997.

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