Electric wheel-chair

Details Electric wheel-chair Electric wheel-chair

1988-12-19

1990-08-28

Mitchell, David M.

Motor vehicles

Steering by driving

Independently operable drive motors

180 66, 180 651, 180329, 180907, 2803041, A61G 504

Patent

active

049517660

ABSTRACT:
As a rule, wheel-chairs have large(-diameter) drive wheels (3) and small(-diameter) steerable wheels (5), and wheel-chairs for indoor operation have their drive wheels as their rear wheels, while wheel-chairs for outdoor operation have their drive wheels (3) as front wheels. In the wheel-chair according to the invention, the seat assembly (6) is mounted for rotation about a vertical axis by means of a supporting column (14) above the chassis (1), such that, depending on the purpose of use of the wheel-chair, the large drive wheels are selectively disposed in the front or rear position with respect to the seat(ing) direction. In this way, the wheel-chair may be used both inddors and outdoors in an optimum manner. Additional positioning alernatives of the seat assembly, e.g. at .+-.90.degree. relative to the chassis, open to the user new possibilities of utilization. By an automatic switchover of the control (or steering) lever in accordance with the position of the seat assembly, optimum operation of the wheel-chair is obtained.

REFERENCES:
patent: 4351562 (1982-09-01), Twitchell et al.
patent: 4513832 (1985-04-01), Engman

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