Racing wheelchair

Details Racing wheelchair Racing wheelchair

1989-02-10

1991-07-02

Marmor, Charles A.

Land vehicles

Wheeled

Occupant propelled type

280266, 2803041, 297DIG4, G02M 114

Patent

active

050280643

ABSTRACT:
A positively steered racing wheelchair is disclosed which includes a frame support on a pair of large wheels and a positively steerable trailing wheel. A seat for the athlete is suspended from a central position of the frame and is configured such that the athlete sits in a very low position to improve stability and to advantageously place the leverage of the athlete's arms with respect to a pair of drive rings situated outboard the large wheels. Positive steering of the may be accomplished in various ways. One embodiment employs a laterally pivotal seat structure with actuating cables connected to the seat back such that pivotal motion of the seat, as the athlete leans into a turn, is communicated to the trailing wheel to effect steering. Another embodiment utilizes actuating cables attached to cuffs around the athlete's biceps such that the natural tendency to twist into a turn can be translated into steering forces. Yet another embodiment utilizes a harness strapped to the athlete with the actuating cables being attached to shoulder straps of the harness or at a lower position according to the preference and/or capability of the athlete. Still another, and currently the preferred, embodiment employs a hand operated handle adapted for fore and aft movement and coupled through cables to the steerable trailing wheel.

REFERENCES:
patent: 558019 (1896-04-01), Harshaw
patent: 2177793 (1939-10-01), Taylor
patent: 2681689 (1954-06-01), Breed
patent: 2896693 (1959-07-01), Schladebach
patent: 4066273 (1978-01-01), Lohr
patent: 4364580 (1982-12-01), Shapcott
patent: 4586723 (1986-05-01), Nabinger
patent: 4705284 (1987-11-01), Stout
patent: 4709939 (1987-12-01), Stewart

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