Hand operated wheel chair or exercise machine using racks operat

Details Hand operated wheel chair or exercise machine using racks operat Hand operated wheel chair or exercise machine using racks operat

1996-02-01

1998-06-09

Johnson, Brian L.

Land vehicles

Wheeled

Occupant propelled type

280246, 280252, 280253, A63B 6906

Patent

active

057623503

ABSTRACT:
This improvement is for a hand operated wheel chair or exercise machine. The machine uses two racks to operate two one way clutches to furnish forward motion from both the forward and backward strokes of the input lever arm. The mechanical advantage of the input lever arm is readily changeable to affect the overall gear ratio of the drive. Steering is accomplished by turning a wheel on the lever arm. The control is similar to that on a wheel controlled airplane.

REFERENCES:
patent: 1536788 (1925-05-01), Grady
patent: 4811964 (1989-03-01), Horn
patent: 5272928 (1993-12-01), Young
patent: 5542893 (1996-08-01), Petersen et al.
patent: 5653663 (1997-08-01), Mccahon

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