Land vehicles – Wheeled – Occupant propelled type
Patent
1996-01-16
1999-08-24
Ellis, Christopher P.
Land vehicles
Wheeled
Occupant propelled type
2802421, 2802501, B62M 114
Patent
active
059415479
ABSTRACT:
A manually propelled wheelchair (10) powered by the chair occupant. Hand power levers (11,12) are pivoted on each side of the chair frame (15). Drive cables (25) connect each lever to a wheel pulley (20) which in turn acts through one-way clutches to propel the wheels (16, 17) during the power stroke as the lever pulls the drive cable. The clutches permit free wheeling of the chair except during the application of drive power. Recoil springs (46) rewind the cable on the pulley during the lever's return stroke. The point of cable attachment (19) to the lever is changed by rotating the lever handle (21) to change the ratio of lever movement to wheel movement. Moving the attachment point below the pivot point reverses the direction of the power and the return strokes. Directional control is obtained by differential application of power to the wheels and by selective wheel braking. For single hand operation, a single axle is used for both wheels. Directional control is provided by differential wheel braking with brake control levers for each wheel mounted on the single hand power lever.
REFERENCES:
patent: 4453729 (1984-06-01), Lucken
patent: 4560181 (1985-12-01), Herron
patent: 4583754 (1986-04-01), Seeliger
patent: 4652026 (1987-03-01), Byrge
patent: 4667975 (1987-05-01), Fabiano
patent: 4735431 (1988-04-01), Tait
patent: 4762332 (1988-08-01), Seol
patent: 4811964 (1989-03-01), Horn
patent: 4865344 (1989-09-01), Romero, Sr. et al.
patent: 4993732 (1991-02-01), Wedemeyer
patent: 5242179 (1993-09-01), Beddome
patent: 5297810 (1994-03-01), Lukyanov
patent: 5413367 (1995-05-01), Ochiai
Ellis Christopher P.
Johnson R. B.
LandOfFree
Manually propelled wheelchair device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Manually propelled wheelchair device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manually propelled wheelchair device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-459720