Wheel chair

Details Wheel chair Wheel chair

1986-06-17

1988-08-09

Love, John J.

Land vehicles

Wheeled

Occupant propelled type

74138, 74142, 74833, 192 28, 192 47, 192 64, 280236, 280244, 280246, 280253, 280255, 280258, B62M 104, B62M 114

Patent

active

047623322

ABSTRACT:
A wheelchair having a propulsion and speed change mechanism, the mechanism has a clutch with a cam clutch (21) and a cylindrical fly wheel (23) installed on a hub (24) of the shaft (25) of the main wheel of the chair. The clutch includes roller bearings (14), plate springs (22) and forward and backward regulating device (15). A matched union gear (20) is formed at the center of the cam clutch (21) and matched with a union gear (19) formed on a propulsion and speed change bar (12) so that the cam clutch (21) and the propulsion and speed change bar move as one body. The cam clutch (21) and the bar (12) are installed with a bearing (17) on the axle of the frame (13) of the wheelchair. A connecting rod (2) has one end connected to one of a plurality of holes (10) on the propulsion and speed change bar (12) with a fixing pin. The other end of the rod is connected to the hole (7) of the propulsion and speed change bar with a moveable pin (6). A forward and backward selector (4) is connected to the forward and backward regulating device with a wire.

REFERENCES:
patent: 1429196 (1922-09-01), Dughera
patent: 3084774 (1963-04-01), Liang
patent: 4272096 (1981-06-01), Efros
patent: 4358126 (1982-11-01), Mitchell et al.
patent: 4421334 (1983-12-01), Efros
patent: 4453729 (1984-06-01), Lucken
patent: 4506900 (1985-03-01), Korosue
patent: 4574649 (1986-03-01), Seol

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