Bicycle transmission assembly

Details Bicycle transmission assembly Bicycle transmission assembly

1982-01-26

1983-12-06

Peters, Jr., Joseph F.

Motor vehicles

Special wheel base

Having only two wheels

180 74, B62M 1304

Patent

active

044187840

ABSTRACT:
The invention provides a drive train system for a motor which can be bolted onto a conventional bicycle frame. The drive train has a pair of spaced parallel swing arms having two parts integrally joined at an apex and pivoting at the apex about the centerline of a crankshaft in the motor. The swing arms are fitted with an integral torque bar and an axle shaft, extending between the parallel swing arms. A relatively large diameter drive roller, with a special cleated surface geometry, is mounted on the axle shaft and driven from the motor shaft by way of gears, a chain or a belt. As the swing arms move in an arc, the center distances from the crankshaft to the axle shaft are always maintained constant. This enables the engine to be rigidly mounted in a symmetrical position over the bicycle wheel. A contact pressure between the cleated roller and the wheel is achieved by elongated coiled springs extending from the swing arms to a bicycle frame member. A clutching action overcomes the pull of the springs and swings the roller up and away from the tire.

REFERENCES:
patent: 1517338 (1924-12-01), Bessiere
patent: 2069679 (1937-02-01), Petmecky
patent: 2328233 (1943-08-01), Schunk
patent: 2954836 (1960-10-01), Cavanaugh
patent: 3431994 (1969-03-01), Wood

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