US 4,397,369 AGranted

Power drive

OwnerGlenn F. Readinventor

Life of this patent

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Abstract

A power drive unit for driving a utilization mechanism such as, for example, a roadwheel of a light vehicle such as a bicycle, tricycle, or quadricycle. The utilization mechanism is driven from the output shaft of a prime mover mounted through a controllable clutch and chain drive train. Preferably, the prime mover is an internal combustion engine driven chain saw from which the saw chain and chain bar have beem removed and replaced by an adapter providing a chain and belt drive from the chain saw engine output shaft to a chainwheel coupled to the utilization mechanism, for example, a bicycle conventional chainwheel such as to drive the bicycle rear wheel through the conventional multi-speed hub or multi-speed sprocket cluster, or alternatively, to drive the front wheel of a bicycle through a chainwheel coupled to the front wheel hub, the front wheel hub being preferably a multi-speed hub with internal gears.

Claims22

Dependent claims

A power drive for coupling a prime mover to a utilization mechanism, said power drive comprising said prime mover having a housing and a power output shaft, a first toothed sprocket mounted on the output shaft of said prime mover, a support plate attached to said housing of said prime mover, a first shaft journaled through said support plate, a chainwheel mounted on one end of said first shaft, a chain driving said chainwheel from said first-toothed sprocket, a first pulley mounted on another end of said first shaft, a second shaft mounted on said support plate, a second pulley mounted on one end of said second shaft, a belt driving said second pulley from said first pulley, means for varying the tension of said belt from a mode whereby said belt is disengaged from at least one of said pulleys to a mode whereby said belt is engaged with both of said pulleys for driving said second pulley by said first pulley, a second toothed sprocket mounted on said second shaft, and chain drive means from said second toothed sprocket to said utilization mechanism.

Dependencies are inferred from the claim text.

Facts

Application: 06/253,691Filed 13 Apr 1981
Granted: 9 Aug 1983
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B62M 6/25
Rider propelled cycles with auxiliary combustion engine: power-driven at axle parts
B27B 17/0016
Chain saws; Equipment therefor: devices to adapt the chain saw for other purposes, e.g. drilling
B62M 6/10
Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor: rider propelled cycles with…
B62M 6/20
Rider propelled cycles with auxiliary combustion engine: power-driven at crank shaft parts