Land vehicles – Wheeled – Occupant propelled type
Patent
1993-07-07
1995-02-21
Hill, Mitchell J.
Land vehicles
Wheeled
Occupant propelled type
280260, B62M 102
Patent
active
053909461
ABSTRACT:
A shifting clutch to improve the constant dual-wheel driven bicycle described in U.S. Pat. No. 5,116.070. The clutch allows a dual-wheel driven bicycle to be shifted, while moving or stationary, from single to a dual-wheel drive or vice-versa. This improves the dual-wheel drive bicycle because the constant dual-wheel drive creates additional rotational resistance and the dual-wheel drive is not needed in all riding situations all of the time. The clutch is a spring-loaded hinge device that holds the rear gear assembly of the prior art. A wire is attached to the clutch frame. The wire is guided along the bicycle frame to the handlebar of the bicycle. The wire is secured to a lever on the handlebar. The bicycle rider may move the lever to pull the wire that hinges the clutch frame and the attached rear gear into a rear ring gear. This engages the dual-wheel drive mode. The bicycle rider may move the lever to release the wire tension. The spring-loaded clutch frame is then allowed to hinge outward to release the rear gear assembly from the rear ring gear to disengage the dual-wheel drive mode. The engagement and disengagement of the rear gear assembly into the rear ring gear shifts the dual wheel drive mode on and off. The shifting clutch improves the dual-wheel drive bicycle to allow it to roll as free as a single wheel drive bicycle when the dual-wheel drive mode is not needed. The dual-wheel drive mode is utilized only when the riding situation demands to allow the improved dual-wheel drive bicycle to perform better than a single-wheel drive bicycle.
REFERENCES:
patent: 5004258 (1991-04-01), Becoat
patent: 5116070 (1992-05-01), Becoat
patent: 5158314 (1992-10-01), Pinos
patent: 5224725 (1993-07-01), Erlston
patent: 5253889 (1993-10-01), Kaminski
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