Land vehicles – Wheeled – Occupant propelled type
Patent
1988-08-12
1989-08-22
Pekar, John A.
Land vehicles
Wheeled
Occupant propelled type
280250, 2802811, B62K 1900, B62M 112
Patent
active
048589420
ABSTRACT:
A bicycle has both manual drive and pedal drive assemblies which may be operated simultaneously or independently. The manual drive assembly is connected to the front wheel and the pedal drive assembly is connected to the rear wheel. Both the manual and pedal drive assemblies incorporate chain drive mechanisms as well as crank assemblies. The manual crank assembly is mounted at the top of the front fork journal and also serves as a handlebar assembly for steering the bicycle. In order to provide sufficient clearance between the chain which extends alongside the front forks and the frame, the frame is bent laterally (just behind the steering sleeve) to accommodate the chain during steering movements. In a first embodiment, the frame member extends generally downwardly and rearwardly from the steering sleeve to a sufficient degree to provide sufficient clearance between the crank assembly to allow the bicycle to be steered while the front wheel is being manually driven. In a second embodiment, the horizontal frame crossmember is bent downwardly to a sufficient degree to provide sufficient clearance between the crank assembly to allow the bicycle to be steered while the front wheel is being driven.
REFERENCES:
patent: 505373 (1893-09-01), Sanford
patent: 4548420 (1985-10-01), Patroni
Middleton James B.
Pekar John A.
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