Land vehicles – Wheeled – Occupant propelled type
Patent
1998-03-27
1999-11-02
Mai, Lanna
Land vehicles
Wheeled
Occupant propelled type
B62K 100
Patent
active
059755504
ABSTRACT:
A bicycle with a torsional shock absorber comprised of a torsion spring assembly. The elements of the torsion spring assembly include: housing, a shaft positioned within the housing, a rubbery substance bonded to the interior surface of the housing and the outer surface of the shaft. The torsional shock absorber is mounted on the bicycle such that shock forces are converted into rotational forces tending to rotate the shaft within the housing. These rotational forces are resisted by the spring force created by the rubbery substance within the torsion spring assembly; thereby absorbing the shock forces. In a preferred embodiment, the front and rear portions of the bicycle frame pivot about the pedal spindle axis. The housing of the torsion spring assembly is rigidly connected to the front portion of the bicycle frame in-between the top tube and middle brace and just in front of the seat tube. The rear portion of the bicycle frame is pivotally connected to two torsion arms rigidly connected to the shaft.
REFERENCES:
patent: 2092613 (1937-09-01), Olley
patent: 2203342 (1940-06-01), Sloman
patent: 2452758 (1948-11-01), Hutchins
patent: 2915306 (1959-12-01), Hickman
patent: 3151878 (1964-10-01), Uncles
patent: 3177559 (1965-04-01), Boschi et al.
patent: 4421337 (1983-12-01), Pratt
patent: 5409249 (1995-04-01), Busby
Fleming Faye M.
Mai Lanna
Ross John R.
Ross III John R.
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