Land vehicles – Wheeled – Occupant propelled type
Reexamination Certificate
2005-01-04
2005-01-04
Lerner, Avraham (Department: 3611)
Land vehicles
Wheeled
Occupant propelled type
C280S284000
Reexamination Certificate
active
06837507
ABSTRACT:
A modular suspension strut apparatus provides a bicycle with a relocatable center of gravity to adjust the bicycle to the rider and to terrain conditions. The combined center of gravity of a bicycle and rider is adjustable by moving and clamping a strut within a strut tube. A crank axle housing at the bottom of the strut and a seat post at the top are shifted vertically, while maintaining a fixed seat axle distance. The strut is resiliently mounted within the strut tube by an internal or external spring or springs to absorb shocks. Spring force is adjusted by adjusting an air pressure with an external air pump or on board pumps. Spring forces may be adjusted while seated or in motion by turning knobs or handwheel rings and/or by other means. Strut movement within the strut tube is limited to axial reciprocation in a preset range. Elastomeric rings prevent shock at limits of the strut movements. The strut tube is made of three joined parts, a center tube and top and base guides. The guides connect to frame tubes and stays and provide bearings for the strut.
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Creighton Wray James
Lerner Avraham
Narasimhan Meera P.
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