Land vehicles – Wheeled – Occupant propelled type
Patent
1993-07-28
1995-04-25
Focarino, Margaret A.
Land vehicles
Wheeled
Occupant propelled type
280283, 188285, 267 34, B62K 2528
Patent
active
054092485
ABSTRACT:
An improved bicycle suspension system and method are disclosed which provides a fully, or rear wheel only, suspended bicycle having improved shock absorbing characteristics. The system utilizes a portion of the hollow, horizontally disposed linear main frame member which extends from just below the seat to the handle bar assembly as an integral part of a hydraulic or pneumatic shock absorber. The portion is sealed against fluid leakage and has a piston assembly slidably positioned therein, the piston assembly being linked by a single link unit to a rear wheel supporting framework which is also pivotably connected with the main frame above the chain line at a structural support joined to the two lower structural main frame members adjacent to the foot crank assembly. A load adjustable spring assembly is positioned in the portion and connected with the piston assembly, with spring preload being adjustable from the exterior of the shock absorber.
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patent: Re13383 (1912-03-01), Harley
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patent: 4582343 (1986-04-01), Waugh
patent: 4971344 (1990-11-01), Turner
patent: 5131671 (1992-07-01), Wilhelms
Boehler Anne Marie
Burdick Harold A.
Focarino Margaret A.
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