Rocker arm rear suspension bicycle
Patent 5244224 Issued on September 14, 1993. Estimated Expiration Date: 
May 14, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 14, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSuspension bicycle Suspension bicycle Patent #: 5121937 InventorAssigneeApplicationNo. 884740 filed on 05/14/1992US Classes:280/284, Rear forks280/275YieldingExaminersPrimary: Focarino, Margaret A.Assistant: Hurley, Kevin Attorney, Agent or FirmForeign Patent References
International ClassB62K 025/30AbstractA bicycle frame having shock absorbing characteristics. The bicycle frame includes an elongate down tube and seat tube having a crossbar rigidly attached thereto and extending therebetween. Pivotally connected to a bottom bracket axle attached to the lower end of the seat tube is a rocker arm linkage. The frame further comprises a shock absorber having one end pivotally connected to the crossbar and a second end pivotally connected to the rocker arm linkage. Additionally, first and second chain stay members are provided having front ends pivotally connected to the opposed sides of the rocker arm linkage and rear ends rigidly attached to a pair of rear tire axle receiving members. First and second chain stay members are also included which have front ends pivotally connected to the crossbar and rear ends pivotally connected to the pair of rear tire axle receiving members. The rocker arm linkage is normally held in abutting contact against the axle receiving bracket by the force exerted thereagainst by the shock absorber and the chain stay members. Upon the exertion of a sufficient upward force to the rear tire axle receiving members, the rocker arm linkage is pivoted and caused to move out of abutting contact with the axle receiving bracket and compress the shock absorber.Other References
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