Land vehicles – Wheeled – Occupant propelled type
Patent
1998-04-10
2000-08-29
Dickson, Paul N.
Land vehicles
Wheeled
Occupant propelled type
267153, B62K 302
Patent
active
061096377
ABSTRACT:
A bicycle frame uses an existing frame member--a seat stay--as a spring, and absorbs high frequency, low amplitude vibration with effective damping. The spring force constant can be adjusted for rider weight, riding style, road or terrain conditions, or the like, and the system is lightweight. Each seat stay is connected at a top end to the seat tube, and pivotally connected at the bottom end to the rear drop out, and has a circular arcuate curvature adjacent the bottom end with a radius of between about 11-16 inches and subtending an angle of between about 20-60 degrees. A damping/spring constant increasing element, comprising a metal strip bonded to elastomeric material (such as silicone) having a durometer between about 20-70 Shore A, is bolted to the seat stay convex arcuate portion, and can be replaced with a unit having a different durometer.
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RSTUSA Advertisements for Downhill, Cross Country, and Sport Suspension Forks, and Rear Suspension Springs; 1998.
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Dickson Paul N.
Great American Bicycle Co., LLC
Lerner Avraham H.
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