Patent ID: 7591475
Filing Date: 2009-09-22
Classification: B62K

Abstract:
1. A cycle frame including a main frame section including a bottom bracket structure and a seat junction structure, a pair of chainstays connected at a first end thereof to said bottom bracket structure and at a second end thereof to rear wheel dropouts, and a wishbone seatstay arrangement comprising a pair of seatstays connected at a first end thereof to a crown and at a second end thereof pivotlessly to said rear wheel dropouts, comprising: a first extension section fixedly attached to said crown and extending in a direction generally towards said seat junction structure; a low friction guide component fixedly attached to said first extension section; a second extension section fixedly attached to said seat junction section and extending in a direction towards said wishbone seatstay arrangement, said second section having a cylindrical cross section defining a hollow interior having a long axis; wherein said low friction guide component is disposed within the hollow interior of said second extension section and such that said low friction guide component has a circumferential measure marginally less that the circumferential measure of said hollow interior of the second extension section to thereby permit motion of said low friction guide component within said hollow interior along the long axis of said hollow interior, said first extension section sized relative to said hollow interior of said second extension section such that said motion of said low friction guide component is generally not restricted by said first extension section; whereby vertical motion of the rear wheel dropouts relative to the main frame section is translated by way of the wishbone seatstay arrangement to motion of the low friction guide component within the hollow interior of the second extension, in a direction along the long axis of the second extension, and is resisted at least in part by a moment provided by the chainstays.