Patent ID: 6581919
Filing Date: 2003-06-24
Classification: B62J,F16F

Abstract:
A seat post for mounting between a frame and a seat of a cycle, said seat post comprising:(a) an outer member having a cylindrical bore defined by a sidewall with an inner cylindrical surface and a floor at one end of the bore; (b) an inner member having an end forming a piston and a sidewall with a cylindrical outer surface that slidingly, sealingly engages the inner cylindrical surface of the outer member to form a variable volume chamber in the outer member that is defined by the inner cylindrical sidewall, the piston and the floor; (c) a fixed volume chamber formed in the inner member and in fluid communication with the variable volume chamber through a restrictive flow orifice and a fluid passage formed in the inner member, wherein the fluid in the fixed volume chamber can flow into the variable volume chamber only by passing through the restrictive flow orifice and the fluid passage; (d) a check valve mounted along the fluid passage for allowing at least some fluid in the variable volume chamber to pass into the fixed volume chamber without passing through the restrictive flow orifice when the pressure in the variable volume chamber reaches a predetermined threshold; and (e) at least one elongated slot formed on one of the members, said at least one slot slidably receiving a guide pin that extends from the other of said members.