Patent ID: 6513822
Filing Date: 2003-02-04
Classification: B62K

Abstract:
A wheel suspension front fork comprising:a supporting pipe attached at an upper end to a steering pipe; a slide pipe which is slidably fitted to said supporting pipe, said slide pipe having an attaching portion for attaching a wheel bearing at a lower portion thereof; a cap for detachably closing an opening at said upper end of said supporting pipe and an exchangeable hydraulic suspension unit which is arranged in said supporting pipe, wherein said hydraulic suspension unit comprises: a cylinder in which oil and air are sealed, said cylinder being exchangeably arranged in said supporting pipe through said opening and in which oil is filled; a piston which is movably arranged in said cylinder and has an oil passage; a piston rod in which one end is attached to said piston and the other end is projected from said cylinder and detachably coupled with said slide pipe; spring means arranged upon said piston and which has the function for buffering a shock force which is transferred from said slide pipe through said piston; and a movable closing member for sealing said cylinder and causing said spring means to expand or contract, and which is movably arranged upon said spring means and contacts said cap, wherein said cap comprises a linearly movable pressing portion to move said movable closing member.