TELESCOPIC FORK LEG FOR VEHICLE, PREFERABLY MOTORCYCLE

摘要

PROBLEM TO BE SOLVED: To realize leak flow function required at low speed in both directions of compression/expansion-contraction without outstandingly varying with a conventional constitution element while affecting to the other direction in a telescopic fork device. SOLUTION: An attenuation device provided on a telescopic fork leg includes a cylindrical unit coaxially arranged. A piston belonging to a first outer cylinder part is operated in a chamber in the cylindrical unit and an internal medium is passed and moved through a passage on or near an attenuation action member between an apex side an a bottom side of the piston at a piston speed exceeding a selected value. The passage is closed by the attenuation action member at the piston speed falling below the value. The medium is passed and only transmitted through one or more leak flow route returned from one side chamber of the piston to the other side chamber through a gap between an outer side of the internal cylindrical unit and a second cylindrical unit arranged at the outside of the internal unit and one or more leak flow size determination member. COPYRIGHT: (C)2006,JPO&NCIPI