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Patent Searching and Data


Title:
SHOCK ABSORBER
Document Type and Number:
WIPO Patent Application WO/2013/081004
Kind Code:
A1
Abstract:
This shock absorber is equipped with first passages (111, 112) and second passages (32, 99, 235), which communicate such that an operating fluid runs between two chambers (16, 17) in response to the movement of a piston (15). In addition, passage area adjustment mechanisms (101, 236), which adjust the passage area of the second passages (99, 235) by means of the position of a piston rod (18), are provided so as to achieve a maximum length characteristic wherein the extension-side damping force is soft and the compression-side damping force is hard when the piston rod (18) is in a range where it is extended more to the outside of a cylinder (11) than a prescribed maximum length position, and/or so as to achieve a minimum length characteristic wherein the extension-side damping force is hard and the compression-side damping force is soft when the piston rod (18) is in a range where it is inserted more to the interior of the cylinder (11) than a prescribed minimum length position.

Inventors:
YAMASHITA MIKIO (JP)
YAMAOKA FUMIYUKI (JP)
KOUYAMA MASARU (JP)
TAKIGUCHI KUNIO (JP)
ISHIMOTO ATSUFUMI (JP)
Application Number:
PCT/JP2012/080739
Publication Date:
June 06, 2013
Filing Date:
November 28, 2012
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F16F9/49; F16F9/342
Foreign References:
JPH05238227A1993-09-17
JPH0342319A1991-02-22
JPS62123042U1987-08-05
Attorney, Agent or Firm:
SHIGA Masatake (JP)
Masatake Shiga (JP)
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Claims: