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Patent Searching and Data


Title:
SHOCK ABSORBER
Document Type and Number:
WIPO Patent Application WO/2018/025456
Kind Code:
A1
Abstract:
This shock absorber has a piston rod, an inner cylinder into which the piston rod is inserted, an electrorheological fluid provided between the piston rod and the inner cylinder, and a voltage application mechanism for applying a voltage to the electrorheological fluid, wherein the electrorheological fluid of the shock absorber has a base oil and temperature-expandable particles having an average linear expansion coefficient of 1.4 × 10-4/°C or higher so that the value of temperature dependence, represented by (viscosity of electrorheological fluid at -30°C/viscosity of electrorheological fluid at 23°C) × 100, is 300% or lower.

Inventors:
ISHII, Satoshi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
OOTA, Ryou (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
NAKANO, Hiroshi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
KATAYAMA, Shigeo (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
TSUJIMI, Yoshie (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2017/016201
Publication Date:
February 08, 2018
Filing Date:
April 24, 2017
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
C10M171/00; C10M101/02; C10M107/50; C10M125/10; C10M125/26; C10M143/02; C10M145/14; C10M145/22; C10M147/00; C10M149/14; C10M155/02; F16F9/53; C10N10/06; C10N10/08; C10N20/00; C10N30/00; C10N40/06; C10N40/14
Foreign References:
JPH03139598A1991-06-13
JPH07503275A1995-04-06
Attorney, Agent or Firm:
SUNNEXT INTERNATIONAL PATENT OFFICE (Seafort Square Center Building, 16F 2-3-12, Higashishinagawa, Shinagawa-k, Tokyo 02, 〒1400002, JP)
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