Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Toru Aoki0
Naozumi Arimoto0
Shinichi Shirahama0
Date of Patent
July 20, 2010
0Patent Application Number
112821910
Date Filed
November 18, 2005
0Patent Primary Examiner
Patent abstract
Hydraulic oil compositions for shock absorbers comprises a lubricating base oil and at least one type of silicone oil selected from the group consisting of silicone oils with a kinematic viscosity at 25° C. of 10,000 to 350,000 mm2/s and fluorine-modified silicone oils with a kinematic viscosity at 25° C. of less than 10,000 mm2/s. The compositions may further comprise a viscosity index improver. The compositions can enhance the damping force and initial damping properties of a shock absorber and thus improve the ride comfort of an automobile equipped with such a shock absorber.
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