The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1999
Filed:
Oct. 22, 1996
Applicant:
Inventors:
Tsuyoshi Hirayanagi, Shizuoka, JP;
Shigeki Umezawa, Shizuoka, JP;
Assignee:
NSK-Warner Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16H / ; F16D / ;
U.S. Cl.
CPC ...
192-329 ; 1921133 ;
Abstract
The invention includes a decompression board 35 bonded on a piston 1, and bonds a friction member 40 on a surface of the decompression board, wherein an oil groove is formed on the decompression board.