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:
Nov. 02, 2004
Filed:
Oct. 03, 2002
Applicant:
Inventors:
Hiroshi Hashimoto, Osaka, JP;
Yoshio Kurokawa, Osaka, JP;
Tsutomu Namie, Osaka, JP;
Nobuyuki Fujimoto, Osaka, JP;
Assignee:
Tsubakimoto Chain Co., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 7/08 ; F16K 1/704 ;
U.S. Cl.
CPC ...
F16H 7/08 ; F16K 1/704 ;
Abstract
In a hydraulic tensioner having a relief valve mechanism in which a spring-biased valve element is reciprocable in a bore, hitting sounds produced by collision of the relief valve element with a plug in the bore, and wear and breakage of the biasing spring, are prevented by providing an oil relief hole in a peripheral wall of the relief valve bore at a position where it is closed by the relief valve element when he relief valve element is moved by a rapid increase in oil pressure.