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:
Mar. 20, 2012
Filed:
Jan. 26, 2009
Osamu Emizu, Wako, JP;
Hiroshi Yamaura, Wako, JP;
Ryuta Niimura, Wako, JP;
Yasuhiro Fukuyoshi, Wako, JP;
Takao Kudo, Wako, JP;
Osamu Emizu, Wako, JP;
Hiroshi Yamaura, Wako, JP;
Ryuta Niimura, Wako, JP;
Yasuhiro Fukuyoshi, Wako, JP;
Takao Kudo, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A tensioner for an endless transmission belt includes a plunger body. A plunger is movably provided in a hole of the plunger body to press the belt. A chamber is provided between the plunger and the plunger body to store hydraulic oil. An oil supply passage is provided in the plunger body to supply the oil from an oil pump to the chamber. A check valve is provided between the chamber and the passage and configured to allow the oil to be supplied from the pump to the chamber while the check valve is configured to be closed when a pressure in the chamber is higher than a pressure of the oil supplied by the pump. A relief valve is provided between the chamber and the passage and configured to discharge the oil in the chamber to the passage when the pressure in the chamber exceeds a first predetermined value.