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:
Jul. 23, 2013
Filed:
Nov. 30, 2007
Jun Saito, Fujimino, JP;
Masatomo Nishizaka, Fujimino, JP;
Nobuo Kubo, Wako, JP;
Hiroshi Yanagase, Wako, JP;
Jun Saito, Fujimino, JP;
Masatomo Nishizaka, Fujimino, JP;
Nobuo Kubo, Wako, JP;
Hiroshi Yanagase, Wako, JP;
Yamashita Rubber Kabushiki Kaisha, Fujimino-Shi, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
To form a relief valve for preventing the generation of the cavitation phenomenon into a simple and accurately operable structure, there are provided a central thin wall portion and a fixing portion in an elastic diaphragm provided in the partition member to have the fixing portion fixed in position. A relief valve is integrally formed with an outer peripheral portion of the fixing portion. The relief valve is provided with an inclined surface formed on the side of a secondary liquid chamber and a recessed portion opened on the side of a primary liquid chamber and has a difference in rigidity in the circumferential direction. When the primary liquid chamber turns negative pressure, a hydraulic liquid in the secondary liquid chamber opens the relief valve and leaks to the primary liquid chamber so as to prevent the generation of the cavitation phenomenon.