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. 08, 2014
Filed:
Jun. 19, 2008
Hirokazu Kadowaki, Fujimino, JP;
Kazutoshi Satori, Fujimino, JP;
Hirokazu Kadowaki, Fujimino, JP;
Kazutoshi Satori, Fujimino, JP;
Yamashita Rubber Kabushiki Kaisha, Fujimino-Shi, JP;
Abstract
A liquid sealed vibration isolating device has first and second mounting members and an insulator placed between the mounting members. A partition member partitions a liquid chamber into primary and secondary liquid chambers. A valve portion provided on a diaphragm enclosing the secondary liquid chamber opens and closes a port of a passage between the liquid chambers. The valve portion has an annular thick wall portion which contacts a valve seat portion provided around the port and a movable elastic diaphragm portion provided on an inside of the wall portion and is thinner than the wall portion so as to be elastically deformable by a pressure of the hydraulic liquid. The hydraulic liquid passing through the passage causes orifice resonance when the passage is opened by the valve portion. The diaphragm, including the valve portion, membrane-resonates at a frequency in the vicinity of a resonance frequency of the orifice resonance.