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:
Oct. 17, 2000
Filed:
Aug. 10, 1998
Kazutoshi Satori, Saitama, JP;
Osamu Ninakawa, Saitama, JP;
Yamashita Rubber Kabushiki Kaisha, Saitama, JP;
Abstract
A liquid chamber is arranged with a first support member (1), a second support member (2) and an elastic member (3), an inside of the liquid chamber is divided to a main liquid chamber (11) and an auxiliary liquid chamber (12) by a partition member (10) and both chambers are communicated with an orifice passage (14). On an inner face of a conical portion (4) of the elastic member (3), thin wall portions (7) are provided by forming recess portions (6) at axis symmetrical positions so as to yield a minimum value for a dynamic spring characteristic against a vibration input in a designated medium frequency by a membrane resonance and a medium to high frequency device (17) projecting into the main liquid chamber (11) is provided to the first support member (1) so as to yield a minimum value for the dynamic spring characteristic against a vibration input in a designated high frequency. Furthermore, it is possible that the thin wall portion (7) is adapted to be asymmetric, the medium to high frequency device (17) is arranged to be non-circular, an elastically deforming wall is used for the fixed partition wall and the elastic control mechanism is provided to switch a plurality of the orifice passages at any time.