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:
Jan. 09, 2001
Filed:
Aug. 11, 1998
Kazutoshi Satori, Saitama, JP;
Toru Sakamoto, Saitama, JP;
Yamashita Rubber Kabushiki Kaisha, Saitama, JP;
Abstract
A liquid sealed type bushing including an outer cylinder, an inner cylinder and an elastic member. Recesses are formed on a middle portion of the elastic member. The elastic member between the recesses is adapted to be a partition member and a thin wall portion is formed by providing a through hole in the partition member, and an outer peripheral portion of the partition member is made to contact but not combine with an inner face of the outer cylinder. Within the recess, a medium to high frequency device is supported by the inner cylinder. By overlapping a peak caused by a membrane resonance owing to the thin wall portion of the partition member, and a minimum value caused by a liquid column resonance of the medium to high frequency device, a low dynamic spring constant is attained in a medium to high frequency region.