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:
Sep. 17, 2002
Filed:
Jul. 30, 1999
Yamashita Rubber Kabushiki Kaisha, Saitama, JP;
Abstract
An outer peripheral portion of an elastic member is formed integrally to a periphery of an inner cylinder that is unconnected and intimately contacted to an inside of the outer cylinder. A partition wall is formed between a main liquid chamber and an auxiliary liquid chamber which are communicated with an orifice passage, and end walls are formed at both ends in an axial direction, whereby they are respectively adjusted to resonate by membrane in medium to high frequency range. Cooperative resonance frequency of the partition wall with the end walls are set in the medium to high frequency range. In the main liquid chamber, a stopper is projected integrally from a main liquid chamber cover which is provided along an interior face of the outer cylinder and liquid column resonance is generated respectively between the partition wall and the end walls. An outer peripheral face of the inner cylinder is formed in a shape having a non-circular cross-section and a resin-made thick wall cover is integrated on a periphery thereof.