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:
Apr. 20, 2004
Filed:
Sep. 18, 2001
Norihiro Yamada, Aichi-ken, JP;
Tatsuo Suzuki, Aichi-ken, JP;
Keiji Miyoshi, Aichi-ken, JP;
Yoshiki Shimoda, Aichi-ken, JP;
Toyo Tire & Rubber Co., Ltd., Osaka, JP;
Abstract
There is provided a liquid filled type vibration isolator in which damping action for both engine idling vibration and engine shake is carried out with the use of a single orifice. In the liquid filled type vibration isolator comprising a rubber-like insulator for absorbing and isolating vibration transmitted from an oscillating body, a main chamber having a chamber wall formed by a part of the insulator, and hermetically charged therein with liquid, an auxiliary chamber connected to the main chamber through the intermediary of an orifice and having a chamber wall a part of which is formed by a first diaphragm, a partition member partitioning between the main chamber and the auxiliary chamber, a working chamber defined and formed with respect to the main chamber by means of a second diaphragm, wherein the second diaphragm has a deforming stiffness which is higher than that of the first diaphragm. The liquid in the orifice effects resonant oscillation with a vibration input during engine idling operation.