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:
Mar. 13, 2012
Filed:
Jul. 24, 2007
Mutsumi Muraoka, Nagakute-tyo, JP;
Mutsumi Muraoka, Nagakute-tyo, JP;
Tokai Rubber Industries, Ltd., Komaki-shi, JP;
Abstract
A fluid filled type vibration damping device wherein an elastic rubber film is disposed to partially define a primary fluid chamber disposed on one side thereof, and a pressure operating chamber is disposed on an opposite side from the primary fluid chamber with the elastic rubber film interposed therebetween. The elastic rubber film has a dome shape and an attraction face of the pressure operating chamber has an inverted dome shape, and has a negative pressure suction groove including an outer circumferential groove extending in a circumferential direction at an outer peripheral portion of the attraction face and opening to the pressure operating chamber, and a negative pressure suction bore for introducing a negative pressure to the pressure operating chamber is connected to the negative pressure suction groove.