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. 12, 2011
Filed:
Apr. 03, 2008
Kiichiro Goto, Fukushima, JP;
Kiichiro Goto, Fukushima, JP;
NOK Corporation, , JP;
Abstract
To prevent effects of small amplitude oscillations caused by pressure fluctuation, eccentric attachment of a cancel plate and biased load application of a return spring, and to achieve a long service life of the inner peripheral seal portion, a BPS () with a piston member () moving in an axial direction inside a cylinder () and defining a compression chamber (M) together with the cylinder () and a cancel plate () opposing to a bottom portion () of the cylinder () beyond the piston member () is provided with an inner peripheral seal portion () with a seal lip () slidably contacting an inner peripheral tube portion () of the cylinder () and a fitting portion () fitted to the inner peripheral tube portion () in an inner peripheral end portion () of the cancel plate ().