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:
Nov. 09, 2010
Filed:
Sep. 21, 2006
Shinobu Munekata, Fukushima, JP;
Shinobu Munekata, Fukushima, JP;
NOK Corporation, Tokyo, JP;
Abstract
To stabilize frictional force to the reciprocating shaft without affecting sealing ability, a sealing device for a reciprocating shaft comprises a main lip, a whole periphery of which slidably and tightly contacts with an outer peripheral surface of a shaftreciprocating in the axial direction; and a frictional lip, which extends to the sealed space A side from the main lipand slidably and tightly contacts with the outer peripheral surface of the shaftin the state of permitting circulation of sealed fluid, whereby the frictional force of the frictional lipis not varied by pressure of the sealed fluid, while frictional force of the main lipto the shaftis varied by the pressure, the sliding surface is lubricated with the sealed fluid, and reduction of the frictional force by abrasion can be controlled.