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. 20, 2012
Filed:
Apr. 09, 2008
Toshiyuki Maeda, Nihonmatsu, JP;
Yoshiyuki Abe, Nihonmatsu, JP;
Toshiyuki Maeda, Nihonmatsu, JP;
Yoshiyuki Abe, Nihonmatsu, JP;
NOK Corporation, Tokyo, JP;
Abstract
A sealing device in which a good lubricating oil film is formed along the entire circumference of a sliding surface. The sealing device () is fitted in an annular groove formed in either of two elements that are a housing having a shaft hole and a shaft inserted through the shaft hole, and the sealing device () seals an annular gap between the two elements. The sealing device () has a seal ring () sliding against the other element by relative axial movements of the two elements. In the seal ring (), on each of axially opposite ends of a sliding surface () sliding against the other element, there are formed grooves () extending from an end surface () of the seal ring () toward the axial center of a sliding surface (). Further, in the seal ring (), the boundary between each groove () and the sliding surface () is formed only by lines inclined relative to the direction of sliding of the sliding surface (), and grooves () are circumferentially adjacently arranged in the seal ring () so that regions each having the boundary formed by the inclined lines are continuous along the entire circumference of the sliding surface ().