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. 23, 2019
Filed:
Jan. 06, 2016
Nok Corporation, Tokyo, JP;
NOK Corporation, , JP;
Abstract
The invention provides a sealing device which can suppress occurrence of static leakage and has a seal lip and a seal flange which are slidably in contact with each other, and a screw groove arranged in an end face, in an axial direction, of the seal flange. In the sealing device, the seal lip attached to a non-rotational housing side is slidably in contact with the end face, in the axial direction, of the seal flange on the rotational axis side, and which has the screw groove arranged in the end face, in the axial direction, of the seal flange so as to exert a fluid pumping action during rotation, is characterized in that the screw groove has an inner-circumferential-side inclined surface and an outer-circumferential-side inclined surface as the internal surfaces, and has a groove bottom part in a circular arc cross-sectional shape that interconnects both of the inclined surfaces.