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:
Oct. 03, 2017
Filed:
Nov. 13, 2014
Nok Corporation, Tokyo, JP;
Hiroaki Monma, Ibaraki, JP;
NOK Corporation, Tokyo, JP;
Abstract
An object is to provide a backup ring manufacturable with an angle of a cut portion set to a standard cut angle even in the case of a product having a small diameter etc. due to dimensional limitation of a device used therewith, and is solved by a sealing device characterized in that a backup ringis disposed in an annular gapformed by disposing a sloped surfaceon a member surface of one of two members, i.e., a shaftand a housinghaving a shaft hole in which the shaftis inserted, with a distance from a counterpart member gradually reduced from a high pressure side toward a low pressure side, that the backup ringis in contract with the sloped surfaceon the low pressure side relative to a mounted seal membermade of an annular elastic member, that the backup ringhas an axially extending cylindrical portionand a projecting portioncontinuously disposed on an end portion of the cylindrical portionon the high pressure side and formed to annularly project in a radial direction from the end portion toward the sloped surface, and that the projecting portionhas a radial tip surface made up of a taper surfacefacing the sloped surface