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:
Dec. 05, 2023
Filed:
Apr. 15, 2020
Nok Corporation, Tokyo, JP;
Toshiki Watanabe, Fukushima, JP;
Kokichi Hamamoto, Fukushima, JP;
Tomoaki Nishimura, Fukushima, JP;
Masayuki Tanida, Fukushima, JP;
NOK CORPORATION, Tokyo, JP;
Abstract
A sealing device capable of suppressing depletion of lubricant is provided. A sliding surface of a side lipat a position away from a distal end of the side lipis provided with a plurality of annular groovesadjacent each other, each of all parts that form annular protrusionsbetween adjacent annular groovesprotrudes most at a center in a width direction thereof, with an amount of protrusion gradually decreasing with increasing separation from the center, and both sides of the center in the width direction are symmetric in shape. A tip portion of the sliding surface of the side lipon the distal side of a region, which is provided with the plurality of annular grooves, is configured to make a planar contact with an end face of the annular member.