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. 22, 2019
Filed:
Oct. 21, 2016
Tpr Co., Ltd., Tokyo, JP;
Hitoshi Yamaguchi, Tokyo, JP;
Teppei Oga, Tokyo, JP;
TPR CO., LTD., Tokyo, JP;
Abstract
Provided is a seal ring causing less friction and having a low oil leakage property even under a state in which a shaft rotation frequency or a housing rotation frequency is high, and being capable of reducing a shaft rotation torque. A level difference portion that forms a second width smaller than a first width is formed on a longitudinal sectional shape of the seal ring as viewed in a circumferential direction from a seal ring outer peripheral surface side toward a seal ring inner peripheral surface side. The level difference portion is formed so that a center line of the second width in the circumferential direction of the seal ring in which a sealed fluid flows draws a trajectory of extending along the circumferential direction and shifting from an abutment joint end surface on an inner periphery side of a seal ring abutment joint portion at one end toward an abutment joint end surface on the inner periphery side of the seal ring abutment joint portion at another end so as to be closer to the seal ring contact surface.