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:
Jun. 08, 2021
Filed:
Oct. 05, 2016
Kabushiki Kaisha Riken, Tokyo, JP;
Namsun Park, Kashiwazaki, JP;
KABUSHIKI KAISHA RIKEN, Tokyo, JP;
Abstract
[Object] To provide a seal ring capable of both reducing a friction loss and reducing oil leakage. [Solving Means] A seal ring includes: an inner circumferential surface; an outer circumferential surface orthogonal to the inner circumferential surface; side surfaces orthogonal to the inner circumferential surface and the outer circumferential surface; and a plurality of pockets provided, spaced apart from one another in one of the side surfaces. The plurality of pockets each have a symmetrical shape in a circumferential direction and are opened on a side of the inner circumferential surface and closed on a side of the outer circumferential surface. The plurality of pockets each include circumferential end portions that are provided in end portions in the circumferential direction and are R-surfaces each having a convex shape connected to the side surface, a bottom portion provided in a central region in the circumferential direction, and inclined portions each extending between each of the circumferential end portions and the bottom portion. The inclined portions each include at least one ridge portion, a first inclined portion extending between the bottom portion and the ridge portion and forming a first angle with respect to the side surface, and a second inclined portion extending between the circumferential end portion and the ridge portion and forming a second angle smaller than the first angle with respect to the side surface.