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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/061222
Kind Code:
The purpose of the present invention is to provide a seal ring that has low friction and low oil leakage and is capable of reducing shaft rotation torque even in states of high shaft rotation speed or housing rotation speed. In the shape of vertical cross-sections of the seal ring in the circumferential direction, a level difference part, which forms second widths a21 and a211 that are smaller than a first width a1, is formed from the seal ring outer circumferential surface 13-side to the seal ring inner circumferential surface 12-side. The level difference part is formed so that, in the seal ring circumferential direction of sealed fluid inflow, the center line M2 of the second width traces a path that moves along the circumferential direction toward the seal ring contact surface 14-side from the abutment end face on the inner circumferential side of a seal ring abutment part at one end to the abutment end face on the inner circumferential side of a seal ring abutment part at the other end.

YAMAGUCHI, Hitoshi (6-2, Marunouchi 1-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
OGA, Teppei (6-2, Marunouchi 1-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
Application Number:
Publication Date:
April 05, 2018
Filing Date:
October 21, 2016
Export Citation:
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TPR CO., LTD. (6-2 Marunouchi 1-chome, Chiyoda-ku Tokyo, 05, 〒1000005, JP)
International Classes:
Domestic Patent References:
Foreign References:
Other References:
See also references of EP 3327321A4
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (7th Floor, HULIC Nakano Bldg. 44-18 Honcho 4-chom, Nakano-ku Tokyo 12, 〒1640012, JP)
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