Invention Grant
- Patent Title: Oil control ring and spacer expander
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Application No.: US17045181Application Date: 2019-03-29
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Publication No.: US11333245B2Publication Date: 2022-05-17
- Inventor: Hiroshi Shimizu , Satoshi Koizumi , Kenichi Sudou , Shigeru Tokunaga , Yuichiro Takezawa
- Applicant: KABUSHIKI KAISHA RIKEN
- Applicant Address: JP Tokyo
- Assignee: KABUSHIKI KAISHA RIKEN
- Current Assignee: KABUSHIKI KAISHA RIKEN
- Current Assignee Address: JP Tokyo
- Agency: Soei Patent & Law Firm
- Priority: JPJP2018-073679 20180406
- International Application: PCT/JP2019/014225 WO 20190329
- International Announcement: WO2019/194104 WO 20191010
- Main IPC: F16J9/06
- IPC: F16J9/06 ; F16J9/12

Abstract:
An oil control ring according the present disclosure includes a pair of side rails, and a spacer expander disposed between the pair of side rails. The spacer expander includes a plurality of sets and each set includes a lug part and a rail facing part. For each set, the lug part is in contact with an inner circumferential surface of either of the pair of the side rails, and the rail facing part is provided adjacent to the lug part and faces a side surface of either of the pair of the side rails. The lug part satisfies a following condition (1): W/H≥1.5 (1) In condition (1), W indicates a width of the lug part at a position 0.05 mm away from a highest position of the lug part in a direction towards the rail facing part, and H indicates a height difference between a highest position of a region on the rail facing part adjacent to the lug part and the highest position of the lug part.
Public/Granted literature
- US20210164566A1 SPACER EXPANDER AND OIL CONTROL RING INCLUDING SAME Public/Granted day:2021-06-03
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