Invention Grant
- Patent Title: Combined oil control ring
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Application No.: US14404586Application Date: 2013-05-27
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Publication No.: US09657838B2Publication Date: 2017-05-23
- Inventor: Yoshihito Ooya
- Applicant: KABUSHIKI KAISHA RIKEN
- Applicant Address: JP Tokyo
- Assignee: KABUSHIKI KAISHA RIKEN
- Current Assignee: KABUSHIKI KAISHA RIKEN
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2012-120628 20120528
- International Application: PCT/JP2013/064653 WO 20130527
- International Announcement: WO2013/180065 WO 20131205
- Main IPC: F16J9/06
- IPC: F16J9/06 ; F16J9/12 ; F16J9/20

Abstract:
A combined oil control ring for automobile engines capable of keeping an excellent oil-controlling function without suffering sticking between a spacer expander and side rails for a long period of operation comprises upper and lower two side rails, and an axially corrugated spacer expander having upper and lower portions; a leg portion connecting each upper portion and each lower portion of the spacer expander having a portion having an inclination angle θ of 15° or more from the axial direction.
Public/Granted literature
- US20150145218A1 COMBINED OIL CONTROL RING Public/Granted day:2015-05-28
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