Title:
COMBINATION OIL RING
Document Type and Number:
WIPO Patent Application WO/2019/142380
Kind Code:
A1
Abstract:
The purpose of the present invention is to improve seal performance and reduce oil consumption. According to the present invention, in a state in which a combination oil ring is mounted in an oil ring groove and yet to be inserted into a cylinder bore, an inclined surface of an upper-ear part of an expander/spacer is abutted against an inner-peripheral surface of an upper segment, and in a state in which an inclined surface of a lower-ear part of the expander/spacer is abutted against an inner-peripheral surface of a lower segment, an upper protruding amount P1 from an outer peripheral-side end surface of the expander/spacer to an outer peripheral-surface apex of the upper segment is greater than a lower protruding amount P2 from the outer peripheral-side end surface of the expander/spacer to an outer peripheral-surface apex of the lower segment. Consequently, when the combination oil ring is inserted into the cylinder bore, it becomes possible to improve seal performance and reduce oil consumption.
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Inventors:
HOSHINO SEEROKU (JP)
OSADA HIROFUMI (JP)
TAMAKI SEIJI (JP)
OSADA HIROFUMI (JP)
TAMAKI SEIJI (JP)
Application Number:
PCT/JP2018/028457
Publication Date:
July 25, 2019
Filing Date:
July 30, 2018
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F16J9/06; F02F5/00
Foreign References:
| JP6251850B1 | 2017-12-20 | |||
| JP2016118276A | 2016-06-30 | |||
| JPH0326294Y2 | 1991-06-06 | |||
| JPH08261325A | 1996-10-11 | |||
| JPH06174094A | 1994-06-21 | |||
| JPH0517267U | 1993-03-05 |
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (JP)
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