Title:
OIL RING
Document Type and Number:
WIPO Patent Application WO/2023/013264
Kind Code:
A1
Abstract:
An oil ring according to the present invention includes: a pair of segments that are formed following a perimeter direction of the oil ring and that are provided arrayed in the axial direction of the oil ring, independent from each other, with an annular wire rod as a base material of each; and a space expander that is disposed between the pair of segments. Of the pair of segments, the base material of an upper-side segment that is situated on a combustion chamber side in an internal combustion engine has higher wear resistance than the base material of a lower-side segment of the pair of segments that is situated on a crank chamber side in the internal combustion engine.
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Inventors:
KAWANO KENTARO (JP)
SHIMIZU RYOYA (JP)
SHIMIZU RYOYA (JP)
Application Number:
PCT/JP2022/024541
Publication Date:
February 09, 2023
Filing Date:
June 20, 2022
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F16J9/06; F02F5/00; F16J9/26
Foreign References:
| JP2019124288A | 2019-07-25 | |||
| JPS62294152A | 1987-12-21 | |||
| JPH11101189A | 1999-04-13 | |||
| JP2020026805A | 2020-02-20 | |||
| JPH0464656U | 1992-06-03 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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