Title:
OIL RING
Document Type and Number:
WIPO Patent Application WO/2023/013265
Kind Code:
A1
Abstract:
This oil ring comprises a pair of segments that are annularly formed so as to follow the circumferential direction of the oil ring and that are arranged independently of each other in the axial direction of the oil ring, and a spacer expander disposed between the pair of segments. A surface treatment film is formed, on at least part of at least one of at least one axial end surface of at least one of the pair of segments, such that the surface colors of the pair of segments are different from each other.
Inventors:
KAWANO KENTARO (JP)
SHIMIZU RYOYA (JP)
SHIMIZU RYOYA (JP)
Application Number:
PCT/JP2022/024542
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
Domestic Patent References:
| WO2019069748A1 | 2019-04-11 | |||
| WO2018198173A1 | 2018-11-01 |
Foreign References:
| JP2006153198A | 2006-06-15 | |||
| JP2008232312A | 2008-10-02 | |||
| JPH0544575A | 1993-02-23 | |||
| JP2003254155A | 2003-09-10 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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