Title:
PISTON RING
Document Type and Number:
WIPO Patent Application WO/2022/118988
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a piston ring that has, on an outer circumferential surface of a base material thereof, a wear-resistant layer formed of a wear-resistant material and that allows the wear status of the wear-resistant layer to be easily determined from the external appearance thereof. This piston ring has a sliding surface 3 including a laminate of a wear-resistant layer 2a of a wear-resistant material and an affinity layer 2b that are formed flush with each other on an outer circumferential surface of a base material 1. The outer circumferential surface of the base material 1 is provided with a wear determination member 4 formed of a different material from the base material 1. Preferably, an outermost portion of the wear determination member 4 is flush with the sliding surface 3.
Inventors:
KAMEYAMA KEIGO (JP)
ONO SHUHEI (JP)
ISHIDA YUICHI (JP)
MORITA TAKAHIRO (JP)
MURAYAMA DAIKI (JP)
ONO SHUHEI (JP)
ISHIDA YUICHI (JP)
MORITA TAKAHIRO (JP)
MURAYAMA DAIKI (JP)
Application Number:
PCT/JP2021/044800
Publication Date:
June 09, 2022
Filing Date:
December 06, 2021
Export Citation:
Assignee:
MITSUI E & S MACH CO LTD (JP)
International Classes:
F02F5/00; F16J9/12; F16J9/26
Foreign References:
| JPS61187608A | 1986-08-21 | |||
| JP2001027152A | 2001-01-30 | |||
| JPH02150574A | 1990-06-08 | |||
| JPH1151187A | 1999-02-23 | |||
| JP2016517937A | 2016-06-20 |
Attorney, Agent or Firm:
MARUYAMA Eiichi et al. (JP)
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