Title:
PISTON RING
Document Type and Number:
WIPO Patent Application WO/2023/162369
Kind Code:
A1
Abstract:
The outer peripheral surface of this piston ring has a cut surface that is provided so as to form a cutout between the outer peripheral end and the lower surface. The cut surface includes a curved concave surface. The angle of inclination of the tangent line of the curved concave surface at the point closest to the combustion chamber on the curved concave surface with respect to a first imaginary line extending parallel to the lower surface falls within the range of 5-50°. H/h1 falls within the range of 0.2-0.4, where h1 is defined as the axial width of the piston ring and H is defined as the axial width of the cut surface.
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Inventors:
MINEMURA SATOSHI (JP)
KOSAKA KENICHIRO (JP)
ABE YUSHI (JP)
KOSAKA KENICHIRO (JP)
ABE YUSHI (JP)
Application Number:
PCT/JP2022/042599
Publication Date:
August 31, 2023
Filing Date:
November 16, 2022
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F16J9/20; F02F5/00
Domestic Patent References:
| WO2011064888A1 | 2011-06-03 | |||
| WO2016121483A1 | 2016-08-04 |
Foreign References:
| JP2003113940A | 2003-04-18 | |||
| JP2020204349A | 2020-12-24 | |||
| JP2020193666A | 2020-12-03 | |||
| JP2010530045A | 2010-09-02 | |||
| JP2003113940A | 2003-04-18 | |||
| JP2020193666A | 2020-12-03 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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