Title:
PISTON RING
Document Type and Number:
WIPO Patent Application WO/2023/162370
Kind Code:
A1
Abstract:
The outer peripheral surface of this piston ring has a cut surface that forms a cutout between the outer peripheral end and the lower surface. The cut surface includes a first surface provided between the outer peripheral end surface and the bottom, and a second surface provided between the bottom and the lower surface. The second surface is inclined away from the center axis of the piston ring with approach towards a crank chamber, and the inclination angle of the second surface with respect to the lower surface falls within the range of 50-85°. 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 distance in the axial direction between the connection portion between the cut surface and the outer peripheral end surface and the connection portion between the cut surface and the lower surface.
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Inventors:
ABE YUSHI (JP)
UMEDA NAOKI (JP)
OHIRA MASAYUKI (JP)
HIKONE AKIRA (JP)
UMEDA NAOKI (JP)
OHIRA MASAYUKI (JP)
HIKONE AKIRA (JP)
Application Number:
PCT/JP2022/042600
Publication Date:
August 31, 2023
Filing Date:
November 16, 2022
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F02F5/00; F16J9/20
Domestic Patent References:
| WO2016121483A1 | 2016-08-04 | |||
| WO2020095807A1 | 2020-05-14 |
Foreign References:
| JPH06265020A | 1994-09-20 | |||
| JP2003113940A | 2003-04-18 | |||
| JPS49123403U | 1974-10-23 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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