Title:
COMBINATION OF PISTON RINGS AND COMBINED STRUCTURE OF PISTONS AND PISTON RINGS
Document Type and Number:
WIPO Patent Application WO/2023/007735
Kind Code:
A1
Abstract:
This combination of piston rings assembled on pistons includes a 1st compression ring, a 2nd compression ring, a 3rd compression ring, and an oil ring. Letting h1(1) be the axial width of the first compression ring, h1(2) be the axial width of the second compression ring, h1(3) be the axial width of the third compression ring, and h1(4) be the axial width of the oil ring, h1(1) ≥ h1(2) and h1(1) ≥ h1(3), and when h1(TOTAL) = h1(1)+h1(2)+h1(3)+h1(4), h1(TOTAL) ≥ 3.9 mm.
Inventors:
NAGAKURA HIROYUKI (JP)
INAMORI SHUICHI (JP)
HIKONE AKIRA (JP)
INAMORI SHUICHI (JP)
HIKONE AKIRA (JP)
Application Number:
PCT/JP2021/028467
Publication Date:
February 02, 2023
Filing Date:
July 30, 2021
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F16J9/00; F16J9/06; F16J9/12; F16J9/20
Foreign References:
| CN106402381A | 2017-02-15 | |||
| CN206054123U | 2017-03-29 | |||
| JPS6263460U | 1987-04-20 | |||
| JPH0525024A | 1993-02-02 |
Other References:
See also references of EP 4206497A4
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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