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Title:
COMBINATION OF PISTON RINGS AND COMBINED STRUCTURE OF PISTON AND PISTON RINGS
Document Type and Number:
WIPO Patent Application WO/2023/007734
Kind Code:
A1
Abstract:
The combination of piston rings assembled to a piston comprises a first compression ring, a second compression ring, a third compression ring, and an oil ring. When the first compression ring has an axial width of h1(1), the second compression ring has an axial width of h1(2), the third compression ring has an axial width of h1(3), and the oil ring has an axial width of h1(4), h1(1)≥h1(2) and h1(1)≥h1(3) are established. When h1(TOTAL)=h1(1)+h1(2)+h1(3)+h1(4), h1(TOTAL)≥3.1 mm is established.

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Inventors:
NAGAKURA HIROYUKI (JP)
INAMORI SHUICHI (JP)
HIKONE AKIRA (JP)
Application Number:
PCT/JP2021/028466
Publication Date:
February 02, 2023
Filing Date:
July 30, 2021
Export Citation:
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Assignee:
TPR CO LTD (JP)
International Classes:
F16J9/12
Foreign References:
CN106402381A2017-02-15
CN206054123U2017-03-29
JPS6263460U1987-04-20
JPH0525024A1993-02-02
Other References:
See also references of EP 4206498A4
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
Download PDF:
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