Title:
PISTON
Document Type and Number:
Japanese Patent JP3243473
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress the increase of oil consumption of a piston using a piston ring made of a resin formed in an endless manner without providing a joint, part.
SOLUTION: In a piston with a piston ring structure mounted in a ring groove formed, a second ring 200 presses an outer ring 210 formed of polyimide endlessly without forming a joint part to a cylinder wall 2 through an inner ring 220 formed of PTFE endlessly without forming a joint part by a coil expander 230. A stepped part 31 is formed in a third land 30 below the second ring 200 and an oil releasing hole 32 communicated with the stepped part 31 and the inner wall of a piston is formed.
Inventors:
Teruo Kumai
Michio Okamoto
Michio Okamoto
Application Number:
JP3924298A
Publication Date:
January 07, 2002
Filing Date:
February 20, 1998
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
Teikoku Piston Ring Co., Ltd.
Teikoku Piston Ring Co., Ltd.
International Classes:
F02F5/00; F16J1/09; F16J9/28; F02F3/00; (IPC1-7): F02F3/00; F02F5/00; F16J1/09; F16J9/28
Domestic Patent References:
| JP58142342U | ||||
| JP582349U |
Attorney, Agent or Firm:
Takashi Ishida (3 others)
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