Combination of piston and piston ring

Details Combination of piston and piston ring Combination of piston and piston ring

2006-04-11

2006-04-11

Look, Edward K. (Department: 3745)

Expansible chamber devices

Piston

Open-ended hollow skirt type

C277S442000, C277S443000

Reexamination Certificate

active

07024982

ABSTRACT:
A combination of piston and piston ring includes a piston having a piston ring groove in which at least the groove portion of the piston is made of steel, a piston ring made of cast iron and fitted into the piston ring groove, and a hard coat film formed to at least an outer peripheral sliding surface of the piston ring.

REFERENCES:
patent: 3575433 (1971-04-01), Beyer et al.
patent: 3661402 (1972-05-01), Iizuka
patent: 3810640 (1974-05-01), Ahlen
patent: 4074616 (1978-02-01), Gale et al.
patent: 4233490 (1980-11-01), Shalai et al.
patent: 4679493 (1987-07-01), Munro et al.
patent: 5241748 (1993-09-01), Ishida
patent: 5258930 (1993-11-01), Fukuyoshi et al.
patent: 5743012 (1998-04-01), Adams et al.
patent: 5972128 (1999-10-01), Miwa
patent: 6235415 (2001-05-01), Ogawa et al.
Metals Handbook, Dec. 1998, ASM International, 2nd edition, p. 319.

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