Oil control ring of two piece type for internal combustion engin

Details Oil control ring of two piece type for internal combustion engin Oil control ring of two piece type for internal combustion engin

1997-10-27

1999-10-12

Brittain, James R.

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

277474, 277476, 277478, B60T 11236, F02F 500, F16J 906, F16J 920

Patent

active

059644672

ABSTRACT:
The oil control ring 1 is provided to attach in an annular groove 10 formed in a piston 2 for internal combustion engine. The spacer expander 4 comprises a base 8, a plurality of supports 6 and a plurality of arms 7. The supports 6 and arms 7 are integrally formed with the base 8 to extend from an outer periphery 8a or inner periphery 8b of the base 8. The supports 6 resiliently urge a side rail 5 mounted on the space expander 4 toward an upper surface 14 of the annular groove 10 so that during upward stroke of the piston 2, the supports 6 can be resiliently deformed to form between the side rail 5 and upper surface 14 of the groove 10 a radial passage through which oil scraped by the side rail can be drained. Each arm 7 is provided with a lug 8 to resiliently urge the side rail 5 in radial and outward direction.

REFERENCES:
patent: 2817565 (1957-12-01), Heiss
patent: 2833604 (1958-05-01), Hunt
patent: 2859079 (1958-11-01), Olson
patent: 2999728 (1961-09-01), Estey
patent: 3191947 (1965-06-01), Hamm
patent: 3477732 (1969-11-01), Warrick
patent: 3628800 (1971-12-01), Prasse
patent: 3741569 (1973-06-01), Mayhew

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