Resilient plastic piston ring

Details Resilient plastic piston ring Resilient plastic piston ring

1979-11-30

1982-08-03

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277136, 277165, F16J 900, F16J 920

Patent

active

RE0310050

ABSTRACT:
A plastic ring for internal combustion engine pistons. In a preferred embodiment, the ring has a flat outer diameter adapted to engage the inner diameter of a compression piston ring and an inner diameter adapted to engage the backwall of the ring groove. An axial groove slightly spaced from the outer diameter extends into the ring from the top thereof, whereby combustion gases will expand the ring so that it acts as a circumferential expander for the compression ring while preventing blowby of gases through the ring groove. In another modification, the ring is used with its outer diameter acting against the cylinder wall.

REFERENCES:
patent: 2456529 (1948-12-01), Naab
patent: 2745704 (1956-05-01), D'Errico
patent: 2893796 (1959-07-01), Howlett et al.
patent: 3108817 (1963-10-01), Hughes
patent: 3268235 (1966-08-01), Jacobellis
patent: 3418001 (1968-12-01), Rentschler et al.

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