Oil ring assembly

Details Oil ring assembly Oil ring assembly

1974-11-19

1976-05-11

Rothberg, Samuel B.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16J 906

Patent

active

039558231

ABSTRACT:
An oil ring assembly for internal combustion engine pistons including an annular split piston ring with an inner circumferential groove, a radially expandable split annular spring in the groove, and a bridging means in the groove spanning the gap between opposite ends of the piston ring. The spring is preferably a coil spring and the bridging means is preferably a cylindrical arcuate segment located between opposite ends of the spring with pins on each end extending inside the coils of the spring. Alternatively, the arcuate segment may be formed from a tightly wound coil spring. A second enbodiment utilizes a serpentine expander as the spring and the bridging means comprises a flat arcuate segment located in a notch in the expander adjacent the gap in the piston ring.

REFERENCES:
patent: 1796791 (1931-03-01), Johnson
patent: 2395429 (1946-02-01), Powell
patent: 3099455 (1963-07-01), Mayfield

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