Oil scraper piston ring with elliptical oil vent holes

Details Oil scraper piston ring with elliptical oil vent holes Oil scraper piston ring with elliptical oil vent holes

1987-03-26

1989-01-10

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277140, 267 15, F16J 912, F16J 922

Patent

active

047968982

ABSTRACT:
Oil scraping piston ring of profiled steel having punched-in oil vent holes. To keep at a minimum the bulging at the holes developed during coiling, the oil vent holes are given an elliptical or rhombic outline.

REFERENCES:
patent: 2025299 (1935-12-01), Mitchell
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patent: 2848288 (1958-08-01), Johnson
patent: 3378268 (1968-04-01), Anderson
patent: 3677558 (1972-07-01), Sugahara
patent: 4045036 (1977-08-01), Shunta
patent: 4214762 (1980-07-01), McCormick et al.
patent: 4473232 (1984-09-01), Umeha et al.
patent: 4497497 (1985-02-01), Berti
patent: 4522412 (1985-06-01), Kubo

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