Low friction oil control piston ring

Details Low friction oil control piston ring Low friction oil control piston ring

1978-07-10

1980-11-25

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277208, F16J 906

Patent

active

042354471

ABSTRACT:
A low friction oil control piston ring for an internal combustion engine has a cylinder engaging outer surface of shallow wave-like configuration having a plurality of spaced cylinder engaging annular ridges smoothly blended with intermediate shallow valleys connected by oil passages with the interior of the ring. The number and size of the oil passages and their positioning along the sides of the valley walls are selected to provide a balance between friction reducing oil pressure development on the ring face and the ring oil scraping efficiency. Radial grooves may be provided in the ring upper surface as flow paths for engine blowby gases.

REFERENCES:
patent: 1565299 (1925-12-01), Wendel
patent: 2554289 (1951-05-01), Anderson
patent: 3191946 (1965-06-01), Hamm
patent: 3195903 (1965-07-01), Hesling
patent: 3214182 (1965-10-01), Herbruggen
patent: 3573874 (1971-04-01), Hill
patent: 3645174 (1972-02-01), Prasse
Engineer's Handbook of Piston Rings, Seal Rings, Mechanical Shaft Seals, 8th Edition, Koppers Co., Inc., Metal Products Division.

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