Rolled metal piston ring

Details Rolled metal piston ring Rolled metal piston ring

1978-08-03

1980-07-29

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16J 906

Patent

active

042147620

ABSTRACT:
A rolled steel oil control piston ring for internal combustion engines is of generally U-shaped cross section with a pair of opposed rigid sidewalls projecting inwardly of the ring from a central peripheral wall thereof. A pair of flat-faced solid scraper rims formed by closed pleats rolled from the peripheral wall extend outwardly of the ring. The ring is made by rolling flat strip steel stock through a series of profiled rollers. Pleats are formed in the central portion by the profiled rollers and the pleats are closed on themselves to provide the solid scraper rims. The finished strip is then punched to provide the vent openings in the peripheral wall, and coiled and cut to form individual piston rings.

REFERENCES:
patent: 2642323 (1953-06-01), Duesenberg
patent: 2830861 (1958-04-01), Marien
patent: 2848288 (1958-08-01), Johnson
patent: 3134602 (1964-05-01), Wilson
patent: 3281156 (1966-10-01), Mayhew
patent: 3370858 (1968-02-01), Braendel
patent: 3378268 (1968-04-01), Anderson
patent: 3467397 (1969-09-01), Sugahara
patent: 4079949 (1978-03-01), McCormick

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