Integral spring piston ring

Details Integral spring piston ring Integral spring piston ring

1976-05-10

1978-03-21

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277200, F16J 906

Patent

active

040799492

ABSTRACT:
A one-piece annular oil control piston ring for internal combustion engines is adapted to be received with a peripheral groove in a piston. The ring is of generally U-shaped cross section defined by a pair of opposed sidewalls which project inwardly of the ring from a central peripheral wall thereof. A pair of scraper rims projects outwardly of the ring from the outer face of the peripheral wall. Spring members are cut from the peripheral wall and project between the sidewalls inwardly of the ring a distance sufficiently inwardly of the sidewall edges to enable the spring members to engage the back wall of the piston groove in which the ring is disposed. The spring action of the spring members biases the piston ring outwardly of the groove so that the scraping rims are maintained in scraping engagement with the cylinder walls.

REFERENCES:
patent: 1288085 (1918-12-01), McGinniss
patent: 2311557 (1943-02-01), Mason
patent: 2720435 (1955-10-01), Hamm
patent: 3326561 (1967-06-01), Braendel
patent: 3677558 (1972-07-01), Sugahara
New Developments in Piston Rings for the Modern Diesel Engine by H. E. McCormack et al., presented at the 1975 SAE Off-Highway Vehicle Meeting, Milwaukee, Wisconsin, Sept. 8-11, 1975.

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