Piston ring

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

Patent

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Details

277224, F16J 914

Patent

active

042563186

ABSTRACT:
A parted annular piston ring having an outer periphery for engaging a cylinder wall of an internal combustion engine. A band of hard, wear-resistant material is secured in a groove which extends circumferentially completely around the outer periphery. The band is disposed axially between upper and lower narrow lands. An overlapping joint construction is provided at the parted ends of the ring and comprises mutually circumferentially overlappable surfaces inclined at an acute angle relative to the plane of the ring and terminating in the outer periphery of the ring along edges disposed in the upper land. The upper land is wider than the lower land, and the mutually overlappable joint surfaces terminate at their radially inward edges in the bottom side wall of the ring. The band has axial extending end edges exposed at the split, and the outer periphery of the ring has a barrel face contour such that the maximum outside diameter of the ring falls within the outer wear surface of the band.

REFERENCES:
patent: 1392536 (1921-10-01), Syfert
patent: 2962332 (1960-11-01), Hale
patent: 3608911 (1971-09-01), Prasse
patent: 4040637 (1977-08-01), McCormick
patent: 4106782 (1978-08-01), Hyde
patent: 4189161 (1980-02-01), Grimm

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