Three-piece oil-ring with an inward protrusion

Details Three-piece oil-ring with an inward protrusion Three-piece oil-ring with an inward protrusion

1985-10-03

1987-04-21

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

267 15, 277141, 277215, 277216, F16J 906

Patent

active

046590935

ABSTRACT:
A three-piece oil-ring with a pair of side rails and an expander disposed between the side rails. The expander extends in a circumferential direction and has waves in a radial direction. Flat portions are located at radially inner portions of the expander. At a plurality of the flat portions protrusions extend radially inward. The protrusions contact a bottom surface of an oil-ring groove of a piston and prevents overlapping of the ends of the expander. The protrusion may be provided with holes at both sides thereof and a wire may be passed through the holes to prevent overlapping of the ends of the expander.

REFERENCES:
patent: 2064576 (1936-12-01), Teetor
patent: 2078395 (1937-04-01), Luthy
patent: 2110562 (1938-03-01), Teetor
patent: 2170276 (1939-08-01), Philips
patent: 2910334 (1959-10-01), Hamm
patent: 3261612 (1966-07-01), Games
patent: 3430968 (1969-03-01), Hesling et al.
patent: 3606354 (1971-09-01), Prasse et al.
patent: 3695622 (1972-10-01), Davis et al.

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