Oil ring structure having reduced rigidity

Details Oil ring structure having reduced rigidity Oil ring structure having reduced rigidity

1986-01-13

1988-02-02

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

267 15, 277140, 277215, F16J 906

Patent

active

047225351

ABSTRACT:
An oil-ring comprising 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. At both sides of radially inner portions of the expander, side rail engaging portions protrude in an axial direction. The side rail engaging portions are formed as paired side rail engaging sections within one pitch of the waves, by defining a slit extending in the axial direction at a central portion of one side rail engaging portion. Due to the division from one side rail engaging portion to paired side rail engaging sections, the rigidity of each side rail engaging portion can be weakened appropriately, and each side rail can follow against the cylinder bore surface satisfactorily, thereby decreasing oil consumption.

REFERENCES:
patent: 2250062 (1941-07-01), Hellman
patent: 2877072 (1959-03-01), Pien
patent: 3051499 (1962-08-01), Minegishi
patent: 3261612 (1966-07-01), Games
patent: 3580589 (1971-05-01), Prasse et al.
patent: 4468040 (1984-08-01), Plant

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