Piston ring assembly and expander

Details Piston ring assembly and expander Piston ring assembly and expander

1986-03-13

1987-09-22

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277141, 267 15, F16J 906

Patent

active

046950648

ABSTRACT:
A piston-and-ring assembly includes a generally cylindrical piston, a circumferential groove provided in the piston and having a bottom and two radial flanks forming opposite sides of the groove; and an expander spring ring accommodated in the groove and including a plurality of generally radially extending tongues arranged in a circumferential series. Each tongue has, at a radially inward end, a leg portion extending at a first angle other than zero to the respective tongue from which it extends. An oil scraper annular lamina is situated in the groove and is supported axially by the tongues and is abutted radially by the leg portions. An extension forms part of each leg portion and is oriented thereto at an inclination. Each extension has a length which extends substantially from one of the flanks to the other.

REFERENCES:
patent: 2855254 (1958-10-01), Beck et al.
patent: 3627333 (1971-12-01), Hill
patent: 4462602 (1984-07-01), Brauers et al.

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