Oil-ring including two rail rings and an expander-spacer ring wh

Details Oil-ring including two rail rings and an expander-spacer ring wh Oil-ring including two rail rings and an expander-spacer ring wh

1984-04-09

1985-10-22

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277216, 267 15, F16J 920, F16J 922

Patent

active

045484163

ABSTRACT:
A composite oil-ring comprises a pair of rail rings and an expander-spacer ring. The expander-spacer ring is laterally extending U-shaped in cross section providing rail supporting legs and an inwardly open channel between the legs of the U. The expander-spacer ring is integrally formed with a plurality of axially extending rail engaging portions circumferentially spaced at the inner periphery of each of the legs, and has a plurality of slots extending radially cut from the inner peripheries of the legs. Also, the rail engaging portions may have circumferential central portions with the same curvature as that of the rail rings and circumferential end portions with a smaller curvature than that of the rail rings. Such structure reduces the abrasion of the composite oil-ring and prevents an independent movement of the rail rings.

REFERENCES:
patent: 2635022 (1953-04-01), Shirk
patent: 2827349 (1958-03-01), Burns
patent: 2967746 (1961-01-01), Braendel
patent: 3228704 (1966-01-01), Hamm
patent: 3683477 (1972-08-01), Sugahara
patent: 3752490 (1973-08-01), Geffroy
patent: 4139205 (1979-02-01), Duck et al.
patent: 4194747 (1980-03-01), Nisper

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