Spacer-expander for a piston oil control ring

Details Spacer-expander for a piston oil control ring Spacer-expander for a piston oil control ring

1976-09-08

1977-10-11

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 76, 277155, 267 15, F16J 920

Patent

active

040531643

ABSTRACT:
In a spacer-expander for a piston oil control ring of the type which includes a circumferential series of alternating inner and outer crowns successively connected by radially diverging spring legs and a support pad extending radially outwardly from each inner crown and connected thereto by a pad leg, the improvement wherein each pad leg comprises an arcuate reverse bend extending radially inwardly and then radially outwardly from an inner crown to a corresponding support pad. In a modification, each pad extends radially outwardly at an angle of more than 90.degree. but equal to or less than 95.degree. with respect to the corresponding inner crown in the free-state of the expander.

REFERENCES:
patent: 2474493 (1949-06-01), Phillips
patent: 2744803 (1956-05-01), Marien
patent: 2785028 (1957-03-01), Olson
patent: 2809081 (1957-10-01), Olson
patent: 2859079 (1958-11-01), Olson
patent: 3124364 (1964-03-01), Burns et al.
patent: 3191947 (1965-06-01), Hamm
patent: 3191948 (1965-06-01), Hamm
patent: 3228704 (1966-01-01), Hamm
patent: 3477732 (1969-11-01), Warrick
patent: 3628800 (1971-12-01), Prasse
patent: 3741569 (1973-06-01), Mayhew
patent: 3787059 (1974-01-01), McCormick

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