Piston ring

Details Piston ring Piston ring

1990-05-01

1991-11-12

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277138, 277200, F16J 906

Patent

active

050642065

ABSTRACT:
An oil control piston ring is described comprising a pair of axially spaced apart side rails, the side rails each having a radially outer periphery forming a rubbing face with a co-operating cylinder wall, an expander having portions which lie between the inner radially extending faces of the side rails and maintain the outer peripheral rubbing faces thereof in a spaced apart relationship characterized in that the radially inner peripheral edge of each side rail is connected by bridging members extending intermittently over at least a part of the inner circumferential length. The side rails and bridge members may be formed from a substantially flat bottomed "U-shaped" channel section.

REFERENCES:
patent: 2290321 (1942-07-01), Engelhardt
patent: 2317580 (1943-04-01), Bauer
patent: 2568655 (1951-09-01), Olson
patent: 2676076 (1954-04-01), Hamm
patent: 3378268 (1968-04-01), Anderson
patent: 3622166 (1971-11-01), Brenneke
patent: 3650537 (1972-03-01), Sugahara
patent: 4572520 (1986-02-01), Shinada

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