Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1974-11-08
1976-03-09
Rothberg, Samuel B.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277236, F16J 1500
Patent
active
039428087
ABSTRACT:
A piston ring assembly having a pair of resilient split rings of identical cross section in a single piston groove in which the rings contact each other over a large surface to maintain the gap of one ring diametrically opposed relative to the gap of the other ring to resist passage of oil and compressed gases. The rings each have a separate line contact with the piston which accomplishes sealing without imposing frictional loads detracting from the radial expansion of the rings to produce a tight seal against the cylinder walls. The rings afford spaced seals with the cylinder wall to form an annular oil containing cavity for controlled lubrication of the cylinder wall.
REFERENCES:
patent: 1804848 (1931-05-01), Sandberg et al.
patent: 2068042 (1937-01-01), Teetor
patent: 2459395 (1949-01-01), Smith
patent: 2918340 (1959-12-01), Knoebel
patent: 2940803 (1960-06-01), Phillips
patent: 2970023 (1961-01-01), Thompson
patent: 3174762 (1965-03-01), Hesling et al.
patent: 3456954 (1969-07-01), Prass et al.
Midland-Ross Corporation
Nawalanic Frank J.
Rothberg Samuel B.
Switzer H. Duane
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