Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1993-03-15
1997-04-08
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277138, 277216, 92193, F16J 906
Patent
active
056180462
ABSTRACT:
A piston ring assembly comprises a piston ring, a spring for providing an outward force on the ring, and a rail for engaging a cylinder wall. The piston ring is retained in a piston groove in a piston. During upward movement of the piston in a cylinder, oil above the ring face is forced between the first front surface and the top surface into the piston groove to an inner portion of the piston groove. During downward movement of the piston, the downward force urges cocking of the piston ring about the ring face to tilt the ring face away from the cylinder wall, leaving the lower front of the ring face in scraping abutment with the cylinder wall.
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Dana Corporation
DePumpo Daniel G.
Haushalter Barbara Joan
Leonardi Robert M.
McDonald Frank B.
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