Piston-cylinder sealing device

Details Piston-cylinder sealing device Piston-cylinder sealing device

1980-02-21

1984-07-31

Pollard, Steven M.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 29, 277 73, 123193P, F01B 2910

Patent

active

044626010

ABSTRACT:
The invention relates to a seal for a piston and a cylinder of a double-acting hot gas engine or other applications in which piston rings of plastic materials should be used.
A duct having low resistance against gas flow is provided between the high pressure of the seal and the bottom of a groove for the piston ring. The resistance against gas flow between the high pressure side and the piston ring along the piston and cylinder walls is substantially greater. Thus the piston ring will immediately be forced into a sealing position when the engine is pressurized.

REFERENCES:
patent: 270036 (1883-01-01), Eimecke et al.
patent: 1778200 (1930-10-01), Nibbs
patent: 3335643 (1967-08-01), Wentworth
patent: 3667443 (1972-06-01), Currie et al.
patent: 3927529 (1975-12-01), Hakansson
patent: 4111104 (1978-09-01), Davison, Jr.
patent: 4132417 (1979-01-01), Lagergvist
patent: 4132420 (1979-01-01), Lundholm
patent: 4154207 (1979-05-01), Brehob

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