Fluidic self adjusting seal assembly

Details Fluidic self adjusting seal assembly Fluidic self adjusting seal assembly

1982-04-05

1984-10-02

Cohen, Irwin C.

Expansible chamber devices

With lubricating means

Piston has lubricant retaining or conducting means

92183, 277 3, 277 74, 277188A, F16J 108, F16J 908

Patent

active

044741065

ABSTRACT:
A fluidic bearing seal assembly comprised of a plurality of floating back ring seals positioned in a plurality of annular grooves in a piston with at least one free-floating sealing wedge fitted to the outer peripheral edge of each backing ring for sliding along the cylinder wall. The piston has an inlet port and one way check valve means in the head thereof through which the working fluid is compressed during the compression stroke into a plurality of passageways that route the working fluid under pressure against said plurality of floating backing ring seals and into a pressure reservoir directly in contact with the cylinder wall and between adjacent backing ring seals to press the backing ring seals and seal wedges against the cylinder wall during the compression stroke and release the pressure from the ring seals and wedges during the return stroke of the piston.

REFERENCES:
patent: 759582 (1904-05-01), Wilson
patent: 1234972 (1917-07-01), Trist
patent: 2749195 (1956-06-01), Kruger
patent: 3186702 (1965-06-01), Taylor

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