Reciprocating compressor having a cylinder provided with a gas p

Details Reciprocating compressor having a cylinder provided with a gas p Reciprocating compressor having a cylinder provided with a gas p

1991-12-20

1992-11-17

Bertsch, Richard A.

Pumps

Expansible chamber type

Having pumping chamber pressure responsive distributor

92126, 277 3, 277 27, F04B 2102

Patent

active

051638231

ABSTRACT:
A compressor includes a passage in the sidewall of the cylinder for directing compressed gas against circumferential surfaces of piston rings. The pressure of the gas from the passage counteracts the pressure of gas between the piston ring groove and the piston ring, and urges the piston rings inwardly. The force with which the piston ring is urged into engagement with the cylinder walls is lessened, thereby reducing wear of the piston rings. The arrangement is especially useful for compressors having piston rings formed of low friction polymeric materials, such as fluorine-containing polymers.

REFERENCES:
patent: 1260100 (1918-03-01), Udell
patent: 3514113 (1970-05-01), Weisworm

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