Piston assembly for a refrigerant compressor

Details Piston assembly for a refrigerant compressor Piston assembly for a refrigerant compressor

1984-12-20

1986-06-10

Freeh, William L.

Pumps

Three or more cylinders arranged in parallel, radial, or...

92159, 92251, F04B 118, F01B 3110

Patent

active

045940550

ABSTRACT:
A piston assembly for a reciprocating piston type compressor includes a piston slidably disposed within aluminum alloy cylinders. The pistons have two annular grooves provided toward opposite ends on their outer peripheral surfaces. A conical shaped piston ring formed of resin and having an outer diameter larger than the outer diameter of the piston is disposed in each groove. The conical shaped piston ring creates a gap between the piston and cylinder to prevent direct contact between the piston and cylinder to thereby avoid abnormal wearing while effectively maintaining the flow of lubricating oil from the cylindrical chamber to the crank chamber.

REFERENCES:
patent: Re27844 (1973-12-01), Olson, Jr.
patent: 2615769 (1952-10-01), Barnes
patent: 2801140 (1957-07-01), Kretzer
patent: 3885460 (1975-05-01), Park
patent: 3982471 (1976-09-01), Finger
patent: 4011029 (1977-03-01), Shimizo
patent: 4351227 (1982-09-01), Copp
patent: 4416589 (1983-11-01), Perry
patent: 4480964 (1984-11-01), Skinner

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