Pumps – Three or more cylinders arranged in parallel – radial – or...
Patent
1986-02-12
1987-10-06
Shoap, Allan N.
Pumps
Three or more cylinders arranged in parallel, radial, or...
92159, 92172, 92251, 277173, 277177, 277206R, F01B 3110, F04B 118, F16J 920, F16J 928
Patent
active
046979921
ABSTRACT:
A refrigerant compressor includes a piston with two circumferential grooves on the outer surface of the piston, one of the grooves being located near the top and the other near the bottom. Conical piston rings made of plastic are disposed in the grooves. The piston rings, which have an outer diameter greater than that of the piston, have a curved surface shaped so that the outer diameter of the curved surface at one axial end of the piston ring is smaller than that at the other axial end. This unique arrangement of the curved conical seals reduces the loss of horsepower in motor driven refrigerant compressors by providing improved sealing between the piston and cylinder.
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Hatakeyama Hideharu
Takahashi Hidenao
Sanden Corporation
Shoap Allan N.
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