Dual capacity reciprocating compressor

Details Dual capacity reciprocating compressor Dual capacity reciprocating compressor

1982-11-02

1984-10-30

Freeh, William L.

Expansible chamber devices

Displacement control of plural cylinders arranged in...

Stroke of one working member adjustable relative to another

417534, 417539, 417429, F04B 2306, F01B 704

Patent

active

044794193

ABSTRACT:
A multi-cylinder compressor 10 particularly useful in connection with northern climate heat pumps and in which different capacities are available in accordance with reversing motor 16 rotation is provided with an eccentric cam 38 on a crank pin 34 under a fraction of the connecting rods, and arranged for rotation upon the crank pin between opposite positions 180.degree. apart so that with cam rotation on the crank pin such that the crank throw is at its normal maximum value all pistons pump at full capacity, and with rotation of the crank shaft in the opposite direction the cam moves to a circumferential position on the crank pin such that the overall crank throw is zero. Pistons 24 whose connecting rods 30 ride on a crank pin 36 without a cam pump their normal rate with either crank rotational direction. Thus a small clearance volume is provided for any piston that moves when in either capacity mode of operation.

REFERENCES:
patent: 3010339 (1961-11-01), Brock
patent: 4143995 (1979-03-01), Diuisi
patent: 4236874 (1980-12-01), Sisk

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