Cryodynamics, LLC

Stephen F Malaker

Chester B Pawelski

Alfred Gorawski

A modified Stirling cycle cryogenic refrigerator having an improved unloader valve mechanism for bypassing the compressor cylinder for a short time during start-up in order to reduce the starting torque on the motor driving the pistons and when the drive motor is turned off in order to prevent the refrigerator from spontaneously running in reverse.

Unloader valve for cryogenic refrigerator

A modified Stirling cycle cryogenic refrigerator having a cold head, compressor and expander cylinders connected by a channel, and a compressor piston and an expander piston reciprocally mounted in the respective cylinders. A thin-walled hollow, evacuated, cylinderical metal extender is mounted on the side of the expander piston close to the cold head for shielding the expander from the low temperatures of the working gas in the vicinity of the cold head.

Cryogenic refrigerator

A vehicle air conditioning system in which air or a working liquid is circulated through a heat exchanger mounted in intimate thermal contact with the cold head of a modified Stirling cycle refrigerator. The working liquid is circulated through a heat conductive tube to the location of the vehicle to be cooled. Second heat exchangers are connected to the tube at each of the locations and the air to be cooled is blown through the second heat exchangers. If air is circulated through the cold head mounted heat exchanger, the cooled air is ducted to the locations in the vehicle to be cooled.

Vehicle air conditioner

Modified Stirling cycle refrigerators having a cam drive unit which is illustrated as being implemented either as a rotatable cylinder having a pair of circumferential camming grooves or as wobble plates having camming tracks on the periphery thereof. The cam drive unit drives the compressor and expander piston of the refrigerator through cam followers. Refrigerator embodiments having a plurality of compressor-expander piston pairs driven from a single cam drive are also disclosed.

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Mountainside, NJ, United States of America

Stephen F Malaker