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Cam drive for cryogenic refrigerator

  • US 4,796,430 A
  • Filed: 08/14/1987
  • Issued: 01/10/1989
  • Est. Priority Date: 08/14/1987
  • Status: Expired due to Fees
First Claim
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1. A modified Stirling cycle refrigerator having a first piston for compressing a working gas in a first cylinder, a second piston for expanding the working gas in a second cylinder, a channel connecting the cylinders, and a cold head in thermal contact with the working gas in the second cylinder, comprisingfirst and second camming elements mounted for rotation at a phase angle with respect to one another;

  • a first cam follower mounted in contact with said first camming element and coupled to said first piston for reciprocally driving said first piston in said first cylinder in response to rotation of said first camming element;

    a second cam follower mounted in contact with said second camming element and coupled to said second piston for reciprocally driving said second piston in said second cylinder at a predetermined phase angle with said first piston in response to rotation of said second camming element; and

    motive means for rotating said first and second camming elements.

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