Patents by Inventor Chester B. Pawelski

Chester B. Pawelski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Unloader valve for cryogenic refrigerator
    Patent number: 4912932
    Abstract: 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.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: April 3, 1990
    Assignee: Cryodynamics, Inc.
    Inventors: Stephen F. Malaker, Chester B. Pawelski