Patents by Inventor James Stenhouse

James Stenhouse 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).

  • Discontinuous cryogenic mixed gas refrigeration system and method
    Patent number: 6644067
    Abstract: A closed circuit refrigeration system of successive coalescent/depth filters provides the almost total removal of liquid refrigerants from a refrigeration gas stream. The liquid refrigerant so extracted is then be returned to the suction side through a metering device such as a capillary line to provide intermediate cooling of the oncoming discharge gas. The auto cascade system utilizes short path plate heat exchangers. The properties of coalescent/depth filters place a physical barrier between the differing temperature/pressure regimes on the discharge side of the system. The provision of a start valve in a line connecting the gas discharge path and the return path close to the cryo-coil enables the use of hermetic compressors and eliminates the requirement for supplementary pressure vessels within auto-cascade cryogenic refrigeration systems.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: November 11, 2003
    Assignee: Telmark Cryogenics Limited
    Inventor: James Stenhouse
  • High efficiency discontinuous cryogenic mixed gas refrigeration system using coalescent (depth) membrane filters and plate heat exchangers and refrigerant therefore
    Publication number: 20020134104
    Abstract: A closed circuit refrigeration system of successive coalescent/depth filters provides the almost total removal of liquid refrigerants from a refrigeration gas stream. The liquid refrigerant so extracted is then be returned to the suction side through a metering device such as a capillary line to provide intermediate cooling of the oncoming discharge gas. The auto cascade system utilizes short path plate heat exchangers. The properties of coalescent/depth filters place a physical barrier between the differing temperature/pressure regimes on the discharge side of the system. The provision of a start valve in a line connecting the gas discharge path and the return path close to the cryo-coil enables the use of hermetic compressors and eliminates the requirement for supplementary pressure vessels within auto-cascade cryogenic refrigeration systems.
    Type: Application
    Filed: November 9, 2001
    Publication date: September 26, 2002
    Inventor: James Stenhouse