Patents by Inventor Derek Fothergill

Derek Fothergill 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).

  • Compression machinery method and apparatus
    Patent number: 4077743
    Abstract: Compression machinery including a low pressure stage, a high pressure stage and a single aftercooler, further includes a bypass path through which fluid discharged from the low pressure stage is directed about the high pressure stage. The bypass path includes the aftercooler. Upon activation of the high pressure stage, a portion of the fluid flowing through the bypass path is diverted to the suction side of the high pressure stage. As a result of continued operation of the high pressure stage, the flow of fluid through the bypass path is decreased and the flow of fluid through the high pressure stage is increased.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: March 7, 1978
    Assignee: Carrier Corporation
    Inventors: W. Winston Cochrane, Carl H. Geary, Derek Fothergill