Patents by Inventor Timothy M. Frank

Timothy M. Frank 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).

  • Methods and apparatuses for detecting surge in centrifugal compressors
    Patent number: 5894736
    Abstract: A surge detection system for use in a fluid system having a load driven by a centrifugal compressor, the compressor being driven by an electric motor. The surge detection system comprises a means for sensing a differential pressure developed across the compressor and a means for sensing a current representing input power to the motor. The surge detection system further comprises a first computing means responsive to the differential pressure developed across the compressor for indicating when a valid surge is occurring in the compressor, and a second computing means responsive to the variable speed drive current for indicating when a valid surge is occurring in the compressor.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: April 20, 1999
    Assignee: York International Corporation
    Inventors: Gregory K. Beaverson, Harold R. Schnetzka, Timothy M. Frank
  • Methods and apparatuses for detecting surge in centrifugal compressors
    Patent number: 5746062
    Abstract: A surge detection system for use in a fluid system having a load driven by a centrifugal compressor, the compressor being driven by an electric motor. The surge detection system comprises a means for sensing a differential pressure developed across the compressor and a means for sensing a current representing input power to the motor. The surge detection system further comprises a first computing means responsive to the differential pressure developed across the compressor for indicating when a valid surge is occurring in the compressor, and a second computing means responsive to the variable speed drive current for indicating when a valid surge is occurring in the compressor.
    Type: Grant
    Filed: April 11, 1996
    Date of Patent: May 5, 1998
    Assignee: York International Corporation
    Inventors: Gregory K. Beaverson, Harold R. Schnetzka, Timothy M. Frank