Patents by Inventor Nauman Islam

Nauman Islam 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).

  • Compressor-expander set critical speed avoidance
    Patent number: 8360744
    Abstract: A control method and apparatus for critical rotational speed avoidance in a compressor-expander set in a gas refrigeration system. By varying an opening of an antisurge or recycle valve, a shaft power used by the compressor in the compressor-expander set may be varied, thereby varying the rotational speed of the compressor-expander set to move it away from its critical speed zone. Additionally, a feedforward signal may be provided by a compressor-expander set control system to cause an antisurge valve for a recycle compressor to open upon a trip or shutdown of one compressor-expander set.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: January 29, 2013
    Assignee: Compressor Controls Corporation
    Inventors: Saul Mirsky, Wayne Jacobson, David J. Hoogerwerf, Nauman Islam
  • Compressor-Expander Set Critical Speed Avoidance
    Publication number: 20090232663
    Abstract: A control method and apparatus for critical rotational speed avoidance in a compressor-expander set in a gas refrigeration system. By varying an opening of an antisurge or recycle valve, a shaft power used by the compressor in the compressor-expander set may be varied, thereby varying the rotational speed of the compressor-expander set to move it away from its critical speed zone. Additionally, a feedforward signal may be provided by a compressor-expander set control system to cause an antisurge valve for a recycle compressor to open upon a trip or shutdown of one compressor-expander set.
    Type: Application
    Filed: March 13, 2008
    Publication date: September 17, 2009
    Inventors: Saul Mirsky, Wayne Jacobson, David J. Hoogerwerf, Nauman Islam