Patents by Inventor Jeremiah J. Shaffer

Jeremiah J. Shaffer 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 surge control method
    Patent number: 4900232
    Abstract: A surge control system (16) is provided for a compressor (14) which anticipates the actual surge condition and initiates anti-surge protection in proportion to the magnitude of the anticipated surge condition. This is done by providing a feed forward signal (20) to a summing station (48) along with a normally generated surge control line point (44) to offset this point (44) by an amount determined by the feed forward signal (20). This offset point (50) is used as an input to a controller for controlling the bypass valve (28) in a bypass loop (30) around the compressor (14).
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: February 13, 1990
    Assignee: The Babcock & Wilcox Company
    Inventors: Donald J. Dziubakowski, Marion A. Keyes, IV, Jeremiah J. Shaffer
  • Compressor surge control system
    Patent number: 4861233
    Abstract: A surge control system (16) is provided for a compressor (14) which anticipates the actual surge condition and initiates anti-surge protection in proportion to the magnitude of the anticipated surge condition. This is done by providing a feed foward signal (20) to a summing station (48) along with a normally generated surge control line point (44) to offset this point (44) by an amount determined by the feed forward signal (20). This offset point (50) is used as an input to a controller for controlling the bypass valve (28) in a bypass loop (30) around the compressor (14).
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: August 29, 1989
    Assignee: The Babcock & Wilcox Company
    Inventors: Donald J. Dziubakowski, Marion A. Keyes, IV, Jeremiah J. Shaffer
  • Adaptive gain compressor surge control system
    Patent number: 4697980
    Abstract: An adaptive gain surge control system (18) is disclosed for a centrifugal compressor (14) which reacts to both normal and emergency surge conditions by controlling a bypass valve (48) across the compressor (14) inlet and outlet in response to a variable gain (G) determined by the offset (d) of the surge control line from the surge line of the compressor.
    Type: Grant
    Filed: November 4, 1985
    Date of Patent: October 6, 1987
    Assignee: The Babcock & Wilcox Company
    Inventors: Marion A. Keyes, IV, Jeremiah J. Shaffer
  • Adaptive gain compressor surge control system
    Patent number: 4627788
    Abstract: An adaptive gain surge control system (18) is disclosed for a centrifugal compressor (14) which reacts to both normal and emergency surge conditions by controlling a bypass valve (48) across the compressor (14) inlet and outlet in response to a variable gain (G) determined by the offset (d) of the surge control line from the surge line of the compressor.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: December 9, 1986
    Assignee: The Babcock & Wilcox Company
    Inventors: Marion A. Keyes, IV, Jeremiah J. Shaffer