Patents by Inventor Stephen R. LaCroix

Stephen R. LaCroix 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 bleed air control apparatus and methods
    Patent number: 4428194
    Abstract: A turbine engine accessory power unit has a compressor bleed air control system in which a surge bleed valve is proportionally and integrally controlled to maintain a constant minimum compressor bleed flow rate slightly above the compressor's surge flow rate. The system control parameter is automatically reset as a function of the position of the compressor's adjustable inlet guide vanes to assure optimum control system performance throughout the air delivery range of the compressor.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: January 31, 1984
    Assignee: The Garrett Corporation
    Inventors: Richard F. Stokes, James D. Timm, Stephen R. LaCroix, Milton R. Adams
  • Compressor bleed air control apparatus and method
    Patent number: 4380893
    Abstract: A turbine engine accessory power unit has a compressor bleed air control system in which a surge bleed valve is proportionally and integrally controlled to maintain a constant minimum compressor bleed flow rate slightly above the compressor's surge flow rate. The system control parameter is automatically reset as a function of the position of the compressor's adjustable inlet guide vanes to assure optimum control system performance throughout the air delivery range of the compressor.
    Type: Grant
    Filed: February 19, 1981
    Date of Patent: April 26, 1983
    Assignee: The Garrett Corporation
    Inventors: Richard F. Stokes, James D. Timm, Stephen R. LaCroix, Milton R. Adams
  • Gas turbine fuel control system
    Patent number: 4337615
    Abstract: An electronic fuel control system for varying the fuel flow to a gas turbine engine during the engine's acceleration. The reference speed set point of the engine's fuel controlling governor is increased as a function of the elapsed time from engine start-up and the engine characteristics so that the engine accelerates substantially along its "required to run line.
    Type: Grant
    Filed: March 21, 1979
    Date of Patent: July 6, 1982
    Assignee: The Garrett Corporation
    Inventor: Stephen R. LaCroix