Patents by Inventor Richard F. Stokes

Richard F. Stokes 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).

  • Gas turbine starter assist torque control system
    Patent number: 6035626
    Abstract: An electronic control system for regulating the amount of torque applied by a starter/generator to a gas turbine engine during startup. The control system senses engine speed, compares the engine's actual acceleration with a predetermined acceleration, and adjusts the torque to the engine so that the engine accelerates along the predetermined schedule. The predetermined schedule is a function of the engine's speed or time, inlet conditions and oil temperature.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: March 14, 2000
    Assignee: Allied-Signal Inc.
    Inventors: Robert E. Wahl, Richard F. Stokes
  • 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
  • Four-way clevis valve and method
    Patent number: 4046061
    Abstract: A four-way fluid flow control valve for selectively interconnecting opposite sides of a fluid motor with a source of fluid pressure and a low pressure return line for driving the motor in opposite directions. A clevis-like, bifurcated metering member has opposed, cup-shaped elements at its bifurcated end which are shiftable across opposed, flat surfaces to produce the desired fluid flow interconnections. The cup-like elements present fluid transfer zones for selectively interconnecting different fluid flow passages.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: September 6, 1977
    Assignee: The Garrett Corporation
    Inventor: Richard F. Stokes