Patents by Inventor Leslie S. Terp

Leslie S. Terp 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).

  • Patent number: 4903578
    Abstract: An electropneumatic rotary actuator has proportional fluid valving providing introduction and exhaust of pressurized fluid to and from a working chamber of the actuator. By control of the admission angle and venting angle of the fluid pressure and flow with respect to top dead center and bottom dead center of a working piston of the actuator both the torque level and gas consumption rates of the actuator may be controlled. Further by modulating the average working fluid pressure within the actuator the stiffness or resistance to backdriving of the actuator may be controlled. A proportional linear electrical solenoid is disclosed and employed in the actuator of the present invention to drive a double-acting closed-centered valve device. Because of its lightweight, relatively simplicity, high stiffness to backdriving, and relatively low gas consumption rate, the present actuator is expected to find application in airborne vehicles.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: February 27, 1990
    Assignee: Allied-Signal Inc.
    Inventor: Leslie S. Terp
  • Patent number: 4754690
    Abstract: An electrically controlled, fluid driven actuator valve, in which an electrical signal drives a solenoid, which at any one time operates one of two flexible valve elements which, when opened causes a fluid pressure differential in a piston like hydraulic actuator chamber, to thereby drive an actuator rod, which then acts on any device desired to be controlled. The valve is of simple design with a minimum of moving parts, and is especially useful in missile and aircraft applications.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: July 5, 1988
    Assignee: Allied-Signal Inc.
    Inventors: Ronald J. Louis, Leslie S. Terp
  • Patent number: 4560121
    Abstract: An automotive vehicle includes an aerodynamic fin effective for vehicle control at relatively high vehicle velocity, and a nozzle directing a reaction jet toward said fin render the latter also effective for vehicle control at relatively low vehicle velocity.
    Type: Grant
    Filed: May 17, 1983
    Date of Patent: December 24, 1985
    Assignee: The Garrett Corporation
    Inventor: Leslie S. Terp
  • Patent number: 4051877
    Abstract: Apparatus for transferring gas from a first container to a second container of higher pressure comprising a free-piston compressor having a driving piston and cylinder, a smaller diameter driven piston and cylinder, and a rod member connecting the driving and driven pistons for mutual reciprocation in their respective cylinders. A conduit may be provided for supplying gas to the driven cylinder from the first container. Also provided is control apparatus for intermittently introducing gas to the driving piston, from the first container, to compress gas by the driven piston for transfer to the second higher pressure container.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: October 4, 1977
    Inventors: James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher, Leslie S. Terp