Patents by Inventor Philip A. E. Jeffery

Philip A. E. Jeffery 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).

  • Hub-mounted actuators for blade pitch collective control
    Patent number: 4555219
    Abstract: Blade collective pitch control is provided for a rotor system by rotary actuators located between adjacent blades. Each actuator is connected to the leading edge of one adjacent blade and the trailing edge of the other adjacent blade.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: November 26, 1985
    Assignee: United Technologies Corporation
    Inventors: Philip A. E. Jeffery, Greg R. Luecke
  • Pneumatic valve control for circulation control aircraft
    Patent number: 4507050
    Abstract: A circulation control rotor system in which butterfly valves (44, 46) control the flow of compressed air from a plenum chamber (40) to the rotor blades (14). Each has an actuator (48, 52) positioning the valve in accordance with a control input and in which a spring loaded averaging linkage (120) between adjacent valves around a plenum chamber circumference acts to position the valve at an average position of the two adjacent valves if a fault in the actuator or within its control or power system should develop. Should such a fault develop, as determined by a comparison of actual valve position with command position, the faulty valve's actuator is shut down.
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: March 26, 1985
    Assignee: United Technologies Corporation
    Inventors: Philip A. E. Jeffery, Thomas H. Lawrence
  • Compensating linkage for main rotor control
    Patent number: 4245956
    Abstract: A compensating linkage for the rotor control system on rotary wing aircraft is disclosed. The main rotor and transmission are isolated from the airframe structure by elastic suspension. The compensating linkage prevents unwanted signal inputs to the rotor control system caused by relative motion of the airframe structure and the main rotor and transmission.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: January 20, 1981
    Inventors: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Philip A. E. Jeffery, Rudolf F. Huber