Patents by Inventor Philip J. Rayner

Philip J. Rayner 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).

  • Ultrasonic motors
    Patent number: 6664712
    Abstract: An ultrasonic motor is described which uses radial vibrations of an electro-active material disc (7) amplified by one or more flextensional diaphragms (6) to drive a rotor (4) pressed in frictional contact with the diaphragm (6) by a force imposed by a spring (3) or magentic attraction. The vibrations are converted by elastic fins (5) into rotary motion of the rotor (4). The motor can be operated in any resonant mode that generates vibration at the surface perpendicular to the contact area. Versions of the motor with one or two rotors are disclosed with the two rotor version being used to produce an output in the same direction or opposite directions.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: December 16, 2003
    Assignee: Cranfield University
    Inventors: Philip J. Rayner, Roger W Whatmore
  • Ultrasonic motors
    Publication number: 20020109433
    Abstract: An ultrasonic motor is described which uses radial vibrations of an electro-active material disc (7) amplified by one or more flextensional diaphragms (6) to drive a rotor (4) pressed in frictional contact with the diaphragm (6) by a force imposed by a spring (3) or magentic attraction. The vibrations are converted by elastic fins (5) into rotary motion of the rotor (4). The motor can be operated in any resonant mode that generates vibration at the surface perpendicular to the contact area. Versions of the motor with one or two rotors are disclosed with the two rotor version being used to produce an output in the same direction or opposite directions.
    Type: Application
    Filed: November 7, 2001
    Publication date: August 15, 2002
    Inventors: Philip J. Rayner, Roger W. Whatmore