Patents by Inventor Raymond Mark Calfo

Raymond Mark Calfo 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).

  • Trapezoidal shaped magnet flux intensifier motor pole arrangement for improved motor torque density
    Patent number: 6879075
    Abstract: A permanent magnet synchronous machine with improved torque and power characteristics. A circumferential-oriented rotor assembly is provided with alternating permanent magnets and magnetic pole pieces. In order to reduce the amount of leakage flux in the rotor and increase the effective length of the permanent magnet, a trapezoidal or otherwise tapered permanent magnet structure is used. By alternating trapezoidal permanent magnet, and magnetic pole pieces, a higher intensity magnetic field is created in the air gap utilizing the same radial space in the motor without altering the weight or volume of the motor compared to conventional machines.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: April 12, 2005
    Assignee: Curtiss-Wright Electro-Mechanical Corporation
    Inventors: Raymond Mark Calfo, Mark Peter Krefta
  • Trapezoidal shaped magnet flux intensifier motor pole arrangement for improved motor torque density
    Publication number: 20040150283
    Abstract: A permanent magnet synchronous machine with improved torque and power characteristics. A circumferential-oriented rotor assembly is provided with alternating permanent magnets and magnetic pole pieces. In order to reduce the amount of leakage flux in the rotor and increase the effective length of the permanent magnet, a trapezoidal or otherwise tapered permanent magnet structure is used. By alternating trapezoidal permanent magnet, and magnetic pole pieces, a higher intensity magnetic field is created in the air gap utilizing the same radial space in the motor without altering the weight or volume of the motor compared to conventional machines.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventors: Raymond Mark Calfo, Mark Peter Krefta