Patents by Inventor Larry Llewellyn Smith

Larry Llewellyn Smith 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).

  • Brushless, windingless rotor, variable reluctance, electromechanical machines, having wound-field excitation
    Patent number: 7709989
    Abstract: A combination of a unique construction format, involving two sets of rotor and stator embodiments, working in co-operation with each other, in a unique fixed, direct-axis and quadrature-axis orientation, and with unique field-winding, back-EMF cancellation, connection schemes to substantially negate the field-winding harmonic currents in the field-winding excitation circuits, and provide for a substantially square-wave shaped, open-terminal, armature output-voltage characteristic.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: May 4, 2010
    Inventor: Larry Llewellyn Smith
  • Brushless, windingless rotor, variable reluctance, electromechanical machines, having wound-field excitation
    Publication number: 20090121583
    Abstract: A combination of a unique construction format, involving two sets of rotor and stator embodiments, working in co-operation with each other, in a unique fixed, direct-axis and quadrature-axis orientation, and with unique field-winding, back-EMF cancellation, connection schemes to substantially negate the field-winding harmonic currents in the field-winding excitation circuits, and provide for a substantially square-wave shaped, open-terminal, armature output-voltage characteristic.
    Type: Application
    Filed: November 14, 2007
    Publication date: May 14, 2009
    Inventor: Larry Llewellyn Smith