Patents by Inventor David Bonnieman

David Bonnieman 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).

  • Rotor for an electrical machine, and an electrical machine including such a rotor
    Patent number: 6614142
    Abstract: A rotor is provided for use at high speed. The rotor comprises a stack of laminations held under compression between opposed flanges. The laminations have a plurality of teeth. Some of the laminations have lugs having passages formed therein through which the bolts that hold the stack in compression pass. The laminations serve to hold bolts against radial deformation at high speed.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: September 2, 2003
    Assignee: Goodrich Control Systems Limited
    Inventors: David Bonnieman, Dennise R Hayward
  • Electric machine and rotor for use therein
    Patent number: 6225723
    Abstract: A rotor for use in an electric machine and a rotary electric machine utilizing such a rotor, the rotor comprising a rotor body provided with a plurality of slots, each slot housing electrical conductors of two independent rotor coils, the conductors being secured in position by an outer wedge member, an inner wedge member being located between the outer wedge member and the conductors, the rotor including pole tips defining load bearing lips located adjacent the radially outer edges of each slot, wherein a part of each coil projects beyond the respective lips in a direction perpendicular to the axis of the coil.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: May 1, 2001
    Assignee: Lucas Industries Limited
    Inventors: John Cooper, David Bonnieman