Patents by Inventor Joseph J. Springer

Joseph J. Springer 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).

  • Electric vehicle propulsion system employing AC induction motor control
    Patent number: 5831409
    Abstract: An electric vehicle propulsion system having a motor with first and second electrically isolated windings and a system control unit for controlling the motor, wherein the system control unit includes a first power bridge for driving the first windings and a second power bridge for driving the second windings.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: November 3, 1998
    Assignee: Northrop Grumman Corporation
    Inventors: Frank A. Lindberg, David L. Schantz, Jr., Brian H. Smith, Charles S. Kerfoot, Joseph J. Springer, Patricia A. O'Donnell, James H. DeOms, Ronnie L. Starling, Michael J. Ankrom, James L. Munro, Geoffrey B. Lansberry, Beth A. Herman, William B. Hall, Marshall G. Jones, William B. Winkel, Brian A. DeAbreu, Thomas C. Underwood, Todd M. Zaranski, Aaron D. Valdivia, Richard M. Young, Frank E. Altoz, Ngon B. Nguyen, Eric L. Mohler
  • Method of manufacturing heat dissipating transformer coil
    Patent number: 5634262
    Abstract: An easy to assemble transformer for use in an electronics module of an electric vehicle. The transformer can be assembled from the "top down," thus alleviating the need to build the transformer as a subassembly unit. During manufacture of the transformer, windings are wound onto a thermally conductive coil form. Next upper and lower E-shaped core members are inserted into openings in the top and bottom of the form so that the side legs and the center legs of the E's touch and are in alignment. The thermally conductive coil form has a portion that touches a cold plate when the transformer is mounted on the cold plate. The transformer is further secured to the cold plate by a mounting bracket.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: June 3, 1997
    Assignee: Northrop Grumman Corporation
    Inventors: Patricia A. O'Donnell, Charles S. Kerfoot, Joseph J. Springer
  • Heat dissipating transformer coil
    Patent number: 5469124
    Abstract: An easy to assemble transformer for use in an electronics module of an electric vehicle. The transformer can be assembled from the "top down," thus alleviating the need to build the transformer as a subassembly unit. During manufacture of the transformer, windings are wound onto a thermally conductive coil form. Next upper and lower E-shaped core members are inserted into openings in the top and bottom of the form so that the side legs and the center legs of the E's touch and are in alignment. The thermally conductive coil form has a portion that touches a cold plate when the transformer is mounted on the cold plate. The transformer is further secured to the cold plate by a mounting bracket.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: November 21, 1995
    Assignee: Westinghouse Electric Corp.
    Inventors: Patricia A. O'Donnell, Charles S. Kerfoot, Joseph J. Springer