Patents by Inventor David J. Rolling

David J. Rolling 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).

  • Electrical apparatus with synthetic fiber and binder reinforced cellulose insulation paper
    Patent number: 6980076
    Abstract: An electrical apparatus includes at least one conductor and an insulation paper surrounding at least part of the conductor. The insulation paper includes a wood pulp fiber, a synthetic fiber, and a binder material. The synthetic fiber is present at between approximately 2 and 25 weight percent.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: December 27, 2005
    Assignee: McGraw Edison Company
    Inventors: David J. Rolling, Richard L. Stegehuis, Richard M. Marusinec, Sam J. Ferrito
  • Polymer sheet core and coil insulation for transformers
    Patent number: 6933824
    Abstract: A transformer includes a core defining a core window, a first coil surrounding a portion of the core and including a portion located within the core window, a second coil surrounding a portion of the core and including a portion located within the core window, and a polymer barrier insulation member that is located at least partially within the core window and positioned between the first coil and the second coil.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: August 23, 2005
    Assignee: McGraw-Edison Company
    Inventors: Richard M. Marusinec, Stewart W. Durian, David J. Rolling
  • Polymer sheet core and coil insulation for transformers
    Publication number: 20040150498
    Abstract: A transformer includes a core defining a core window, a first coil surrounding a portion of the core and including a portion located within the core window, a second coil surrounding a portion of the core and including a portion located within the core window, and a polymer barrier insulation member that is located at least partially within the core window and positioned between the first coil and the second coil.
    Type: Application
    Filed: August 14, 2003
    Publication date: August 5, 2004
    Inventors: Richard M. Marusinec, Stewart W Durian, David J. Rolling