Patents by Inventor Walter G. Stiffler

Walter G. Stiffler 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).

  • Apparatus for coating an electromagnetic coil
    Patent number: 5685910
    Abstract: There is disclosed a method and apparatus for coating an electromagnetic coil, particularly stator coils for an electric motor, with an insulating catalyzed resin material. The catalyzed resin material is a two component material comprising an epoxy resin and a catalyst. The catalyzed resin material is a free flowing liquid at a first temperature and begins to cure rapidly at a second elevated temperature. The stator coils are first heated by supplying current to the stator coils to raise the temperature of the stator coils to the first temperature. The free flowing liquid catalyzed resin material is dispensed through nozzles onto the stator coils as the stator coils and the nozzles move relative to each other. After the liquid catalyzed resin material has been dispensed in a predetermined amount, at predetermined locations, for predetermined times, the catalyzed resin material is allowed to penetrate the stator coils.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: November 11, 1997
    Assignee: Reliance Electric Industrial Company
    Inventors: James L. Thigpen, Walter G. Stiffler, James B. Keys, David T. McKinney, Sidney Bell
  • Apparatus and method for coating an electromagnetic coil
    Patent number: 5474799
    Abstract: There is disclosed a method and apparatus for coating an electromagnetic coil, particularly stator coils for an electric motor, with an insulating catalyzed resin material. The catalyzed resin material is a two component material comprising an epoxy resin and a catalyst. The catalyzed resin material is a free flowing liquid at a first temperature and begins to cure rapidly at a second elevated temperature. The stator coils are first heated by supplying current to the stator coils to raise the temperature of the stator coils to the first temperature. The free flowing liquid catalyzed resin material is dispensed through nozzles onto the stator coils as the stator coils and the nozzles move relative to each other. After the liquid catalyzed resin material has been dispensed in a predetermined amount, at predetermined locations, for predetermined times, the catalyzed resin material is allowed to penetrate the stator coils.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: December 12, 1995
    Assignee: Reliance Electric Industrial Company
    Inventors: James L. Thigpen, Walter G. Stiffler, James B. Keys, David T. McKinney, Sidney Bell