Patents by Inventor Kiyohiko Sano

Kiyohiko Sano 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).

  • Submersible motor using a water-tight wire as the primary winding
    Patent number: 4749894
    Abstract: A submersible motor having a primary winding made of a water-tight wire has an improved life characteristic. The water-tight wire is made of a conductor and three layers formed on the conductor. The three layers are a heat-resistant enamel layer, a main insulating layer and an outer protective layer. The main insulating layer is composed of crosslinked polyethylene or a polypropylene. The outer protective layer is composed of a polyvinyl chloride composition having as a base material a polyvinyl chloride having a number average polymerization degree of 2000 or higher.
    Type: Grant
    Filed: November 18, 1986
    Date of Patent: June 7, 1988
    Assignee: Ebara Corporation
    Inventors: Minoru Iwata, Kiyohiko Sano