Patents by Inventor Kenji Sakanishi

Kenji Sakanishi 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).

  • Suspension insulators
    Patent number: 4140871
    Abstract: A suspension insulator having an improved direct current withstand voltage against contamination is provided. The insulator can be obtained by limiting both of the ratio of the surface leakage distance to the shed diameter, and the rib factor to specifically limited values in the ordinary suspension insulator mainly comprising a disk-shaped shed made of an insulating material, a metal cap and a metal pin, said shed being provided at its lower surface with a plurality of ribs arranged concentrically.
    Type: Grant
    Filed: September 22, 1977
    Date of Patent: February 20, 1979
    Assignee: NGK Insulators Ltd.
    Inventors: Katsuhiko Naito, Kenji Sakanishi, Masanori Ito