Patents by Inventor Masahiro Akizuki

Masahiro Akizuki 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 insulator
    Patent number: 6613985
    Abstract: A suspension insulator having a shed including an upper surface and an under surface has a pin fitting arranged at its center portion and projected from the under surface and a plurality of circular ribs arranged around the pin fitting in a concentric manner. In a first aspect of the invention, a resistance zone having a surface resistance (1 cm×1 cm) of not greater than 4 M&OHgr; and arranged on the under surface at an inner portion continuing from the pin fitting and a conductive zone arranged on the under surface at an outer peripheral portion of the resistance zone. In a second aspect of the invention, a resistance zone arranged on the under surface at an inner portion continuing from the pin fitting and existing between the pin fitting and an inner root portion of the rib.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: September 2, 2003
    Assignee: NGK Insulators, Ltd.
    Inventors: Takashi Irie, Masahiro Akizuki, Shigeru Ogawa, Kenji Sato
  • Suspension insulator
    Publication number: 20020060089
    Abstract: A suspension insulator having a shed including an upper surface and an under surface has a pin fitting arranged at its center portion and projected from the under surface and a plurality of circular ribs arranged around the pin fitting in a concentric manner. In a first aspect of the invention, a resistance zone having a surface resistance (1 cm×1 cm) of not greater than 4 M&OHgr; and arranged on the under surface at an inner portion continuing from the pin fitting and a conductive zone arranged on the under surface at an outer peripheral portion of the resistance zone. In a second aspect of the invention, a resistance zone arranged on the under surface at an inner portion continuing from the pin fitting and existing between the pin fitting and an inner root portion of the rib.
    Type: Application
    Filed: August 28, 2001
    Publication date: May 23, 2002
    Inventors: Takashi Irie, Masahiro Akizuki, Shigeru Ogawa, Kenji Sato