Patents by Inventor Masashi Negawa

Masashi Negawa 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).

  • Switchgear
    Patent number: 6433998
    Abstract: A switchgear comprising a cable compartment, a bus conductor compartment for housing bus conductors arranged at the upper portion of a cable compartment with their back faces in alignment and an interrupter compartment disposed at the boundary portion between the bus conductor compartment and the cable compartment to intrude from the front. An upper insulating partition wall is disposed in the upper half portion of the interrupter compartment for defining a partition between the bus conductor compartment and having a penetration hole through which the terminal of the interrupter can pass, and a lower insulating partition wall is disposed in the lower half portion of the interrupter compartment for defining a partition between the cable compartment and having a window through which the terminal of the interrupter can pass.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: August 13, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Arioka, Masashi Negawa
  • Switchgear
    Publication number: 20010005306
    Abstract: A switchgear comprising a cable compartment, a bus conductor compartment for housing bus conductors arranged at the upper portion of a cable compartment with their back faces in alignment and an interrupter compartment disposed at the boundary portion between the bus conductor compartment and the cable compartment to intrude from the front. An upper insulating partition wall is disposed in the upper half portion of the interrupter compartment for defining a partition between the bus conductor compartment and having a penetration hole through which the terminal of the interrupter can pass, and a lower insulating partition wall is disposed in the lower half portion of the interrupter compartment for defining a partition between the cable compartment and having a window through which the terminal of the interrupter can pass.
    Type: Application
    Filed: January 25, 2001
    Publication date: June 28, 2001
    Inventors: Masahiro Arioka, Masashi Negawa