Patents Assigned to Nakasu Denki Kabushikigaisha
  • Washer for securing electrical conduction at connections
    Patent number: 6368038
    Abstract: Conductive devices and tools to provide electrical conduction with a generally planar conductor which is covered with an insulation substance such as paint, rust or dust, by scraping a portion of the conductor and removing the insulation substance. A conductive device includes a conductive metal serration means and a tool utilizes such a serration device. Such a serration device can be a bolt device, nut device or washer device, or washer-incorporated threaded device. A connector device is also disclosed to provide electrical conduction between a conductor and a conductor plate covered with an insulation substance.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: April 9, 2002
    Assignee: Nakasu Denki Kabushikigaisha
    Inventor: Tsuyoshi Uno
  • Abrasion tool for improved electrical conduction of connections
    Patent number: 6338599
    Abstract: Conductive devices and tools to provide electrical conduction with a generally planar conductor which is covered with an insulation substance such as paint, rust or dust, by scraping a portion of the conductor and removing the insulation substance. A conductive device includes a conductive metal serration means and a tool utilizes such a serration device. Such a serration device can be a bolt device, nut device or washer device, or washer-incorporated threaded device. A connector device is also disclosed to provide electrical conduction between a conductor and a conductor plate covered with an insulation substance.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: January 15, 2002
    Assignee: Nakasu Denki Kabushikigaisha
    Inventor: Tsuyoshi Uno
  • Insert for securing electrical conduction at connectors
    Patent number: 6290443
    Abstract: Conductive devices and tools to provide electrical conduction with a generally planar conductor which is covered with an insulation substance such as paint, rust or dust, by scraping a portion of the conductor and removing the insulation substance. A conductive device includes a conductive metal serration means and a tool utilizes such a serration device. Such a serration device can be a bolt device, nut device or washer device, or washer-incorporated threaded device. A connector device is also disclosed to provide electrical conduction between a conductor and a conductor plate covered with an insulation substance.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: September 18, 2001
    Assignee: Nakasu Denki Kabushikigaisha
    Inventor: Tsuyoshi Uno
  • Device and tool for securing electrical conduction at connections
    Patent number: 6129492
    Abstract: Conductive devices and tools to provide electrical conduction with a generally planar conductor which is covered with an insulation substance such as paint, rust or dust, by scraping a portion of the conductor and removing the insulation substance. A conductive device includes a conductive metal serration means and a tool utilizes such a serration device. Such a serration device can be a bolt device, nut device or washer device, or washer-incorporated threaded device. A connector device is also disclosed to provide electrical conduction between a conductor and a conductor plate covered with an insulation substance.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: October 10, 2000
    Assignee: Nakasu Denki Kabushikigaisha
    Inventor: Tsuyoshi Uno