Patents by Inventor Douglas Robert Craig

Douglas Robert Craig 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).

  • Link disconnect box for an electrical distribution network protector
    Patent number: 9006595
    Abstract: A link disconnect box enables easy field retrofitting of network protectors. The link disconnect box has an outer casing that defines a cavity with a front face opening and top and bottom bus bar openings. Top and bottom terminals seal the top and bottom bus bar openings. The bottom terminal is configured to connect to an existing terminal of the network protector. A removable face plate seals shut the front face opening. Top and bottom bus bars electrically connect to the top and bottom terminals, extending through the respective top and bottom bus bar openings towards each other, with an air gap between them within the cavity. An electrical link, which can be bolted closed, connects and disconnects the top and bottom bus bars by electrically bridging the air gap.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: April 14, 2015
    Assignee: Richards Manufacturing Company
    Inventor: Douglas Robert Craig
  • LINK DISCONNECT BOX FOR AN ELECTRICAL DISTRIBUTION NETWORK PROTECTOR
    Publication number: 20130288527
    Abstract: A link disconnect box enables easy field retrofitting of network protectors. The link disconnect box has an outer casing that defines a cavity with a front face opening and top and bottom bus bar openings. Top and bottom terminals seal the top and bottom bus bar openings. The bottom terminal is configured to connect to an existing terminal of the network protector. A removable face plate seals shut the front face opening. Top and bottom bus bars electrically connect to the top and bottom terminals, extending through the respective top and bottom bus bar openings towards each other, with an air gap between them within the cavity. An electrical link, which can be bolted closed, connects and disconnects the top and bottom bus bars by electrically bridging the air gap.
    Type: Application
    Filed: January 25, 2013
    Publication date: October 31, 2013
    Applicant: RICHARDS MFG. CO.
    Inventor: Douglas Robert Craig