Patents by Inventor Dwight D. Boyd

Dwight D. Boyd 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).

  • Expanding tenon clamp
    Patent number: 5260860
    Abstract: A clamp mechanism secures a lighting fixture to a mounting apparatus. A tenon is inserted into the open end of a mounting pole. A radially expandable element, mounted on the tenon, is adjusted to expand radially outwardly to engage the inner surface of the mounting pole. Radial outward expansion of the expandable element is imparted by a threaded bolt which threadedly engages a base of the expandable element. As the base is drawn towards the end face of the tenon, angled legs of the expandable element are cammed outwardly until distal ends of the legs frictionally engage the inner surface of the mounting pole.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: November 9, 1993
    Assignee: Hubbell Incorporated
    Inventors: David L. Jordan, Dwight D. Boyd