Patents by Inventor Edward H. Duncan

Edward H. Duncan 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).

  • Stove, heater and lantern
    Patent number: 6302096
    Abstract: A kit, from which a stove, a heater, and a lantern can be assembled from a minimum of components. Toward accomplishing this, components of the kit can be used in the assembly of more than one of the options stove, heater, and lantern. Thus, a straight valve/aspirator unit of the kit serves for all three options, and a burner and elbow serves in both of the options stove and heater.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: October 16, 2001
    Inventor: Edward H. Duncan
  • Toggle bolt installation, hardware, and manufacture
    Patent number: 4883398
    Abstract: In an installation method according to the invention, one pulls the wings of a toggle bolt into contact with the inner surface of a wall continuously during tightening of the bolt, this being in contrast with previous practice where the finger nails eventually must be removed, and thus the pulling action eliminated, in order to prevent locking of the fingernails between the wall and bolt head. An apparatus according to the invention comprises means for exerting a pull on the bolt of a toggle bolt, for maintaining the contact of the wings with the inner surface of a wall until the bolt has been tightened. The invention also provides a special manufacturing method for a particular apparatus of the invention.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: November 28, 1989
    Assignee: Daniel A. Sullivan, Jr.
    Inventor: Edward H. Duncan