Patents by Inventor Donald R. Dupras

Donald R. Dupras 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).

  • Patent number: 4784110
    Abstract: The heat exchanger of a gravity flow wall furnace defines a tortuous, mostly vertical path for the combustion gases to improve heat transfer to the room. The gases are directed upwardly in a combustion chamber and then split into two portions and conducted through two radiators having paths which extend downwardly adjacent to but spaced from the chamber and then upwardly again leading to a flue. The chamber and the radiators are oriented edgewise with respect to the wall so that all can fit within the space between a pair of studdings in a conventional stud wall.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: November 15, 1988
    Assignee: Williams Furnace Company
    Inventors: Stanley F. Skafte, Donald R. Dupras
  • Patent number: 4155609
    Abstract: A wall-hung cabinet comprising a body portion fixedly attached to a wall. A door is hingedly mounted to said body portion and equipped to independently store items therein. A foldable work bench extends from the bottom body portion of the cabinet. In one embodiment, the bottom of the cabinet is at approximately table height. In another embodiment the cabinet extends practically to the floor. The top of the cabinet is approximately no higher than the reach of an average person. Thus, the wall-hung cabinet provides an ideal and compact unit for storing and making use of craft and hobby tools and apparatus.
    Type: Grant
    Filed: September 8, 1977
    Date of Patent: May 22, 1979
    Assignee: Williams Furnace Company
    Inventors: Stanley F. Skafte, Donald R. Dupras, Gene Schugart