Patents by Inventor Donald O. Johnson

Donald O. Johnson 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).

  • Publication number: 20020175196
    Abstract: A receiver bracket for mounting to a square or rectangular bumper of a recreational or similar vehicle. The receiver bracket is designed to accept various racks or other accessories of limited weight, with a maximum of about 200 pounds. The receiver bracket is highly symmetrical, allowing mounting of the square tube either below or above the supporting bumper in a horizontal orientation. Alternatively, the receiving bracket can be mounted to the bumper with the square tubing in a vertical orientation.
    Type: Application
    Filed: May 2, 2001
    Publication date: November 28, 2002
    Inventor: Donald O. Johnson
  • Patent number: 6474522
    Abstract: A receiver bracket for mounting to a square or rectangular bumper of a recreational or similar vehicle. The receiver bracket is designed to accept various racks or other accessories of limited weight, with a maximum of about 200 pounds. The receiver bracket is highly symmetrical, allowing mounting of the square tube either below or above the supporting bumper in a horizontal orientation. Alternatively, the receiving bracket can be mounted to the bumper with the square tubing in a vertical orientation.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: November 5, 2002
    Assignee: Polymer Recovery Systems
    Inventor: Donald O. Johnson
  • Patent number: 4361223
    Abstract: A conveyor for moving uniformly spaced-apart cylindrical articles transversely of their polar axes comprises a pair of parallel sawtooth rails, paired lifting and lowering levers on common pivots disposed along the rails in correspondence with each toothed portion of a rail, and cams for sequentially pivoting the lifting levers. The paired sawtooth elements include a stop surface and an inclined surface extending downwardly therefrom in the direction of article movement. The lowering lever is resiliently pivoted to an upper position independently of the lifting lever, and is downwardly pivotable by an article as it rolls down an inclined surface. Pivotation of the lowering lever to upper position permits the lifting lever gravitationally to pivot below an inclined surface.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: November 30, 1982
    Assignee: American Can Company
    Inventor: Donald O. Johnson
  • Patent number: 4212584
    Abstract: An inclined conveyor for lowering uniformly spaced, cylindrical articles comprises a pair of inclined rails, paired pivotal rockers and fingers disposed along the inclined rails, and a pair of drawbars for sequentially pivoting the inclined pairs of rockers and fingers. The paired pivotal rockers and fingers are so cooperably disposed as to define a series of article receiving pockets accommodating controlled gravitational movement of the articles along the rails, as the rockers and fingers are sequentially pivoted by the drawbars.
    Type: Grant
    Filed: October 25, 1978
    Date of Patent: July 15, 1980
    Assignee: American Can Company
    Inventor: Donald O. Johnson
  • Patent number: D245340
    Type: Grant
    Filed: May 19, 1976
    Date of Patent: August 9, 1977
    Assignee: Chas. M. Freidheim Company
    Inventor: Donald O. Johnson