Patents by Inventor James Alfred Tomlinson

James Alfred Tomlinson 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: 6478094
    Abstract: A three point tractor hitch permitting an implement to be attached or detached by an operator without leaving the tractor seat. The upper hitch arm includes a linear actuator with a hand grip and a hand operated switch controlling extension and contraction of the upper arm. A latching mechanism and a hand operated latch release are mounted on the upper arm facilitating attachment and release of the upper arm to an upper attaching pin of an implement hitch mast. One of the two lower arms of the hitch can be shifted laterally by a hydraulically actuated cylinder.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: November 12, 2002
    Inventors: Frank David Alexander, James Alfred Tomlinson
  • Publication number: 20020144829
    Abstract: A redesigned three point tractor hitch system engageable and disengageable by an operator without leaving the tractor seat. This comprises eliminating the present used fish eye, ball joint ends of the two lower arms and the middle upper arm and replacing with extremities that can be positioned, attached and locked from the tractor seat. The two lower arm extremities have a fixed open jaw design that attaches to the implement studs from underneath and are locked in position by extending the shaft of a hydraulic cylinder over the studs and through the center of the jaw. The upper arm is attached by a fixed and moveable jaw design that closes and latches when pressure is applied against it from the pin that is mounted in the center mask of the implement. The upper jaw is carried by a hydraulic cylinder that aids in attaching, plus controls the fore and aft movement of the implement.
    Type: Application
    Filed: April 10, 2001
    Publication date: October 10, 2002
    Inventors: Frank David Alexander, James Alfred Tomlinson