Patents by Inventor John McGrew

John McGrew 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).

  • Apparatus for guiding a vehicle pulling an implement including trench forming and following means
    Patent number: 4484647
    Abstract: An apparatus (20) for guiding a vehicle (26) along a pre-determined path. The apparatus (20) includes a reversible electric motor (40) and mechanical linkage (42) for interconnecting the motor (40) to the steering mechanism. A carriage (22) is removably attached to the vehicle (26) or implement (24) being pulled thereby. The carriage (22) supports a trench forming apparatus and a wheel apparatus for following a precut trench. The apparatus (20) includes an actuator (32) for raising and lowering the wheel apparatus and a universal joint (31) to enable the wheel apparatus to move from side to side and vertically, whereby the wheel apparatus can remain in the precut trench should the vehicle (26) veer from the path of the precut trench.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: November 27, 1984
    Inventor: John McGrew