Patents by Inventor Andrew P. Redman

Andrew P. Redman 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).

  • Tree shear head and controls therefor
    Patent number: 4244405
    Abstract: A tree shear head includes a shear, a grapple tong and an accumulator tong which are positioned by respective double-acting hydraulic actuators controlled by selectively actuatable solenoid-operated valves such as to place the shear head either in a non-accumulate mode wherein both tongs operate concurrently to grasp and release trees one-by-one or an accumulate mode wherein the tongs are individually operated in a sequence resulting in the accumulation of a plurality of cut trees.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: January 13, 1981
    Assignee: Deere & Company
    Inventors: Eugene S. Zirker, Andrew P. Redman, Victor C. Pierrot, Alvin L. Menzel, Lynn E. Kurt