Patents by Inventor David Charles Princz

David Charles Princz 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 feeding control for a tree handling device
    Patent number: 7874327
    Abstract: In a tree handling device, where the tree is fed longitudinally through at least three drive wheels driven by a fixed-displacement hydraulic pump, feeding commences with all drive wheels simultaneously propelling the tree longitudinally through the knife arms and frame. During feeding, once the approximate maximum feeding speed of the drive wheels is achieved, one of the drive wheels is shifted to a free-wheeling condition, allowing the maximum feed speed to increase.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: January 25, 2011
    Assignee: Tigercat Industries Inc.
    Inventors: Duane Anthony Barlow, David Charles Princz