Patents Assigned to Muirhead Machinery Ltd.
  • Tree cutting apparatus
    Patent number: 3970125
    Abstract: Apparatus for cutting through a standing tree near the base by advancing a power driven blade transversely through the tree trunk. The blade has a leading edge along which a motor driven cutting element is journalled and the element is a shaft provided with helical flutes and wood chipping edges. A tree tilting mechanism on the apparatus is operable to keep the kerf open behind the advancing element and to fall the severed tree to one side of the path of travel of the apparatus.
    Type: Grant
    Filed: July 2, 1973
    Date of Patent: July 20, 1976
    Assignee: Muirhead Machinery Ltd.
    Inventors: Aubrey S. Muirhead, John Martin, Patrick J. Martin, Ross H. Rigler