Patents Assigned to Firma Elektro-Diesel
  • Method and apparatus for severing tree roots and felling trees
    Patent number: 4141398
    Abstract: A standing tree is gripped by a gripping device, lifted and separated from its root system by a cutting device acting in parallel with the longitudinal direction of the tree, the roots being separated from its trunk accelerating the cutting device vigorously relative to the gripping device in the direction away from it, while storing a substantial amount of kinetic energy in the considerable mass cutting parts which in conjunction with the mass of inertia of the tree is used for the cutting of the roots of the tree.
    Type: Grant
    Filed: November 21, 1975
    Date of Patent: February 27, 1979
    Assignee: Firma Elektro-Diesel
    Inventors: Lars H. Widegren, Tage O. Keskitalo