Patents Assigned to Nursery Implements, Inc.
  • Nursery stocks digging machine
    Patent number: 3977099
    Abstract: The digging machine according to the present invention includes pairs of spherical blades which are rotated beneath a plant for forming a root ball and removing the plant. By operation of a pair of parallelogram linkages, the spherical blades are rotated beneath the surface of the ground, and spherical blade covers are moved downwardly to encompass the upper part of a root ball for convenient removal thereof.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: August 31, 1976
    Assignee: Nursery Implements, Inc.
    Inventor: John E. Stewart