초록 ▼

A machine for extracting an elongate work piece from a medium in which it is imbedded. The machine includes a vertical gripping plate in opposed gripping relating with an eccentrically pivoted gripper. These gripping elements are carried on a rigid frame adapted for attachment to the three point hit

A machine for extracting an elongate work piece from a medium in which it is imbedded. The machine includes a vertical gripping plate in opposed gripping relating with an eccentrically pivoted gripper. These gripping elements are carried on a rigid frame adapted for attachment to the three point hitch lifting mechanism found on tractors. When the work piece is gripped between the gripping elements, lifting of the frame by means of the lifting mechanism of the tractor, will extract the work piece. Auxiliary lifting force may be provided with optional fluid power operated cylinders. Linkages may optionally be provided to remotely move the pivoted gripper into and out of gripping relation. The linkages may be operated manually or with a hydraulic or other power operated cylinder.

대표청구항 ▼

A machine for extracting an elongate work piece from a medium in which it is imbedded, said machine being adapted to be attached to and operated by a conventional three point hitch mechanism of a tractor, said three point hitch mechanism comprising a freely pivotable center link and two pivot links

A machine for extracting an elongate work piece from a medium in which it is imbedded, said machine being adapted to be attached to and operated by a conventional three point hitch mechanism of a tractor, said three point hitch mechanism comprising a freely pivotable center link and two pivot links which may be operated in reciprocating vertical motion under power by lifting links, said machine comprising a substantially rigid frame, means for securing said frame to said three point hitch mechanism for reciprocating vertical motion in response to corresponding vertical motion of said pivot links, adjustable means for connecting said frame to said center link whereby said center link will remain substantially parallel to said pivot links and said frame will remain substantially vertical during vertical motion of said pivot links and said frame, means on said frame for engaging a work piece to be extracted, said means comprising a vertical gripping plate having gripping teeth for engaging the work piece, said vertical gripping and each of the gripping teeth on said gripping plate having a substantially flat top surface, and the included angle between the flat top surface of at least one of said teeth and said vertical flat front surface of said gripping plate being substantially less than ninety (90) degrees.