Tree jack

Details Tree jack Tree jack

2006-01-30

2008-08-26

Self, Shelley M. (Department: 3725)

Woodworking

Special-work machine

Combined

C144S024120, C037S302000

Reexamination Certificate

active

07415998

ABSTRACT:
A novel lifting tool for lifting rooted trees and the like from the ground. There is: at least one main boom; at least one outrigger coupled to a first end of the main boom; at least one mounting member coupled to a second end of the main boom, the mounting member adapted to couple the main boom to a lifting force machine; and at least one set of tongs coupled to the main boom, the tongs adapted to clamp a tree or the like to be lifted around at least a portion of the periphery of the tree or the like, and lift the tree or the like when the main boom is lifted. The tongs are located along the main boom at a position to multiply the force input by the lifting force machine. In the preferred embodiment, the lifting force machine is subsumed by a skid loader.

REFERENCES:
patent: 3802663 (1974-04-01), Widegren
patent: 4144918 (1979-03-01), Hallstrom
patent: D264213 (1982-05-01), Hedblom
patent: 4332093 (1982-06-01), Berthollet
patent: 4481989 (1984-11-01), Peters
patent: 4494325 (1985-01-01), Berthollet
patent: 4606694 (1986-08-01), Meisel et al.
patent: 5479731 (1996-01-01), Widegren
patent: 5671788 (1997-09-01), Rewis
patent: 5829497 (1998-11-01), Maroney
patent: 6010294 (2000-01-01), Lyddon

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