Tree pruning apparatus

Details Tree pruning apparatus Tree pruning apparatus

1994-05-03

1995-02-21

Bray, W. Donald

Woodworking

Special-work machine

144 3D, 144 34R, 144338, 144343, A01G 2308, B77L 100

Patent

active

053907159

ABSTRACT:
An apparatus for cutting and pruning trees is attachable to the end of the outermost boom arm of a vehicle mounted boom assembly. The apparatus includes a grapple and saw assembly comprising a grapple and saw assembly frame having a grapple is mounted thereon. A first positioning hydraulic motor is interconnected with the grapple and saw assembly to the outermost boom arm for pivoting the grapple and saw assembly about a first axis. A second positioning hydraulic motor is disposed between and interconnected with the grapple and saw assembly and first positioning motor for pivoting the grapple and saw assembly through an arc of 360.degree. about an axis disposed substantially normal to said first pivotal axis. A saw assembly is mounted on the grapple and saw assembly frame by a third positioning hydraulic motor for pivoting the saw assembly through an arc of 360.degree. about an axis disposed substantially normal to said first and second pivotal axes.

REFERENCES:
patent: 3389728 (1968-06-01), Galis
patent: 3451448 (1969-06-01), Michenor
patent: 3604479 (1971-09-01), Jordan
patent: 3885610 (1975-05-01), Foslund et al.
patent: 3991799 (1976-11-01), Albright
patent: 4063359 (1979-12-01), Luscombe
patent: 4269241 (1981-05-01), Hickman
patent: 4416311 (1983-11-01), Gemmell-Murdoch
patent: 4522239 (1985-06-01), Gaitten
patent: 4569379 (1986-02-01), Gemmell-Murdoch
patent: 4981163 (1991-01-01), Westlund
patent: 5201350 (1993-04-01), Milbourn

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