Tree pruner

Details Tree pruner Tree pruner

1987-08-17

1988-11-01

Bray, W. Donald

Woodworking

Special-work machine

144 3D, 144343, A01G 2302, B27L 100

Patent

active

047812281

ABSTRACT:
A mechanized tree pruner is mounted on the boom of a prime mover so the pruning head can be moved up and down a standing tree. The head is comprised of a main frame on which is mounted two delimbing stations each of which has a pair of movable delimbing knife chains mounted on grapple type arms. Below each station is a positioning means for orienting the head with respect to the standing tree. When the arms are closed causing the knife chains to encircle the tree, upward movement of the pruning head will then result in all limbs and branches being severed as they are impacted by the knife chains.

REFERENCES:
patent: 2948311 (1960-08-01), McCollum
patent: 3371692 (1968-03-01), Larson et al.
patent: 3385332 (1968-05-01), Otterbach et al.
patent: 3643708 (1972-02-01), Lindblom
patent: 3797539 (1974-03-01), Moser
patent: 3981336 (1976-09-01), Levesque
patent: 4004622 (1977-01-01), Hamilton
patent: 4049032 (1977-09-01), Oldenburg
CSIRO Division of Forest Research in Australia, Annual Report (1976-1977), pp. 15, 16 and 17.

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