Woodworking – Special-work machine – Combined
Patent
1975-06-04
1976-06-01
Simpson, Othell M.
Woodworking
Special-work machine
Combined
144 2Z, 144309AC, A01G 2308
Patent
active
039601900
ABSTRACT:
An improved apparatus for processing sheared trees is provided, as well as the harvesting apparatus for uses therein. The harvester is of the type having a gripping means disposed adjacent the forward end of the apparatus and a shear and delimber longitudinally movable relative to the boom. The shear and delimber are initially positioned adjacent each other and during the first rearward delimbing stroke, the delimber moves rearward relative to the shear. At the end of the delimbing stroke, the shear is activated to sever a first bolt, then a greater pressure is applied to the delimber blades so that they are able to grip the remaining trunk for the return stroke, during which the delimber moves forward relative to the shear. Thus, at the end of the return stroke the delimber and shear have returned to their initial positions and the delimbed portion of the remaining trunk extends a sufficient distance forwardly of the shear to be clamped by the gripping means. The pressure on the delimbing blades is reduced to the regular delimbing pressure, and the harvester is then in a position to perform a second delimbing stroke, followed by a second return stroke, and if necessary, a third set of strokes. Thus, it is possible with the method and harvester provided herein to quickly and efficiently delimb a tree trunk of any length with only one shear and delimber assembly.
REFERENCES:
patent: 3461928 (1969-08-01), Siiro
patent: 3487864 (1970-01-01), Larson et al.
patent: 3623521 (1971-11-01), Sheilds
patent: 3643711 (1972-02-01), Puna
patent: 3721280 (1973-03-01), French
patent: 3731719 (1973-05-01), Pierrot et al.
patent: 3889729 (1975-06-01), Pinomaki
Bray W. D.
Eaton Yale Ltd.
Simpson Othell M.
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