Woodworking – Process – Timber harvesting or processing
Patent
1986-03-05
1987-05-05
Bray, W. D.
Woodworking
Process
Timber harvesting or processing
303795, 56336, 144 3D, A01G 2308
Patent
active
046624147
ABSTRACT:
Apparatus is lowered over the top of a tree to sever the tree top and to collect the severed tree for later use in reforestation. The apparatus includes a housing having a conically shaped inner passageway which diverges downwardly to provide a lower opening for guiding the tree upwardly through the downwardly diverging passageway to provide a lower opening for guiding the tree upwardly through the passageway and out the top of the conical housing. In an exemplary embodiment, the cutting assembly includes a movable engaging arm which is propelled in scissor-like movement toward a fixed engaging arm by a fluid cylinder/piston assembly. The inner edges of the arms are shaped to guide the tree toward a cutting blade attached to the inner edge of one of the arms. The tree is moved into cutting engagement with the cutting blade by the closing movement of the movable arm. An extension spring may be utilized to assist in the opening and closing movement of the movable arm by movement of the spring across an overcenter location. In another exemplary embodiment, the cutting blade is pivotally connected to one of the arms and is rotated into cutting engagement with the tree by a separate hydraulic piston/cylinder assembly.
REFERENCES:
patent: 4792 (1846-10-01), Gatherer
patent: 1795392 (1931-03-01), Hardwick
patent: 3507107 (1970-04-01), Harms et al.
patent: 3536113 (1970-10-01), Sutherland
patent: 3576203 (1971-04-01), Cote
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