Grapple saw with positive pressure grapple arms

Details Grapple saw with positive pressure grapple arms Grapple saw with positive pressure grapple arms

1992-08-13

1993-12-07

Bray, W. Donald

Woodworking

Process

Timber harvesting or processing

144 3D, 144 34R, A01G 2308

Patent

active

052675947

ABSTRACT:
A grapple saw is provided with positive pressure grapple arms to securely hold trees during felling. The grapple saw has a frame for receiving a tree to be felled. A grapple arm mounted on the frame pivots to hold the tree against the frame as it is severed by a saw. Positive pressure is provided to the clamping arm during the severing operation to prevent movement of the tree.

REFERENCES:
patent: 3902538 (1975-09-01), Muirhead
patent: 3994325 (1976-11-01), Cryder et al.
patent: 4039010 (1977-08-01), Tucek
patent: 4083291 (1978-04-01), Larsson
patent: 4161200 (1979-07-01), Albright
patent: 4219059 (1980-08-01), Albright
patent: 4546805 (1985-10-01), Jahr et al.

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