Woodworking – Special-work machine – Tree felling
Patent
1976-08-06
1978-05-09
Simpson, Othell M.
Woodworking
Special-work machine
Tree felling
37 2R, 144 3D, A01G 2308
Patent
active
040881636
ABSTRACT:
A tree shearing apparatus is provided which cuts virtually all of the wood fibers at an oblique angle thereto thus reducing power requirements by improving the shearing action. Upward compression and/or splitting forces on the trunk are very significantly reduced as compared with the prior art devices and provision is made for a major portion of the compressive forces to be transmitted downwardly to the stump. An increased recovery of usable wood may also be realized by virtue of the use of the present invention. The tree shearing apparatus includes a support means adapted to be positioned adjacent the trunk of a standing tree. The apparatus includes first and second cutter blades each having a cutting edge mounted to the support means, with the cutter blades projecting generally forwardly from the support means. Means are provided for mounting the cutter blades for motion of their cutting edges along curved paths from elevated positions where the cutting edges are spaced from one another to lower positions where the cutting edges are closely adjacent to one another thereby to perform a tree-cutting operation. The apparatus also includes actuating means for effecting the above noted movement of the cutter blades.
REFERENCES:
patent: 3461929 (1969-08-01), Hunger et al.
patent: 3817303 (1974-06-01), Kantola et al.
patent: 3826295 (1974-07-01), Johnson et al.
patent: 3865168 (1975-02-01), McColl
Bray W. D.
Simpson Othell M.
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