Tree harvester and buncher

Details Tree harvester and buncher Tree harvester and buncher

1977-06-02

1979-07-17

Spruill, Robert L.

Woodworking

Special-work machine

Tree felling

144 3D, A01G 2308

Patent

active

041612000

ABSTRACT:
An improved harvester and buncher of the horizontally articulated type having base and upper structure such as described in my prior invention of Apparatus and Method of Felling and Bunching Trees, U.S. Pat. No. 3,991,799. Base structure has been reshaped forwardly as a three dimensional wedge for the removal of fallen trees, debris and snow from the cutting path of a chain saw mounted therein and from around a tree, and enclosed for better protection of the chain saw and hydraulic apparatus therefor. The three dimensional wedge defines a center front recess for receiving a tree, and a contact point above the cutting line of the chain saw for limiting tree movement relative to the base. An annular ball bearing connects the invention to a power train while providing for side tilt and pickup, and the center hole of the annular ball bearing allows entrance of hydraulic and control lines where the relative movement is axial. A release mechanism, actuated by the closing of tree grapples, permit the invention to "float" around the annular ball bearing to conform to tree position rather than forcing the tree to conform to the invention. Knives are mounted behind tree grapples to prevent tree slippage when cut. The tree contact points are the back of tree receiving recess above chain saw in the base and the rod end of an hydraulic cylinder in the upper structure which automatically locks to prevent tree movement and signals operator to begin cut with automatic coordination between chain saw, grapples and pivoting on base structure.

REFERENCES:
patent: 3140736 (1964-07-01), Propst
patent: 3269436 (1966-08-01), Moore
patent: 3643712 (1972-02-01), Doel et al.
patent: 3991799 (1976-11-01), Albright
patent: 4013106 (1977-03-01), Albright

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