Woodworking – Special-work machine – Tree felling
Patent
1978-05-31
1980-08-26
Bray, W. Donald
Woodworking
Special-work machine
Tree felling
303795, 30381, 144 3D, A01G 2308
Patent
active
042190592
ABSTRACT:
An improved tree harvester and buncher of the horizontally articulated type with stump gripper, as described in my U.S. Pat. Nos. 3,991,799 and 3,946,775, and 4,013,106, wherein the tree cutting device is lowered to reduce stumpage waste and the actuating motor thereof is raised to prevent trash interference therewith. Also a tree chock is independently pivoted to follow the the tree cutting device into a tree cut as the cut is opened by horizontal articulation of the harvester and buncher to chock a tree against vertical slippage in tree supporting grapples and the stump gripper on the stump for preventing the cutting device from binding in the cut or being bent therein. Also a stump penetrating member is mounted below the tree cutting device for penetrating the stump, and in cooperation with the stump gripper, assist in preventing movement of the harvester and buncher relative to the stump. And also a power and control system that coordinates the opening of lower tree supporting grapples and the swinging of pivotally mounted upper tree supporting grapples upward and rearward to release a cut tree, when horizontal, to fall on roll bars and drop to the sides and clear of forward movement of the tree harvester and buncher which remains gripping the stump for permitting the harvesting of trees beyond the size that could normally be harvested.
REFERENCES:
patent: 3042088 (1962-07-01), Filon et al.
patent: 3140736 (1964-07-01), Propst
patent: 3604479 (1971-09-01), Jordan
patent: 3726326 (1973-04-01), Coleman
patent: 3848648 (1974-11-01), Dika et al.
patent: 3991799 (1976-11-01), Albright
Bray W. Donald
Lake, Jr. James B.
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