| 摘要 |
A tree jack directional frame system is provided for use in directing the path of travel of a tree that is to be felled. It consists of an open frame of substantially equilateral configuration, having spaced support members positioned between the sides to prevent the sides from bowing in. A hydraulic or screw type jack is provided between two parallel support members and it is used for extending a slidable rod positioned within a housing and having an arcuate member or bar on one end thereof for engaging and biting into a tree intermediate the height of the tree. The opposite end of the rod is coupled to the hydraulic jack. One side of the frame is positioned against the ground. Pressure is applied by the hydraulic jack to the rod, which, in turn, applies pressure to the tree to cause it to fall in the desired direction when being felled.
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