초록 ▼

A tree felling apparatus has a U-shaped base with a pair of laterally spaced arms defining a cutting area for receiving therein a tree to be cut and a chain saw mechanism movable through the cutting area for cutting a tree. The chain saw mechanism includes a saw bar which is tapered inwardly from it

A tree felling apparatus has a U-shaped base with a pair of laterally spaced arms defining a cutting area for receiving therein a tree to be cut and a chain saw mechanism movable through the cutting area for cutting a tree. The chain saw mechanism includes a saw bar which is tapered inwardly from its proximal end to its distal end for even distribution of bending stress across the saw bar.

대표청구항 ▼

An apparatus for cutting logs comprising a base and saw means pivotally mounted to said base, said saw means having a saw bar having a proximal end about which said saw means pivots, a distal end which is remote from said proximal end, and an endless saw chain mounted to said saw bar, and means for

An apparatus for cutting logs comprising a base and saw means pivotally mounted to said base, said saw means having a saw bar having a proximal end about which said saw means pivots, a distal end which is remote from said proximal end, and an endless saw chain mounted to said saw bar, and means for driving said saw chain in cutting movement along said saw bar, said saw bar being of a decreasing transverse dimension in the direction away from said proximal end toward said distal end for distributing bending stress evenly across said saw bar.