| 摘要 |
A light weight treejack suitable for use in the woods at a tree felling site to harvest firewood, pulpwood, and the like, with a chain saw is easy to carry and set up by a single person. A bowed first legpiece is coupled at the top to a straight second legpiece comprising a hollow U-shaped pipe with an internally journalled threaded member rotatable with an upper manually operated handle to move a mating threaded rider up and down the pipe. The trees are supported by a chain about the trunk adjustable in height by the jack at a desired position along the trunk with attached branches on its treetop side aiding the jack to support the tree trunk at a comfortable level for using a chain saw without the danger of turning.
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