Tree pruning machine

Details Tree pruning machine Tree pruning machine

A - Human Necessities

01

G

144/34

A01G 23/00 (2006.01) A01G 23/095 (2006.01)

Patent

CA 1248849

ABSTRACT OF THE DISCLOSURE This invention relates to a method of pruning a tree while climbing the standing tree by the drive of a power unit in a tree pruning machine having a body including elevating wheels and a cutting unit carried on the body comprising temporarily stopping the drive of the elevating wheels in a tree climbing direction when sensing the branch of the tree by a sensor of the branch provided at the top of the cutting unit. A tree pruning machine having a body including elevating wheels, a cutting unit carried on said body for driving by an engine the wheels and the cutting unit, comprising a sensor of a branch to be contacted with the top of the cutting unit, and a power interrupting unit for temporarily stopping the drive of the wheels in a tree climbing direction. The drive of the wheels in the tree climbing direction is not merely stopped, but a speed shifting transmission is arranged in the transmission path to the wheels, the transmission is then operated to positively rotate reversely the wheels in the tree descending direction, thereby obtaining the similar effect and advantages. Thus, the top of the cutting unit is prevented from becoming impossible in the pruning work due to the interposition of the top of the cutting unit in the branches, and the impossibility of the climbing of the pruning machine by its own force can be prevented.

487176

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