Patent ID: 6394156
Filing Date: 2002-05-28
Classification: A01G,Y10S

Abstract:
A method for cutting tops of trees in the vicinity of an electrical wire of a power line, comprising:a) providing a helicopter having a topping saw suspended from the helicopter by a suspending means, said topping saw comprising at least two cutting blades which are rotatable in a horizontal plane when the topping saw is suspended from the helicopter, b) suspending a sighting means from said helicopter, said sighting means being arranged at an angle to the horizontal plane, the angle of the sighting means corresponding to an angle of a desired cutting line of the tree tops in a direction away from the power line, c) locating the sighting means a distance from said cutting blades based on a distance from said power line of a tree to be cut and a height of cutting of the tree at that distance, and d) cutting the tops of the trees in the vicinity of the electrical wire of the power line by flying the helicopter in a direction parallel to the electrical line while directing the sighting device towards the electrical wire.