Patent ID: 7987603
Filing Date: 2011-08-02
Classification: A01G

Abstract:
1. A cutting tool of the scissor type, comprising: a pruning head having a fixed counter-blade and a rotating blade that has an integral extension and that rotates around a pin to cooperate with said counter-blade to cut an object between said rotating blade and said counter-blade, a return spring with which said rotating blade is drawn in an open position, plurality of pruning head sheaves, and a first cord or belt sliding on said plurality of sheaves and connected to the extension of said rotating blade; an extension pole; two side shells connecting said pruning head to said extension pole; trolley connected to said first cord, moveably disposed between said side shells, and carrying first and second trolley sheaves; a fixed sheave disposed between said side shells with which said trolley sheaves form a tackle; wherein said extension pole comprises an internal pipe and an external pipe; a second cord or belt slidably disposed in said internal pipe; wherein said internal pipe has a first groove and a second groove which are longitudinal along the whole length of said internal pipe and shaped such that the second cord or belt is not obstructed when sliding within said inner pipe; wherein said external pipe has a groove which is longitudinal along the whole length of said external pipe, is shaped such that it slides in said first groove of the internal pipe to permit relative sliding between said internal and external pipes and increase the length of the extension pole, and is shaped such that the cord or belt is not obstructed when sliding; wherein the groove of said external pipe and the first groove of said inner pipe each define at least partially open external passages, and said second groove of said internal pipe and said external pipe define an internal duct; a locking system disposed on said extension pole for preventing relative sliding between said external pipe and said internal pipe and shaped in such a way as not to occlude the grooves of said external and internal pipes; a sliding cap closing a lower end of said internal pipe and shaped in such a way as not to occlude the the smaller groove of said internal pipe; wherein said sliding cap has a through-hole through which the second cord or belt exits from the lower end of the internal pipe and a groove shaped to facilitate the sliding of the second cord or belt such that said second cord or belt passes in and out of said internal and external pipes without interfering with the relative sliding of said pipes: an operating handle slidably disposed on said external pipe; wherein the second cord or belt is connected to the operating handle; wherein said second cord or belt extends along the groove of the external pipe; wherein said second cord or belt passes below the locking system and continues along the first groove of the internal pipe; wherein said second cord or belt continues up through said shells; wherein said second cord or belt continues around the first trolley sheave; wherein said second cord or belt continues down through said shells and continues around the fixed lower sheave; wherein said second cord or belt continues up through said shells and continues around the second trolley sheave; wherein said second cord or belt continues down inside the internal pipe; wherein said second cord or belt continues down through the hole of the internal sliding cap closing the lower end of the internal pipe, wherein said second cord or belt continues up through the groove of said internal sliding cap; wherein said second cord or belt continues through the internal duct and is fixed on the locking system.