Telescopic extensible rod for agricultural tools for picking fruit from trees or for cutting off branches of trees

A telescopic extensible rod particularly suited to be used as extension rod for agricultural tools for picking fruits from trees or for cutting branches of trees, the said rod having a lower end to be connected to the delivery of a source of fluid under pressure, as well as an upper end to which an actuator can be associated, said rod including:

• at least a first tubular element, inside which there is sliding at least a second tubular element, the said pneumatic actuator being associated to the upper end of the second tubular element, that is always outside the said first tubular element;
• at least a coupling for joining the said first tubular element and second tubular element, the said coupling being designed to removably lock the reciprocal sliding of the tubular elements in any position comprised between two extreme configurations, respectively a minimum extension configuration and a maximum extension configuration for the same rod:
• at least two coaxial pipes, namely a first pipe inside which there is sliding at least a second pipe, these pipes being located inside said tubular elements, so that the lower end of the said first pipe, that is bound to the said lower end of the said first tubular element, can be connected to a delivery coming from a source of fluid under pressure, and so that the said pneumatic actuator can be connected to the upper end of the second pipe that is bound to the said upper end of the said second tubular element;
• at least a sleeve, partially surrounding the said pipes first and second, the said sleeve being fastened to the remainder of the ends of the said first pipe and designed to keep a fluid-dynamic seal between the said pipes.