MANITOU ITALIA S.R.L.

A method for controlling the rotation speed of a motor that includes the steps of preparing a first function which puts in relation the flow rate delivered by a pump with the pump rotation speed, preparing a second function which puts in relation a flow rate delivered by a flow rate control valve with a level of the control signal received, detecting the presence of control signals and the level of each control signal, using the second function, calculating the flow rate delivered by each flow rate control valve as a function of the level of the control signal received, calculating a total required flow rate, as the sum of the flow rates delivered by each flow rate control valve, using the first function, calculating a required rotation speed of the pump and adjusting the speed of rotation of the motor.

A process for checking the safety of a self-propelled operating machine equipped with an electrical system and including the steps of automatically checking whether in the electrical system there is a voltage equal to or greater than a predetermined risk threshold and if there is a voltage in the electrical system equal to or greater than the risk threshold, emitting a warning signal. A self-propelled operating machine is equipped with an electrical system and includes checking means designed to detect in the electrical system the presence of an electrical voltage greater than or equal to a predetermined risk threshold and to emit a warning signal following the detection.

Described is self-propelled working machine ( 1 ) provided with organ ( 10 ) for moving a load and equipped with a safety system designed to prevent a risk of instability and comprising means ( 3 ) for detecting a position and a weight of the load and further comprising a processing unit ( 2 ) connected to said detection means ( 3 ) and in turn comprising: a checking module ( 21 ) configured for comparing the weight of the load with a reference value, selected on the basis of a position of the load; and a limiting module ( 22 ) configured for producing a limiting signal suitable for limiting the movement of the movement organ ( 10 ), following the comparison performed by the checking module. The reference value is independent of an angular position of the movement organ ( 10 ).

Described is a self-propelled working machine ( 1 ) provided with an organ ( 10 ) for moving a load which comprises an activation actuator ( 14, 16 ). The force applied by the actuator ( 14, 16 ) is constrained by a predetermined maximum threshold.

Described is a rotary telehandler ( 1 ) comprising a carriage ( 10 ) movable on wheels, which mounts a tower ( 11 ), which in turn mounts a drivers cab ( 12 ) and an operating arm. The telehandler ( 1 ) is equipped with the following free paths of ascent and descent: a first path, defined by a first position of the tower ( 11 ), wherein it has an axis parallel to that of the carriage ( 10 ) and comprises a door ( 15 ) of the cab ( 12 ), a handle ( 17 ) on which an operator can grasp and a ladder ( 101, 104 ) made on a side wall of the carriage ( 10 ); a second path, defined by an angled position of the tower ( 11 ), wherein it is oblique or transversal to the axis of the carriage ( 10 ), with a front of the cab ( 12 ) facing towards the inside of the carriage ( 10 ), the second path comprising the door ( 15 ), a first handle ( 16 ) mounted at a first side of the door ( 15 ), a treadable surface ( 105, 106 ) of the carriage ( 10 ) and a further ladder ( 102, 103 ) made in a side of the carriage ( 10 ); and a third path, defined by a further angled position of the tower ( 11 ), wherein it is oblique or transversal to the axis of the carriage ( 10 ), with the front of the cab ( 12 ) facing towards the outside of the carriage ( 10 ), the third path comprising the door ( 15 ), a second handle ( 17 ) mounted at a second side of the door ( 15 ), a treadable surface ( 103, 102 ) of the carriage ( 10 ) and a ladder ( 104, 103 ) made in a further side of the carriage ( 10 ). The first, second and third paths are free of obstacles for the free passage of an operator.

Described is a telescopic lifting arm ( 1 ) for self-propelled operating machines ( 10 ) comprising three tubular elements ( 21, 22, 23, 24, 25, 26 ), with a decreasing cross-section and telescopically connected to each other to define a supporting structure, designed to move between a retracted configuration wherein said tubular elements ( 21, 22, 23, 24, 25, 26 ) are inserted one in the other and an elongated configuration wherein two tubular elements are partly extracted. The arm ( 1 ) comprises actuator means ( 5 ) associated with the tubular elements ( 21, 22, 23, 24, 25, 26 ) and configured for actuating two tubular elements ( 21, 22, 23, 24 25, 26 ) for pulling them out independently from one other and with different speeds.