Abstract: The present invention refers to loading crane comprising: an articulated arm, comprising at least one first and one second bodies successively connected in order to form an open kinematic chain, wherein the second body is translatingly and/or rotatably movable with respect to the first body; a hydraulic circuit adapted to convey a working fluid for actuating the articulated arm. Said hydraulic circuit comprises a segment associated to one of the first and second bodies comprising: at least one sliding rigid tube slidingly translatingly connected to the body to which the segment of the hydraulic circuit is associated; at least one stationary tube integrally connected to the body to which the segment of the hydraulic circuit is associated; a flexible tube fluidically interconnecting the sliding rigid tube and the stationary tube.

Abstract: A limited rotation slewing ring crane may include a pedestal, a column rotatively coupled, about a first rotation axis, to the pedestal by a slewing ring rotative coupling, and stops for limiting the relative rotation of the column with respect to the pedestal. The crane may also include a rotative sensor adapted to measure a rotation angle of the column with respect to the pedestal. The rotation sensor may include a tubular body axially extending from the base of the column, a stationary body connected to the pedestal and a wheel. A second rotation axis of the wheel may be offset with respect to a first rotation axis of the column with respect to the pedestal.

Abstract: The present invention refers to loading crane comprising: an articulated arm, comprising at least one first and one second bodies successively connected in order to form an open kinematic chain, wherein the second body is translatingly and/or rotatably movable with respect to the first body; a hydraulic circuit adapted to convey a working fluid for actuating the articulated arm. Said hydraulic circuit comprises a segment associated to one of the first and second bodies comprising: at least one sliding rigid tube slidingly translatingly connected to the body to which the segment of the hydraulic circuit is associated; at least one stationary tube integrally connected to the body to which the segment of the hydraulic circuit is associated; a flexible tube fluidically interconnecting the sliding rigid tube and the stationary tube.

Abstract: A limited rotation slewing ring crane comprises: a pedestal, a column rotatively coupled, about a first rotation axis, to the pedestal by a slewing ring rotative coupling, and means for limiting the relative rotation of the column with respect to the pedestal. The crane further comprises a rotative sensor adapted to measure a rotation angle of the column with respect to the pedestal, wherein said rotation sensor comprises: a tubular body axially extending from the base of the column and rotatively integral with the same; a stationary body connected to the pedestal and a wheel, rotatable with respect to the stationary body about a second rotation axis, which is meshed by the tubular body, wherein the second rotation axis of the wheel with respect to the stationary body is offset with respect to the first rotation axis of the column with respect to the pedestal; means for sensing the angular position of the wheel with respect to the stationary body.

Abstract: A load crane main boom of the telescopic type having cylinder-piston groups located inside the main boom tubular sections with reduced dimensions. The load crane main boom minimizes the main boom section thanks to a particular arrangement of the cylinder-piston groups. Each cylinder of each piston-cylinder group is connected to a respective boom section through at least one reinforcing rod extending perpendicular to the main boom axial direction and connected to respective section walls of the main boom. At least first and the second cylinder-piston group rods are further supported by a respective reinforcing plate, which is in turn connected to the respective boom section.

Abstract: A load crane (1) main boom (3) comprises: a fixed tubular first boom section (4I), a tubular second boom section (4II) telescopically arranged and movable relative to the first fixed boom section (4I) between a retracted position and an extended position, and at least a tubular third boom section (4III) telescopically arranged and movable relative to the movable second boom section (4II) between a retracted position and an extended position; a hydraulic system (6) comprising: a first cylinder-piston group (7I) axially extending within the main boom (3), integrally connected with the fixed first boom section (4I) and connected to the movable second boom section (4II) so to move the latter relative to the fixed first boom section (4I) under the action of a pressurized working fluid; a second cylinder-piston group (7II) axially extending within the main boom (3), integrally connected with the movable second boom section (4II) and connected to the movable third boom section (4III) so to move the latter relative

Abstract: A device for remotely commanding a crane comprises a transmission unit suitable for establishing a communication between the device and a control unit of the crane. The device also includes control panel comprising a plurality of manual control members, each arranged for commanding a specific movement of a plurality of available movements of the crane and the direction of the specific movement. The device may also include a plurality of indicators of the available movements of the crane, each correlated with the specific crane movement commandable by a respective manual control member.

Abstract: A device for remotely commanding a crane comprises a transmission unit suitable for establishing a communication between the device and a control unit of the crane. The device also includes a control panel comprising a plurality of manual control members, each arranged for commanding a specific movement of a plurality of available movements of the crane and the direction of the specific movement.

Abstract: It is described an electronic system for the remote maintenance of a crane.