Abstract: A quick-hitch for coupling a tool to an excavator arm or to a similar tool manipulator, including two hitch halves that can be latched together and that comprise at least one pair of latching parts with which a displaceable latch is associated, an actuating cylinder being provided for actuating the latch. The actuating cylinder has a mechanical blocking unit for locking the latching position of the bolt, having a lead screw which is in a threaded engagement with the piston and/or the piston rod of the actuating cylinder, so that the piston is only displaceable by turning the lead screw, as well as a releasable anti-rotation device for the lead screw.

Abstract: A quick-hitch for coupling a tool to an excavator arm or a similar tool manipulator includes two hitch halves that can be latched together, coupled to one another at a first pair of latching parts, and pivoted together, about the coupled first pair of latching parts, into a coupling position in which a second pair of latching parts of the hitch halves can be latched. Energy coupling parts are provided on and a coupling carrier is attached to each of the two hitch halves.

Abstract: A hydraulic swivel drive for a grab that has two gripping arms or shells movable like tongs, including two swivel shafts parallel to each other and rotatably mounted in a drive housing, whose shaft ends are connectable with the gripper arms or shells, wherein the swivel shafts each have two oppositely threaded screw engagement portions, with which two pistons movable in opposite directions by means of hydraulic pressure for driving the swivel shafts are in screw engagement. Two differently large and differently contoured cylinder pressure chambers can be assigned to each piston in order to optimally adapt the cross-sectional area of the pistons for each of the reciprocating positioning movements and to appropriately select the pressure conditions. To be able to run in the differently contoured and dimensioned cylinder pressure chambers, each of the pistons is provided with different piston portions which are adapted to the respective cylinder pressure chamber.

Abstract: A hydraulic driven turning device to be installed to a construction machine has a first body and a second body turning in relation to the first body, and a hydraulic cylinder attached from the first and second bodies to another body. A piston is axially movable via a hydraulic pressure medium, and a spiral part is attached to the piston. The spiral part causes a rotational movement to a counter part equipped with a spiral, whereupon the rotational movement can be transferred to be a turning movement of another body. The piston is arranged to be non-rotating in the cylinder by forming the cross section of the piston and the cylinder to be deviant from a round form, such as having an oval or angular shape, or by adjusting the piston to be eccentric in relation to a bearing axis thereof.

Abstract: An arrangement for fixing a work piece (14) to an end of a boom (1) in a working machine, like an excavator, in which arrangement the end of the boom comprises at least a tilting device (13) for the work piece (14), the moveable body of said device can be limitedly tilted in relation to the end of the boom (1) and to the moveable body of said device the work piece (14) is fixed either directly or by fitting a device (10), (11) of an other type as a distance piece, said device adjusting position of the work piece (14).

Abstract: A crushing or cutting device comprising a body (6), crushing/cutting jaws (1) making, rotation and attached to the body by means of one or several shafts (5), a first power unit (3) to move said jaws against each other, whereby at least one shaft (5) of jaw (1) is fitted with bearings to rotate in regard both to body (6) and jaw (1) and the said bearings are eccentric among themselves and the device has a second power unit (4) in order to rotate at least one said shaft (5). The second power unit (4) is fitted to press jaws (1) against each other in multiplying the motive force of the second power unit (4) between eccentricity distance (e) of the bearings and by means of a torsion arm longer than said eccentricity distance (e) connected to the shaft, in a situation, where shaft (5) is rotated 180° at the most, and when the first power unit (3) is hydraulically locked or in a position pressing the jaws against each other.

Abstract: The invention relates to a lifting fork for lifting pallets, panels, panel stacks, and the like, and comprises a fork carrier, the lower end of which supports lifting prongs, and the upper end of which is attachable to a linking piece which has a pendulous axis for the pendulous mounting of the lifting fork. According to the invention, the lifting fork is distinguished by the fact that a swivel device is provided by which all the lifting prongs are able to be swiveled, in the unloaded state, about a common axis which is located parallel to the pendulous axis of the linking piece and parallel to the insertion direction in which the lifting prongs are insertable under a pallet, panels, or a panel stack, or the like.

Abstract: The invention relates to a hydraulic swivel drive for a grab which has two tong-like movable grab arms, in particular two-shell grabs, having two swivel shafts which are pivotally supported in a shell carrier, are parallel to one another and whose shaft ends can be connected to the grab arms, as well as a shaft drive piece which is displaceably supported parallel to the swivel shafts and is in screw engagement with both swivel shafts so that the swivel shafts are rotated in opposite directions by displacement of the shaft drive piece. In accordance with the invention, the swivel drive is characterized in that at least one hydraulically chargeable plunger piston is provided to displace the shaft drive piece.