A hydraulic rotational drive for rotating load-handling equipment relative to a crane arm is provided with a shaft, which has first securing means for connecting the shaft to the load-handling equipment or the crane arm, a shaft bearing, which has second securing means for connecting the shaft bearing to the crane arm or the load-handling equipment, vanes arranged in the shaft which can be acted on by oil via an oil feed and an oil discharge for the transmission of a torque to the shaft, wherein the rotational drive has a rotary encoder for the detection of the angular position of the shaft relative to the shaft bearing.

A hydraulic assembly including a pivot connection defining a pivot axis, a hydraulic element linked to the pivot connection, and a connector for connecting a hydraulic conduit to the hydraulic element. The connector defines a connection axis and the connector is configured such that the connection axis approximately intersects the pivot axis. The hydraulic assembly may be used in various applications, including in forestry equipment, for example, with a rotator link assembly.

A material handling bucket apparatus including a material handling bucket and method of use thereof. The material handling bucket includes a bucket back half and a bucket front half. The bucket back half is configured to engage a loader. The bucket back half includes a plurality of guide slots and a dozer scraping lip configured to engage a surface. The bucket front half is pivotally coupled to the bucket back half. The bucket front half includes a plurality of slide members receivable in the plurality of guide slots. The plurality of slide members are configured to slide within the plurality of guide slots to allow the bucket front half to move linearly and pivotally relative to the bucket back half.

A framework comprises a laser distance meter (LDM), reflector, and excavator comprising a boom, a stick, boom and stick sensors, implement, and a controller. The LA comprises a boom and stick defining LA positions. The LDM is configured to generate a D.sub.LDM and .sub.INC between the LDM and the reflector, and the controller is programmed to generate .sub.B at a plurality of boom positions, generate .sub.S at a plurality of stick positions, and calculate a height H and a distance D between a node on the stick and the LDM based on D.sub.LDM and .sub.INC, build a set of H, D measurements and a corresponding set of .sub.B, .sub.S, and execute a linear least squares optimization process based on the H, D set and corresponding set of .sub.B, .sub.S to determine and operate the excavator using L.sub.B and L.sub.S.

A vacuum lift attachment (10) for a hydraulic work machine, the hydraulic work machine including a control station, a lift arm to which the hydraulic work attachment can be coupled, an auxiliary hydraulic system for operating a coupled hydraulic work attachment and an auxiliary hydraulic actuator in the control station that upon actuation by an operator causes an auxiliary hydraulic control signal to generate. The vacuum lift attachment comprises a body (12) having an upper end (13) that is adapted to be coupled to the lift arm of the hydraulic work machine and for hydraulic fluid connection to the auxiliary hydraulic system of the hydraulic work machine, a vacuum pad (20) mounted to the lower end of the body (10), a hydraulic vacuum pump (34) fluidly connected to the auxiliary hydraulic system and an electronic controller (26) that is configured to receive an auxiliary hydraulic control signal and convert the auxiliary hydraulic control signal to an electronic signal for electronic control of the hydraulic vacuum pump (20) by an operator actuating the auxiliary hydraulic actuator in the control station.

A common connection apparatus for coupling a power tool to an extensible arm and a power supply, the apparatus including a tool support base designed to support a tool, and a power supply support base designed to be affixed to the end of the extensible arm. The tool support base and the power supply support base each include a plurality of power connectors, positioned for engagement when the bases are aligned. The tool support base also has an alignment stab, which is received within a channel of the power supply support base. A plurality of pins are further positioned on the tool support base, to be received in apertures of the power supply support base. By this configuration, the bases may be aligned and engaged, facilitating the transmission of power from the machinery to which the arm is affixed, to the tool.

The invention relates generally to hydraulic rotator. More specifically, the invention relates to a system that provides for the successful three hundred and sixty-degree, clockwise or counterclockwise rotation of heavy weights. The system successfully bears the weight of the equipment, the hydraulic rotator, the attachment to the hydraulic rotator and the materials being targeted by the attachment, as well as the torque load and stress produced by the successful three-hundred-and-sixty-degree rotation.

The invention relates to a rotary actuator (1) to be installed between a dipper arm (9) and an excavator tool (12) of an excavator (2). The rotary actuator (1) comprises a first actuator part (20) adapted to be fixed to the dipper arm (9) or to the excavator tool (12), wherein the first actuator part (20) is formed with an inner cylindrical orifice (23) comprising first part guide means (24). The rotary actuator (1) further comprises a second actuator part (21) adapted to be fixed to the other of the dipper arm (9) or the excavator tool (12), wherein at least a part of the second actuator part (21) is arranged inside the inner cylindrical orifice (23) and wherein the second actuator part (21) is rotatably supported by the first actuator part (20) while being substantially axially fixed in relation to the first actuator part (20). Furthermore, an outer cylindrical surface (25) of the second actuator part (21) comprises second part guide means (26). The rotary actuator (1) also comprises a piston part (22) arranged inside the inner cylindrical orifice (23) and around at least a part of the a second actuator part (21), wherein the piston part (22) is axially displaceable in relation to the a first actuator part (20) and the a second actuator part (21) and wherein an outer cylindrical piston part surface (29) is provided with outer piston part guide means (35) arranged to mesh with the first part guide means (24) and an inner cylindrical piston part surface (30) is provided with inner piston part guide means (36) arranged to mesh with the second part guide means (26). The second actuator part (21) is formed as a cantilever and piston means (27) of the piston part (22) extends all the way across the free end (28) of the second actuator part (21). The invention further relates to a method for tilting an excavator tool (12) in relation to a dipper arm (9) of an excavator (2) by means of a rotary actuator (1) and use of a rotary actuator (1).

A measurement value acquisition unit acquires measurement values from a plurality of sensors. A posture calculation unit calculates a posture of an attachment with respect to a vehicle body. An intervention control unit determines a virtual rotation axis based on the calculated posture of the attachment. An intervention control unit generates a control signal for the tilt rotator to rotate the attachment around the virtual rotation axis so that a design surface and teeth of the attachment are approximately parallel to each other, based on the calculated posture of the attachment. An output unit outputs the generated control signal.

A scoop shovel for attachment onto a skid steer tractor having a very low profile to reach into areas with little vertical clearance. Optionally, the scoop shovel may be rotatable about a horizontal axis extending forward of the skid steer tractor to assist in dumping the shovel's load.