A multi-coupling assembly includes a first female coupler and a second female coupler whereby the female couplers are independently operable. Rotation of a rotational lever moves one of the female couplers from the coupling position to the release position without affecting a connection state of the other of the female couplers. Such independent operation of the female couplers is achieved by rotating cams that are configured such that when one of the cams rotates to interact against its respective female coupler, the other of the cams does not act on its respective female coupler. Pressure relief valves are operated such that internal pressure within a female coupler is released prior to the female coupler reaching the release position during a disconnection operation of the male coupler, and prior to the female coupler reaching the coupling position during a connection operation of a male coupler.

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.

Some embodiments of the invention provide a lift arm including an attachment assembly and an electrical supply line having a first end and a second end. The first end is fixed in relation to the lift arm and the second end has a connector coupled to a mounting plate. The lift arm includes a first bracket affixed to the lift arm and a second bracket affixed to the attachment assembly. The mounting plate is moveable between and removably securable to the first bracket and the second bracket.

A coupling/uncoupling device for a plate-like multi-coupling device for the simultaneous connection of a plurality of hydraulic, electrical, and/or pneumatic lines includes quick couplings. In particular, the coupling/uncoupling device is provided with a safety device configured to prevent an accidental uncoupling and to be operated by the operator with one hand only. A plate-like multi-coupling device the includes such coupling/uncoupling device is also an object of the present invention.

A loader including an auxiliary motor disposed on an attachment interface is disclosed. The loader also has one or more primary motors providing motive power for the loader. The loader also includes lift arms having an attachment interface on a distal portion of the lift arms. The auxiliary motor is disposed on the attachment interface and an auxiliary motor interface is coupled to the auxiliary motor. The auxiliary motor is configured to transfer torque from the auxiliary motor to a powered attachment mounted to the attachment interface.

A coupler for coupling an attachment to an excavator or other machine comprises a powered actuator for actuating a locking member into and out of said locking state, a first power coupling unit, and a second actuator for moving the power coupling unit into and out of an engaging position in which it is engagable with a corresponding second power coupling unit of the attachment. The coupler is configured to cause the first power coupling unit to move into the engaging position after said latching member adopts the locking state and, when decoupling the attachment from the coupler, to cause said latching member to remain in its locking state until after the first power coupling unit is moved out of its engaging position.

An improved arrangement for multi-position attachment points for hydraulic implement coupling. Hydraulic hoses associated with an implement attachment assembly may be removably coupled to a lift arm when in a non-operating configuration, and removably coupled to the attachment assembly when in an operating configuration.

An adapter for a quick-change system for changing attachments on a construction machine, which contains two parallel pin-like coupling elements arranged between parallel side parts at a stipulated spacing from each other for connection of the adapter to a quick coupler and a coupling member support releasably fastened to one of the coupling elements to secure the coupling elements. In order to permit simplified fastening, the coupling member support is connected directly to the pin-like coupling element secured against torsion via a releasable form-fit connection.

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.

The invention relates to a method for reproducing audio in a multi-channel sound system including two input signals (L and R), wherein output signals are generated for different sound perception levels. In order to develop said method in such a way that audio can be reproduced within a larger range of applications in a multi-channel sound system, according to the invention, only a lower sound perception level (7) and a higher sound perception level (6) are generated, and a maximum of six output signals are generated, a maximum of two output signals being allocated to the lower sound perception level (7) and a maximum of four output signals being allocated to the higher sound perception level (6).