A multi-coupling component (20) includes a plurality of fluid couplers (22, 24, 26, 28) that are fluidly connected to a plurality of corresponding fluid flow pathways (80, 84), and a case drain fluid coupler (32) that is fluidly connected to a low pressure drain fluid pathway (88); and a pressure relief mechanism (40) that is configured to be moved between a disconnected state, a partially connected state, and a fully connected state. The pressure relief mechanism is configured such that in the partially connected state the fluid flow pathways and drain fluid pathway are fluidly connected to perform a pressure relief function, and in the disconnected state and the connected state the drain fluid pathway is isolated from the fluid flow pathways. The pressure relief mechanism includes a pressure relief button, wherein the pressure relief button is depressed to move the pressure relief mechanism from the disconnected state to the partially connected state and to the connected state. The pressure relief mechanism may be operated manually by hand for the subsequent connection of individual fluid couplers, or automatically when a second multi-coupling component is attached to the multi-coupling component that has the pressure relief mechanism.

Disclosed is a device for relieving pressure in hydraulic lines, in particular in connecting lines that have coupling points (6, 8) and are located between attachments comprising hydraulically actuated actuators and working implements supplying said attachments. The disclosed device comprises a control block (2) which is connected to the line to be relieved and which includes an openable non-return valve (12) as a relief valve, a pressure accumulator (22) which holds a relieving volume when the non-return valve is open, and an actuating member (38) which can be moved manually in order to open the non-return valve (12) and which is arranged so as to be movable on the housing (24) of the pressure accumulator (22).

The present invention relates to a multi-coupling device of the plate type for the simultaneous connection of a plurality of hydraulic, electric and pneumatic lines through quick couplings. The device according to the present invention is characterized in that it comprises bayonet coupling means which allow the coupling of the two plates by means of the relative sliding of the mobile plate with respect to the fixed plate. By virtue of the presence of a dedicated hydraulic circuit which connects the female couplings of the fixed plate to one another, the multi-coupling device according to the present invention allows to separate the step of coupling of the plates from the step of hydraulic connection of the male and female couplings.

A coupling assembly for releasably mounting, and hydraulically coupling, a tool to a work machine. The coupling assembly includes a mount attachable to the work machine and configured to receive the tool in a mounted position of the tool, a rigid retaining body movable in translation relative to the mount along a translation axis between a retaining position for retaining the tool to the mount and a release position for releasing the tool from the mount, a first and a second actuator operable to move the retaining body between the retaining and release positions, and a hydraulic coupling manifold movable in translation relative to the mount along the translation axis for hydraulically coupling the tool to the machine, wherein the hydraulic coupling manifold uses the first and second actuators as guides for moving along the translation axis.

The present disclosure relates to an implement connectable to a working vehicle. The implement includes an arm, a fastening arrangement arranged at a first part of the arm, and an attaching arrangement connected to a second part of the arm. The fastening arrangement is connectable to the working vehicle. The attaching arrangement is attachable to a working tool. The implement further includes a first hydraulic circuit configured to carry hydraulic fluid to at least one first hydraulic function and a local control element. The implement further includes a digital interface to the working vehicle. The local control element is arranged to receive an operator control signal via said digital interface for operator control of the at least one first hydraulic function.

An adapter for a quick-change system for changing attachments on a construction machine contains coupling elements arranged at a stipulated spacing from each other between two side walls for connection of the adapter to a quick changer. In order to provide improved protection from damage, the rear ends of the two side walls project rearwardly with respect to a back cover arranged between the side walls.

A multi-coupler of a work vehicle includes a first portion and a cover. The first portion has a coupling surface. The first hydraulic connector is arranged on the coupling surface. The cover is movable between a first position in which the cover covers the coupling surface and a second position in which the coupling surface is uncovered by cover. The cover has a cover shell defining an interior cavity. The cover also includes an insert received into the interior cavity of the cover shell. The insert is operable to absorb a fluid that escapes from the first hydraulic connector.

In the case of an incorrect polarity of connectors in hydraulic networks, a switching device is provided, and formed with a connector part, a valve body, a switching part displaced axially in the valve body within limits, a base part and a top part. Wherein cooperating annular chambers for the conducting of a working fluid are formed in the region of an inner surface of the valve body and an outer surface of the switching part. Annular surfaces (A2, A3, A5, A7) are acted upon with pressurized fluid on the switching part towards the top part and annular surfaces (A1, A4, A6) of the switching part are acted upon towards the base part have a following size relations when there is a permanent fluidic connection of the annular chambers:

A2=A3>0.5×A1;

A4>A5+A7;

A3+A7>A4+A6;

A1=2A2−A4+A5−A6+A7

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).

Hydraulic system (120) for a vehicle comprising a vehicle hydraulic circuit (122) among others for the hydraulic supply of connecting means of an automatic coupling means, wherein the connecting means is designed to connect a coupling means (31) of the vehicle with a correspondingly designed coupling means (32) of an add-on unit and an operating hydraulic circuit (121) for supplying at least one Power-Beyond coupling, wherein the vehicle hydraulic circuit and the operating hydraulic circuit are designed independent of one another and each having a hydraulic pump.