Danfoss Power Solutions Gmbh & Co Ohg

Artemis Intelligent Power Limited

Liebherr-werk Bischofshofen Gmbh

Danfoss Scotland Limited

Alexis Dole

Uwe Bernhard Pascal Stein

Florian Altenberger

Stephen Michael Laird

Onno Kuttler

Luke Wadsley

Hans Knapp

Fergus Robert McIntyre

Christoph Kiegerl

Jack Samuel Lavender

Josef Stock

Mario Hettegger

Rupert Gappmaier

Jens Dominik Willy Eilers

Callan Mackay

Josef Huttegger

Fergus Robert Mcintyre

Uwe Bernahrd Pascal Stein

The present invention relates to a hydraulic system for a hydraulically actuable work machine that comprises a switching valve block having a plurality of valve block inputs for a respective connection to a pressure output of one or more hydraulic fluid pumps; having a plurality of valve block outputs for outputting a pressurized hydraulic fluid; and having at least one valve that is arranged between valve block inputs and valve block outputs and that is adapted to selectively produce a fluid connection between a first valve block input and a first valve block output or between the first valve block input and a second valve block output; a plurality of pressure sources, preferably a plurality of separately controllable pressure sources of which each one is connected to a respective valve block input; and a plurality of hydraulic consumers of which each one is connected to a respective valve block output. The system is characterized in that the first valve block output furthermore already has a fixed fluid connection, preferably a fixed exclusive fluid connection, to a second valve block input and in that the steering is connected to the first valve block output.

Hydraulic system with a switch valve block for a hydraulically actuatable working machine

The present invention relates to a switching valve block for a hydraulically actuable work machine that comprises a plurality of valve block inputs for a respective connection to a pressure output of one or more hydraulic fluid pumps, a plurality of valve block outputs for outputting a pressurized hydraulic fluid, and at least one valve that is arranged between valve block inputs and valve block outputs and is adapted to selectively produce a fluid connection between a first valve block input and a first valve block output or between a first valve block input and a second valve block output. The invention is characterized in that the first valve block output furthermore already has a fixed fluid connection to a second valve block input.

Switch valve block for a hydraulically actuatable working machine

The invention relates to a method of venting a synthetically commutated hydraulic pump (). The connecting fluid conduits (), connecting said synthetically commutated hydraulic pump () with a fluid reservoir () is vented at least on start-up of the synthetically commutated hydraulic pump (), using a fluid intake device () that connects to a fixed displacement pump ().

Method and device for venting the suction side of a synthetically commutated hydraulic pump

A hydraulic pump () comprising: a housing () having first and second inlets () and first and second outlets (); a crankshaft () extending within the housing () and having axially offset first and second cams (); first and second groups () of piston cylinder assemblies provided in the housing (), each of the said groups () having a plurality of piston cylinder assemblies having a working chamber of cyclically varying volume and being in driving relationship with the crankshaft (); one or more electronically controllable valves () associated with the first and second groups (); and a controller () configured to actively control the opening and/or closing of the said electronically controllable valves () on each cycle of working chamber volume to thereby control the net displacement of fluid by the first and second groups (), wherein at least the first group () comprises a first piston cylinder assembly in driving relationship with the first cam () and a second piston cylinder assembly in driving relationship with the second cam (), and wherein the first group is configured to receive working fluid from the first inlet () and to output working fluid to the first outlet () and the second group is configured to receive working fluid from the second inlet () and to output working fluid to the second outlet ().

Controller for hydraulic pump

The invention provides a fluid working machine comprising: a cylinder block () having an axial bore (); a crankshaft () which extends within the axial bore () and is rotatable about an axis of rotation (); and first and second valve cylinder devices () provided in the cylinder block () arranged about and extending outwards with respect to the axial bore (), the first and second valve cylinder devices () being axially offset from each other, the first and second valve cylinder devices () being offset from each other about the axis of rotation (), and the first valve cylinder device having an axial extent which overlaps the axial extent of the second valve cylinder device, wherein the first and second valve cylinder devices () comprise first valves () having respective first working fluid ports (), the said respective first working fluid ports () of the first valves () of the first and second valve cylinder devices () being in fluid communication with each other via a common conduit () extending within the cylinder block ().

Fluid working machine having first and second valve cylinder devices in fluid communication with each other via a common conduit

The invention provides a fluid working machine comprising: a crankshaft () which is rotatable about an axis of rotation (); adjacent first and second groups () of valve cylinder devices () spaced from each other about the axis of rotation (), one or each of the first and second groups () of valve cylinder devices having first, second and third valve cylinder devices () arranged about and extending outwards with respect to the crankshaft (), the first and third valve cylinder devices being axially offset from each other, the second valve cylinder device being axially offset from the first and third valve cylinder devices and the second valve cylinder device being offset from the first and third valve cylinder devices about the axis of rotation, wherein the second valve cylinder device has an axial extent which overlaps with the axial extent of one, or the axial extents of both, of the first and third valve cylinder devices.

Fluid working machine having offset valve cylinders

The invention to a valve unit () for a synthetically commutated fluid working machine (), comprising a valve body (), a movably arranged valve unit () and a separate fluid flow influencing unit (). The fluid flow influencing unit () comprises a fluid flow influencing means part () and an attachment means part () for mechanical connection with the valve body (). The attachment means part () and the fluid flow influencing unit () are connected to each other by a connection means part (). The circumferential extent of the attachment means part () is larger as compared to the circumferential extent of the connection means part ().

Attachment of a fluid flow hat for actuated valve

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Midlothian, United Kingdom

Alexis Dole