Patents Assigned to Artemis Intelligent Power Limited
  • Patent number: 10975890
    Abstract: The invention relates to a hydraulic fluid power transmission comprising: actuator apparatus having a plurality of chambers, each of the chambers having a respective fluid driving surface configured to drive or be driven by hydraulic fluid therein; a discretised pressure control system configured to selectively connect one or more first chambers of the said plurality of chambers to one of a plurality of hydraulic fluid sources or sinks, at least two of the plurality of hydraulic fluid sources or sinks having different fluid pressures; a continuous pressure control system configured to control the pressure of hydraulic fluid, or a flow rate of hydraulic fluid, input to or output from one or more second chambers of the said plurality of chambers, the pressure or flow rate of the hydraulic fluid input to or output from the second chambers being thereby variable within a range of pressures or flow rates respectively; and a controller configured to control the discretised and continuous pressure control systems to
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: April 13, 2021
    Assignee: Artemis Intelligent Power Limited
    Inventors: Ross McKay Henderson, Richard William Yemm, Carn Nathaniel George Gibson
  • Publication number: 20200386101
    Abstract: A hydraulic system employing an electronically commutated fluid working machine having working chambers, each having one or more electronically controllable valves actively controlled by a controller to regulate the net displacement of working fluid into or out of low- and high-pressure manifolds on a cycle by cycle basis to meet an indicated demand. The high-pressure manifold has an additional outlet, regulated by a controllable outlet valve. If the demand indicated by a demand signal is expected to cause pulsatile flow or vibrations which may excite resonant modes, the controller causes the displacement of working fluid by the working chambers to exceed the demand indicated by the demand signal, and the controller simultaneously opens an electronically controllable outlet valve to allow some of the excess flow to leave, such that the net displacement of fluid meets the demanded displacement of fluid, while mitigating the pulsatile flow or undesirable vibrations.
    Type: Application
    Filed: June 4, 2020
    Publication date: December 10, 2020
    Applicants: ARTEMIS INTELLIGENT POWER LIMITED, DANFOSS SCOTLAND LIMITED
    Inventors: Paul MARSHALL, Jeremie LAGARDE, Uwe STEIN, William Hugh Salvin RAMPEN
  • Patent number: 10584691
    Abstract: A fluid working machine of the type comprising working chambers of cyclically varying volume and low and high pressure valves to regulate the flow of working fluid into and out of the working chamber, from low and high pressure manifolds, in which the valves are electronically controlled on each cycle of working chamber volume, by way of valve actuation signals, to determine the net displacement of working chambers. Additional valve actuator signals are generated in response to determination that a valve or working chamber has been inactive to adapt the valve to operate more reliably when subsequently actuated, but without significantly altering the net displacement of working chambers.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: March 10, 2020
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Fergus McIntyre, Stephen Laird
  • Patent number: 10180135
    Abstract: An injection molding system, water jet cutting machine or other industrial system has a synthetically controlled variable displacement fluid working machine which outputs hydraulic fluid to one or more fluid consumers, such as rams or hydraulic motors, through hydraulically stiff fluid retaining volumes and receives hydraulic fluid back from one or more fluid consumers through the same or other said hydraulically stiff fluid retaining volumes. Individual piston cylinder assemblies can be allocated to different outputs. There may be no valve between the machine and the consumers. A working chamber of the machine can be caused to undergo a motoring cycle to enable the machine to output more power than is received from a motor driving the machine. An accumulator can be used to provide a source of hydraulic compliance. The machine can be controlled using pressure control, flow control, feed forward control or variable power/variable power limit control.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 15, 2019
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall James Caldwell, Jeremy Edmondson, Alasdair Ian Fletcher Robertson, Uwe Bernhard Pascal Stein
  • Patent number: 10094372
    Abstract: A fluid-working machine has a plurality of working chambers, e.g., cylinders, of cyclically changing volume, a high-pressure fluid manifold and a low-pressure fluid manifold, at least one valve linking each working chamber to each manifold, and electronic sequencing means for operating said valves in timed relationship with the changing volume of each chamber, wherein the electronic sequencing means is arranged to operate the valves of each chamber in one of an idling mode, a partial mode in which only part of the usable volume of the chamber is used, and a full mode in which all of the usable volume of the chamber is used, and the electronic sequencing means is arranged to select the mode of each chamber on successive cycles so as to infinitely vary the time averaged effective flow rate of fluid through the machine.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: October 9, 2018
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Uwe Bernhard Pascal Stein, Niall James Caldwell, William Hugh Salvin Rampen, Jonathan Paul Almond
  • Patent number: 9976641
    Abstract: A hydraulic transmission comprising a variable displacement pump and motor, at least one having cylinders having valves which are controllable on each cycle of cylinder working volume to determine the net displacement of working fluid by the cylinder. The transmission has a valve control module which determines a displacement of the pump and the motor by specifying a displacement demand. The pump and/or motor valve control module determine the frequency of intensity peaks in the frequency spectrum of the pattern of cylinders carrying out active and inactive cycles of cylinder working volume using a first procedure and, if these will fall within disallowed frequency bands including the resonant frequency of components with which the transmission is in mechanical communication, the displacement demand, or another input, is periodically modified to suppress generation of those frequencies. The hydraulic transmission is useful for example in a wind turbine generator, or a vehicle.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: May 22, 2018
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall Caldwell, Daniel Abrahams, Daniil Dumnov
  • Patent number: 9828986
    Abstract: A method of measuring a property of entrained gas in a hydraulic liquid received by a working chamber of a fluid working motor, wherein the said property is determined from the period of time elapsing between the closure of a first valve to isolate the working chamber and the passive opening of a second valve to bring the working chamber into fluid communication with a manifold. The property may, for example, be related to the concentration of entrained gas in the received hydraulic liquid or the compressibility or bulk modulus of the received hydraulic fluid.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: November 28, 2017
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall James Caldwell, Stephen Michael Laird
  • Patent number: 9797393
    Abstract: A fluid-working machine has a working chamber of cyclically varying volume, high and low pressure manifolds, and high and low pressure valves for regulating the flow of fluid between the working chamber and the high and low pressure manifolds respectively. A controller actively controls at least one said valve to determine the net displacement of working fluid of the working chamber on a cycle by cycle basis. At least one said valve is a variable timing valve and the controller causes the valve to open or close at a time determined taking into account one or more properties of the performance of the fluid working machine measured during an earlier cycle of working chamber volume.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: October 24, 2017
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: William Hugh Salvin Rampen, Uwe Bernhard Pascal Stein, Niall James Caldwell, Stephen Michael Laird, Pierre Robert Joly, Michael Richard Fielding, Daniil Sergeevich Dumnov
  • Patent number: 9739266
    Abstract: The present invention relates to a method of operating a fluid-working machine wherein the volume of working fluid displaced each cycle is selectable and wherein the volume of working fluid displaced by a first working chamber takes into account the suitability of the working chamber to displace fluid. The invention extends in further aspects to power absorbing structures such as renewable energy devices comprising such fluid working machines. The invention allows the operation of fluid working machines and power absorbing structures which are more long lived.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: August 22, 2017
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Stephen Hugh Salter, William Hugh Salvin Rampen, Michael Richard Fielding, Niall James Caldwell, Stephen Michael Laird, Pierre Robert Joly
  • Patent number: 9732748
    Abstract: A valve unit for regulating the flow of working fluid between a working chamber of a fluid working machine and both a first working fluid line and second working fluid line, the valve unit comprising: a first valve comprising a first valve member and one or more cooperating first valve seats, a second valve comprising a second valve member and one or more cooperating second valve seats, an actuator coupled to both the first and second valve members through which a force may be applied to urge the first valve member open or closed and to urge the second valve member open or closed, a coupling between the actuator and the first valve member, wherein the coupling between the actuator and the first valve member comprises a connector which extends at least partially through the second valve member.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: August 15, 2017
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Uwe Stein, Jens Eilers, Jack Lavender, Stephen Laird
  • Patent number: 9488163
    Abstract: The present invention provides a fluid system (99) comprising a source of hydraulic fluid under pressure supplying a hydraulic fluid consumer (103) together with a valve passing fluid between said source and said fluid consumer (102). A first fluid compliance (105) is situated between said source (100) and said valve (102) and a variable restrictor (110) is provided for varying the cross sectional area available for flow of fluid through said valve (102) and is movable between a first position (A) with a larger said area and a second position (B) with a smaller said area. A bias means (117) biases said restrictor (110) towards said second position while an opening means (Fa) urges said restrictor (110) against said bias (117) when fluid flows through said valve (102) and a damping means (126) damps movement of said restrictor between said first and second positions and provides a resistance which increases with the velocity of displacement of said restrictor (110).
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: November 8, 2016
    Assignees: Artemis Intelligent Power Limited, Sauer-Danfoss APS
    Inventors: Niall James Caldwell, William Hugh Salvin Rampen
  • Patent number: 9328720
    Abstract: A fluid-working machine for a renewable energy generation device, the fluid-working machine comprising a ring cam and a plurality of working chambers, the ring cam having an annular working surface extending around an axis of rotation of the ring cam, the annular working surface defining a plurality of waves, each working chamber having a piston, each piston in operative engagement with the ring cam working surface, the ring cam and working chambers being mounted to rotate relative to each other, cycles of working chamber volume being thereby coupled to rotation of the ring cam relative to the working chambers, characterized in that the individual waves of the ring cam working surface have an asymmetric profile.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: May 3, 2016
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall James Caldwell, Daniil Sergeevich Dumnov, William Hugh Salvin Rampen, Alasdair Ian Fletcher Robertson, Uwe Bernhard Pascal Stein, Robert George Fox
  • Patent number: 9309877
    Abstract: Disclosed is a cylinder assembly for a fluid-working machine. The assembly includes a body having a first end and a second end. The body further includes a cylinder, a poppet valve seat and a face-sealing annular valve seat. The cylinder is open to the first end and configured to receive a reciprocating piston. The poppet and annular valve seats extend around an axis through the cylinder. An annular valve including the annular valve seat and an annular valve member extends around the cylinder. Thus, the cylinder assembly is compact.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: April 12, 2016
    Assignees: ARTEMIS INTELLIGENT POWER LIMITED, DANFOSS POWER SOLUTIONS APS
    Inventor: Uwe Stein
  • Publication number: 20160003239
    Abstract: A valve unit for regulating the flow of working fluid between a working chamber of a fluid working machine and both a first working fluid line and second working fluid line, the valve unit comprising: a first valve comprising a first valve member and one or more cooperating first valve seats, a second valve comprising a second valve member and one or more cooperating second valve seats, an actuator coupled to both the first and second valve members through which a force may be applied to urge the first valve member open or closed and to urge the second valve member open or closed, a coupling between the actuator and the first valve member, wherein the coupling between the actuator and the first valve member comprises a connector which extends at least partially through the second valve member.
    Type: Application
    Filed: March 3, 2014
    Publication date: January 7, 2016
    Applicant: Artemis Intelligent Power Limited
    Inventors: Uwe STEIN, Jens EILERS, Jack LAVENDER, Stephen LAIRD
  • Patent number: 9188119
    Abstract: A fluid-working machine has a plurality of working chambers, e.g., cylinders, of cyclically changing volume, a high-pressure fluid manifold and a low-pressure fluid manifold, at least one valve linking each working chamber to each manifold, and electronic sequencing means for operating said valves in timed relationship with the changing volume of each chamber, wherein the electronic sequencing means is arranged to operate the valves of each chamber in one of an idling mode, a partial mode in which only part of the usable volume of the chamber is used, and a full mode in which all of the usable volume of the chamber is used, and the electronic sequencing means is arranged to select the mode of each chamber on successive cycles so as to infinitely vary the time averaged effective flow rate of fluid through the machine.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: November 17, 2015
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Uwe Bernhard Pascal Stein, Niall James Caldwell, William Hugh Salvin Rampen, Jonathan Paul Almond
  • Patent number: 9133838
    Abstract: In a method of operating a fluid-working machine, the volume of working fluid displaced during each cycle of working chamber volume is selected taking into account the availability of other working chambers. The status of each working chamber is monitored and a working chamber treated as unavailable if it is found to be malfunctioning. A working chamber may be treated as unavailable if it is allocated to an alternative working function. A fault may be detected in a working chamber by determining whether a measured output parameter of the fluid working machine fulfills at least one acceptable function criterion taking into account the previously selected net displacement of working fluid by a working chamber during a cycle of working chamber volume to carry out the working function.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: September 15, 2015
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: William Hugh Salvin Rampen, Niall James Caldwell, Stephen Michael Laird
  • Patent number: 9133839
    Abstract: In a method of detecting a fault in a fluid-working machine including a plurality of working chambers of cyclically varying volume, each working chamber is operable to displace a volume of working fluid which is selectable for each cycle of working chamber volume to carry out a working function responsive to a received demand signal. An output parameter of the fluid working machine, which is responsive to the displacement of working fluid by one or more of the working chambers to carry out the working function, is measured. It is determined whether the measured output parameter fulfils at least one acceptable function criterion, taking into account the previously selected net displacement of working fluid by a working chamber during a cycle of working chamber volume to carry out the working function.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: September 15, 2015
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: William Hugh Salvin Rampen, Niall James Caldwell, Michael Richard Fielding, Stephen Michael Laird, Uwe Bernhard Pascal Stein, John Tearlach Campbell
  • Patent number: 9127656
    Abstract: A ring cam for a fluid-working machine is formed from a plurality of segments. The segments comprise a leading cooperating formation which has a piston facing surface which forms part of the working surface, at a trailing end, and which is recessed from the working surface at a leading end, and a trailing cooperating formation which has a piston facing surface which forms part of the working surface at a leading end, and which is recessed from the working surface at a trailing end. The segments having piston facing surfaces which are in compressive stress such as to partially or fully compensate for tensile stress arising from the action of rollers in use. The segments form a wavelike cam surface and attachment means are provided, through the working surface, on whichever of the leading or trailing surfaces thereof is subject to lowest forces from pistons in use.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: September 8, 2015
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: William Hugh Salvin Rampen, Uwe Bernhard Pascal Stein, Robert George Fox, Stephen Hugh Salter
  • Patent number: 9103438
    Abstract: A hydraulic pump is driven by a rotating shaft, driven in turn by a renewable energy source. A hydraulic motor drives a load and a high pressure manifold communicates between the pump, motor and an elastically deformable fluid retaining body. The pressure in the high pressure manifold is measured and the net rate of displacement of working fluid by the hydraulic pump is selected responsive thereto to regulate the torque applied to the rotating shaft. The net rate of displacement of working fluid by the hydraulic motor is selected to smooth the energy flow to the load. The net rate of displacement of working fluid by the hydraulic motor is selected to regulate the pressure in the high pressure manifold to remain within an acceptable pressure range.
    Type: Grant
    Filed: May 30, 2011
    Date of Patent: August 11, 2015
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall James Caldwell, Daniil Sergeevich Dumnov, Michael Richard Fielding
  • Patent number: 9091254
    Abstract: A fluid working machine comprises a working chamber of cyclically varying volume, a high pressure manifold, and an actuated high pressure valve for regulating the flow of fluid between the working chamber and the high pressure manifold. The actuated high pressure valve comprises a moveable valve member, operable between a closed position and at least one open position. A controllable opening mechanism provides an active urging force to urge the moveable valve member from the said closed position towards at least one said open position, the volume of the working chamber varying between a maximum volume and a minimum volume. The controllable opening mechanism provides the active urging force more than once while the volume of the working chamber is intermediate the maximum of chamber volume and the minimum of chamber volume.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: July 28, 2015
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Stephen Michael Laird, Daniil Sergeevich Dumnov, Michael Richard Fielding, Niall James Caldwell