Patents by Inventor William Hugh Salvin Rampen

William Hugh Salvin Rampen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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
  • Publication number: 20190226959
    Abstract: An object is displaced alternately in opposite directions, using a hydraulic power unit having a rotatable body which includes the shaft of a hydraulic machine having electronically commutated valves. A motor drives the rotatable body. The hydraulic machine drives an actuator to displace the object in use. Energy is transformed from rotational kinetic energy of the rotatable body to elastic strain energy or elastic strain and gravitational potential energy of the object during a pumping phase and rotation of the rotatable body slows, but does not change direction. The potential energy then drives the hydraulic machine to motor and the rotatable shaft speeds up again, storing rotational kinetic energy. The displacement of the hydraulic machine is controlled throughout to match a time varying demand taking into account the varying speed of rotation of the rotatable shaft. The motor provides energy to compensate for losses and the process can repeat cyclically.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 25, 2019
    Inventors: William Hugh Salvin RAMPEN, Niall CALDWELL, Peter MCCURRY
  • Publication number: 20190211849
    Abstract: A fluid power system comprises a pump with multiple independently variable outlets, each of which is capable of delivering fluid in individually controllable volume units and a plurality of hydraulic loads. A system of switching valves is configured to create fluid connections between the pump outlets and the loads. A control system commands both the pump and the switching valves, so as to create valve state combinations to satisfy load conditions as demanded by an operator. The number of pump outlets connected to one or more of the loads is changeable to satisfy the flow required of the load due to the operator demand, each pump outlet being commanded to produce a flow depending on the status of other outlets connected a load to which the outlet is connected and the operator demand for that load.
    Type: Application
    Filed: November 27, 2018
    Publication date: July 11, 2019
    Inventors: William Hugh Salvin Rampen, Niall James Caldwell, Uwe Bernhard Pascall Stein, Pierre Joly, Michael Richard Fielding
  • Publication number: 20190048869
    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: Application
    Filed: September 21, 2018
    Publication date: February 14, 2019
    Inventors: Uwe Bernhard Pascal STEIN, Niall James CALDWELL, William Hugh Salvin RAMPEN, Jonathan Paul ALMOND
  • Patent number: 10161423
    Abstract: A fluid power system comprises a pump with multiple independently variable outlets (11, 12, 13, 14), each of which is capable of delivering fluid in individually controllable volume units and a plurality of hydraulic loads (15, 16, 18, 20). A system of switching valves is configured to create fluid connections between the pump outlets and the loads. A control system commands both the pump and the switching valves, so as to create valve state combinations to satisfy load conditions as demanded by an operator. The number of pump outlets (11, 12, 13, 14) connected to one or more of the loads (15, 16, 18, 20) is changeable to satisfy the flow required of the load due to the operator demand, each pump outlet being commanded to produce a flow depending on the status of other outlets connected a load to which the outlet is connected and the operator demand for that load.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: December 25, 2018
    Assignee: Sauer-Danfoss ApS
    Inventors: William Hugh Salvin Rampen, Niall James Caldwell, Uwe Bernhard Pascall Stein, Pierre Joly, Michael Richard Fielding
  • 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: 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: 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: 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
  • Publication number: 20150211513
    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: Application
    Filed: April 9, 2015
    Publication date: July 30, 2015
    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: 9052033
    Abstract: A valve assembly suitable for regulating the flow of fluid between a working chamber of a fluid-working machine and a fluid manifold. The valve assembly comprises a valve body comprising a valve seat, a fluid passage extending through the valve body, and a travelling member comprising a valve member, which valve member is operable between an open position in which the valve member is spaced apart from the valve seat and fluid can flow through the fluid passage and a closed position in which the valve member is in sealing contact with the valve seat preventing fluid from flowing through the fluid passage. The valve assembly defining a fluid flow path passing, in a first fluid flow mode, between the valve member and the valve seat, and into the fluid passage.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: June 9, 2015
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall James Caldwell, Uwe Bernhard Pascal Stein, William Hugh Salvin Rampen
  • Patent number: 9052032
    Abstract: A valve assembly for regulating the flow of fluid between a working chamber of a fluid-working machine and a fluid manifold. The valve assembly comprising a valve body comprising a valve seat, a fluid passage extending through the valve body, and a travelling member comprising a valve member and operable between an open position in which the valve member is spaced apart from the valve seat and fluid can flow through the fluid passage and a closed position in which the valve member is in sealing contact with the valve seat preventing fluid from flowing through the fluid passage. The valve assembly further defines a fluid flow path passing in a first fluid flow mode, between the valve member and the valve seat, and into the fluid passage. The valve assembly is characterized by a barrier upstream of the valve member, to the barrier reduces one or more forces which would otherwise act on the valve member as a result of the flow of fluid to urge the valve member towards the valve seat.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: June 9, 2015
    Assignee: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Niall James Caldwell, William Hugh Salvin Rampen, Uwe Bernhard Pascal Stein
  • Patent number: 9033309
    Abstract: The invention relates to a valve actuator (2), comprising a magnetic core (6) with an interspace (8) and at least one bifurcating branch (7), at least one variable magnetic field generating device (16), at least one permanent magnetic field generating device (13) and at least one movable magnetic component (12), wherein the bifurcating branch (7) defines a first region (4) and a second region (5) of said magnetic core (6).
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: May 19, 2015
    Assignees: Sauer Danfoss Aps, Artemis Intelligent Power Ltd.
    Inventors: William Hugh Salvin Rampen, Niall James Caldwell, Uwe Bernhard Pascal Stein
  • Patent number: 9010104
    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: February 23, 2011
    Date of Patent: April 21, 2015
    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: 9003954
    Abstract: A variable displacement fluid working machine includes an inward ring and an outward ring, one of the inward ring and the outward ring including a rotatable ring cam coupled to a drive shaft, the other including a plurality of radially extending piston cylinders circumferentially spaced around the respective ring. The outward ring has first and second axially spaced structural members and a plurality of demountable blocks demountably retainable therebetween, the demountable blocks having either piston cylinders or ring cam segments. The demountable blocks are removable radially to facilitate maintenance and repair and to facilitate radial access to the inward ring.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: April 14, 2015
    Assignee: Artemis Intelligent Power Limited
    Inventors: Stephen Hugh Salter, William Hugh Salvin Rampen, Uwe Bernhard Pascal Stein, Robert George Fox