Patents by Inventor Uwe Bernhard Pascal Stein

Uwe Bernhard Pascal Stein 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: 20120000554
    Abstract: An electronically controlled valve for regulating the supply of fluid between a working chamber of a fluid working machine and a manifold, which valve includes a pilot valve and a pilot valve elastic member charged in use by the movement of the armature towards the electromagnet during closure of the valve to provide a return force urging the pilot valve sealing member away from the pilot valve seat. The valve is especially useful as the low pressure valve of a fluid working motor.
    Type: Application
    Filed: March 16, 2010
    Publication date: January 5, 2012
    Applicant: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Fergus Robert Mcintyre, Uwe Bernhard Pascal Stein
  • Publication number: 20110315251
    Abstract: An electronically controlled valve includes a travelling member with a sealing member and operable between a closed position in which the sealing member forms a seal with a valve seat, and an open position. The valve further has a decelerating mechanism operable to slow the movement of the armature during closure of the valve. The sealing member and armature are decoupled and thereby moveable relative to each other such that the armature can continue to move and decelerate due to the action of the damping mechanism after the sealing member has impacted the valve seat. The peak deceleration force on the armature is thereby reduced, increasing the lifetime of the valve or the maximum rate at which it can be closed without damage.
    Type: Application
    Filed: March 16, 2010
    Publication date: December 29, 2011
    Applicant: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: William Hugh Salvin Rampen, Uwe Bernhard Pascal Stein, Fergus Robert Mcintyre, Gordon Paul Voller, Colin Francis Souza
  • Publication number: 20110315003
    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 characterised 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: Application
    Filed: December 22, 2009
    Publication date: December 29, 2011
    Inventors: Niall James Caldwell, William Hugh Salvin Rampen, Uwe Bernhard Pascal Stein
  • Publication number: 20110315004
    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: Application
    Filed: December 22, 2009
    Publication date: December 29, 2011
    Inventors: Niall James Caldwell, Uwe Bernhard Pascal Stein, William Hugh Salvin Rampen
  • Publication number: 20110268590
    Abstract: A fluid working machine, operable to carry out a motoring cycle under at least some circumstances, comprises a controller (12) and a working chamber (2) of cyclically varying volume. The working chamber has a high pressure valve (18) associated therewith to control the connection of the working chamber to a high pressure manifold (20), and an electronically controllable primary low pressure valve (14) to control the connection of the working chamber to a low pressure manifold. The controller is operable to actively control at least the primary low pressure valve, in phased relationship to cycles of working chamber volume, to determine the net displacement of fluid by the working chamber on a cycle by cycle basis. The fluid working machine is adapted to release pressurised fluid from the working chamber prior to the opening of the primary low-pressure valve, during a motoring cycle. This facilitates the opening of the primary low pressure valve.
    Type: Application
    Filed: June 22, 2009
    Publication date: November 3, 2011
    Applicant: Artemis Intelligent Power Limited
    Inventors: Uwe Bernhard Pascal Stein, Michael Richard Fielding, Stephen Michael Laird, Alasdair Ian Fletcher Robertson
  • Publication number: 20110253918
    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: Application
    Filed: October 27, 2009
    Publication date: October 20, 2011
    Applicants: ARTEMIS INTELLIGENT POWER LTD, SAUER-DANFOSS APS
    Inventors: William Hugh Salvin Rampen, Niall James Caldwell, Uwe Bernhard Pascal Stein
  • Publication number: 20110226342
    Abstract: A fluid working machine comprises a controller (12) and a working chamber (2) of cyclically varying volume. The working, chamber has both an electronically controllable primary low pressure valve (14) and a secondary low pressure port (22) associated therewith, each of which is openable and closable in phased relation to cycles of working chamber volume to bring the working chamber into fluid communication with a low pressure manifold (16, 26). At least the primary low pressure valve is under the active control of the controller to enable the controller to determine the net displacement of fluid by the working chamber on a cycle by cycle basis. The primary low pressure valve and the secondary low pressure port are openable concurrently during a portion of at least some cycles of working chamber volume to enable fluid to flow into or out of the working chamber concurrently through both the primary low pressure valve and the secondary low pressure port.
    Type: Application
    Filed: June 22, 2009
    Publication date: September 22, 2011
    Applicants: ARTEMIS INTELLIGENT POWER LIMITED, SAUER-DANFOSS ApS
    Inventors: Uwe Bernhard Pascal Stein, Niall James Caldwell
  • Publication number: 20110209783
    Abstract: An electronically actuatable valve assembly having a primary face seating valve, including a primary valve member, and a secondary valve, including a secondary valve member. The secondary valve opens before the primary valve to equilibrate pressure across the primary valve member and thereby facilitate opening of the primary valve member. The secondary valve is coupled to an armature which moves from a first position to a second position, in use, attracted by an electromagnet. The coupling between the armature and the secondary valve is configured to enable the armature to begin to move from the first position without movement of the secondary valve.
    Type: Application
    Filed: September 9, 2009
    Publication date: September 1, 2011
    Applicant: Artemis Intelligent Power Limited
    Inventors: Uwe Bernhard Pascal Stein, Gordon Paul Voller, Stephen Michael Laird
  • Publication number: 20110209784
    Abstract: An electronically actuatable valve assembly including a valve member comprising a ferromagnetic member, and a magnetic circuit adapted to direct magnetic flux through the ferromagnetic member when the valve member is spaced apart from its valve seat, to hold the primary valve open.
    Type: Application
    Filed: September 9, 2009
    Publication date: September 1, 2011
    Applicant: Artemis Intelligent Power Limited
    Inventors: Uwe Bernhard Pascal Stein, Gordon Paul Voller
  • Publication number: 20110123354
    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: January 28, 2011
    Publication date: May 26, 2011
    Applicant: ARTEMIS INTELLIGENT POWER LIMITED
    Inventors: Uwe Bernhard Pascal Stein, Niall James Caldwell, William Hugh Salvin Rampen, Jonathan Paul Almond
  • Publication number: 20100243067
    Abstract: A hydraulic machine has at least one working chamber (11) of cyclically changing volume, and low- and high-pressure valve means (15, 13) to control the connection of the or each chamber to low- and high-pressure lines (16, 14) respectively. A method of operating the machine includes holding the low-pressure valve means (15) closed during at least an entire cycle of the chamber (11), starting at minimum chamber volume, such that gas dissolved in liquid in the chamber is released therefrom during an expansion of the chamber volume and re-dissolved during a reduction thereof.
    Type: Application
    Filed: February 2, 2007
    Publication date: September 30, 2010
    Inventors: Uwe Bernhard Pascal Stein, Niall James Caldwell, William Hugh Salvin Rampen
  • Publication number: 20100175551
    Abstract: A piston ring (10) for forming a seal between a piston (26) and piston housing (28). The piston ring (10) has first and second orthogonal axes (12, 14) and a body portion (18) which is resiliently deformable in the direction of the first axis (12) and is substantially rigid in the direction of the second axis (14).
    Type: Application
    Filed: January 12, 2010
    Publication date: July 15, 2010
    Applicant: Sauer-Danfoss ApS
    Inventors: Uwe Bernhard Pascal Stein, Luke Wadsley
  • Publication number: 20100084587
    Abstract: In a fluid-working machine having a high-pressure line and a working chamber, a valve arrangement is arranged to control fluid flow from the high-pressure line to the working chamber. The valve arrangement comprises a main valve having a valve element arranged to provide sealing contact with a valve seat, and an auxiliary valve comprising an electromagnetically-movable valve member for equalising pressure on either side of the main valve by placing the working chamber in direct fluid communication with the high-pressure line. The electromagnetically-movable valve member may comprise a spool valve member or a poppet valve member.
    Type: Application
    Filed: September 8, 2006
    Publication date: April 8, 2010
    Inventor: Uwe Bernhard Pascal Stein
  • Publication number: 20090317266
    Abstract: The present invention provides a hydraulic pump for use in driving a load with a control modulation system which modulates a primary control signal in order to accommodate variations in secondary changeable parameters which require control at a higher frequency or have a lower latency.
    Type: Application
    Filed: July 27, 2007
    Publication date: December 24, 2009
    Inventors: William Hugh Salvin Rampen, Uwe Bernhard Pascal Stein, Michael Richard Fielding, Niall James Caldwell
  • Publication number: 20090210120
    Abstract: A variable transmission comprises a first fluid working machine (1) for connection to a prime mover (2), a second fluid working machine (5) for connection to a mechanical load (6) and a fluid system linking the first and second working machines, the fluid system having a high-pressure side (3) and a low-pressure side (4) each connected to both said first and said second fluid working machines (1, 5), a fluid accumulator (7) on the high-pressure side, a means to admit fluid from the reservoir to the low-pressure side and a pressure control valve to maintain the correct pressure in the low-pressure side, wherein the second fluid working machine (5) includes chambers of variable volume having electronically controllable valves such that each of said chambers has pumping, motoring and idling modes of operation, and the second fluid working machine (5) is operable to both source fluid to and sink fluid from each of said high-pressure side (3) and said low-pressure side (4).
    Type: Application
    Filed: July 26, 2007
    Publication date: August 20, 2009
    Inventors: Uwe Bernhard Pascal Stein, Michael Richard Fielding
  • Publication number: 20080245322
    Abstract: A valvetrain control arrangement for an internal combustion engine. A fluid-working machine (1) has working chambers (3) of cyclically varying volume, each connected to a piston actuator (4) which is capable of moving an intake or exhaust valve in the internal combustion engine. The engine crankshaft (2) drives a crankshaft of the fluid-working machine at the same speed as the engine. Each working chamber (3) is linked to a low-pressure manifold (7) by a venting valve (6), the venting valve being normally open but electromagnetically closable by a signal from an electronic sequencing means (8) which operates in timed relationship to the engine crankshaft phase.
    Type: Application
    Filed: February 27, 2006
    Publication date: October 9, 2008
    Inventors: Uwe Bernhard Pascal Stein, Niall James Caldwell, William Hugh Salvin Rampen