Patents by Inventor Rolf Graf

Rolf Graf 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: 20200253194
    Abstract: The present invention relates to a perfusion loop assembly for an ex vivo liver perfusion including: a pump for providing a fluid flow of a perfusion fluid through a first branch line and a second branch line; the first branch line being configured to provide a first portion of the perfusion fluid to the hepatic artery of the liver; the first branch line being coupled with a first gas exchanger, the second branch line being configured to provide a second portion of the perfusion fluid to the portal vein of the liver; the second branch line further including a first valve for controlling the flow of the perfusion fluid into the portal vein of the liver, a liver chamber assembly configured to hold the liver ex vivo, a liver outlet line attached to the vena cava of the ex vivo liver, at least one reservoir connected to the liver outlet and upstream from the pump.
    Type: Application
    Filed: July 21, 2017
    Publication date: August 13, 2020
    Inventors: Pierre-Alain Clavien, Philipp Rudolf von Rohr, Philipp Dutkowski, Rolf Graf, Martin Schuler, Dilmurodjon Eshmuminov, Brian Burg
  • Patent number: 10742144
    Abstract: An apparatus for controlling a fluid pump for a motor vehicle includes: a first controller configured to actuate an electric prime mover of the fluid pump by impressing at least one motor current with an adapted current intensity and an adapted waveform; and a second controller configured to detect a rotational speed of the electric prime mover and to apply an adapted voltage to the electric prime mover on the basis of the detected rotational speed.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: August 11, 2020
    Assignee: Continental Automotive GmbH
    Inventors: Rolf Graf, Klaus Kronenberg
  • Publication number: 20200141374
    Abstract: An emergency operation method for actuating a fuel pump after a first temperature threshold for an actuation electronics system of the fuel pump has been exceeded including reducing a power consumption of an electric motor that drives a pump stage by the actuation electronics system by reducing a rotational speed until a monitored temperature value falls below a second temperature threshold below the first temperature threshold. Emergency operation method is initiated after the first temperature threshold is exceeded by a fault signal output by the actuation electronics system to an engine control unit is communicatively connected to the actuation electronics system. The fault signal, as long as it is output, is used to suppress a specification for the rotational speed of the electric motor on the part of the engine control unit and instead to specify the rotational speed by way of the actuation electronics system.
    Type: Application
    Filed: June 18, 2018
    Publication date: May 7, 2020
    Inventor: Rolf GRAF
  • Patent number: 10619591
    Abstract: A method for operating a fuel feed pump, the fuel feed pump having a pump system and an electrically commutated electric motor, the pump system being drivable by the electric motor, includes: detecting fluctuation in circular motion of the pump system over a rotational speed of the pump system to obtain a value of the fluctuation; standardizing the detected value of the fluctuation to obtain a standardized valise; and in a case in which a predefinable limit is exceeded by the standardized value, limiting a gradient of change in the rotational speed of the pump system.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: April 14, 2020
    Assignee: Continental Automotive GmbH
    Inventors: Rolf Graf, Matthias Bludau
  • Patent number: 10563608
    Abstract: A delivery device for delivering a medium in a vehicle and for limiting a system pressure of the delivery device includes a vehicle pump, which is driven by an electric motor. The electric motor is controlled by a controller, the controller being configured to detect an actual rotational speed of the electric motor and an actual operating current of the electric motor. If the actual operating current of the electric motor exceeds a predefined operating current limit value, the controller is configured to generate a first signal relating to a system pressure being exceeded. The predefined operating current limit value is dependent on the actual rotational speed of the electric motor.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: February 18, 2020
    Assignee: Continental Automotive GmbH
    Inventor: Rolf Graf
  • Patent number: 10443534
    Abstract: A fuel pump of a motor vehicle includes: a pump stage configured to induce fuel from a fuel tank; an electric motor configured to drive the pump stage; and control electronics configured to supply the electric motor with electrical current. The control electronics includes a memory storing a low temperature start program and a standard start program. The control electronics are connected to a temperature sensor and a selector configured to select the start program depending on the sensed temperature.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: October 15, 2019
    Assignee: Continental Automotive GmbH
    Inventors: Rolf Graf, Sebastian Koerner
  • Patent number: 10415521
    Abstract: A delivery device for delivering a medium and for heating the medium to be delivered, having a vehicle pump, an electric motor for driving the vehicle pump and a control unit for controlling the electric motor. For heating the medium in the vehicle pump, the control unit is designed to generate a first alternating electrical current in a conductor winding of the electric motor. This first alternating electrical current induces eddy currents in a component of the delivery device, by which the medium can be heated.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: September 17, 2019
    Assignee: Continental Automotive GmbH
    Inventor: Rolf Graf
  • Patent number: 10132264
    Abstract: A method for controlling an electric motor of a vehicle pump used to deliver a medium. According to the method, a period required for at least one partial revolution of a rotor of the electric motor is determined. The fluctuations during the period can represent a measurement of the true running of the electric motor. The speed of the electric motor can be altered depending on the deviation of the period from a comparative value. As a result, the true running of the electric motor can be guaranteed once again.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: November 20, 2018
    Assignee: Continental Automotive GmbH
    Inventors: Rolf Graf, Bernhard Lukas
  • Publication number: 20180030917
    Abstract: A method for operating a fuel feed pump, the fuel feed pump having a pump system and an electrically commutated electric motor, the pump system being drivable by the electric motor, includes: detecting fluctuation in circular motion of the pump system over a rotational speed of the pump system to obtain a value of the fluctuation; standardizing the detected value of the fluctuation to obtain a standardized valise; and in a case in which a predefinable limit is exceeded by the standardized value, limiting a gradient of change in the rotational speed of the pump system.
    Type: Application
    Filed: February 11, 2016
    Publication date: February 1, 2018
    Inventors: Rolf GRAF, Matthias BLUDAU
  • Publication number: 20180017050
    Abstract: A device for detecting an operating pressure of a fluid pump for a motor vehicle includes: a rotational speed detector configured to detect a rotational speed of the fluid pump; a pump current detector configured to detect at least one current of the fluid pump; a memory configured to store a pump current/rotational speed performance map with at least one pressure reference point; and a pressure determining device configured to determine a fluid pressure that prevails in the fluid pump based on the detected rotational speed, the detected current and the stored pump current/rotational speed performance map.
    Type: Application
    Filed: October 21, 2015
    Publication date: January 18, 2018
    Inventors: Rolf GRAF, Gerald BEHRENDT
  • Patent number: 9857381
    Abstract: The present invention relates to a reliable method of prediction of sepsis in humans after a trauma, wherein the level of pancreatic stone protein/regenerating protein (PSP/reg) is determined in serum, and a high level is indicative of the development of sepsis at early stages of the disease. Furthermore a method of determination of PSP/reg levels in serum is described.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: January 2, 2018
    Assignee: UNIVERSITAET ZUERICH
    Inventors: Rolf Graf, Daniel Bimmler, Marius Keel
  • Publication number: 20170363050
    Abstract: A delivery device for delivering a medium and for heating the medium to be delivered, having a vehicle pump, an electric motor for driving the vehicle pump and a control unit for controlling the electric motor. For heating the medium in the vehicle pump, the control unit is designed to generate a first alternating electrical current in a conductor winding of the electric motor. This first alternating electrical current induces eddy currents in a component of the delivery device, by which the medium can be heated.
    Type: Application
    Filed: December 16, 2015
    Publication date: December 21, 2017
    Inventor: Rolf GRAF
  • Publication number: 20170363034
    Abstract: A delivery device for delivering a medium in a vehicle and for limiting a system pressure of the delivery device includes a vehicle pump, which is driven by an electric motor. The electric motor is controlled by a controller, the controller being configured to detect an actual rotational speed of the electric motor and an actual operating current of the electric motor. If the actual operating current of the electric motor exceeds a predefined operating current limit value, the controller is configured to generate a first signal relating to a system pressure being exceeded. The predefined operating current limit value is dependent on the actual rotational speed of the electric motor.
    Type: Application
    Filed: December 16, 2015
    Publication date: December 21, 2017
    Inventor: Rolf GRAF
  • Publication number: 20170338758
    Abstract: An apparatus for controlling a fluid pump for a motor vehicle includes: a first controller configured to actuate an electric prime mover of the fluid pump by impressing at least one motor current with an adapted current intensity and an adapted waveform; and a second controller configured to detect a rotational speed of the electric prime mover and to apply an adapted voltage to the electric prime mover on the basis of the detected rotational speed.
    Type: Application
    Filed: October 21, 2015
    Publication date: November 23, 2017
    Inventors: Rolf GRAF, Klaus KRONENBERG
  • Publication number: 20170314548
    Abstract: A method for operating a speed-controlled fluid pump includes: providing an electrical control current for the fluid pump; providing a maximum value for the electrical control current, which maximum value corresponds to a maximum permissible pressure at an outlet side of the fluid pump; providing a threshold value for the control current, the threshold value corresponding to a further maximum permissible pressure at the outlet side of the fluid pump and is predefined in dependence upon at least one boundary condition, the threshold value being less than the maximum value for the electrical control current; and controlling the fluid pump with not more than the threshold value for the control current, if it has been determined that the at least one boundary condition holds, so as to limit the pressure at the outlet side of the fluid pump to a value provided for the at least one boundary condition.
    Type: Application
    Filed: November 2, 2015
    Publication date: November 2, 2017
    Inventors: Rolf GRAF, Heiko JAUSEL
  • Publication number: 20170253246
    Abstract: The electric energy provided to some loads in a vehicle is limited or controlled by a power controller that receives a signal specifying how much power should be provided to the load. When the link providing the power-specifying signal is lost, the controller adjusts the power to the load according to an internal temperature of the controller instead of simply providing full power to the load.
    Type: Application
    Filed: May 17, 2017
    Publication date: September 7, 2017
    Inventors: Rolf GRAF, Matthias BLUDAU
  • Patent number: 9579600
    Abstract: Sulfurous fuel and CaCO3-containing sorbent are combusted in a furnace of a circulating fluidized bed boiler. A dry circulating fluidized bed scrubber includes a reactor with water and Ca(OH)2 feeds for converting SO2 in the exhaust gas to CaSO3 and CaSO4 and a dust separator in gas flow connection with the reactor. A discharge removes CaO-containing bottom ash from the furnace. A classifier classifies a portion of the removed CaO-containing bottom ash into coarse and finer portions. A fine ash channel conveys some of the finer bottom ash portion from the classifier to a grinder. A ground ash channel conveys some of the ground bottom ash portion from the grinder to a hydrator to hydrate CaO in the ash to Ca(OH)2. A hydrated ash channel conveys some of the Ca(OH)2 from the hydrator to the dry circulating fluidized bed scrubber as a sorbent.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: February 28, 2017
    Assignee: AMEC FOSTER WHEELER ENERGIA OY
    Inventors: Tobias Brand, Reijo Kuivalainen, Maria-Helena Möbs, Rolf Graf
  • Patent number: 9533257
    Abstract: A scrubber for removing pollutant compounds from a gas stream. At least one gas channel introduces the gas stream to a lower portion of the scrubber. An inlet chamber directs the gas stream upwards to form a vertical gas stream. A constriction section has a vertical axis of symmetry and includes a centrally arranged venturi nozzle, and is above and in flow connection with an upper end of the inlet chamber for accelerating the vertical gas stream. A reaction chamber is arranged above and in flow connection with the constriction section. A reagent in the reaction chamber converts pollutant compounds in the gas stream to reaction products. A discharge channel in flow connection with the reaction chamber discharges gas and particles including the reaction products from the reaction chamber. A particle separator separates particles from the gas. A return channel recycles a portion of the particles to the reaction chamber.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: January 3, 2017
    Assignee: AMEC FOSTER WHEELER ENERGIA OY
    Inventors: Winfried Gutperl, Rolf Graf, Harald Kessler, Reijo Kuivalainen
  • Publication number: 20160332117
    Abstract: A scrubber for removing pollutant compounds from a gas stream. At least one gas channel introduces the gas stream to a lower portion of the scrubber. An inlet chamber directs the gas stream upwards to form a vertical gas stream. A constriction section has a vertical axis of symmetry and includes a centrally arranged venturi nozzle, and is above and in flow connection with an upper end of the inlet chamber for accelerating the vertical gas stream. A reaction chamber is arranged above and in flow connection with the constriction section. A reagent in the reaction chamber converts pollutant compounds in the gas stream to reaction products. A discharge channel in flow connection with the reaction chamber discharges gas and particles including the reaction products from the reaction chamber. A particle separator separates particles from the gas. A return channel recycles a portion of the particles to the reaction chamber.
    Type: Application
    Filed: January 31, 2014
    Publication date: November 17, 2016
    Inventors: Winfried Gutperl, Rolf Graf, Harald Kessler, Reijo Kuivalainen
  • Publication number: 20160265471
    Abstract: A method for controlling an electric motor of a vehicle pump used to deliver a medium. According to the method, a period required for at least one partial revolution of a rotor of the electric motor is determined. The fluctuations during the period can represent a measurement of the true running of the electric motor. The speed of the electric motor can be altered depending on the deviation of the period from a comparative value. As a result, the true running of the electric motor can be guaranteed once again.
    Type: Application
    Filed: October 14, 2014
    Publication date: September 15, 2016
    Inventors: Rolf GRAF, Bernhard LUKAS