Patents by Inventor Hubert Urban

Hubert Urban 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).

  • Method and arrangement for controlling a switching connection between the electrical outputs of a fuel cell and an isolated electrical network
    Patent number: 7709977
    Abstract: The invention relates to a method and apparatus for controlling and for setting the switching states of switches which are connected to the electrical poles or outputs of a fuel cell and which are followed by a network, which is fed from the fuel cell, and has loads. The invention is preferably suitable for use in a vehicle. The switches are opened if the fuel cell and/or the vehicle assume critical states.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: May 4, 2010
    Assignee: NuCellSys GmbH
    Inventors: Axel Jansen, Josef Sonntag, Hubert Urban
  • Method for controlling the quality of the coolant for fuel cell systems
    Patent number: 7477049
    Abstract: A method for controlling the quality of the coolant for fuel cell systems, it being proposed to measure and monitor the insulation resistance of the load circuit of the fuel cell system. It has become apparent that there is a functional, uniquely defined relationship between the measured insulation resistance and the electrical conductivity of the coolant so that a separate measurement of the electrical conductivity by means of corresponding sensor systems and evaluation means can be dispensed with in the present invention.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: January 13, 2009
    Assignee: NuCellSys GmbH
    Inventors: Anton Sonntag, Josef Sonntag, Hubert Urban
  • Method and arrangement for controlling a switching connection between the electrical outputs of a fuel cell and an isolated electrical network
    Publication number: 20060055246
    Abstract: The invention relates to a method and apparatus for controlling and for setting the switching states of switches which are connected to the electrical poles or outputs of a fuel cell and which are followed by a network, which is fed from the fuel cell, and has loads. The invention is preferably suitable for use in a vehicle. The switches are opened if the fuel cell and/or the vehicle assume critical states.
    Type: Application
    Filed: August 18, 2005
    Publication date: March 16, 2006
    Inventors: Axel Jansen, Josef Sonntag, Hubert Urban
  • Method for controlling the quality of the coolant for fuel cell systems
    Publication number: 20050140353
    Abstract: A method for controlling the quality of the coolant for fuel cell systems, it being proposed to measure and monitor the insulation resistance of the load circuit of the fuel cell system. It has become apparent that there is a functional, uniquely defined relationship between the measured insulation resistance and the electrical conductivity of the coolant so that a separate measurement of the electrical conductivity by means of corresponding sensor systems and evaluation means can be dispensed with in the present invention.
    Type: Application
    Filed: October 26, 2004
    Publication date: June 30, 2005
    Inventors: Anton Sonntag, Josef Sonntag, Hubert Urban
  • Method and device for insulation monitoring of a DC network
    Patent number: 6879164
    Abstract: A method and device for insulation monitoring of an electrically insulated DC network by measuring of the insulation resistance using galvanic isolation between a measuring resistor which is connected to ground, and a measuring pulse generator, and a measurement-data acquisition device, which eliminates some of the effect that noise in the DC network would otherwise have on the measurement.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: April 12, 2005
    Assignee: Ballard Power Systems AG
    Inventors: Gerald Kollenda, Hubert Urban
  • Method for controlling the quality of the coolant for fuel cell systems
    Patent number: 6830843
    Abstract: A method for controlling the quality of the coolant for fuel cell systems, it being proposed to measure and monitor the insulation resistance of the load circuit of the fuel cell system. It has become apparent that there is a functional, uniquely defined relationship between the measured insulation resistance and the electrical conductivity of the coolant so that a separate measurement of the electrical conductivity by means of corresponding sensor systems and evaluation means can be dispensed with in the present invention.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: December 14, 2004
    Assignee: Ballard Power Systems AG
    Inventors: Anton Sonntag, Josef Sonntag, Hubert Urban
  • Method and device for insulation monitoring of a DC network
    Publication number: 20030234653
    Abstract: A method and device for insulation monitoring of an electrically insulated DC network by measuring of the insulation resistance using galvanic isolation between a measuring resistor which is connected to ground, and a measuring pulse generator, and a measurement-data acquisition device, which eliminates some of the effect that noise in the DC network would otherwise have on the measurement.
    Type: Application
    Filed: February 6, 2003
    Publication date: December 25, 2003
    Applicant: Ballard Power Systems AG
    Inventors: Gerald Kollenda, Hubert Urban
  • Method for controlling the quality of the coolant for fuel cell systems
    Publication number: 20020106543
    Abstract: A method for controlling the quality of the coolant for fuel cell systems, it being proposed to measure and monitor the insulation resistance of the load circuit of the fuel cell system. It has become apparent that there is a functional, uniquely defined relationship between the measured insulation resistance and the electrical conductivity of the coolant so that a separate measurement of the electrical conductivity by means of corresponding sensor systems and evaluation means can be dispensed with in the present invention.
    Type: Application
    Filed: January 22, 2002
    Publication date: August 8, 2002
    Applicant: XCELLSIS AG.
    Inventors: Anton Sonntag, Josef Sonntag, Hubert Urban