Patents by Inventor Rittmar Von Helmolt

Rittmar Von Helmolt 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 of operating gas storage and supply system
    Patent number: 8454730
    Abstract: Various embodiments of a gas storage and supply system and its operation processes having pre-selected temperature and pressure limits are disclosed. Various temperature and pressure profiles may be used to supply stored gas to a gas consuming device.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: June 4, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Rittmar Von Helmolt, Ulrich Eberle, Dieter Hasenauer
  • METHOD OF OPERATING GAS STORAGE AND SUPPLY SYSTEM
    Publication number: 20110252962
    Abstract: Various embodiments of a gas storage and supply system and its operation processes having pre-selected temperature and pressure limits are disclosed. Various temperature and pressure profiles may be used to supply stored gas to a gas consuming device.
    Type: Application
    Filed: April 20, 2010
    Publication date: October 20, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Rittmar Von Helmolt, Ulrich Eberle, Dieter Hasenauer
  • Fuel supply system with a gas adsorption device
    Patent number: 7574996
    Abstract: Disclosed is a process of supplying a gaseous fuel from a fuel storage vessel to a secondary device.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: August 18, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Dieter Hasenauer, Ulrich Eberle, Rittmar Von Helmolt
  • FUEL SUPPLY SYSTEM WITH A GAS ADSORPTION DEVICE
    Publication number: 20090101118
    Abstract: Disclosed is a process of supplying a gaseous fuel from a fuel storage vessel to a secondary device.
    Type: Application
    Filed: October 23, 2007
    Publication date: April 23, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Dieter Hasenauer, Ulrich Eberle, Rittmar Von Helmolt
  • Fuel cell stack humidification method incorporating an accumulation device
    Patent number: 7482076
    Abstract: A method of fuel cell stack humidification is provided incorporating the use of an accumulation device. The method provides for feeding back humid anode exhaust gas of the fuel cell stack to the fuel cell inlet and switching the anode inlet and outlet of the fuel cell stack for achieving better homogeneity of humidity along the fuel cell channels.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: January 27, 2009
    Assignee: General Motors Corporation
    Inventors: Ralf Senner, Rittmar Von Helmolt
  • Fuel cell stack humidification method incorporating an accumulation device
    Patent number: 6921601
    Abstract: A method of fuel cell stack humidification is provided incorporating the use of an accumulation device. The method provides for feeding back humid anode exhaust gas of the fuel cell stack to the fuel cell inlet and switching the anode inlet and outlet of the fuel cell stack for achieving better homogeneity of humidity along the fuel cell channels.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: July 26, 2005
    Assignee: General Motors Corporation
    Inventors: Ralf Senner, Rittmar Von Helmolt
  • Fuel cell stack humidification method incorporating an accumulation device
    Publication number: 20040229087
    Abstract: A method of fuel cell stack humidification is provided incorporating the use of an accumulation device. The method provides for feeding back humid anode exhaust gas of the fuel cell stack to the fuel cell inlet and switching the anode inlet and outlet of the fuel cell stack for achieving better homogeneity of humidity along the fuel cell channels.
    Type: Application
    Filed: May 16, 2003
    Publication date: November 18, 2004
    Inventors: Ralf Senner, Rittmar Von Helmolt
  • Apparatus and method for utilizing the waste heat of an air-cooled fuel cell battery
    Patent number: 6630261
    Abstract: A heat exchange cell and to a method of utilizing the waste heat of an air-cooled fuel cell battery is described. The heat exchange cell is of a configuration similar to that of the fuel cell and, in the stack, should directly adjoin the fuel cell battery, so that the spent cooling air is utilized to heat a medium without an intermediate line.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: October 7, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Buchner, Rittmar Von Helmolt
  • Polymer electrolyte membrane fuel cell system and method for wetting and/or cooling a fuel cell stack
    Patent number: 6576357
    Abstract: A polymer electrolyte membrane fuel cell system uses a wetting and/or cooling with a liquid medium. A liquid distributor is provided in one or both axial process gas supply lines. The liquid distributor uses acoustic waves for producing droplets directly in front of the gas inlet of each fuel cell unit of a fuel cell stack and feeds the droplets to the process gas flow.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: June 10, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventor: Rittmar Von Helmolt
  • Fuel cell stack and method for assembling a fuel cell stack
    Publication number: 20030027031
    Abstract: A fuel cell stack includes at least two stacked fuel cell units which are held together by a material which has sealing and fixing properties. A method for assembling a fuel cell stack is also provided.
    Type: Application
    Filed: June 24, 2002
    Publication date: February 6, 2003
    Inventors: Manfred Baldauf, Rolf Bruck, Peter Buchner, Joachim Grosse, Jorg-Roman Konieczny, Arno Mattejat, Igor Mehltretter, Konrad Mund, Manfred Poppinger, Meike Reizig, Manfred Waidhas, Rittmar Von Helmolt
  • Fuel cell installation for driving a vehicle
    Publication number: 20030012998
    Abstract: The fuel cell installation not only provides the energy for a drive unit of a vehicle, but it is also integrated as a member of the motor vehicle body. The fuel cell system is integrated into the vehicle chassis in such a way that the assembly economizes on components and/or forms a direct load-bearing component of the vehicle chassis.
    Type: Application
    Filed: June 24, 2002
    Publication date: January 16, 2003
    Inventors: Rolf Bruck, Ulrich Gebhardt, Joachim Grosse, Jorg-Roman Konieczny, Arno Mattejat, Meike Reizig, Rittmar Von Helmolt
  • Fuel cell installation and method for operating a fuel cell installation
    Publication number: 20020187375
    Abstract: A fuel cell installation and a method for operating a fuel cell installation with a dynamic power control are provided. The dynamic power control is achieved by additionally connecting at least one subsystem which is kept ready for operation, a starter system and/or a low-voltage unit for nighttime operation and/or an on-board power supply.
    Type: Application
    Filed: January 7, 2002
    Publication date: December 12, 2002
    Inventors: Manfred Baldauf, Rolf Bruck, Armin Datz, Ulrich Gebhardt, Joachim Grosse, Jorg-Roman Konieczny, Konrad Mund, Manfred Poppinger, Meike Reizig, Manfred Waidhas, Rittmar Von Helmolt
  • High-temperature polymer electrolyte membrane (HTM) fuel cell, HTM fuel cell installation, method for operating an HTM fuel cell and/or an HTM fuel cell installation
    Publication number: 20020119357
    Abstract: High-temperature polymer electrolyte membrane (HTM) fuel cells, installations including HTM fuel cells, methods for operating an HTM fuel cell, and an HTM fuel cell installation apply the principle of the known PEM fuel cell and overcomes the major drawback of this fuel cell. By selecting a new electrolyte and changing the operating conditions, in particular the temperature and the pressure, the fuel cells do not depend on water content.
    Type: Application
    Filed: January 7, 2002
    Publication date: August 29, 2002
    Inventors: Manfred Baldauf, Rolf Brueck, Armin Datz, Joachim Grosse, Jorg-Roman Konieczny, Manfred Poppinger, Meike Reizig, Rittmar Von Helmolt
  • Method for operating a liquid-cooled fuel cell battery, and associated fuel cell battery
    Publication number: 20020081467
    Abstract: A liquid-cooled fuel cell battery and a method for operating such a battery includes reducing the heat capacity of the fuel cell battery at a start time by removing at least some of the cooling liquid from the cooling system when the battery is being switched off to improve the starting performance of the battery.
    Type: Application
    Filed: November 19, 2001
    Publication date: June 27, 2002
    Inventors: Guenter Luft, Konrad Mund, Rittmar Von Helmolt
  • Fuel cell battery with heating and an improved cold-start performance, and method for cold-starting of a fuel cell battery
    Publication number: 20020071972
    Abstract: A fuel cell battery is described with a heater and an improved cold-start performance, and to a method for cold-starting of a battery of this type. The heater, such as for example a reformer, is started first, and the operating heat from the heater is utilized to heat the fuel cell stack.
    Type: Application
    Filed: September 10, 2001
    Publication date: June 13, 2002
    Inventors: Ulrich Gebhardt, Gunter Luft, Konrad Mund, Manfred Waidhas, Rittmar Von Helmolt
  • Mehtod for cold-starting a fuel cell battery and fuel cell battery suitable therefor
    Publication number: 20020058165
    Abstract: A fuel cell battery having an improved cold-starting performance and a method for cold-starting a fuel cell battery, use reaction heat of an oxyhydrogen gas reaction in the fuel cell for heating. Reaction gas is simply supplied as required into the reaction chamber during starting, so that an electrode of the fuel cell unit acts as a catalytic burner.
    Type: Application
    Filed: September 10, 2001
    Publication date: May 16, 2002
    Inventors: Ulrich Gebhardt, Gunter Luft, Konrad Mund, Manfred Waidhas, Rittmar Von Helmolt
  • Liquid-cooled fuel cell battery and method for operating it
    Publication number: 20020009648
    Abstract: A fuel cell battery is described which has a liquid cooling. The fuel cell battery has a primary cooling circuit and a secondary cooling circuit with a heat exchanger connected between them. The heat exchanger is structurally integrated into the battery, so that the length of the primary cooling circuit is minimized and the primary cooling circuit requires no external lines, i.e. lines that lead out of the battery.
    Type: Application
    Filed: July 5, 2001
    Publication date: January 24, 2002
    Inventors: Peter Buchner, Rittmar Von Helmolt
  • Apparatus and method for utilizing the waste heat of an air-cooled fuel cell battery
    Publication number: 20010049041
    Abstract: A heat exchange cell and to a method of utilizing the waste heat of an air-cooled fuel cell battery is described. The heat exchange cell is of a configuration similar to that of the fuel cell and, in the stack, should directly adjoin the fuel cell battery, so that the spent cooling air is utilized to heat a medium without an intermediate line.
    Type: Application
    Filed: February 12, 2001
    Publication date: December 6, 2001
    Inventors: Peter Buchner, Rittmar Von Helmolt
  • FUEL CELL SYSTEM FOR AN ELECTRIC VEHICLE
    Publication number: 20010049040
    Abstract: The invention is directed to a fuel cell system for an electric vehicle that is driven with (at least among other things) fuel cells, whereby the—preferably but not exclusively air-cooled—fuel cell system is installed such that the dynamic pressure of the relative wind drives the cooling system. A fuel cell stack is preferably located at the radiator of the vehicle and the relative wind directly cools the individual fuel cells.
    Type: Application
    Filed: January 14, 1999
    Publication date: December 6, 2001
    Inventors: HORST GRUNE, PETER BUCHNER, RITTMAR VON HELMOLT
  • Liquid-cooled fuel cell battery
    Patent number: 6309774
    Abstract: The invention is directed to a battery with liquid cooling composed of at least two fuel cells that respectively comprise a negative pole plate, a membrane electrode unit and a positive pole plate that are connected to one another mechanically rigidly, gas-tight and electronically insulating by a frame element, whereby the battery is immersed into a coolant bath.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: October 30, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Buchner, Rittmar Von Helmolt, Manfred Waidhas