Patents by Inventor Karl D. Inglehart

Karl D. Inglehart 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 apparatus for locating internal transfer leaks within fuel cell stacks
    Patent number: 6874352
    Abstract: A method for locating a fluid leak in a fuel cell stack is disclosed. The method comprises pressurizing a first fluid stream passage with a tracer fluid, introducing a flow fluid to a second fluid stream passage, maintaining a substantially constant flow of the flow fluid through the second fluid stream passage toward an exit point of the fuel cell stack, inserting a probe, adapted to monitor for the presence of the tracer fluid in the flow fluid, into the exit point, moving the probe through the second fluid stream passage and monitoring for the presence of the tracer fluid in the flow fluid at various locations of the second fluid stream passage. An apparatus for locating a fluid leak in a fuel cell stack is also provided.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: April 5, 2005
    Assignee: Ballard Power Systems Inc.
    Inventors: Zhaoyu Wang, Stephan Lutz, Karl D. Inglehart
  • Method and apparatus for locating internal transfer leaks within fuel cell stacks
    Publication number: 20040209127
    Abstract: A method for locating a fluid leak in a fuel cell stack is disclosed. The method comprises pressurizing a first fluid stream passage with a tracer fluid, introducing a flow fluid to a second fluid stream passage, maintaining a substantially constant flow of the flow fluid through the second fluid stream passage toward an exit point of the fuel cell stack, inserting a probe, adapted to monitor for the presence of the tracer fluid in the flow fluid, into the exit point, moving the probe through the second fluid stream passage and monitoring for the presence of the tracer fluid in the flow fluid at various locations of the second fluid stream passage. An apparatus for locating a fluid leak in a fuel cell stack is also provided.
    Type: Application
    Filed: January 9, 2004
    Publication date: October 21, 2004
    Applicant: Ballard Power Systems Inc.
    Inventors: Zhaoyu Wang, Stephan Lutz, Karl D. Inglehart