Patents by Inventor Jan Willem J. W. Van Rijswijk

Jan Willem J. W. Van Rijswijk 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 device for determining a characteristic value that is representative of the condition of a gas
    Patent number: 7377152
    Abstract: The invention relates to a device and methods for characterizating flowing substances, liquid or gas. The device includes: a transport duct with a heating or a cooling element; a temperature difference sensor having a temperature measurement cell downstream of the heating or cooling element and means to determine a temperature difference in the flowing substance upstream and downstream of the heating or cooling element; a flow control means having flow measurement means for measuring a mass flow characteristic and a flow correction means for correcting for measured mass flow variations; and an evaluation means for evaluating a characterizing feature of the flowing substance comprising a function relating temperature differences measured on one or more calibration substances to one or more characterizing features of the flowing substance. Various embodiments relate to the related use and methods of the device for identification and control of the flowing substance.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: May 27, 2008
    Assignee: Brooks Instrument, LLC
    Inventors: Kees C. J. M. N. Brekelmans, Jan Willem J. W. Van Rijswijk