Patents by Inventor Rudolf Bierl

Rudolf Bierl 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).

  • Device and method for calibration of a mass flow sensor
    Publication number: 20060150708
    Abstract: A device and method for calibration of a mass flow sensor (14) employs a flow channel and a holder for the mass flow sensor in the flow channel. An adjustable throttle device is provided between the holder and a connection to a pump during a calibrating operation to operate on the basis of a predetermined time/displacement profile by means of a control device. During operation of the pump, the throttle device generates a supercritical flow with which a flowing medium has the speed of sound in the narrowest cross section of the throttle device.
    Type: Application
    Filed: August 8, 2003
    Publication date: July 13, 2006
    Inventors: Rudolf Bierl, Manfred Schweimeier