Patents by Inventor Alois Anton Ehrler

Alois Anton Ehrler 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).

  • Volumetric flow metering device
    Patent number: 7263900
    Abstract: A metering device for producing a precisely metered volumetric flow is provided. The metering device comprises two displacement devices that are operated in phase opposition. In this case, the shifting speeds of the volumes of the displacement devices are adjusted such that no compensation flow takes place. In this state, the volumetric flow delivered to the device to be tested is identical to the volumetric flow taken in by the other displacement device from the pressure source.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: September 4, 2007
    Inventors: Alois Anton Ehrler, Rainer Kramer, Bodo Mickan