Patents by Inventor Stefan Hofbauer

Stefan Hofbauer 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).

  • Cyclone heat exchanger
    Patent number: 5566467
    Abstract: A cyclone heat exchanger including a plurality of arranged one above another cylone separators forming, respectively, a plurality of heat exchange stages, a first inlet for delivering raw meal to the heat exchanger, a first outlet for delivering the heated raw meal from the heat exchanger, a second inlet for delivering a hot gas to the heat exchanger, a second outlet for delivering the cooled gas from the heat exchanger, and at least one motor-driven conveyor device arranged between at least two heat exchange stages, located immediately one above the other, and defined by respective cyclone separators for transporting the raw meal between the stages.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: October 22, 1996
    Assignee: Heidelberger Zement Aktiengesellschaft
    Inventor: Stefan Hofbauer