Patents by Inventor Bernd Kallfass

Bernd Kallfass 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).

  • Air conditioning unit with an inner heat transfer unit
    Patent number: 6751983
    Abstract: The invention relates to an air conditioning unit with a coolant circuit which consists of a compressor, an evaporator, a collector located at the low pressure side between the evaporator and the compressor and an inner heat transfer unit with a beat transfer channel located at the high pressure side and a low pressure side beat transfer channel. According to the invention, the inner heat transfer unit has an at least segmentally spiraling and/or spiral-shaped steps between the outer and inner pipe of a coaxial pipe system.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: June 22, 2004
    Assignee: Behr GmbH & Co.
    Inventors: Bernd Dienhart, Hans-Joachim Krauss, Hagen Mittelstrass, Karl-Heinz Staffa, Christoph Walter, Bernd Kallfass