Patents by Inventor Gerd Kurzhals

Gerd Kurzhals 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).

  • Ceiling air outlet for air conditioning system
    Patent number: 4303007
    Abstract: An air conditioning system ceiling air outlet comprising a warm air duct for vertically downward direction of warm air, a cold air duct surrounding the warm air duct for outwardly directing cold air, the ducts terminating at their inlet ends in a common connecting stub, covering plates for the intake ends of each of the ducts and mounted in the connecting stub, the covering plates being mounted on a common axis of rotation and at an angle to each other so that when one of said ducts is closed by one of said plates, the other of said ducts is open.
    Type: Grant
    Filed: July 6, 1979
    Date of Patent: December 1, 1981
    Assignee: Gebrueder Trox GmbH
    Inventors: Hans Riegel, Gerd Kurzhals