Patents by Inventor Hanns-Ulrich Ettl

Hanns-Ulrich Ettl 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).

  • Aircraft cabin pressure control system
    Patent number: 5520578
    Abstract: A cabin pressure control system for aircraft includes a controller for receiving and comparing set point and actual values for an aircraft cabin pressure. A speed-controlled drive for an air outlet valve is connected to the controller for triggering the valve as a function of the comparison. A remote indication is issued to the controller solely regarding a newly established actual cabin pressure, without a remote position indication from the valve.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: May 28, 1996
    Assignee: Nord-Micro Elektronik Feinmechanik AG
    Inventors: Alexander Bloch, Hanns-Ulrich Ettl, Peter Kuhn