Patents by Inventor Per W. Danzl

Per W. Danzl 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).

  • Gas turbine engine fuel control system having a transfer valve and a shutoff valve and a common controller therefor
    Patent number: 7587900
    Abstract: A fuel control system for a gas turbine engine includes a metering valve for metering a flow of fuel, a throttling valve for maintaining a pressure drop across the metering valve, the throttling valve being shiftable between an open state and a shutoff state blocking an outlet of the metering valve, a primary control pressure supply for supplying a primary control pressure to the metering valve for controlling the position of the metering valve, a backup control pressure supply, a transfer valve shiftable between a first position connecting the primary control pressure to supply to the metering valve and a second position connecting the backup control pressure to the metering valve, and an electrohydraulic servovalve (EHSV) operably connected to the throttling valve and the transfer valve and controlling the state of the transfer valve and the position of the throttling valve. Also a method for controlling a transfer valve and a throttling valve.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: September 15, 2009
    Assignee: Honeywell International Inc.
    Inventors: Jeffrey Dugan Shelby, Paul W. Futa, Jr., Matthew A. Arend, Per W. Danzl