Patents by Inventor Frederick S. Billig

Frederick S. Billig 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).

  • Integrated air inlet system for multi-propulsion aircraft engines
    Patent number: 7216474
    Abstract: An air inlet duct for an air-breathing combined-cycle aircraft engines is internally divided into separate channels for low-speed and high-speed components of the engine, and contains one or more movable panels that are fully contained within the duct and pivotal between an open position in which incoming air is directed to both channels and a closed position in which all incoming air is directed to the channel leading to the high-speed engine. This integrated duct utilizes all incoming air at all stages of flight with no change in either the geometry of the air capture portion of the engine or the engine itself, and no exposure of movable leading edges. The result is a minimum of shock waves and a high degree of efficiency in operation of the engine.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: May 15, 2007
    Assignee: Aerojet-General Corporation
    Inventors: Melvin J. Bulman, Frederick S. Billig
  • Translating cowl inlet with retractable propellant injection struts
    Patent number: 5214914
    Abstract: The invention is an inlet system for a variable geometry transatmospheric air breathing engine. It incorporates a rotatably translatable cowl provided with a rotating lip used in combination with insertable and propellant injection struts.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: June 1, 1993
    Assignee: The Johns Hopkins University
    Inventors: Frederick S. Billig, David M. VanWie
  • Propellant utilization system
    Patent number: 5135184
    Abstract: The invention is a propellant utilization system for flight vehicles operating in both the subsonic and supersonic speed ranges. In particular, the invention uses steam and water produced in the system to replace hydrogen as a coolant and for power generation. It also provides for the utilization or oxygen obtained from air captured by the air inlet instead of oxygen stored in the vehicle.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: August 4, 1992
    Assignee: The Johns Hopkins University
    Inventor: Frederick S. Billig
  • Supersonic ramjet missile
    Patent number: 4291533
    Abstract: 1.
    Type: Grant
    Filed: December 30, 1965
    Date of Patent: September 29, 1981
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Gordon L. Dugger, Frederick S. Billig
  • Integrated air inlet system for multi-propulsion aircraft engines
    Patent number: RE43731
    Abstract: An air inlet duct for an air-breathing combined-cycle aircraft engines is internally divided into separate channels for low-speed and high-speed components of the engine, and contains one or more movable panels that are fully contained within the duct and pivotal between an open position in which incoming air is directed to both channels and a closed position in which all incoming air is directed to the channel leading to the high-speed engine. This integrated duct utilizes all incoming air at all stages of flight with no change in either the geometry of the air capture portion of the engine or the engine itself, and no exposure of movable leading edges. The result is a minimum of shock waves and a high degree of efficiency in operation of the engine.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: October 16, 2012
    Assignee: Aerojet-General
    Inventors: Melvin J. Bulman, Frederick S. Billig, Linda A. Baumler, legal representative