Patents by Inventor Frederick Dodd

Frederick Dodd 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).

  • Ground hydraulic system hypergolic slug injection
    Patent number: 10975805
    Abstract: An engine start system includes a facility that has a ground based hydraulic pressurization system and a combustor of a liquid propellant rocket engine. The engine is fluidly coupled to the ground based hydraulic pressurization system. The liquid propellant rocket engine is operably detachable from the ground based hydraulic pressurization system.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: April 13, 2021
    Assignee: AEROJET ROCKETDYNE, INC.
    Inventors: Douglas Parker, Frederick Dodd
  • GROUND HYDRAULIC SYSTEM HYPERGOLIC SLUG INJECTION
    Publication number: 20190323454
    Abstract: An engine start system includes a facility that has a ground based hydraulic pressurization system and a combustor of a liquid propellant rocket engine. The engine is fluidly coupled to the ground based hydraulic pressurization system. The liquid propellant rocket engine is operably detachable from the ground based hydraulic pressurization system.
    Type: Application
    Filed: July 11, 2017
    Publication date: October 24, 2019
    Inventors: Douglas Parker, Frederick Dodd
  • Low velocity injector manifold for hypergolic rocket engine
    Patent number: 9404441
    Abstract: A fuel manifold for a thrust chamber assembly includes a main fuel chamber which is generally frustro-conical in shape. The main fuel chamber provides a resonance frequency that is different than an acoustic resonance frequency of a combustion chamber.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: August 2, 2016
    Assignee: AEROJET ROCKETDYNE OF DE, INC.
    Inventors: William S. Brown, Thomas M. Walczuk, Rodney Noble, Frederick Dodd
  • LOW VELOCITY INJECTOR MANIFOLD FOR HYPERGOLIC ROCKET ENGINE
    Publication number: 20100037590
    Abstract: A fuel manifold for a thrust chamber assembly includes a main fuel chamber which is generally frustro-conical in shape. The main fuel chamber provides a resonance frequency that is at least an order of magnitude lower than an acoustic resonance frequency of a combustion chamber.
    Type: Application
    Filed: August 18, 2008
    Publication date: February 18, 2010
    Inventors: William S. Brown, Thomas M. Walczuk, Rodney Noble, Frederick Dodd
  • Hydraulic valves and hydraulic systems
    Patent number: 4062374
    Abstract: A combined compensator and off-loading valve comprising a system pressure gallery connected to a tank or low pressure gallery by a plunger valve, the plunger having a greater area than the valve seating, this differential area being exposed in operation to system pressure, the plunger being hollow and being closed at the end opposite the valve setting by a sliding sleeve bearing against a fixed abutment and having a cross-sectional area equal to the plunger differential area, and a pin bearing against a caged compensator spring, the plunger being urged against the valve seating by a light spring, and means being provided for admitting load pressure to the interior of the plunger. The valve plunger may incorporate a pilot relief valve so that the valve opens when the pressure becomes excessive.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: December 13, 1977
    Assignee: Sperry Rand Limited
    Inventors: John Stephen Marshall, John Frederick Dodd