Patents by Inventor Allan J. McDonald

Allan J. McDonald 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).

  • Patent number: 4840024
    Abstract: An integrated stage rocket motor arrangement provides boost and repeated throttling post boost operations, on demand, and includes an attitude control system. The rocket motor includes a plurality of casings for enclosing an initial boost motor, a post boost motor, and gas generator means for producing gases that are used for re-ignition of the post boost motor and as a motive source for the attitude control system. The boost motor and post boost motor are contained within the same enclosure but are separated by an internal bulkhead. The rocket motor has a plurality of nozzles one of which is located aft of the boost motor and another located within the internal bulkhead that separates the boost and post boost motors.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: June 20, 1989
    Assignee: Morton Thiokol, Inc.
    Inventor: Allan J. McDonald
  • Patent number: 4547235
    Abstract: In accordance with the present invention there are provided gas generating compositions comprising sodium azide, silicon dioxide, potassium nitrate, molybdenum disulfide and sulfur.
    Type: Grant
    Filed: June 14, 1984
    Date of Patent: October 15, 1985
    Assignee: Morton Thiokol, Inc.
    Inventors: Fred E. Schneiter, Allan J. McDonald
  • Patent number: 4023355
    Abstract: A heavily insulated, hydraulically actuated, compound poppet valve is positioned in a main gas stream between a gas generator and a rocket motor so that the gases must flow around it and be diffused thereby. It is also capable of selectively valving a variety of ports from the gas generator into the rocket motor to achieve desired ignition effects; and it can turn off flow completely between the two motors and prevent excessive heat from the rocket motor from entering the gas generator.
    Type: Grant
    Filed: February 24, 1972
    Date of Patent: May 17, 1977
    Assignee: Thiokol Corporation
    Inventor: Allan J. McDonald