Patents by Inventor James W. Andrew

James W. Andrew 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).

  • Propellant grain design
    Patent number: 4936092
    Abstract: A solid propellant rocket motor propellant grain configuration having a center bore of a varying diameter, ballistic slots, a stress/ballistic groove, and a burn inhibitor band for withstanding service motor operating environments and providing the required ballistic profile.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: June 26, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: James W. Andrew
  • Main-stage solid-propellant rocket motor design
    Patent number: H1082
    Abstract: A ballistic missile main-stage solid-propellant rocket motor; including a propellant grain configuration tailored to provide required missile ballistic performance, having a center bore, major and minor rear fin slots, and a silver eliminator bore enlargement; utilizing a forward pressure equalizing flap; and designed to accommodate severe operating conditions.
    Type: Grant
    Filed: January 3, 1991
    Date of Patent: August 4, 1992
    Inventor: James W. Andrew