Patents by Inventor Bruce Bartels

Bruce Bartels 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).

  • Liquid propellant gun, breech pressure axial injection
    Patent number: 4172408
    Abstract: A liquid propellant gun having a chamber adapted to receive a projectile liquid propellant and having a breech area containing a fuel injection system and a valve internally thereof and a bolt which is chambered within said valve and adapted to move from a projectile load to a fire position. The movement of the bolt from projectile load to fire position is done in one movement and this is possible in that the valve is able to hold high-pressure, making unnecessary a forward jogging of the bolt before firing.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: October 30, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Steve Ayler, John Holtrop, Bruce Bartels
  • Liquid propellant gun
    Patent number: 3992976
    Abstract: An injection system for a liquid propellant gun including coaxial flow vas giving complete mixing of two propellant components by convergent streams, wherein ullage is eliminated by closely contouring the valves with the gun chamber and the flow valves are automatically controlled by action of the propellant pump.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: November 23, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Bruce Bartels, John W. Holtrop, Larry L. Liedtke, Russell T. Trovinger