Patents by Inventor Robert LeBrun

Robert LeBrun 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: 5322576
    Abstract: A method of increasing the viscosity, and the resistance to high shear induced crystallization, of a pumpable, shear thickened emulsion explosive, is provided wherein the explosive has been prepared by emulsifying an oxidizer salt phase into a fuel phase, and at least a portion of said fuel phase has been replaced with a vegetable oil. The explosives are particularly suitable for use in up-hole blasting operations because of their high viscosity and resistance to shear induced crystallization of the oxidizer salt.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: June 21, 1994
    Assignee: ICI Canada Inc.
    Inventors: Clare T. Aitken, Melvin A. McNicol, Robert Lebrun
  • Patent number: 4007932
    Abstract: A miniature hockey game comprising a substantially horizontal playing surface which moves in an orbital movement in the plane of the surface. Miniature playing members are unattachedly mounted on the playing surface to move over such surface as it is subjected to the orbital movement. Each member has a steering wheel normally in contact with the playing surface to direct its movement and it has a retractable friction disc normally out of contact with the playing surface. The friction disc is mounted on an elbowed shaft so that when it is applied against the surface, the playing member is stopped in its movement and starts to spin. The steering wheel and friction disc are interconnected so that when one touches the playing surface, the other is free from it. Control members are provided beneath the playing surface to cause application of the friction disc against the playing surface through magnetic action.
    Type: Grant
    Filed: February 26, 1976
    Date of Patent: February 15, 1977
    Inventor: Robert LeBrun