Patents by Inventor Stephen J. Atkinson

Stephen J. Atkinson 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).

  • Compaction machine
    Patent number: 4580765
    Abstract: The invention relates to a machine for dropping heavy weights on the ground for carrying out processes of dynamic compaction or dynamic consolidation wherein a brake is provided on the hoist drum which can be actuated automatically after a given period of time has elapsed after the release of the hoist drum brake to drop the weight.
    Type: Grant
    Filed: February 24, 1984
    Date of Patent: April 8, 1986
    Assignee: Priestman Brothers Limited
    Inventors: Robert G. Nicholson, Stephen J. Atkinson