Patents by Inventor John M. Lupton

John M. Lupton 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).

  • Dry separation of solids
    Patent number: 4857177
    Abstract: Mixed scrap metal pieces 6 are sorted in a fluidised hindered settler containing sand, through which the pieces settle at a differential rate. The sand is fluidised by air from 20 and vibration-driven around a circular trough 2. A depthwise partition 14a sorts the pieces according to settling rate, whereafter they are removed up separate ramps 14 and 16. The sand is levelled preparatory to receiving the pieces 6, and only afterwards is it fluidised.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: August 15, 1989
    Assignee: National Research Development Corporation
    Inventor: John M. Lupton