Patents Assigned to John C. Newman
  • Cleaning sluice boxes
    Patent number: 4962858
    Abstract: What is disclosed is method and apparatus for alleviating the problem with cleaning of sluice boxes. The invention is characterized by continuous cleaning of an endless belt onto which the heavy metal concentrate is projected by a conventional sluice boxes, shaker screens and the like, and eliminating the down time of the apparatus for cleaning, as in the prior art. This down time is approximately fifty percent of the time.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: October 16, 1990
    Assignee: John C. Newman
    Inventors: John C. Newman, Lloyd A. Molby