Patents by Inventor Lennox P. H. Greenhalgh

Lennox P. H. Greenhalgh 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).

  • Apparatus for separating particulate material from a liquid medium
    Patent number: 5385668
    Abstract: The invention relates to an apparatus in the form of a multi-cell installation, and a method for the recovery of metal values from a liquid medium 16 in the form of a pulp or leach solution in which a continuous supply of a liquid medium 16 is continuously brought into reactive contact with a high concentration of a particulate material 17, and in which the particulate material is continuously separated from the liquid medium. The installation comprises a plurality of vessels 10, 12 for the liquid medium independently driven agitation means 34 for maintaining particulate material 17 in suspension; a screen 22 arranged at an angle to the horizontal and located above the liquid level; and an axial flow impeller 26 for causing an upward flow of the liquid medium 16 to the screen 22.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: January 31, 1995
    Assignee: Bateman Project Holdings Limited
    Inventors: Lennox P. H. Greenhalgh, Robert P. Riley