Michael John Lorang
Engineers at 20, Bozeman, MT

5080235, Jan 14, 1992

Sep 27, 1990

7/588202

Carl W. Nichols - Sylacauga AL
Michael J. Lorang - Bozeman MT
Michael O. Wold - Bozeman MT
Jerry W. Rayfield - Sylacauga AL
Marvin F. Hansen - Alder MT
Richard D. Johnson - McAllister MT

Cyprus Mines Corporation - Englewood CO

B07C 900

209700

Apparatus for the separation of a mixture of discrete particulate solid materials of disparate composition and a system utilizing such apparatus is described in which the material to be processed is caused to slide under the influence of gravity along a straight inclined surface to achieve a substantially uniform velocity and thereafter along an arcuately formed surface where, due to the existence of different coefficients of sliding friction between the mixture fractions, disparate velocities are achieved by the respective particles whereby particles of the respective fractions are separately collected on a velocity basis. The described apparatus utilizes a slide surface of different material and/or a water spray to produce the disparate velocities between the particles of the respective mixture fractions. Deflector plates of various forms may be employed to prevent contamination of the clean product fraction due to bouncing of materials of the waste product fraction from the slide surface.

5069346, Dec 3, 1991

Mar 31, 1989

7/331175

Carl W. Nicols - Sylacauga AL
Michael J. Lorang - Bozeman MT
Michael O. Wold - Bozeman MT
Jerry W. Rayfield - Sylacauga AL

Cyprus Mines Corporation - Englewood CO

B07B 900

209700

Processes by which a mixture of two or more discrete particulate materials, each of said materials having a different sliding coefficient of friction, can be separated using methods which take advantage of velocity differences generated by the application of a force to said mixture to create movement of said mixture over a surface as a function of its sliding coefficient of friction. Various apparatus to effect such processes are also disclosed.

5107991, Apr 28, 1992

Apr 16, 1991

7/685690

Carl W. Nichols - Sylacauga AL
Michael J. Lorang - Bozeman MT
Michael O. Wold - Bozeman MT
Jerry W. Rayfield - Sylacauga AL

Cyprus Mines Corporation - Englewood CO

B07C 900

209700

Processes by which a mixture of two or more discrete particulate materials, each of said materials having a different sliding coefficient of friction, can be separated using methods which take advantage of velocity differences generated by the application of a force to said mixture to create movement of said mixture over a surface as a function of its sliding coefficient of friction. Various apparatus to effect such processes are also disclosed.