Patents by Inventor Francois J. Callut

Francois J. Callut 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).

  • Method and apparatus for separating and recovering particulate material
    Patent number: 4908139
    Abstract: Particulate material such as coal of a size inferior to 1 mm is recovered by being entrained in a liquid medium and being fed through an apparatus comprising a plurality of cyclone separators connected in series, the cyclone angle of the separators decreasing in the direction of flow. The cyclone angle .alpha..sub.2 of a cyclone separator in the series is within .+-.5% of the angle calculated according to the formula ##EQU1## where .alpha..sub.2 is the cyclone angle of a cyclone separator following a separator with angle .alpha..sub.1 and .phi..sub.1 and .phi..sub.2 represent the geometric mean particle size of the cut of successive separators with these angles.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: March 13, 1990
    Assignee: Ryan Investments, B.V.
    Inventor: Francois J. Callut
  • Method and apparatus for separating and recovering particulate material
    Patent number: 4865740
    Abstract: Particulate material such as coal of a size inferior to 1 mm is recovered by being entrained in a liquid medium and being fed through an apparatus comprising a plurality of cyclone separators connected in series, the cyclone angle of the separators decreasing in the direction of flow. The cyclone angle .alpha..sub.2 of a cyclone separator in the series is within .+-.5% of the angle calculated according to the formula ##EQU1## wherein .alpha..sub.2 is the cyclone angle of a cyclone separator following a separator with angle .alpha..sub.1 and .phi..sub.1 and .phi..sub.2 represent the geometric means particle size of the cut of successive separators with these angles.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: September 12, 1989
    Assignee: Ryan Investments, B.V.
    Inventor: Francois J. Callut