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| Number | Title | Issue Date |
| 6871757 | Method and means for sand reblending A method and apparatus for reblending sand whereby multiple reblending tanks with a plurality of reblending stations have thin respective outputs joined through a single control system. ... | 03/29/2005 |
| 6796432 | Method for reblending sand A method of reblending sand in a classification tank having multiples stations and discharge valves within each station includes the steps of delivering sand to the tank; calibrating the tank to analyze the raw feed material and develop discharge rates, flow multipl... | 09/28/2004 |
| 6467631 | Air sifting apparatus An air sifting apparatus is provided for preparatory concentration of raw material including coal, and includes a material feed-in device, a material bed support device, an air jig plenum, and a discharge control device. The material bed support device re... | 10/22/2002 |
| 6351676 | Computer controlled separator device A computer controlled separator device is disclosed. The computer control system monitors the operation of the separator device and makes any adjustments necessary to maintain optimal operation. An operator may input values representing desired operating ... | 02/26/2002 |
| 6311847 | Method and means for sand reblending A method of reblending aggregate includes delivering aggregate of various sizes to the classification tank having a plurality of stations with primary and secondary discharge valves. The tank is then calibrated to determine raw feed analysis, discharge ra... | 11/06/2001 |
| 6070738 | Dynamic monitoring and control of jigs The monitoring and control of jig separators is effected by monitoring the time variation within a jig cycle of at least one operating parameter of the jig, and manipulating the operating parameter(s) to produce the sought after form of the time variation... | 06/06/2000 |
| 5943231 | Computer controlled separator device computer controlled separator device is disclosed. The computer control system monitors the operation of the separator device and makes any adjustments necessary to maintain optimal operation. An operator may input values representing desired operating pa... | 08/24/1999 |
| 5541831 | Computer controlled separator device A computer controlled separator device is disclosed. The computer control system monitors the operation of the separator device and makes any adjustments necessary to maintain optimal operation. An operator may input values representing desired operating ... | 07/30/1996 |
| 5244099 | Apparatus and method for improving density uniformity of a fluidized bed medium, and/or for improved material fluidized bed sorting An apparatus for providing a fluidized bed to effect the separation of a mixture of articles having at least a first density and a second density that is greater than the first density into separate groups. The apparatus includes an inclined trough which ... | 09/14/1993 |
| 5207742 | Control apparatus for coal/mineral jigs A nuclear jig control unit which is an electronically controlled system employing nuclear sensing devices and electro-hydraulic operators to proportionally control the opening and closing of a refuse gate of a jig. These components permit remote operator ... | 05/04/1993 |
| 5148922 | Gravity particle separator A gravity separator for the separation of heavier particles from lighter waste material comprises a stack of decks (4) mounted for resonant oscillatory motion within a supporting frame (1). A motor (9) oscillates the decks at their resonant frequency whil... | 09/22/1992 |
| 5028317 | Control of jig separators The density of the material in the jig bed is measured in consecutive short segments over the jig cycle, the time period of each segment being not greater than one-tenth the cycle time of the jig, to determine the density signature or profile of the jig. ... | 07/02/1991 |
| 5024334 | Method and means for gravity table automation A system for gravity table separation including a gravity table for separating materials and a detector operatively associated with the gravity table for detecting the movement of control particles with respect to the gravity table during its operation. T... | 06/18/1991 |
| 4741443 | Fluidized bed for continuous separation of two mixed solid phases In a fluidized bed apparatus for separation of two mixed solid phases of which one is formed by a fluidizable powdery material and the other is formed by a material which is not fluidizable under the conditions of fluidization of the former, an enclosure ... | 05/03/1988 |
| 4563271 | Percussion jig The invention relates to a percussion jig in which the carrier for material to be separated is freely suspended in the region of its centroidal axis on the piston rod of a hydraulic drive cylinder. This results in a particularly simple construction subjec... | 01/07/1986 |
| 4318806 | Automatic control apparatus for a grain separator An automatic control apparatus of a grain separator for precisely separating a mixture of soil particles and grain having different hue and specific gravity, wherein the grain separator includes a soil discharge opening disposed at the front end of a sepa... | 03/09/1982 |
| 4316799 | Automatic control apparatus for an oscillating grain separator An oscillating grain separator comprised a grain separating plate provided with a rugged surface which oscillates in the angle direction of elevation for shaking up grain and mixed grain is separated at one at front side and/or rear side of the separating... | 02/23/1982 |
| 4265744 | Discharge-controlled method for a compressed air-controlled wet settling machine A discharge-controlled method for a compressed air-controlled wet settling machine for the preparation of mineral mixtures, particularly for the washing of raw coal, is carried out such that the preparation takes place by means of pulsation of a separatin... | 05/05/1981 |
| 4248702 | Stratifier discharge control A wash box for separating materials produced in, for example a mining operation, into fractions of different densities. The machine is divided vertically into compartments, including at least one stratification compartment and at least one reject compartm... | 02/03/1981 |
| 4130223 | Feed level monitor and control apparatus A hopper device for delivering granular or powdery material to a conveyor system of a type having a circuitous tube and a continuous flexible member having disc members rigidly attached thereto has a material level monitor and control apparatus attached t... | 12/19/1978 |
| 4028231 | Vacuum type coal separator A device for circulating liquid by vacuum, that is carrying two or more particles of different densities. The particles are separated and then discharged through a discharge bowl to separate receptacles, and the liquid is returned for re-use.... | 06/07/1977 |
| 3981799 | Baum jig A Baum Jig for gravitational enrichment of minerals, particularly hard co in which a screen deck is transversely located to the axis of the jig. Air chambers are made of plates as cut-outs of a cylindrical surface. The axes of symmetry are deflected from... | 09/21/1976 |
| 3957655 | Sphincter cone assembly for purifying water A sphincter cone for water treatment and clarification, which cone involves no moving parts. At the top of the cone there is provided a surge tank with an open bottom surrounded by an annular well extending along the perimeter of a cylindrical extension o... | 05/18/1976 |
