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| Number | Title | Issue Date |
| 5617955 | Dynamic-mining system comprising hydrated multiple recovery sites and related methods A mining system and method for recovering gold and/or other heavy metals at multiple sites along a continuously hydrated ore processing route. The gold-bearing ore and primary or carrier water are dynamically and circuitously displaced to segregate the go... | 04/08/1997 |
| 5563803 | Fluidized-bed equipment and pressurized fluidized-bed (combustion) combined cycle apparatus A bed height of a fluidized bed is detected which influences reaction of a fluidized-bed equipment. In the fluidized-bed equipment in which a fluidized particle is put into the vessel, physical properties at a plurality of points within the vessel are mea... | 10/08/1996 |
| 5544756 | Dynamic mining system comprsing hydrated multiple recovery sites and related methods A mining system and related methods for recovering gold and/or other heavy metals at multiple sites along a continuously hydrated ore processing route. The gold-bearing ore and primary or carrier water are dynamically and circuitously displaced to segrega... | 08/13/1996 |
| 5520289 | Device for separating insulation and metallic material A device for separating lighter insulation material from heavier metallic material present in decomposed electric cables or the like, which device comprises an inlet (8) for mixed insulation and metallic material, and a first outlet for the insulation mat... | 05/28/1996 |
| 5301810 | Method and apparatus for removing plastic from wood chips Apparatus and process for removing unwanted foreign material from particulate material. The apparatus and process find particular application in the pulp and paper industry to remove contaminating plastic material from wood chips. The apparatus includes a... | 04/12/1994 |
| 4997551 | Concentration for beneficiating minerals A concentrator comprises a beneficiating member (1) in the form of a bowl with a tapered bottom (2) a concavity of which is provided with a discharge hole (13), and a drive mechanism (5) a hollow drive shaft (8) of which accommodates eccentrically a shaft... | 03/05/1991 |
| 4962858 | Cleaning sluice boxes 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 boxe... | 10/16/1990 |
| 4894148 | Device for separating a heterogeneous mass of solid material into fractions A device for separating a heterogeneous mass of solid material into fractions. The constituents of a heterogeneous mass of solid material are comminuted and dried and then separated into fractions. The mass is received in a trough-shaped and subjected to ... | 01/16/1990 |
| 4731270 | Laminated trough for a spiral concentrator and process for construction of same A laminated trough for a spiraled mineral concentrator; the trough composed of two or more laminates, chemically bonded, and the process for constructing the same. The trough includes a top laminate of highly abrasion-resistant soft elastomer, the elastom... | 03/15/1988 |
| 4676891 | Portable sluice Portable sluice equipment is provided for miners backpacking into back country to separate out valuable metals from placer deposits. All major components are made from commercially available PVC plastic conduits and fittings. The principal component is a ... | 06/30/1987 |
| 4664789 | Classifying device An hydraulic spiral separator (10), for separating minerals, having at least one substantially helical trough (11) of a cross sectional shape comprising a base portion, an upwardly directed wall portion radially outwardly of the base portion and an upward... | 05/12/1987 |
| 4614271 | Separating element for vibratory grain separator A rectangularly shaped separating element for a vibratory grain separator is made from a single metal plate, and has upright front and rear walls, and side walls, one of which side walls has therein a notch serving as hulled rice outlet, and the other of ... | 09/30/1986 |
| 4583645 | Vibratory grain separating apparatus used with rice-hulling apparatus The apparatus includes a rectangular separating plate having upright front and rear walls and unhulled and hulled rice outlets formed on opposite sides thereof, respectively. The plate is adjustably supported in a plane inclined to the horizontal and is r... | 04/22/1986 |
| 4375491 | Roll-up fold-up sluice apparatus A roll-up fold-up sluice apparatus for use in separating sediment by water flow. The apparatus includes an elongate flexible mat having formed, in a central portion therein, a plurality of longitudinally spaced riffles which extend laterally with respect ... | 03/01/1983 |
| 4267037 | Apparatus for separating waste material contained in a heap An apparatus and method for separating waste material contained in a heap in at least one separating zone, the heap largely comprising particles of the same shape, size and density, from which the waste particles differ. It also relates to apparatus for p... | 05/12/1981 |
| 4251357 | Sluice construction A continuous run sluice box having vibrating and sonic vibration means for concentrating gold or other precious metal, while eliminating the loss of black sands normally accompanying the use of conventional sluices. The sluice box is provided with a sonic... | 02/17/1981 |
| 4237001 | Ore classifier An ore classifier adaptable for separating coal from inter-mixed heavy material and which performs a washing operation for the coal. The classifier has an elongated inclined trough, the floor of which is provided with transverse corrugations constructed t... | 12/02/1980 |
| 4206046 | Process and apparatus for separating particles by relative density A process and apparatus wherein a size-classified bed of particles is fluidized by agitating a supporting surface with a gyratory motion to fluidize the particle bed. Particles are contacted with surfaces, e.g, vertically projecting surfaces, movable with... | 06/03/1980 |
| 3970551 | Gold separator A gold sluice includes an elongated semicylindrical trough having angular corrugations therein for imparting a longitudinal turbulent flow to water moving gravitationally therethrough. The longitudinal spiral turbulence of the water promotes separation of... | 07/20/1976 |
| 3950246 | Dredge units A dredge unit having a buoyant support carrying a sluice box suspended beneath, a water suction system connected to an outlet end on the box and a suction hose operatively connected to an inlet end thereof. The water suction system operates to draw water ... | 04/13/1976 |
| 3941690 | Portable sluice pan A portable sluice pan is described for panning for gold and other valuable heavy minerals from placer deposits. The pan includes an elongated trough having a feed hopper at one end and a removable flexible riffle mat in the bottom of the trough to cause t... | 03/02/1976 |
