Feeding Patents (Class 209/497)
  • Patent number: 5785182
    Abstract: A small sluice for final separation of gold from all other materials commonly found in deposits of gravel, sand, etc. including a bottom panel (14) with a plurality of grooves (16), two substantially vertical sidewalls (15), a flared entrance end (13) and device for closing (18) the flared entrance end (13). This sluice is suitable for many uses including the cleanup of concentrates from panning and sluicing operations and for prospecting sampling.
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: July 28, 1998
    Inventor: Clarence W. Ashcraft
  • Patent number: 5443737
    Abstract: A separation device for suspensions comprises a housing (1), a filter body (3) with a wall of filter material situated in the housing, spray means (14) adapted to spray jets of a suspension to be separated directly onto one side of the wall of filter material, and means (4, 6) for displacing the filter body relative to the spray means. According to the invention the filter body forms a substantially circular cylindrical drum (3) with a vertical center axis, the circumferential wall of the drum comprises said wall of filter material. Further, said displacement means (4, 6) is adapted to turn said cylindrical drum about said vertical center axis during operation.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: August 22, 1995
    Assignee: Celleco Hedemora AB
    Inventors: Roland Fjallstrom, Rune Frykhult, Charles Atkeison
  • Patent number: 5048693
    Abstract: A method and apparatus for sorting articles with small density differences utilizing a flotation stream. A separator is provided in which a flotation stream continuously flows through a trough and is used to effect the separation of a mixture of articles having small density differences into several groups. Each density group of the mixture of articles to be separated is introduced at the head of the flotation stream at a selected depth. In one embodiment, the flotation stream may be comprised of a fluidized bed which is created by forcing a gas upwardly through a fluidization medium such as sand. In another embodiment of the invention, the flotation stream may be formed from a liquid.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: September 17, 1991
    Assignee: World Agrosearch, Ltd.
    Inventor: Arthur Zaltzman
  • Patent number: 4953709
    Abstract: An apparatus for sorting lightweight from heavy material in mixtures of solid materials containing lumpy, granular, and pulverous constituents substantially comprises an upright slim container having a lower portion into which material for sorting is introduced. Pulsating air flows are introduced from the exterior into the container, resulting in an upward flow of pulsating air which loosens the material for sorting and produces a fluidized bed. Simultaneously, the apparatus is vibrated up and down in a linear manner by vibrators to assist in loosening the material. The lightweight material floating in the air stream is conveyed to a discharge channel at the top end of the container, whereas heavy material rapidly sinks down to a tubular member into which a second pulsating air flow is introduced in order additionally to sort the heavy material in a last treatment stage inside the tubular member.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: September 4, 1990
    Assignee: Kaufmann GmbH
    Inventor: Hans Kaufmann
  • Patent number: 4795553
    Abstract: In a spiral separator of the kind used for the wet gravity separation of solids (Figs. 5 & 6) there are provided splitters (70,71,72) in vertically aligned troughs (20,21,22) which are operatively connected by a linkage (80) permitting adjustment of splitters in unison. Preferably the splitters are at corresponding locations of separate troughs and are in vertical register.
    Type: Grant
    Filed: November 17, 1982
    Date of Patent: January 3, 1989
    Assignee: Mineral Deposits Limited
    Inventor: Philip J. Giffard
  • Patent number: 4461700
    Abstract: A rotary feeder for simultaneous screening and discharging of material from the bottom part of a fluidized bed reactor. The rotary feeder is provided with a rotor having blades, between which pockets are formed. In the rotary feeder there is disposed an air inlet and an air outlet for accomplishing a flow of air through the pocket after it has moved over the inlet of the supply material.
    Type: Grant
    Filed: February 3, 1982
    Date of Patent: July 24, 1984
    Assignee: A. Ahlstrom Osakeyhtio
    Inventor: Seppo Lahtinen
  • Patent number: 4328093
    Abstract: A device for separating and recovering solid particles or granulated matel from a stream of fluid in a state of high purity and with minimal fluid remaining in the recovered solids. The device also provides a calibration or sizing of the recovered solids. More particularly, the device is suitable for recovering sand and gravel from a liquid slurry in dredging operations or the like and comprises a chamber into which the slurry is discharged in the form of two diametrically disposed impinging jets to decrease the kinetic energy of the slurry. The chamber is provided with one or a plurality of outlets disposed in communication with a corresponding number of channels each having a discharge port in the base thereof and a deflector in the discharge port, preferably disposed at an angle of about 45 degrees, for directing the concentrated lower layer of slurry in each channel through the discharge port into a deposition tank.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: May 4, 1982
    Assignee: The Institute of Technical Sciences of the Serbian Academy of Sci. & Art.
    Inventors: Nenad Zrnic, Branislav Bilen
  • Patent number: 4234415
    Abstract: Improved apparatus for separating mixed solids of different specific gravities by means of a liquid medium comprising rotatable means defining a frustro-conical separation chamber having a lighter solid outlet at one end and a heavier solid outlet at the other end; a generally fan-shaped wall normal to the axis of rotation stationarily mounted in the chamber dividing a lower portion of the chamber generally into a lighter solid zone and a heavier solid zone, the wall having a substantially arcuate lower surface complementary with, and adjacent, the surface of the chamber; means for supplying mixed solids and liquid medium to the chamber; a vertical opening in the lower arcuate surface of the wall for passage of solids through the wall; and means for removing solids accumulating in the heavier solid zone.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: November 18, 1980
    Inventor: Enrique de Tuya Casuso
  • Patent number: 4071440
    Abstract: Method of separation of a mixture of mineral grains with differentiated sific gravity, under the conditions of a restricted sedimentation, in a cylindrical device, consists therein that the mixture A of the mineral with water is radially supplied to a trough 2 formed around the upper edge of the wall 1 of the water box. The mineral circulating in the trough 2 is desludged and partially separated according to the weight of the grains, and then, under pulsating action of the water, is displaced in a ring-shaped working trough along spiral trajectories towards the conduit 17 and 19 taking out the light fraction D and towards the conduits with a flap 16 for discharge of the heavy fraction C. The pulsating motion of the water is effected by compressed air being cyclically fed to the ring-shaped air chamber 6 via the pulsation valves 14 from a ring-shaped tank 5 arranged around the water box. From the air chamber 6 additional air chambers 7 extend radially beneath the sieve deck 7.
    Type: Grant
    Filed: July 22, 1976
    Date of Patent: January 31, 1978
    Assignee: Centralny Osrodek Projektowokonstrukcyjny Maszyn Gorniczych "Komag"
    Inventors: Antoni Jedo, Waclaw Jachna, Adolf Szczesny
  • Patent number: 4060482
    Abstract: Fractions of different densities contained in an ore or other solid material are separated by directing the solid material in a liquid suspension on to a surface of an endless belt, moving in the direction of its length and inclined transversely to its direction of motion, along a first part of the length of a higher portion of the belt and subjecting said moving surface of the belt to a shaking motion so that lighter fractions are separated from the material and flow off a lower side edge of the belt into a receptacle. Washing liquid is directed on to the moving surface from another part of the length of the higher portion of the belt that is downstream of the first part so that washing liquid flows transversely across the shaking, moving surface to separate middling fractions from the material and carry them off the lower side edge of the belt into a second receptacle.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: November 29, 1977
    Assignee: Bartles (Carn Brea) Limited
    Inventor: Richard Owen Burt
  • Patent number: 4028231
    Abstract: 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.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: June 7, 1977
    Inventor: Harold D. Parham