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| Number | Title | Issue Date |
| 6378704 | Water separation system, method and apparatus for construction debris A system for separating construction debris into low density debris and high density debris. The construction debris is delivered into a rotating drum having front and rear discharge openings. The lower portion of the drum is filled with water, and the de... | 04/30/2002 |
| 4944869 | Method and installation for obtaining enriched fractions from used storage batteries An apparatus for obtaining enriched fractions from storage batteries is preferably three units connected in series, each of which has two concentrically disposed drums provided with helical strips on their inner wall. Concentrically to the axis of the out... | 07/31/1990 |
| 4561973 | Ore concentrator pad assembly A method of effecting practical, simple and economical production of ore-concentrating pads of numerous configurations and sizes. Nails are employed to secure extruded strips to a backing sheet and an underlying support, following which the strips are piv... | 12/31/1985 |
| 4476014 | Method of making an ore concentrator, and concentrator thus made A method of effecting practical, simple and economical production of ore-concentrating pads of numerous configurations and sizes. Nails are employed to secure extruded strips to a backing sheet and an underlying support, following which the strips are piv... | 10/09/1984 |
| 4207176 | Reclamation of unset concrete aggregates Apparatus for reclaiming aggregate from unset concrete comprising an inclined rotating drum, a reservoir space in the drum, and means for separating the slurry in the reservoir from aggregate in the reservoir, the slurry exiting from the lower end of the ... | 06/10/1980 |
| 4202759 | Centrifugal screening apparatus A centrifugal screening apparatus for scalping or sizing bulk materials in which an auger assembly conveys the bulk materials from an intake chamber into a cylindrical screening sleeve mounted within an enclosed screening chamber and subjects the bulk mat... | 05/13/1980 |
| 4151074 | Wet-type sand classifier A rotary drum-type sand classifier of this invention is provided with a desired number of rows of sand discharging mechanisms at the rear end thereof. Between each pair of sand discharging mechanism, a water cleaning chamber is formed where the classified... | 04/24/1979 |
| 4070202 | Method and apparatus for separating solid materials A rotary drum air separation system separates mixed solid materials into a light fraction and a heavy fraction with substantially no stagnation of material in the air drum. It further provides for processing high volume urban solid waste without first siz... | 01/24/1978 |
| 4033458 | Method and apparatus for cleaning shredded scrap Shredded scrap is conveyed from a heat generating automobile shredder to one end of a horizontal tumbling drum and is caused to move in one direction through the drum as it tumbles. An air stream which has aspirated heat generated by the shredder, and car... | 07/05/1977 |
