Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7344033 | Solid-liquid separator To provide a solid-liquid separator in which a treatment object such as sludge can be transported without clogging, liquid can be efficiently separated from the treatment object, and a maintenance operation can be easily conducted. Movable plates 12 and fixed... | 03/18/2008 |
| 7267049 | Screw press for pressing fibrous material, in particular sugar beet pulp A screw press (1) for pressing fibrous material, in particular sugar beet pulp, comprising: at least one pair of helical elements (30) which are disposed mutually parallel and side by side and comprise at least one helix (32, 33) disposed about ... | 09/11/2007 |
| 7191700 | Solid-liquid separator A system is provided with a solid-liquid separator which can transport sludge and other material for treatment without clogging and can efficiently separator liquid from such material for treatment. The system includes movable plates and fixed plates alternatingly d... | 03/20/2007 |
| 6792850 | Screw press The invention relates to a screw press for separating liquids from solid-liquid mixtures, especially pulp suspensions, which has a casing provided with liquid passages, especially divided into segments, a screw rotating inside the casing, a shaft, preferably hollow,... | 09/21/2004 |
| 6451213 | Methods and apparatus for de-watering sludge An apparatus for de-watering sludge. A main shaft is rotated about a longitudinal axis at a first rate. A screw shaft coupled to the main shaft is rotated about the longitudinal axis at the first rate. Screw flighting coupled to the screw shaft is rotated... | 09/17/2002 |
| 6241902 | Methods and apparatus for de-watering sludge An apparatus for de-watering sludge. A main shaft is rotated about a longitudinal axis at a first rate. A screw shaft coupled to the main shaft is rotated about the longitudinal axis at the first rate. Screw flighting coupled to the screw shaft is rotated... | 06/05/2001 |
| 5865113 | Material densifying and separating device The invention provides a novel device for separating a composite raw material under pressure into constituent flowable and residual materials. The device comprises: a laminated block having a longitudinal axis, the block comprising a plurality of transver... | 02/02/1999 |
| 5756098 | Methods for the extraction of phytochemicals from fibrous plants in the absence of solvent Methods and apparatus are provided for the recovery of organic compounds from fibrous plant materials. Organic compounds which can be recovered from the fibrous plant materials include plant metabolites, such as arabinogalactan and phenols, which can be i... | 05/26/1998 |
| 5333556 | Double press screw A double-screw press for separating a liquid from a two-phase solid-liquid material includes a hollow barrel and two screws disposed in the barrel. The barrel comprises a plurality of detachable barrel plates and a plurality of spacers disposed between th... | 08/02/1994 |
| 4448537 | Screw-type hydro-extracting extruder A screw-type hydro-extracting extruder comprising a raw material supply zone, a hydro-extracting zone and a heat-melting zone, said hydro-extracting zone is comprised of a plurality of doughnut-shaped plates and a slit is formed between every two adjacent... | 05/15/1984 |
| 4446788 | Universal screw press built in modular system A screw press built in a modular system is disclosed. Included are a driving gear, wormshaft, and a housing provided with an impact cone and a perforated wall. The size of the perforations is variable during operation.... | 05/08/1984 |
| 4228732 | Device for the extraction of juices and essential oils from whole fruits, in particular from citrus fruits Device for the extraction of juices and essential oils from whole fruits, in particular from citrus fruits, wherein it comprises, in combination, a series of cylindrical elements, having a vertical axis, telescopically set with a slight radial clearance, ... | 10/21/1980 |
| 4041854 | Sludge dewatering A filter-dewatering-expression apparatus. Rotating helical blades of a screw conveyor compress and squeeze liquid from the sludge within structure which permits the liquid to escape therefrom, and discharge the dewatered solids out the end. The filter-dew... | 08/16/1977 |
| 4002559 | Screw conveyor with dewatering means A screw conveyor for moving water-laden materials from one location to another comprising a feeder screw extending longitudinally within an enclosing duct or housing and a dewatering cylinder closely encircling the screw and comprised of closely spaced el... | 01/11/1977 |
