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| Number | Title | Issue Date |
| 7981282 | Automatic slurry strainer An automatic strainer assembly for straining a slurry comprises an inlet for receiving the slurry, a horizontally disposed strainer body in fluid communication with the inlet, and a rotatable strainer member received within the body having an inner surface and an ou... | 07/19/2011 |
| 7293658 | Drum filter assembly A drum filter assembly comprising a hollow drum filter having a longitudinal axis and an outer filter screen or mesh material, the drum filter being supported on external rollers for rotation about its longitudinal axis and an inlet for introducing liquid to be filt... | 11/13/2007 |
| 7150826 | Filtering apparatus A liquid filtering apparatus for mounting in a housing and positioned to filter liquid flowing from an inlet (23) to a drain. A rotatable wheel is disposed within and coupled to a rotating screen so that rotation of the wheel causes rotation of the screen. Th... | 12/19/2006 |
| 7125486 | Device for removing small solids from water in canal There is disclosed a device for removing small solids from water. The device includes an axle and a plurality of rotational filtering units installed on the axle. While rushed and hence rotated by water and small solids, the rotational filtering units filter the sma... | 10/24/2006 |
| 7083733 | Water treatment system and method A water treatment system provides treated or softened water to a point of use by removing a portion of any hardness-causing species contained in water from a point of entry coming from a water source, such as municipal water, well water, brackish water and water con... | 08/01/2006 |
| 6936164 | Rotary drum rainhead A device for separating debris and other material from rainwater as it flows into a downpipe from a roof gutter is disclosed. The device has a compartment for fitting to the upper end of a downpipe. The compartment has a horizontally pivoted perforated drum which ro... | 08/30/2005 |
| 6270684 | High performance combined sewage overflow and water intake screen A screening device useful in water and waste water treatment plants separates fluid flow into two streams. The screening device is perforated so that solids having a predetermined cross-section will be maintained within a first fluid stream, and a portion... | 08/07/2001 |
| 6089790 | Self-cleaning intake screen A self-cleaning intake screen assembly for preventing debris, fish, and other wildlife from being transferred from a waterway such as a lake or river, which includes a conical support structure, a screen and a screen sweeping assembly. The conical support... | 07/18/2000 |
| 5552044 | Apparatus for separating solid material and liquid Apparatus for separating waste liquid and solid material comprises an upwardly inclined passage containing an auger for conveying the solid waste material upwardly along the passage, with an inlet opening at a lower end of the passage for receiving a mixt... | 09/03/1996 |
| 4929350 | Rotary screw fish collector A porous, conical structure for submersion in a body of water for rotation by water action. A screw blade in the structure confines as well as propels fish toward an outlet end of the porous structure. A support structure for the porous, conical structure... | 05/29/1990 |
| 4676893 | Apparatus for the recovery of living organisms on the rotary filters of water pumping stations Apparatus for the release and recovery of living organisms collected or trapped on the rotary filters of water pumping stations. The apparatus comprises: on the inside of the filters, a system of two rows of multiple washing jets using water under low pressure... | 06/30/1987 |
| 4343698 | Water intake A water intake for example for taking cooling water for industrial installations from a river, a lake or the sea, has a sieve with a filter element and a recovery channel associated with the filter element for collecting and saving elements of the biomass... | 08/10/1982 |
| 4222520 | Irrigation machine A framework mounted on wheels to follow a ditch path carries a plurality of siphon tubes suspended at their outer end from an arm pivotable in response to a float detecting the water level in the ditch, and the inner end of the tubes contain water impelle... | 09/16/1980 |
| 4200532 | Wastewater treatment apparatus An arrangement for treating wastewater containing soluble organic matter through the proliferation of aerobic microorgnisms to purify the wastewater. In an apparatus having a wastewater tank, a water pervious drum rotatably mounted in the tank and partial... | 04/29/1980 |
| 4058897 | Amalgam retriever A device is shown for use in a dental office or the like where particles of precious metal or amalgam are to be recovered from a flushing stream. The construction utilizes a housing for enclosing a downwardly sloping trough element through which a flushin... | 11/22/1977 |
| 4017394 | Water screen A water-powered, self-cleaning rotary strainer for use in drawing water from a running stream. A perforated drum is rotatably mounted on a frame. Drum rotation is done by using moving water. A float is mounted on the frame to support the drum in a partial... | 04/12/1977 |
