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| Number | Title | Issue Date |
| 6338595 | Storm water control header for culverts A storm-water control header for a culvert has a vertical head-wall with a thimble on the downstream side, and an adjustable inlet control device including a weir on the upstream side. The thimble is positioned within the culvert, and passes water from th... | 01/15/2002 |
| 6309139 | Manhole with extension wings A manhole for a storm sewage system comprising a structure having at least two outwardly extending substantially vertical flat panels projecting outwardly from the exterior surface a predetermined distance on opposite sides of the base portion of the manh... | 10/30/2001 |
| 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 |
| 6082925 | Storm sewer overflow control device A storm sewer overflow control device for controlling runoff surge flows from a generally vertically oriented storm drain into a generally horizontally oriented storm sewer pipe includes an engagement portion configured for insertion into the storm sewer ... | 07/04/2000 |
| 6012871 | Septic tank system and distribution device suitable for use in sloping terrain A distribution device is suitable for apportioning effluent discharged by a settling tank among first and second outlets. A receptacle includes an interior chamber, an inlet, and first and second outlets. A dam partially blocks the second outlet. Effluent... | 01/11/2000 |
| 5871304 | Precast prerotation basin system A precast prerotation basin system for use in a wet well for removing water or fluid therefrom is disclosed which comprises a prefabricated, three-dimensional body having a prerotation basin and fluid entrance channel. The precast prerotation basin presen... | 02/16/1999 |
| 5588777 | Wastewater treatment system A wastewater treatment system provides a leaching field that may be of conventional configuration or may include certain unique features, the present invention relating to a subterranean horizontally oriented in-drain below the conventional leaching field... | 12/31/1996 |
| 5553970 | Water-saving irrigation device A water-saving irrigation device of the type that is utilized for the irrigation of vegetation and trees in arid desert areas is provided. The irrigation device includes a water inlet port, a water outlet port and a water storage container. The water inle... | 09/10/1996 |
| 5360556 | Method of feeding wastewater effluent to filter bed through parallel conduits An on-site wastewater treatment system distributes septic tank effluent over a particulate media filter bed through a distribution manifold at a sufficient volumetric flow rate relative to the cross-sectional area of the distribution conduits to inhibit u... | 11/01/1994 |
| 5228802 | Underground drainage facility and operation method therefor A drainage system comprises a drainage passage for a drain water, a pump for pumping up the drain water from the drainage passage to a drain portion which is arranged above the drainage passage, and a storage tank which has an inlet connected to the drain... | 07/20/1993 |
| 5116164 | Device to load reinforcement rods Device (27) to load reinforcement rods, which is suitable to cooperate with an excavation equipment (14) in providing lengthwise reinforcements in tunnels, particularly in excavations of a great depth amounting to about twenty meters or more, the excavati... | 05/26/1992 |
| 4838731 | Septic tank distribution box system A system for leaching septic effluent is disclosed which includes a concrete distribution box having inlet and outlet openings formed therein located at different levels. An open-topped tray pivotally mounted in the distribution box at a level located bet... | 06/13/1989 |
| 4765541 | Drip emitter housing A housing for use with a drip irrigation emitter whereby the emitter can be disposed in the housing underground. The housing comprises a tubular body open at one end which is selectively closable by a cover, the other end of the interior defined by the tu... | 08/23/1988 |
| 4756827 | Liquid flow drainage control Improvements are disclosed for liquid flow drainage control in gravity type systems such as sewage septic tank systems. A plastic cap which is insertable into the ends of the drainage pipes that project into a distribution box is formed with an end face a... | 07/12/1988 |
| 4721408 | Water distribution system An improved water distribution system characterized by a construction including an irrifluent pipe disposed below the soil surface for dispersing water or treated waste water at a controlled rate. The irrifluent pipe includes an inner fluid conduit having... | 01/26/1988 |
| 4685828 | Irrigation channel gate An irrigation ditch gate, comprising port means for defining a passage for conduction of water, configured for mounting in a wall of an irrigation ditch and attached to a frame. A plate means comprising a generally circular plate is pivotally mounted on t... | 08/11/1987 |
| 4550878 | Drip irrigator with pressure responsive flow regulator A fluid flow control device particularly useful as a drip irrigation emitter comprises a body member formed with at least two grooves in spaced parallel relationship separated by a separator wall, one of which grooves leads to the inlet and the other to t... | 11/05/1985 |
| 4522533 | Flow restrictor The present invention relates to a flow restrictor for insertion into the inlet of a pipe to restrict fluid flow within said pipe to a predetermined maximum. The flow restrictor is comprised of a tapered tubular hollow body portion having a smaller diamet... | 06/11/1985 |
| 4156396 | Root irrigation dripilator device with spray head This device consists primarily of a main body with perforated sleeve means, for insertion into a ground surface, for the purpose of introducing a controlled amount of water and liquid fertilizer to plant roots underground. It includes a manually controlle... | 05/29/1979 |
| 4103495 | Flow control device for an irrigation ditch A device for controlling the flow of water between an irrigation ditch and an adjacent field. A conduit having a first end opening into the irrigation ditch and a second end opening into the field to be irrigated. The cover is pivotally attached to the fi... | 08/01/1978 |
| 3951163 | Automatic anti-siphon valve Each valve of the present invention is comprised of a hollow valve body, an inlet connectable to a source of pressurized water, a first outlet disposed at the top of the valve body for emptying into an irrigation basin, a second outlet for connection to t... | 04/20/1976 |
