| Patents for E03F 5 - Sewerage structures (11,230) |
|---|
| 06/06/1991 | DE4031479A1 Rain-water settling tank - has floating wall to retain material floating on water surface |
| 06/05/1991 | EP0429593A1 Device for separating light liquids. |
| 06/04/1991 | CA1284611C Vortex valves |
| 05/29/1991 | EP0428654A1 Vacuum collecting vessel for flushing water |
| 05/23/1991 | DE4036422A1 Tank for waste water utilisation system - has foam suppressing agent to collector tank with strainer and filtering substance |
| 05/23/1991 | DE4033112A1 Oil and gasoline separator providing mobile sepn. system - in which vessel contg. three chambers uses floating skimmer to remove oil from the surface of contaminated water |
| 05/23/1991 | DE3938381A1 Flushing mechanism with pipe and coupler - has water supply pipe ending above reverse flow level and aligned with down pipe |
| 05/23/1991 | DE3937685A1 Backflow weir sewer system main duct - has hinged flap held in incoming or on-going line above water at normal level by floating counterweight |
| 05/21/1991 | US5017039 Covering for a ground opening |
| 05/16/1991 | DE3937931A1 Liq. flow rate regulator - comprises chamber whose inlet valve is controlled by a float regulates the flow of liq. into sewage works, ponds etc. |
| 05/08/1991 | EP0425530A1 Closure device for drainpipes. |
| 05/02/1991 | DE3936002A1 Device for flushing rainwater storage tank - has inner vessel which can be tipped about horizontal axis |
| 04/25/1991 | DE4022587A1 Light-liq. separator contg. partitions - in which shape and arrangement of openings in partitions optimise performance of gravitational liq. separator |
| 04/24/1991 | EP0423212A1 Water backup preventing system and monitoring system therefor |
| 04/10/1991 | CN1050583A Anti-flooding sewage grinder pump liqucd level control system in separately mounted canister |
| 04/09/1991 | US5005603 Retrofittable sewer trap |
| 04/04/1991 | DE3931562A1 Outlet control for water storage tank - has measuring device with upwards inclined jet baffle and downstream float for low velocity streams |
| 04/03/1991 | EP0420778A1 Apparatus for capping a manhole |
| 04/03/1991 | EP0419607A1 Drainage device for a flagged floor. |
| 04/02/1991 | US5004534 Catch basin |
| 03/26/1991 | WO1991004099A1 Anti-flooding sewage grinder pump liquid level control system in separately mounted canister |
| 03/26/1991 | CA2042050A1 Anti-flooding sewage grinder pump liquid level control system in separately mounted canister |
| 03/19/1991 | US5000621 Apparatus for forming a trench |
| 03/19/1991 | US5000217 Apparatus for keeping a rain water well unfrozen |
| 03/12/1991 | US4999117 Monitoring method for wastewater pump station and compatible apparatus |
| 03/06/1991 | EP0415359A2 Vacuum-type sewage collecting system and vacuum valve controller for the same |
| 03/05/1991 | US4997312 Water backup preventing system and monitoring system therefor |
| 03/01/1991 | CA2024026A1 Vacuum-type sewage collecting system and vacuum valve controller for the same |
| 02/27/1991 | EP0413940A2 Device for continuous and automatic draining sludge, especially sewage sludge |
| 02/27/1991 | CN2072109U Drain grating discharge orifice precast unit |
| 02/27/1991 | CN1049540A Buoyancy starting siphonage device |
| 02/27/1991 | CN1011804B Device of suctorial transfer system used for liquid |
| 02/21/1991 | DE4024191A1 Concrete oil-water sepn. container with end bulges - holding integral inlet and outlet bores respectively for raw and treated water |
| 02/19/1991 | US4993722 Apparatus and method for improved pipe to manhole sealing |
| 02/14/1991 | DE4001922C1 Separator or sludge catcher with no limiting sealing ring - comprises concrete sections which are sealed at contact points using perforated injection tube to apply seal |
| 02/06/1991 | EP0411939A1 Liquid waste separator |
| 02/06/1991 | EP0411293A2 Gulley |
| 02/05/1991 | CA1279863C Hoist for a manhole |
| 01/31/1991 | DE3930226A1 Internal bleed in multichamber heavy liq separator |
| 01/29/1991 | US4988234 For inlet grating of a fluid drainage system |
| 01/29/1991 | US4987913 Apparatus and method for controlling operation of storm sewage pump |
| 01/24/1991 | DE3923820A1 Rain-water tank stirring system - uses circulating pumps which direct jets of water over floor |
| 01/22/1991 | US4986693 Roadway water drainage installation |
| 01/17/1991 | DE3922481A1 Flow regulator esp. for waste water channels - varies plane of curvature of curved tube section to adjust flow cross-section, ensuring uniform flow |
| 01/15/1991 | US4985148 Improved separator tank construction |
| 01/12/1991 | WO1991000942A1 Manhole cover |
| 01/12/1991 | CA2035884A1 Manhole cover |
| 01/10/1991 | DE3921774A1 Sewage treatment basin - has cover sections removable by travelling overhead crane and heated pipes |
| 01/10/1991 | DE3921126A1 Polymeric protection of walls of fluid separator - in which diffusion through walls by aggressive fluids is prevented by polyethylene lining embedded into walls by projections |
| 01/10/1991 | DE3920196A1 Trash-removal equipment from gutter - has inclined cylindrical grille of smaller free cross=section at bottom end |
| 01/09/1991 | CN1048423A Rain grid made of reinforced concrete and its production |
| 01/08/1991 | US4983284 Heated sump assembly for a grease/oil separator |
| 01/08/1991 | US4982653 Method and apparatus for ventilating an enclosure accessed by a manhole |
| 01/03/1991 | DE3921766A1 Outlet from rain-water tank with throttling device - is actuated by float and lever connected to slotted cam |
| 01/03/1991 | DE3920083A1 Low density fluid separator - has a coalescence or filter insert, installed in sections or as a folded, hinged unit which is unfolded when in position |
| 01/02/1991 | EP0405520A1 Method of making shafts |
| 12/27/1990 | EP0403546A1 A device for controlling fluid flow. |
| 12/21/1990 | CA2000003A1 Backwater escape valve |
| 12/18/1990 | US4978250 Discharge fitting for a tiled floor |
| 12/13/1990 | WO1990015201A1 Vacuum collecting vessel for flushing water |
| 12/13/1990 | WO1990015199A1 Pressure-generating hollow body |
| 12/13/1990 | DE3918343A1 Liq.-liq. separator - comprising gravity separator provided with small opening equalising chamber and heavy liq. outlet |
| 12/07/1990 | WO1990014874A1 Device for separating light liquids |
| 12/05/1990 | EP0401146A1 Fastening means for joining two parts of a traffic area |
| 12/05/1990 | EP0286662B1 Buffer tank with alveolar structure for retaining and regulating natural waters |
| 11/28/1990 | EP0399955A2 Locking element for securing a cover to a frame |
| 11/28/1990 | CN2066462U Gratings preventing sewage and rain |
| 11/15/1990 | DE3915529A1 Material-extractor from liq. in trough - has auger with no bearings at bottom or shaft at middle |
| 11/15/1990 | DE3915076A1 Rain-butt automatic flushing equipment - has valve releasing trapped air from vessel closed apart from flushing port |
| 11/14/1990 | CN2065641U Portable manpower grab |
| 11/08/1990 | DE3914702A1 Outflow quantity regulator, esp. for rain retention chamber - contains control chamber with float, independently operated choke apertures in compact construction |
| 11/07/1990 | EP0396129A1 Sewage regulator |
| 10/24/1990 | EP0393564A1 Hydraulic screw pump with true sized gap sealing |
| 10/24/1990 | EP0393094A1 Telescopic well or column pipe. |
| 10/24/1990 | CN2064378U Cage extender water fetching equipment |
| 10/23/1990 | US4964180 Shower strainer mounting assembly |
| 10/18/1990 | WO1990012166A1 Drain for surface water |
| 10/17/1990 | EP0392434A2 Process for the evacuation of a separation tank and device for the separation of settling and/or floating materials from spent water |
| 10/11/1990 | DE3910848A1 Device for regulating the discharge from an equalising tank, e.g. a stormwater retention tank |
| 10/10/1990 | CN1046007A 真空排放系统 Vacuum Release Systems |
| 10/04/1990 | WO1990011405A1 Apparatus for forming a trench |
| 10/03/1990 | EP0389880A2 Sedimentation reservoir, especially for waste water |
| 10/03/1990 | EP0389789A2 Device for removing solids from liquids flowing in a gutter |
| 09/30/1990 | CA2013521A1 Appliance for the removal of rakings and/or screenings out of a liquid flowing in a launder |
| 09/26/1990 | EP0389276A2 Liquid separating apparatus and method thereof |
| 09/22/1990 | CA2012733A1 Liquid separating apparatus |
| 09/20/1990 | WO1990010761A1 Drainage device for a flagged floor |
| 09/20/1990 | DE3908092A1 Waste-water-connecting shaft with submersible motor-driven pump |
| 09/19/1990 | EP0388196A1 Pressure sewer pumping system with check valve arrangement |
| 09/19/1990 | EP0388195A1 Pressure sewer system |
| 09/18/1990 | US4957389 Method and apparatus for sealing manholes |
| 09/18/1990 | US4957268 Disposable curb inlet drain form |
| 09/18/1990 | CA2048607A1 Apparatus for forming a trench |
| 09/12/1990 | EP0386696A1 Heavy duty floor gully |
| 09/12/1990 | EP0386403A1 Separator with a shaft construction for light and/or heavy liquids |
| 09/11/1990 | US4955752 Cover assembly with a locking mechanism |
| 09/11/1990 | CA1273780A1 Mold core with lid lowered by retracting corners |
| 09/05/1990 | EP0385150A2 Method for controlling reservoir cleaning and emptying devices |
| 09/04/1990 | WO1990010123A1 Vacuum drainage system |
| 08/29/1990 | EP0384903A1 A device for automatic circulation in a waste water pump station |