| Patents for E03F 7 - Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools (2,571) |
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| 05/04/1995 | DE4404767C1 Device for treating aqueous sludge |
| 04/27/1995 | WO1995011354A2 Suction device |
| 04/20/1995 | DE4335188A1 High-pressure flushing or sludge-extraction (mud-suction) vehicle or combined high-pressure flushing and sludge-extraction vehicle |
| 04/18/1995 | US5406972 Backwater valve |
| 03/28/1995 | CA2133022A1 Spill containment system |
| 03/22/1995 | EP0643789A1 System and process for relining channel pipe sections. |
| 03/22/1995 | EP0643788A1 System and process for relining channel pipe sections with inspection facilities. |
| 03/02/1995 | WO1995006170A1 Method and vehicle for emptying and cleaning road gullies |
| 02/23/1995 | DE4328196A1 Device for disposing of the contents of oil or petrol separators |
| 02/21/1995 | US5391295 Spill containment system |
| 02/15/1995 | EP0638757A1 Apparatus for testing and/or repairing channels |
| 02/14/1995 | US5389821 Drainwater/sewage treatment installation for producing electrical power and for regulating a hydraulic flow |
| 02/09/1995 | DE4333690C1 Mobile device for the analysis of reflected sound for the inspection of sewer pipes from the inside on-site |
| 01/24/1995 | US5383745 Hazardous materials catch basin |
| 01/24/1995 | CA1334044C Waste tank for a vacuum sewage system |
| 01/19/1995 | DE4322260A1 Sewage-pipe flap |
| 01/10/1995 | US5379555 Temporary drain cover |
| 01/03/1995 | CA2088793C Control culvert attachment |
| 12/22/1994 | WO1994029098A1 Improvements relating to the lining of pipelines and passageways |
| 12/22/1994 | DE4401941A1 Concealed chamber examining device connected to supply cable |
| 12/22/1994 | CA2142183A1 Improvements relating to the lining of pipelines and passageways |
| 12/15/1994 | DE4319029A1 Device for checking and cleaning pipe systems |
| 12/14/1994 | CN1096245A Improvements relating to the lining of pipelines and passageways |
| 11/24/1994 | DE4328480C1 Process and vehicle for cleaning and emptying street gulleys |
| 11/23/1994 | EP0625616A2 Device for the receipt of loose and/or floating materials |
| 11/17/1994 | DE4327215C1 Apparatus for the testing and/or repair of conduits |
| 10/27/1994 | DE4332129C1 Suction line for the extraction of impurities from pipelines |
| 10/27/1994 | DE4313104A1 Method and device for inspecting sewer pipe walls |
| 10/06/1994 | DE4305956A1 Installation for discharging waste water (sewage) |
| 09/21/1994 | EP0616087A1 Communal vehicle with pressure regulating valve |
| 09/15/1994 | DE4307201A1 Temperature measuring system for locating leaks in sewage systems |
| 09/14/1994 | EP0615028A1 Communal vehicle |
| 09/13/1994 | US5345741 Silt blockage for catch basins |
| 08/03/1994 | CN1090359A Protector against settling of drainage pipe of buildings |
| 07/28/1994 | DE4240057A1 Installation for collection of water-pollutant liqs from roadway |
| 07/14/1994 | DE4300709A1 Vehicle washing station waste water cleaning process |
| 07/07/1994 | WO1994015032A1 Improvements in or relating to drain closures |
| 06/28/1994 | US5323804 Bug-proof and odor-proof draining outlet structure |
| 06/23/1994 | WO1994013894A1 Gully emptier |
| 06/21/1994 | CA1330365C Apparatus and method for controlling operation of storm sewage pump |
| 06/14/1994 | US5321601 Apparatus for controlling flow in a sewer regulator |
| 06/01/1994 | EP0599691A1 Installation for hydraulic flow control and electricity generation |
| 06/01/1994 | DE4239917A1 Hollow space testing arrangement, e.g. for channels and pipelines - has laterally flexible, axially stiff feed mechanism with external friction reducing rollers |
| 05/31/1994 | US5316589 Method for controlling street surface pollutants |
| 05/21/1994 | CA2103496A1 Power generation and hydraulic flow controlling facility |
| 05/19/1994 | DE4238738A1 Detecting leaks in non metallic, partially filled tubes - involves applying a.c. current and detecting induced voltage with inductive transducer to detect leakage of electrically conductive fluids |
| 05/17/1994 | US5312551 Treatment of septic tanks and mud dehydration |
| 05/11/1994 | WO1994010495A1 Apparatus for use in the repair and maintenance of conduits such as sewers |
| 05/11/1994 | DE4241888C1 Schlammsaugewagen Sludge suction vehicle |
| 04/07/1994 | DE4233597A1 Instantaneous sealing of street drains esp. gullies - comprises using container contg. 2 separately stored components sepd by e.g membrane which is ruptured to form expanded hardenable foam inside flexible box covering area to be sealed |
| 04/07/1994 | DE4233371A1 Measuring flow of waste water through non-siphoned waste water pipe - operating magnetic=inductive sensor with motorised choke dependent on water level in upstream chamber or channel |
| 03/29/1994 | US5299141 Automatic fluid monitoring and sampling apparatus and method |
| 03/17/1994 | WO1994005989A1 Process and device for inspecting and/or servicing and repairing subsidiary canals branching off from a main drain |
| 03/17/1994 | DE4230733A1 Emergency cover for drainage grid in floor or roadway - has soft sealing ring round outside and screw spindle with catch engaging drainage grid set in floor or road surface |
| 03/10/1994 | DE4229787A1 Underground drainage channel inspection probe for auxiliary conduits of narrow cross=section - feeds water at high pressure through nozzles located around ring at end of hose, to generate reaction force to propel probe camera through conduit |
| 02/23/1994 | EP0583646A2 Two chamber waste disposal container with ejector piston |
| 02/16/1994 | EP0582876A2 Two chamber waste disposal container with ejector piston |
| 02/15/1994 | US5287133 Self-orienting pipe inspection apparatus and method |
| 01/27/1994 | DE4223931A1 Drain-cleaning vehicle - has overhead suction hose with cleaning hose in front of cab with TV camera and searchlight |
| 01/20/1994 | DE4223368A1 Cleaning system for sand and sludge traps and benzene |
| 01/19/1994 | EP0579239A1 Process for the treatment and purification of the contents of gravity-separators, particularly for a sludge, sand and/or gasoline separator |
| 01/15/1994 | CA2073844A1 Sump valve |
| 01/13/1994 | DE4214113A1 Waste water shaft with units for sewage sample removal and taking sewage parameters - uses probe(s) immersed in waste water supplied and drained by gutter penetrating at right angles to shaft |
| 01/05/1994 | DE4220900A1 Underground hollow pipe inspection system e.g. for water supply line - has hollow body feed system which allows flexible bending but is axially rigid for moving head for carrying video camera, test sensors, etc. and connected to central power and processing units. |
| 12/16/1993 | DE4218808A1 Flush water reclamation system for street cleaning vehicle - using combination labyrinth and perforate screen filter |
| 12/16/1993 | DE4217583C1 Sealing testing device for drainage pipe connection - monitors raised or reduced pressure of test fluid in hollow space between two elastomer pipe seals supplied with test medium. |
| 12/02/1993 | DE4318290A1 Rat-free outflow pipe - causes vermin always to fall backwards through free spaces, slopes and rises |
| 11/11/1993 | DE4215090A1 Efficient vehicle for cleaning out drains and sewers - incorporates tank with piston and includes rotary piston for handling water and waste material |
| 11/03/1993 | EP0412976B1 A rodent barrier |
| 10/28/1993 | WO1993021399A1 System and process for relining channel pipe sections |
| 10/28/1993 | WO1993021398A1 System and process for relining channel pipe sections with inspection facilities |
| 10/28/1993 | DE4213068A1 System und Verfahren zum Relining von Kanalrohrabschnitten System and Method for relining of sewer pipe sections |
| 10/27/1993 | EP0566869A1 Process for fixing a gate valve frame to a wall or a concrete surface |
| 10/21/1993 | DE4311365A1 Mobile appts. for internal machining of pipes or ducts - incorporates three DC motors enabling console to rotate and move radially during advance along axis of pipe |
| 10/06/1993 | EP0563801A1 Tank |
| 09/30/1993 | DE4209654A1 Safety device for ejector piston in sludge container etc. - has elastomer ring on piston behind pressure ring to prevent deformation at container end and on piston. |
| 09/28/1993 | US5247974 Pneumatic sealing device for waste disposal systems |
| 09/23/1993 | DE4208970A1 Detecting and locating leaks in pipes, e.g. sewage pipes, - using physical, chemical, biological and=or other analysis to determine leak origin and hazard |
| 09/23/1993 | DE4208863A1 Material investigation arrangement for e.g. waste water channel walls - contains transport mechanism with signal generator contg. microwave generator and receiver connected to comparative evaluation device |
| 09/23/1993 | DE4206768A1 Emergency cover for road drains - has foam covered sealing plate with spring loaded locking handle |
| 09/14/1993 | US5244003 Telescopic drain hose |
| 09/09/1993 | DE4206609A1 Two-channel optical inspection system for pipelines and ducts - has spectral filters rotating with camera head about axis of pipe and stationary matrix image sensor |
| 09/09/1993 | DE4206608A1 Internal measuring device for determining parameters of pipes for sanitation planning - has distance sensor using triangulation, with optical axis of light source coincident with rotational axis of deflection mirror |
| 08/17/1993 | US5236009 Double check backflow preventer with improved toggle linkage check valve |
| 08/12/1993 | DE4134886A1 Inspection vehicle for drains and pipelines - has self container unit mounted on vehicle chassis and with CCTV for single handed operation |
| 08/10/1993 | US5234018 Sewer check valve and cleanout apparatus |
| 07/15/1993 | DE4243529A1 Device for working internally on pipework - has external drive unit to position independent linear, rotary and radial drives on internal operating console |
| 07/15/1993 | DE4243201A1 Testing system for inspecting walls and rear linings of sewers - has transmitter-receiver unit with aerial installed at transport unit for producing and for receiving microwaves reflected from material. |
| 07/15/1993 | DE4200249A1 Duct blocking system with at least one closing organ - alters duct cross=section and has safety unit with fresh air supply and fire extinguisher, separation wall and closing organ. |
| 07/13/1993 | CA1320234C Floor clean-out assembly |
| 06/23/1993 | EP0547977A1 Tank with moveable interior partition |
| 06/16/1993 | EP0470146B1 Apparatus for use in renovation of tube systems, in particular sewer tube systems |
| 06/02/1993 | EP0544029A1 Guide cap for floating barrage |
| 05/26/1993 | CN2134436Y Multifunction cleaning vehicle for sewage well |
| 05/11/1993 | US5209254 Water and sewerage system for construction, and protection for the same |
| 05/04/1993 | US5207031 Apparatus for use in renovation of tube systems, in particular sewer tube systems |
| 04/14/1993 | CN2129788Y Reciprocating tracting device |
| 03/03/1993 | EP0437465B1 Method and apparatus for removing sludge and purifying waste water |
| 02/24/1993 | CN1069309A Reciprocating traction device |
| 02/23/1993 | CA1313827C Rodent barrier |