| Patents for E03F 7 - Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools (2,571) |
|---|
| 02/17/1993 | CN1069095A Sewer drainpipe self-through apparatus-guanguantong |
| 02/16/1993 | US5186052 Storm water flow monitoring |
| 01/05/1993 | US5176172 Toggle linkage check valve |
| 01/05/1993 | CA1312258C Water backup preventing system and monitoring system therefor |
| 12/16/1992 | CN2124964U Device for restraining rat in channel |
| 12/15/1992 | US5172332 Automatic fluid sampling and monitoring apparatus and method |
| 12/10/1992 | WO1992021830A1 Means for barring animals, in particular rats, from entering a network of tubes, for instance a section of a sewerage system |
| 11/17/1992 | US5163480 Conduit isolation diaphragm assembly |
| 11/11/1992 | EP0512392A1 Sludge suction vehicle |
| 11/10/1992 | US5161911 Water backup preventing system and monitoring system therefor |
| 10/29/1992 | DE4113905A1 Suction tube holder for waste disposal tank lorry - has several stacked holder levels, with parallel guide rails, and connecting section at one end |
| 09/30/1992 | EP0506028A2 Cleaning device |
| 09/30/1992 | EP0425530B1 Closure device for drainpipes |
| 09/08/1992 | US5144975 Automatic antifreeze back-up valve for sewer |
| 08/25/1992 | US5141017 Recreational vehicle sewage removal adapter with back-flushing capability |
| 08/19/1992 | EP0499153A1 Process for partially restoring a sewer buried in the ground |
| 08/12/1992 | CN2112657U Anti-blocking device for sewer |
| 07/29/1992 | EP0496604A2 Check valves |
| 07/22/1992 | CN2110669U Foul water one-way valve |
| 07/21/1992 | US5131433 Apparatus for blocking fluid flow through a conduit |
| 07/16/1992 | DE4114212C1 Water mains cleaner, using sudden pressure drop - has common magnetic control valve in front of branch supply pipe |
| 06/23/1992 | US5123444 Back flow blocker in sloping pipes |
| 06/17/1992 | EP0490257A1 Tank and method for tank emptying using a piston |
| 06/02/1992 | USRE33945 Extendible hose assembly for service truck |
| 06/02/1992 | CA1302201C Sewage system isolation valve assembly |
| 05/20/1992 | CN2104892U Silt cleaner |
| 05/19/1992 | US5113901 Sewer relief valve |
| 05/14/1992 | WO1992008963A1 Automatic fluid sampling and monitoring apparatus and method |
| 05/14/1992 | DE4136292A1 Sealing device for water drain in building - consists of plate with seal and bracket fastened to floor |
| 05/14/1992 | CA2073512A1 Automatic fluid sampling and monitoring apparatus and method |
| 04/29/1992 | CN2102962U Block preventive fitter brush for sewer |
| 04/21/1992 | US5105974 Liquid level sensor cover for waste holding tank |
| 04/09/1992 | DE4031715A1 TV camera inspection of inaccessible spaces - using string of elements of independently adjustable length driven into channel and advanced by peristaltic motion |
| 04/08/1992 | EP0479302A1 Closure device for sealing flow-passages |
| 04/07/1992 | US5102537 Piping outlet protector |
| 04/01/1992 | CN2100430U Sewage cut-off device |
| 03/31/1992 | US5100266 Pipe connection structure and vacuum-type sewage collecting apparatus incorporating the pipe connection structure |
| 03/19/1992 | DE4029186A1 Monitoring system for waste water channels - electronically detects waste water escaping from and ground water entering pipes using pulse echo measurement |
| 03/17/1992 | US5096332 Method for water leakage prevention in pipeline and liner for water leakage prevention |
| 03/11/1992 | EP0474293A1 A method and device for determining joint widths between sewer pipes of a sewage system |
| 03/05/1992 | DE4027030A1 Measuring speed of flow by ultrasonic echo signals - using defined time window in reflex method for base and surface echoes for correlative evaluation |
| 03/04/1992 | CN2097861U Self-sucking sewer valve |
| 02/25/1992 | US5091863 Automatic fluid sampling and flow measuring apparatus and method |
| 02/25/1992 | US5090152 Rodent barrier for pipes |
| 02/20/1992 | DE4042396A1 Sewer leak locating system - has pressure chamber formed between double walls on travelling remote controlled machine |
| 02/12/1992 | EP0470146A1 Apparatus for use in renovation of tube systems, in particular sewer tube systems. |
| 12/24/1991 | US5074718 Vacuum-type sewage collecting apparatus |
| 12/05/1991 | DE4017238A1 Locating leaks in underground, non-metallic pipes - using electromagnetic source moving in pipe, detecting and processing electromagnetic waves contg. position information |
| 11/26/1991 | US5067850 Apparatus for detection and containment of pollutants in a drainage system |
| 11/21/1991 | DE4114837A1 Suction tube for suction-pressure vessel - has aspiration hose supported by boom pivotable around vertical axis and adjustable in vertical plane |
| 11/21/1991 | DE4016373A1 Monitoring sewage network, esp. water mixing and removal network - by measuring data at numerous positions, storing, displaying and processing data |
| 11/09/1991 | CA2016323A1 Culvert attachment for water flow and beaver control |
| 10/31/1991 | DE4012619A1 Leak location equipment for waste water channels - includes remotely controlled mobile unit with pressure chamber, over pressure generator and pressure sensors |
| 10/23/1991 | EP0344151B1 Means for repairing pipes by remote-controlled insertion of a lining |
| 10/15/1991 | CA1290578C Beaver restricting device |
| 10/08/1991 | US5054187 Method and means for remote-controlled sheathing installation when renovating pipelines |
| 09/24/1991 | US5050265 Swivel bowl wear insert for debris intake apparatus |
| 09/18/1991 | EP0358672B1 Back flow blocker in sloping pipes |
| 09/12/1991 | DE4106088A1 Flushing and emptying tank - involves port with filter connecting main part to fresh-water tank with pump |
| 09/12/1991 | DE4015112A1 Drainage pipe camera pig insertion system - uses cable tension to hold hooks securing camera pig in locked position |
| 09/12/1991 | DE4007413A1 Inflatable drain-sealing balloon - contains sliding plate acting acting against pin on outlet valve |
| 09/11/1991 | EP0445462A1 Electric air admission controller |
| 09/10/1991 | CA2028587A1 Electric air admission controller |
| 09/03/1991 | US5044836 Electric air admission controller |
| 08/21/1991 | EP0441812A1 Pipe repair apparatus |
| 08/13/1991 | US5039135 Drain trap with ice plug prevention |
| 08/13/1991 | US5038831 Flood stopper for drain systems |
| 08/08/1991 | DE4003555A1 Removable tank to receive faeces - is installed under lavatory for use in land vehicles, boats and aircraft |
| 08/06/1991 | US5037542 Protective grating with pivoting sections for culvert pipe |
| 08/02/1991 | CA2014503A1 Marker device for septic tank access |
| 07/24/1991 | EP0437465A1 Method and apparatus for removing sludge and purifying waste water. |
| 07/23/1991 | US5033510 Removable isolation baffle for wastewater conduit |
| 07/16/1991 | US5031659 Sewer line relief valve |
| 07/02/1991 | US5028910 Drain overflow alarm |
| 07/02/1991 | US5027447 Retractable guard for sewage pipes |
| 06/04/1991 | US5020567 Drainage valve having a flexible flap with an edge taper |
| 05/29/1991 | EP0334870B1 A method of and apparatus for lining pipes |
| 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 |
| 05/15/1991 | EP0426710A1 Suction waggon for disposal of sludges and liquids |
| 05/15/1991 | CN2077002U Piston high-pressure dredging unit for sewer pipe |
| 05/14/1991 | US5015371 Safety device for sealing a drain assembly |
| 05/08/1991 | EP0425530A1 Closure device for drainpipes. |
| 04/24/1991 | EP0423212A1 Water backup preventing system and monitoring system therefor |
| 04/16/1991 | US5007451 Sump protection system |
| 04/11/1991 | DE3928051A1 Operation of sewage system water mains - feeding water to process plant through channels in which flow conditions are adjusted |
| 04/09/1991 | US5006833 Sewer line restriction alarm placed in clean out plug |
| 04/09/1991 | CA1282749C Personnel safety device for an underground duct particularly a sewer pipe |
| 03/28/1991 | DE3930918A1 Combination sludge extractor and flusher |
| 03/12/1991 | US4998847 Drainage conduit which is resistant to clogging by beavers |
| 03/06/1991 | EP0415361A2 Pipe connection structure and vacuum-type sewage collecting apparatus incorporating the pipe connection structure |
| 03/06/1991 | EP0415360A2 Vacuum-type sewage collecting apparatus |
| 03/05/1991 | US4997312 Water backup preventing system and monitoring system therefor |
| 03/05/1991 | US4996725 Retractable guard for sewage pipes |
| 02/27/1991 | CN1011804B Device of suctorial transfer system used for liquid |
| 02/20/1991 | EP0413494A1 Method for water leakage prevention in pipeline and liner for water leakkage prevention |
| 02/20/1991 | EP0412976A1 A rodent barrier. |
| 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 |
| 01/15/1991 | US4985763 Jet nozzle for propelling an apparatus along a conduit and apparatus provided with such a jet nozzle |
| 01/10/1991 | DE3920665A1 Liq. extractor and collector from mobile tank |