| 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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| 05/18/1983 | EP0034590B1 A method and device for effecting rinsing of an inverted siphon, which forms part of a sewer |
| 04/26/1983 | CA1145148A1 Method and apparatus for removing deflection from plastic pipes |
| 04/06/1983 | EP0075603A1 Device for cleaning sewer pipes and for exhausting mud |
| 03/22/1983 | US4377475 Apparatus for sucking up and holding sludge |
| 02/15/1983 | US4373381 Manhole leakage indicator and method for using |
| 02/01/1983 | US4371569 Method for reinforcing and repairing piping |
| 01/18/1983 | CA1139634A1 Siphon well |
| 12/23/1982 | WO1982004471A1 Valves |
| 12/21/1982 | CA1137712A1 Mobile sewer cleaning and vacuum unit |
| 10/26/1982 | US4356087 For installation in a drain tile |
| 10/14/1982 | WO1982003417A1 Improvements in and relating to the lining of sewers, pipes, or the like |
| 09/07/1982 | CA1130960A1 Apparatus for sewer cleaning and the like |
| 08/04/1982 | EP0056833A1 A device for the closure of the sewer connection to a manhole or gully structure |
| 08/03/1982 | US4342347 Pressure dump valve |
| 07/13/1982 | CA1127501A1 Anti-backflow valve for sewer traps |
| 06/01/1982 | CA1124531A1 Sluice gate |
| 04/06/1982 | US4322868 Sewer and catch basin cleaner |
| 03/31/1982 | EP0048428A1 Sewer pipe cleaning vehicle |
| 03/31/1982 | EP0048427A1 Sludge suction vehicle |
| 03/30/1982 | US4321948 Discharge system for septic tank |
| 03/30/1982 | US4321942 Backflow preventer valve |
| 03/17/1982 | EP0047519A1 Sludge suction and receiving device |
| 03/17/1982 | EP0047489A1 Method and device for the control of water conduits against backflow |
| 03/17/1982 | EP0047482A2 Drain with clearing aperture and removable non-return valve |
| 02/09/1982 | CA1118123A1 Method and arrangement for treatment of sludge water |
| 02/09/1982 | CA1118093A1 Pipe inspection apparatue |
| 01/05/1982 | US4309128 Method and apparatus for removing deflection from plastic pipes |
| 01/05/1982 | US4308824 Apparatus for reinforcing and repairing piping |
| 01/05/1982 | CA1115466A1 Mobile sewer cleaning and vacuum unit |
| 12/29/1981 | CA1115009A1 Catch basin processing apparatus |
| 12/22/1981 | CA1114715A1 Self-contained, automatic primer valve for sewer line drain traps |
| 11/03/1981 | US4297751 Sewer system |
| 10/27/1981 | US4296778 Anti-backflow valve for sewer traps |
| 09/02/1981 | EP0034590A1 A method and device for effecting rinsing of an inverted siphon, which forms part of a sewer. |
| 07/28/1981 | US4280528 Waste water conveyance apparatus |
| 06/16/1981 | CA1102970A1 Apparatus for sewer cleaning and the like |
| 06/09/1981 | US4272640 Automatic sewage valve |
| 04/15/1981 | EP0026976A1 Method of and apparatus for restoring the diameter of plastic pipes located in an earth encompassing situ |
| 04/07/1981 | US4259983 Cleanout fitting with lockable and removable check valve |
| 01/20/1981 | US4246604 Pipe inspection apparatus |
| 12/24/1980 | WO1980002855A1 A method and device for effecting rinsing of an inverted siphon,which forms part of a sewer |
| 12/16/1980 | CA1091542A1 Backwater valve |
| 12/02/1980 | CA1090721A1 Blocking device for use in a sewer manhole |
| 11/25/1980 | US4234980 Apparatus for sewer cleaning and the like |
| 11/11/1980 | CA1089317A1 Backwater tank for a building connected to a vacuum drain facility |
| 10/29/1980 | EP0018337A1 Collecting container arrangement in a vacuum-operated waste-water system |
| 10/21/1980 | US4228978 Recreational vehicle sewer hose support |
| 09/30/1980 | US4225435 Blocking device for use in a sewer manhole |
| 08/05/1980 | US4215724 Backflow preventer for sewer system |
| 07/22/1980 | US4213479 Eduction unit |
| 06/24/1980 | US4209034 Backwater tank for a building connected to a vacuum drain facility |
| 06/17/1980 | US4207647 Mobile sewer cleaning and vacuum unit |
| 06/11/1980 | EP0011778A1 Device for flushing sewers by siphonic action |
| 06/10/1980 | CA1079197A1 Acoustical apparatus |
| 05/27/1980 | US4204556 Self-contained, automatic primer valve for sewer line drain traps |
| 04/29/1980 | US4199837 Apparatus for sewer cleaning and the like |
| 03/18/1980 | US4194218 Inspection apparatus for underground channels |
| 11/20/1979 | US4174913 Animal guard for field pipe |
| 07/10/1979 | US4160734 For removing liquid, solid and semi-solid wastes |
| 06/26/1979 | US4159248 Denatering, sewage treatment |
| 05/01/1979 | US4151688 Power boom and vacuum hose support |
| 08/22/1978 | US4108274 Acoustical apparatus |
| 08/15/1978 | US4107738 Sewer inspection device and method of scanning sewers for leaks |
| 01/17/1978 | US4068824 Power boom and vacuum hose support |
| 09/06/1977 | US4046161 Non-return valve for preventing back flow of waste waters |
| 08/09/1977 | US4040960 Waste water apparatus, pollution control |
| 08/02/1977 | US4039005 Flow diversion means |
| 07/12/1977 | US4034421 Vacuum sewer system including a collecting tank |
| 07/27/1976 | US3971400 Portable vacuum and pressure liquid tank apparatus |
| 06/22/1976 | US3964458 Service vehicle for manhole operation |
| 04/27/1976 | US3952767 Means for treating roots about drain lines |