| 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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| 09/21/1988 | EP0282907A2 Cleaning conduits for waste water or sewage |
| 09/15/1988 | DE3706333A1 Device for receiving bulk material |
| 09/13/1988 | US4770562 Method of salvaging a pipe conduit buried under ground |
| 09/01/1988 | DE3741936A1 Cesspool cleaner |
| 07/21/1988 | DE3700267A1 Process and apparatus for reducing and spatially restricting exhalations of volatile substances from fluid media |
| 06/16/1988 | WO1988004387A1 A method of and apparatus for lining pipes |
| 04/05/1988 | CA1234766A1 Culvert end guard |
| 03/22/1988 | US4732405 Safety ski binding |
| 03/09/1988 | EP0258324A1 Process for restoring channels threatening to collapse, in particular profiled channels. |
| 02/17/1988 | CN87201378U Hydraulic excavator for sewer |
| 01/26/1988 | US4721182 Personnel safety device for an underground duct particularly a sewer pipe |
| 01/05/1988 | CA1231063A1 Beaver guard for drainage culvert |
| 12/15/1987 | US4713179 Removable culvert grate |
| 12/12/1987 | CN86202263U Mini liquid suction car |
| 12/10/1987 | DE3618546A1 Ball check valve for sewage lines |
| 11/26/1987 | DE3716204A1 Process and installation for improving the throughflow of a discharge pipe |
| 11/25/1987 | EP0246562A2 Method and device for modifying the flow in a sewer |
| 11/24/1987 | US4708179 Extendible hose assembly for service truck |
| 11/19/1987 | WO1987007048A1 Flow rate controller |
| 11/10/1987 | CA1229053A1 Plumbing test plug apparatus |
| 11/05/1987 | DE3602971A1 Shut-off member |
| 10/27/1987 | US4702828 Drain pipe animal guard |
| 10/14/1987 | EP0241375A1 Method and apparatus for dewatering sludges |
| 09/30/1987 | CN86203934U Pump-free vacuum self priming type liquid turck |
| 09/24/1987 | DE3546392A1 Shut-off member |
| 09/11/1987 | WO1987005365A1 Process for restoring channels threatening to collapse, in particular profiled channels |
| 08/20/1987 | DE3603804A1 Non-return valve with pin for sewage pipes |
| 07/16/1987 | WO1987004226A1 Process and device for the renovation or manufacture of underground piping |
| 07/15/1987 | EP0228998A1 Method for the repair of underground pipelines |
| 06/02/1987 | US4669503 Three-way valve |
| 06/02/1987 | US4669145 Hose reel system |
| 05/27/1987 | CN86201688U Automatic drain valve in sewer |
| 05/21/1987 | DE3540484A1 Process for disposing of the waste of gravity separators |
| 04/16/1987 | DE3533724A1 Device for regulating flow rates in an open rectangular channel |
| 04/09/1987 | DE3603825A1 Device for closing off building openings |
| 03/24/1987 | US4651558 Method and apparatus for inspecting lateral lines |
| 02/25/1987 | CN85105961A Device of suctorial transfer system used for liquid, especially for sewage |
| 02/17/1987 | US4642935 Waste plumbing roach trap |
| 01/20/1987 | US4637425 Sewer check valve with cutting seat |
| 11/25/1986 | US4624280 Automatic gate valve shut-off device |
| 11/18/1986 | CA1214259A1 Device for monitoring the interior of a conduit |
| 11/18/1986 | CA1214081A1 Coated composite material for lining passages |
| 11/04/1986 | CA1213530A1 Packer for sealing lateral lines |
| 10/07/1986 | US4616258 Device for monitoring the interior of a conduit |
| 09/24/1986 | EP0195439A2 Anti-flood valve |
| 09/24/1986 | EP0195364A2 Sewer tube having an automatic no-return valve |
| 08/26/1986 | US4607664 Plumbing test plug apparatus |
| 08/26/1986 | US4607663 For sewage conduits |
| 07/29/1986 | US4602659 Repair in holes and cracks in clay sewer pipe |
| 05/10/1986 | CN85101273A Apparatus for collecting sewage in sewer pipe |
| 04/30/1986 | EP0179389A2 Vehicle, particularly motor vehicle for sewage removal from aircraft |
| 04/29/1986 | US4585031 For sewage conduits |
| 04/22/1986 | US4584654 Method and system for monitoring operating efficiency of pipeline system |
| 03/18/1986 | US4576337 Arrangement for operating dual fluid systems |
| 03/05/1986 | EP0172966A1 Sewer relief valve |
| 02/25/1986 | CA1201035A1 Method and receptor tank for septic tank draining |
| 01/08/1986 | EP0167511A2 A device for a check valve |
| 01/02/1986 | EP0166179A1 Safety ski binding |
| 12/11/1985 | EP0164004A2 Sludge suction vehicle |
| 11/19/1985 | CA1196835A1 Automatic counterbalanced sewer valve with float closure |
| 11/13/1985 | EP0161078A1 Repairing sewer pipes |
| 10/15/1985 | US4546789 Valved access fitting |
| 10/08/1985 | US4546346 Sewer line backup detection, alarm and detention apparatus |
| 09/24/1985 | US4543183 Removal of debris from catch basins |
| 08/13/1985 | US4534082 Drainage unit for aircraft sanitation systems |
| 06/25/1985 | US4525277 Method for cleaning a septic tank |
| 06/04/1985 | US4521465 Polyurethane urea lamination |
| 05/07/1985 | US4515311 Liquid waste application system with sludge gun |
| 03/12/1985 | US4503881 Automatic counterbalanced sewer valve with float closure |
| 02/05/1985 | US4497337 For charging water into a sewer line trap from a water line |
| 02/05/1985 | CA1182029A1 Backwater drain valve |
| 01/22/1985 | US4494345 Back flow valve |
| 01/09/1985 | EP0130597A2 Sludge lifting car |
| 01/01/1985 | US4491278 Comminutor for inline flow of sewage |
| 12/12/1984 | EP0127632A1 Sewer pipe shutter with pressure cylinder for subsequent mounting |
| 11/27/1984 | US4484602 Packer for sealing lateral lines |
| 11/06/1984 | US4480655 Liquid-plug-creating device |
| 10/09/1984 | US4475571 Sewer relief valve |
| 10/02/1984 | US4474210 Surge control weir structure for sewage treatment plants and the like |
| 08/01/1984 | EP0114727A1 Packer for sealing lateral lines |
| 07/17/1984 | US4460019 Sewer and drain plug |
| 06/27/1984 | EP0111716A2 Turnable bearing |
| 06/07/1984 | WO1984002172A1 Sewer pipe shutter with pressure cylinder for subsequent mounting |
| 05/16/1984 | EP0108587A2 Remotely controllable inspection camera apparatus |
| 05/08/1984 | US4446591 Vehicle for clearing material from drains and the like |
| 04/24/1984 | US4443908 Sewer cleaning vehicle |
| 03/13/1984 | US4436622 Eductor truck |
| 02/21/1984 | US4432388 Device for preventing sewage backup in drain lines |
| 02/21/1984 | US4432384 Sewer fluid trap |
| 02/21/1984 | CA1162360A1 Eductor truck |
| 02/08/1984 | EP0100029A1 Coated compound material, process for its production and its use in the lining of outlets |
| 01/18/1984 | EP0098547A1 Improvements relating to the lining of passageways |
| 11/29/1983 | US4417598 Pneumatic valve |
| 08/17/1983 | EP0085915A2 Device for the automatic closure of sewers |
| 08/09/1983 | US4398186 Sewer back up warning system |
| 07/05/1983 | US4392128 Sewage back-up alarm |
| 07/05/1983 | US4391288 Method and a device for effecting rinsing of an inverted siphon, which forms part of a sewer |
| 06/21/1983 | US4389314 Eductor truck |
| 06/14/1983 | US4387750 Sewer clean out device |
| 05/24/1983 | CA1146996A1 Waste water conveyance apparatus |