| Patents for E03F 3 - Sewer pipe-line systems (3,593) |
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| 09/29/1992 | US5150989 Method and apparatus for locating a service pipe outlet transversely connected to a lined main pipe |
| 09/17/1992 | DE4107994A1 Pipeline seal fitted between two opposing cylindrical surfaces - has internal cavity, open to outside by aperture, and in which removable sliding aid is stored |
| 09/17/1992 | DE4107993A1 Socketed pipe joint sealing system - has lubricant-filled slide hose fitting over wedge-section seal |
| 09/08/1992 | US5145281 Method of renovating and/or protecting sewers or pipes |
| 09/02/1992 | EP0501004A1 Seal for joint, and method of installing same seal |
| 08/27/1992 | DE4105902A1 Constructional part for outflow channel in concrete stretcher - has moulded mass from which channel body with groove recess is formed with flat face surfaces having thrust seam grooves |
| 08/12/1992 | EP0498323A2 Sealed connection device for smooth pipe ends |
| 08/09/1992 | WO1992013999A1 Trench forming assembly and method |
| 08/05/1992 | CN1063324A Pvc cement flexible jointing method of sewers |
| 07/22/1992 | EP0386096B1 Improvements in or relating to the re-lining of sewers |
| 07/16/1992 | DE4100929A1 Sealing or reinforcement for sewerage pipe - uses laminated lining hose, and hardening synthetic foam, to form stiffener pipe |
| 07/08/1992 | EP0493415A1 Process and device for overhauling drains. |
| 07/08/1992 | CN2109414U Block-proof device for toilet sewer pipe of storied building |
| 07/02/1992 | DE4102283C1 Mfg. concrete pipes with inner plastics lining - which is applied as open ring with overlapping ends secured by spreaders |
| 07/01/1992 | CN2108757U Multi-joint water return bent |
| 06/24/1992 | CN1062183A Vacuum sewerage system with increased lift capabilities having electric air admission controllers |
| 06/17/1992 | EP0329678B1 Method and device for replacing damaged pipes buried in the ground |
| 05/27/1992 | EP0487135A1 Plastic pipe section for renovating a part of a pipeline without branches |
| 05/27/1992 | DE4141238A1 Connection device for stoneware - uses collar of synthetic material to join it to concrete tube |
| 05/27/1992 | DE4037073A1 Redevelopment system for sewer - uses spirally positioned woven material hose filled with building material |
| 05/20/1992 | WO1992008532A1 Vacuum sewerage system with increased lift capabilities having electric air admission controllers |
| 05/19/1992 | CA1301084C Method of drilling a branch line aperture after internal lining of a pipeline and a water plug used in the method |
| 05/07/1992 | DE4034760A1 Seal for use between underground concrete pipes - consists of sealing rings with rigid annular band, and support ring |
| 04/30/1992 | DE4133763A1 Seal for two pipe ends with cylindrical surfaces - has annular sealing compartment between them, with seal part, and protuberance of rigid material |
| 04/21/1992 | US5106234 Method and device for the construction and/or the reconditioning of pipelines and conduits |
| 04/21/1992 | US5105882 Lateral cutter device |
| 04/16/1992 | DE4039756A1 Lining underground pipe and branch - by extruding thermoplastic tubes in main and branch pipes, heating main tube at end of branch and blowing outwards to bond to branch tube |
| 04/16/1992 | DE4032696A1 Process for lining insides of pipelines - uses resin-impregnated hose with weak spot near end of branch pipe |
| 04/16/1992 | DE4031949A1 Renovation of main sewer and branch pipe - involves fitting liners made of flexible plastics tube |
| 04/08/1992 | EP0479386A1 Method for lining an elongated hollow space such as a sewer pipe, and lining hose and auxiliary hose for carrying out the method |
| 04/08/1992 | EP0479172A2 Insert sleeve connection |
| 04/07/1992 | US5102263 Method of renovating and/or protecting sewers and pipes |
| 04/02/1992 | DE4018574A1 Pipe repair tool - has pipe cutter, extruder, hot air fans for exact pipe fitting and heated cutter for clearing and sealing pipe connections |
| 03/31/1992 | US5100266 Pipe connection structure and vacuum-type sewage collecting apparatus incorporating the pipe connection structure |
| 03/26/1992 | DE4131398A1 Insertion method for pipe into concrete receptacle's wall - involves making circular hole with annular protuberance around it, and two annular stepped holders |
| 03/26/1992 | DE4029996A1 Assembly and/or dismantling mechanism for heavy fittings - has two holders, each with several slidable clamps |
| 03/25/1992 | CN2099787U Cement prefabricated sewer pipe-line on ground |
| 03/24/1992 | US5098568 Septic tank system with controllable distribution means |
| 03/19/1992 | DE4031186A1 Attachment of new plastic, reclining pipe in old service pipelines - with axial movement and flotation prevented by filled tubular film in gap in crown area between old and new pipes |
| 03/18/1992 | EP0475769A1 Method of renovating and/or protecting sewers or pipes |
| 03/18/1992 | EP0475699A1 Abandonment of a branch main |
| 03/18/1992 | EP0475309A1 Process and device for reconstructing sewers |
| 03/12/1992 | DE4128068A1 Dewatering gutter for flat surface - has congruent grooves in section end faces and end plates for profiled elastic seals |
| 03/03/1992 | US5092710 Underground tubular structural system and process for producing it |
| 02/19/1992 | CN2096589U Recovery treatment apparatus for kitchen |
| 02/18/1992 | US5088553 Lateral cutter device |
| 02/12/1992 | EP0470146A1 Apparatus for use in renovation of tube systems, in particular sewer tube systems. |
| 02/06/1992 | DE4024502A1 Pipe of hardening material - is connected by non-metallic sleeve with same coefft. of expansion |
| 02/06/1992 | DE4023542A1 Joint for plastic lining of concrete structures - has edge clips over lug and sealing weld, made using clamping strip with 2 retaining beads |
| 01/28/1992 | US5083885 Laying structure for vacuum sewer pipe of vacuum sewage collecting system |
| 01/28/1992 | US5083820 Pipe coupling |
| 01/19/1992 | CA2047354A1 Flexible entry seal arrangement |
| 01/15/1992 | EP0465892A1 Method for sealing a side conduit leading into a main pipe and device for carryinf out this method |
| 01/15/1992 | CN2093205U Drain pipeline easily to be dredged |
| 01/08/1992 | CN2092569U Ventilating device for waste water pipe |
| 01/08/1992 | CN1057697A Device for drilling holes in ground |
| 01/02/1992 | EP0463092A1 Apparatus for forming a trench |
| 01/02/1992 | EP0463083A1 Method and apparatus for forming a trench |
| 12/31/1991 | US5076731 Apparatus for bursting an existing pipe and widening the bore thereof |
| 12/31/1991 | US5076730 Earth duct tunnel enlargement apparatus and method |
| 12/27/1991 | EP0462527A1 Method for inserting and aligning the connection pipes of a liner in a conduit and apparatus for carrying out such method |
| 12/24/1991 | US5074718 Vacuum-type sewage collecting apparatus |
| 12/19/1991 | DE4117950A1 Pipe driven through ground - comprises pipe inside concrete body with end-pieces of ductile cast iron |
| 12/12/1991 | DE4117575A1 Building channels, galleries, etc. underground - involves vertical work-shaft, with drilling equipment parallel to longitudinal axis of channel, etc. to be formed |
| 12/12/1991 | DE4017657A1 Union device for connecting pipe and input conduit - involves use of liner pipe composed of several joined short pipe lengths |
| 12/11/1991 | EP0460686A1 Arrangement for the installation of at least one conduit |
| 12/10/1991 | US5071173 Plastic pipe for sewer pipe reconstruction |
| 12/05/1991 | DE4017765A1 System for renovating pipelines - uses deformable pipe of reduced cross=section to spring back inside pipeline |
| 12/04/1991 | CN2089951U Offset-type anti-leak plastic pipe fitting |
| 12/03/1991 | US5069243 Liquid level control system |
| 11/21/1991 | EP0457319A1 Sealing sleeve and its application |
| 11/20/1991 | CN1056346A Inside processing apparatus |
| 11/19/1991 | US5066165 Modular and componential trench drain system |
| 11/14/1991 | WO1991017325A1 Method and equipment for use in renovation of sewer pipes |
| 11/12/1991 | US5064314 Vacuum sewerage system with increased lift capabilities having electric air admission controllers |
| 11/05/1991 | CA1291648C Culvert end structure |
| 10/30/1991 | EP0453779A2 Method and device for milling the innerwall of an underground pipeline |
| 10/29/1991 | US5061116 Reinforced structural elements |
| 10/29/1991 | US5060698 Large-caliber pipe for thermoplastic material |
| 10/24/1991 | DE4012733A1 Underground drain-pipe repair method - presses elastic hose against lining immediately after spraying this in place |
| 10/17/1991 | WO1991015345A1 Waterproof and corrosion resistant concrete articles and process of preparing the same |
| 10/17/1991 | DE4023695A1 Pipe laying equipment for sewers - comprises solid body with flat underside, and concave upper side to accommodate pipes |
| 10/15/1991 | US5056269 Apparatus for working in pipes |
| 10/09/1991 | EP0450220A1 Method of renovating and/or protecting sewers or pipes |
| 10/08/1991 | US5054976 Inside processing apparatus |
| 10/08/1991 | CA1290318C Pipe burster |
| 09/26/1991 | DE4004754A1 Seal for pipe connection - consists of elastomeric reinforced pipe with end sections and radially protruding ridges and sealing lips |
| 09/24/1991 | CA1289342C Prefabricating concrete arches in adjustable mould of jointed sections |
| 09/19/1991 | WO1991014054A1 Improvement in a sewage |
| 09/12/1991 | DE4015111A1 Multi-compartment hose line for pipeline cleaning pig - has supply data and pulling cables housed in designated compartment |
| 09/11/1991 | EP0445462A1 Electric air admission controller |
| 09/10/1991 | CA2028587A1 Electric air admission controller |
| 09/04/1991 | EP0444646A2 Laying structure for vacuum sewer pipe of vacuum sewage collecting system |
| 09/03/1991 | US5044836 Electric air admission controller |
| 09/03/1991 | US5044824 Method and apparatus for locating a service pipe outlet transversely connected to a lined main pipe |
| 08/28/1991 | EP0443608A1 Appliance for preventing water from leaking through joint |
| 08/14/1991 | EP0441415A2 Inside processing apparatus |
| 08/14/1991 | DE4004362A1 Repair of damaged storm gutters - requires removal of grating seating and part of gutter side before fixing reinforcing anchors and filling with concrete |
| 08/01/1991 | DE4101525A1 Seal between hollow concrete components - uses permanently plastic material partly filling one groove accommodating sealing strip |
| 07/30/1991 | CA1286887C Sewer renovation |