| Patents for F16L 55 - Devices or appurtenances for use in, or in connection with, pipes or pipe systems (25,887) |
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| 09/24/1991 | CA1289601C Obstacle surmounting aid for tracked vehicle |
| 09/19/1991 | WO1991013790A1 Extensible hose for reducing pressure pulses |
| 09/19/1991 | WO1991013785A1 Adjustable pressure variable response fluid brake system regulators |
| 09/19/1991 | WO1991013559A1 Improvements relating to the manufacture of tubular materials (tube without overlap) |
| 09/19/1991 | DE4107901A1 Pressure sleeve for defective pipe - consists of metal pre-stressed thin band or wire wound in several layers |
| 09/19/1991 | DE4008252A1 Metal sleeve for pipe leakage point - consists of ring around sleeve ends, recess, with coated spirals |
| 09/19/1991 | CA2078149A1 Adjustable pressure variable response fluid brake system regulators |
| 09/18/1991 | EP0447294A1 Elastic anti-vibration sleeve, particularly for an outlet connector and process for making an elastic anti-vibration sleeve |
| 09/18/1991 | EP0446841A1 Metallic sleeve for bridging a leakage in a pipe |
| 09/17/1991 | US5049003 Method and apparatus for repairing ruptures in underground conduits |
| 09/17/1991 | US5048570 Multisectioned nozzle dam |
| 09/17/1991 | US5048174 Method and apparatus for lining a buried pipe with a polymer lining |
| 09/17/1991 | CA1289061C Pipe connector and method of applying same |
| 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 | DE4011136C1 Sleeve for sealing leaking pipe - has rings of shape retaining alloy spaced along periphery of sleeve |
| 09/11/1991 | EP0445326A1 Apparatus for inserting a plastic tube in a pipeline |
| 09/11/1991 | CA2077891A1 Manufacture of tubular materials (tube without overlap) |
| 09/10/1991 | US5046903 Method and apparatus for conducting operation in pipe |
| 09/09/1991 | WO1991014127A1 Apparatus for inspecting the interior of a lateral pipeline |
| 09/09/1991 | CA2075709A1 Apparatus for inspecting the interior of a lateral pipeline |
| 09/05/1991 | WO1991013284A1 Device for closing pressurized medium channels |
| 09/05/1991 | WO1991013283A1 Method of trench-free replacement of pipeline |
| 09/05/1991 | DE4039085A1 Sealing device for hydraulic fluid channel - has at least two spheres, preventing abrasive particles from interference fit of first sphere reaching hydraulic fluid |
| 09/04/1991 | EP0444974A1 Method and device for the replacement of underground pipelines |
| 09/04/1991 | EP0444217A1 Method for trenchless replacement of a pipeline |
| 09/03/1991 | US5044824 Method and apparatus for locating a service pipe outlet transversely connected to a lined main pipe |
| 09/03/1991 | US5044511 Manufacture and method of producing a resilient diaphragm suitable for liquid pressure tanks |
| 09/03/1991 | US5044405 Method and apparatus for repair-lining of short sections of pipe |
| 09/03/1991 | US5044404 Vacuum and control system sealing caps and plugs |
| 09/03/1991 | US5044403 Dirt and moisture sealing pipe plug for sealing different size pipe |
| 09/03/1991 | US5044393 Shell cutter |
| 09/03/1991 | CA1288454C Pressure-tight plug coupling |
| 09/03/1991 | CA1288361C Clamp |
| 09/03/1991 | CA1288315C Temperature compensated control valve, particular for hydraulic control systems for motor vehicles |
| 08/29/1991 | DE4105446A1 Closure piece for gas pipe - consists of flexible inflatable part with opening, and cylinder, piston and hollow bar |
| 08/28/1991 | EP0443720A2 Tapered expansion sealing plug |
| 08/28/1991 | CN2083678U Pipe line extensible tool |
| 08/28/1991 | CN1054128A Rapid leakage-blocking method for pressure bearing installation and apparatus thereof |
| 08/27/1991 | US5042532 Expandable tube apparatus for repairing pipelines |
| 08/27/1991 | US5042108 Hollow cylindrical body |
| 08/22/1991 | WO1991012460A1 Method of water stopping in pipeline, construction of connecting portion of pipeline and water stop material |
| 08/22/1991 | WO1991012459A1 An emergency shut-off device |
| 08/21/1991 | EP0441982A1 Construction method of reversal tube lining on conduit without excavation |
| 08/21/1991 | EP0441887A1 Method of processing orifices. |
| 08/21/1991 | EP0441812A1 Pipe repair apparatus |
| 08/21/1991 | CN2083236U Pipeline leak-stopping clamp |
| 08/20/1991 | US5040922 Method for repairing an inaccessible sewage pipe leading away from a house using a remote-controlled apparatus operating in the main sewage pipe |
| 08/20/1991 | US5040283 Method for placing a body of shape memory metal within a tube |
| 08/20/1991 | CA1287784C Flow regulating device |
| 08/14/1991 | EP0441686A1 Sealed connection device for two identical pipes |
| 08/14/1991 | EP0441415A2 Inside processing apparatus |
| 08/14/1991 | EP0441137A1 Pipe arrangement between a master and slave cylinder of a hydraulic driven clutch placed in the transmission system of an automotive vehicle |
| 08/14/1991 | CN2082801U Sealing packing injection gun of heating pipeline compensator |
| 08/14/1991 | CN1013506B Method for placing body of shape memory metal within tubing |
| 08/13/1991 | US5038830 Pipe and sealing device |
| 08/13/1991 | US5038829 Sewer line clean out units |
| 08/13/1991 | US5038823 Device for preventing water hammer while regulating water pressure |
| 08/13/1991 | US5038818 Insertion assembly for a pipe completion plug |
| 08/08/1991 | WO1991011652A1 Drive device for a conduit inspection treatment and maintenance apparatus |
| 08/08/1991 | WO1991011606A1 Fuel-injection nozzle with an overflow-oil line |
| 08/08/1991 | DE4003521A1 Hydraulic clutch actuation system - has master cylinder connected to slave cylinder by two pipes to damp out vibration |
| 08/07/1991 | EP0440360A1 Flow through accumulator |
| 08/06/1991 | US5037879 Polyurethane composition with reduced water to prepolymer mix ratio |
| 08/06/1991 | CA1287339C Manual relief gas vent |
| 08/02/1991 | CA2034852A1 Process and device for replacing an underground pipe |
| 07/31/1991 | EP0439192A1 Pressure pulsation absorbing device |
| 07/31/1991 | EP0438990A1 Coupling for pipes made of plastic |
| 07/31/1991 | CN2081929U Flexible telescopic joint of straight pipe |
| 07/30/1991 | US5035539 Liner for pipeline repair and method for repairing pipelines |
| 07/30/1991 | US5035266 Mechanical plug for clean-out tees |
| 07/30/1991 | US5035265 Structure of pipe plug |
| 07/30/1991 | US5035256 Two-way valve for fitting to the downstream end of a fluid distribution pipe adapted to be cleaned by scraping |
| 07/30/1991 | US5035021 Scraper for liquid distribution pipes, especially for petroleum products |
| 07/30/1991 | CA1286963C Method for lining pipe lines |
| 07/30/1991 | CA1286945C Device for ventilating a closed conduit system |
| 07/30/1991 | CA1286887C Sewer renovation |
| 07/26/1991 | WO1991011283A1 Lateral cutter device |
| 07/26/1991 | CA2074731A1 Lateral cutter device |
| 07/25/1991 | WO1991010839A1 Damper for hydraulic clutch actuator |
| 07/23/1991 | US5034180 Method for installing a substantially rigid thermoplastic pipe in an existing pipeline |
| 07/23/1991 | US5033585 Device for controlling lubricant flow |
| 07/23/1991 | US5033512 Replacement pipe section for a defective pipeline |
| 07/23/1991 | US5033511 Device for the pressure-sealed obturation of a portion of a primary duct of a pressurized-water nuclear reactor |
| 07/23/1991 | US5033504 Automatic relief valve |
| 07/23/1991 | US5033502 Apparatus for supplying a gas to a gas utilizing network |
| 07/23/1991 | CA1286581C Process and apparatus for installing a new pipe inside an existing pipe |
| 07/19/1991 | WO1991010555A1 Improvements relating to the lining of pipelines or passageways |
| 07/19/1991 | CA2073176A1 Lining of pipelines or passageways |
| 07/16/1991 | US5032350 System for installing a steam generator nozzle dam |
| 07/16/1991 | US5032342 Process for producing a suspension eye for exhaust system of a motor vehicle |
| 07/16/1991 | US5032185 Method and apparatus for removing paraffin from a fouled pipeline |
| 07/16/1991 | CA1286336C Device for joining of pipelines |
| 07/11/1991 | WO1991010862A1 Method for lining the inside of an accessible pipe and tunnel ring for implementing same |
| 07/11/1991 | WO1991010071A1 Locking device |
| 07/11/1991 | CA2073433A1 Method for lining the inside of an accessible pipe and tunnel ring for implementing same |
| 07/10/1991 | EP0436357A1 Vacuum sewer arrangement |
| 07/10/1991 | EP0436060A1 Method of relining of cavities, especially for the renovation of damaged ducts and pipelines |
| 07/10/1991 | EP0435945A1 Method and apparatus relating to pipe renovation |
| 07/10/1991 | CN1013147B Method and apparatus for lining buried pipe with polymer liner |
| 07/09/1991 | US5030487 Heat recoverable article comprising conductive polymer compositions |