| Patents for F16L 55 - Devices or appurtenances for use in, or in connection with, pipes or pipe systems (25,887) |
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| 04/10/1991 | EP0420949A1 Skid-controlled brake installation, in particular one for motor vehicles. |
| 04/10/1991 | EP0256140B1 Method for lining pipelines |
| 04/10/1991 | CN2074852U Pipeline test valve |
| 04/04/1991 | WO1991004438A1 Process for sealing or finishing structural components |
| 04/04/1991 | WO1991004437A1 Process and device for cleaning drains |
| 04/04/1991 | WO1991004074A1 Pipe grommet |
| 04/04/1991 | DE3931775A1 Coating machine for interior of sewers - consists of cylinder drawn along in sewer and has outer inflated rubber sleeves with annular space fed with sealing material |
| 04/03/1991 | EP0419470A1 Tube for lining of pressure water pipes. |
| 04/03/1991 | CN2074410U Heat insulating, damping ventilating duct |
| 04/02/1991 | US5004275 For pipeline repair |
| 04/02/1991 | US5004209 Dry disconnect coupling and safety cap for portable tanks |
| 03/28/1991 | DE3930722A1 Rohrschott A pipe seal |
| 03/27/1991 | EP0418720A1 Method for renewing catch water drains in garbage dumps, and device to realize the method |
| 03/27/1991 | EP0418692A1 Method for the sealing or the renovation of constructions |
| 03/27/1991 | EP0418257A1 Rehabilitating underground pipes. |
| 03/27/1991 | CN1012210B Lining of pipes |
| 03/26/1991 | US5002317 Internal expansion coupling device |
| 03/26/1991 | US5002093 Repair patch for tubular fluid-containing vessel |
| 03/21/1991 | WO1991003677A1 Winching apparatus |
| 03/20/1991 | EP0418097A1 Apparatus and method for absorbing the vibration energy of a vibrating tube |
| 03/20/1991 | EP0418008A1 Pipe clamp |
| 03/20/1991 | EP0417184A1 Pipe for relining underground pipelines. |
| 03/20/1991 | CN2073525U Locking device of wedge type |
| 03/19/1991 | US5000222 Tamper resistant adjustment range control for the adjustment screw of a control device |
| 03/14/1991 | DE3928843A1 Block for fitment for attachment to pipe - consists of stopper, sealing-ring, socket and internally threaded insert |
| 03/13/1991 | EP0416554A1 Liquid supply system comprising a pressure vibration damping device |
| 03/13/1991 | EP0416051A1 Antilock hydraulic braking system. |
| 03/13/1991 | EP0394405A4 Pipe liner and method of installation thereof |
| 03/12/1991 | US4998754 Drainpipe joint |
| 03/12/1991 | US4998609 Damper for hydraulic clutch actuator |
| 03/07/1991 | WO1991003673A1 Method for trenchless replacement of a pipeline |
| 03/07/1991 | DE4021456A1 Renovation of localised damage in sewer pipes - in which resin impregnated mat is expanded against damaged wall and tapered resin rings are formed by inflation jacket at repair ends |
| 03/07/1991 | DE3929566A1 Connection for fluid pipes and containers - has threaded segments, with bolt, seal and housing and compression spring |
| 03/07/1991 | DE3929558A1 Sealing joint between mains drain and house connection - involves resin-impregnated insert, placed into house pipe without excavation of ground |
| 03/07/1991 | DE3929325A1 Double-walled line pipe - made of specified material for both pipes and is monitored for leakage |
| 03/07/1991 | DE3929017A1 Machine for placing pipe in trench - consists of cutter rim, pulley, screw conveyor and motor |
| 03/07/1991 | CA2040424A1 Method for trenchless replacement of pipeline |
| 03/06/1991 | WO1991003369A1 Construction method of reversal tube lining on conduit without excavation |
| 03/06/1991 | EP0415690A2 Stress relief device |
| 03/06/1991 | EP0210195B1 Ball-point writing instrument containing an aqueous ink composition |
| 03/06/1991 | CN2072632U Pipe caulking unit |
| 03/05/1991 | US4997212 Internal expansion pipe coupling member |
| 03/05/1991 | US4996940 Method and apparatus for internally coating and strengthening conduit |
| 03/05/1991 | CA1281047C Breakaway hose coupling |
| 02/27/1991 | EP0414578A1 Temporary or permanent blocking of the bore of a pipe |
| 02/27/1991 | EP0414577A1 Temporary or permanent blocking of the bore of a pipe |
| 02/27/1991 | EP0414576A1 Temporary or permanent blocking of the bore of a pipe |
| 02/27/1991 | EP0413883A1 Insert for a pipe clamp |
| 02/27/1991 | EP0413767A1 Process for waterproofing a deteriorated drainage channel and giving it mechanical strength and chemical resistance |
| 02/27/1991 | EP0413710A1 Device for sealing damaged walls of containers or tubes. |
| 02/27/1991 | EP0298986B1 Apparatus and method for sealing a tube joint |
| 02/27/1991 | EP0273960B1 Device with a valve function |
| 02/26/1991 | US4995949 Orifice sizing using chemical, electrochemical, electrical discharge machining, plating, coating techniques |
| 02/26/1991 | US4995929 Method of protecting conduits including helically winding a strip |
| 02/26/1991 | US4995761 Method and apparatus for repairing ruptures in underground conduits |
| 02/26/1991 | CA1280579C Method and apparatus for remotely replacing tube ends in a heat exchanger |
| 02/24/1991 | WO1991002920A1 Method and apparatus for repairing ruptures in underground conduits |
| 02/21/1991 | WO1991002186A1 Pipework insert device |
| 02/20/1991 | EP0413495A1 Liner for pipeline repair |
| 02/20/1991 | EP0413494A1 Method for water leakage prevention in pipeline and liner for water leakkage prevention |
| 02/20/1991 | CN1049404A Mounting method for hose connector and its rotor type mounting line |
| 02/19/1991 | US4994307 Permanent fogging system for gas mains |
| 02/19/1991 | US4993512 Exhaust duct part in particular for an internal combustion engine |
| 02/13/1991 | EP0412752A1 Pipe liner and method of installation thereof |
| 02/12/1991 | US4991879 Method and apparatus for joining two relatively movable members |
| 02/12/1991 | US4991798 Apparatus for filling cryogenic engines of a launcher with automatic separation on lift-off |
| 02/12/1991 | US4991651 Pipeline packer for plugging a pipeline at a desired location |
| 02/12/1991 | US4991626 Breakaway coupling, conduit system utilizing the coupling and methods of making the same |
| 02/12/1991 | CA1280103C Tube closure device |
| 02/07/1991 | CA2000955A1 Pipe liner and method of installation thereof |
| 02/06/1991 | EP0411338A2 Device for carrying out improvement work on a damaged pipeline which is no longer accessible |
| 02/06/1991 | EP0411278A1 Method and apparatus for destroying an underground pipe |
| 02/06/1991 | EP0410999A1 Seal between a liner pipe and a surrounding exterior pipe |
| 02/05/1991 | US4991006 Apparatus using an everted hose for inspecting the interior of a lateral pipeline |
| 02/05/1991 | US4989626 Apparatus for and method of controlling the opening and closing of channel for liquid |
| 01/31/1991 | DE3923707A1 Machine for replacing underground pipes - consists of pipe thrust drive with starting and finishing pits |
| 01/30/1991 | EP0410125A1 Piston unit with rolling membrane |
| 01/30/1991 | EP0410081A1 Pressure reducing valve |
| 01/30/1991 | EP0409955A1 Apparatus for cleaning the inner surfaces of tubes in operating multi-tube heat transfer devices |
| 01/30/1991 | EP0379493A4 Slip control for helically wound pipes |
| 01/29/1991 | US4988130 Metal seal flange assembly |
| 01/29/1991 | CA1279741C Grouting composition |
| 01/29/1991 | CA1279584C Sewer pipe relining method |
| 01/24/1991 | WO1991000977A1 Device to limit the flow of lubricant through a rotating shaft |
| 01/24/1991 | DE3924085A1 Controlled-slip braking system esp. for motor vehicle - has noise-abating elastomer tubing with defined vol. expansion and throughflow length within pump housing |
| 01/24/1991 | DE3923028A1 Throttle element for flexible servo pipes - uses combination of central bore and radial bores |
| 01/23/1991 | EP0409688A1 Process and installation for supplying gas to a gas distribution network |
| 01/23/1991 | EP0408598A1 Device for works in for instance pipelines |
| 01/23/1991 | EP0213163B1 Sound attenuation box |
| 01/22/1991 | US4986502 Safety drain plug |
| 01/22/1991 | US4986314 Apparatus for carrying out repair works on a damaged pipeline which a person cannot get through |
| 01/22/1991 | US4986313 Sealing plug for a steam-generator tube |
| 01/22/1991 | US4986312 Flow control device |
| 01/21/1991 | WO1991001452A1 Flow conditioner |
| 01/16/1991 | EP0408454A1 Device for restricting the oil flow in a rotating shaft |
| 01/16/1991 | EP0407721A1 Device for the damping of pressure pulsations |
| 01/16/1991 | EP0407575A1 Apparatus and instrument used to line branched pipe |
| 01/10/1991 | WO1991000471A1 Pipe joint mechanism having high maintainability |
| 01/09/1991 | EP0406876A2 Device for the renovation of sewer pipes with an inner pipe coated with a resin |
| 01/08/1991 | US4983071 Pipe bursting and replacement apparatus and method |