Patents
Sitemap › F16 - Engineering elements or units; General measures for producing and maintaining effective functioning of machines or installations; Thermal insulation in general › F16L - Pipes; Joints or fittings for pipes; Supports for pipes, cables or protective tubing; Means for thermal insulation in general › F16L 9 - Rigid pipes
Patents for F16L 9 - Rigid pipes (18,006)
11/1991
11/21/1991DE4014618A1 Bactericidal cement conduits etc., for waste water - made using residual dust and ashes from burning refuse, bound in elution resistant form
11/19/1991US5065795 Prestressed concrete articles
11/19/1991CA1292154C Multilayer coated corrosion resistant metal pipe
11/13/1991CN2088631U Double-metal combined tube
11/12/1991US5063969 Self-erecting spiral metal tube with one textured side
11/06/1991CN2088192U Ventilating duct made of glass fibre reinforced plastic
11/06/1991CN2088191U Silex glass specials
11/05/1991US5062914 Method for affixing a metallic tip to a tube made of composite wound material
10/1991
10/31/1991WO1991016156A1 Tapered conduit
10/31/1991DE4013333A1 Machine for laying composite pipes - consists of coiled liner and strip with elongated reinforcement ridges and elongated hole
10/30/1991EP0302061B1 Pipe for relining underground pipelines
10/29/1991US5061121 Fluid-conveying conduit
10/29/1991US5060698 Large-caliber pipe for thermoplastic material
10/29/1991US5060696 Plastic pipe comprising an outer corrugated pipe and a smooth inner wall
10/22/1991US5058567 Flexible tube of endoscope and method of and apparatus for producing the same
10/22/1991US5058409 Apparatus for manufacturing wrinkled pipes
10/22/1991CA1291050C End adapter for flexible corrugated tube
10/17/1991WO1991015345A1 Waterproof and corrosion resistant concrete articles and process of preparing the same
10/16/1991CN2086841U Thin-wall pressure pipe for culvert
10/16/1991CN2086840U Composite tube made of steel and glass fibre reinforced plastics
10/15/1991US5056993 Liquid intake mechanism for rotary vane hydraulic motors
10/15/1991US5056346 Method and device for manufacturing bellows pipe
10/09/1991EP0450865A2 Structural support
10/08/1991US5054185 Method of fabricating double pipe
10/08/1991CA1290263C Double-containment thermoplastic pipe assembly
10/02/1991EP0449795A1 Process and device for applying a detector wire in a cable duct
10/02/1991EP0449600A2 Multilayer tubing made from metal and production process therefor
10/01/1991CA2039407A1 Multilayer tubing made from metal and production process therefor
09/1991
09/24/1991US5051034 Magnetically detectable plastic pipe
09/19/1991WO1991014124A1 Composite tubular member with multiple cells
09/17/1991US5048732 Transfer tube
09/17/1991US5048572 Vibration damping heat shrinkable tubing
09/16/1991WO1991014123A1 Composite tubular member with axial fibers adjacent the side walls
09/11/1991EP0445904A2 Method of manufacturing a thick-walled high-pressure metal tube
09/11/1991EP0445706A2 Multi-layer fuel pipes
09/11/1991CN2084544U Steel armoured insulation directly bury pipe
09/10/1991US5047104 Profiles of composite fibrous materials
09/10/1991US5046531 Synthetic resin pipe for underground use
09/10/1991US5046351 Mold for forming a groove in a tube
09/05/1991DE4005772A1 Braided rod or tube mfr. - uses resin immersed fibre strands spirally wound around core to give braided body with high torsional strength
08/1991
08/28/1991EP0443078A1 Pipe-section for buried and insulated pipelines
08/27/1991US5043116 Process for producing one end-sealed ceramic double wall-structural tubes
08/21/1991EP0442457A2 Heat resistant pipe or liner
08/20/1991CA1287724C Modular building system for wide section covered structure, and related construction process
08/08/1991DE4103230A1 Multi-wall steel pipe - formed from copper-coated roughened steel strip
08/07/1991EP0439596A1 Bactericidal and fungicidal material for use in the manufacture of air-conditioning ducts.
07/1991
07/31/1991CN2081927U Insulation pipe with internally heating spacing sleeve
07/30/1991US5036210 Magnetically detectable plastic pipe
07/30/1991US5035850 Casting A Mixture Of A Hydrophilic Resin And A Hardener To Form A Corrosion Protective Resin Layer On An Inner Surface
07/23/1991US5034253 Pipe for circulating warm water
07/10/1991EP0436520A1 Extended-life polyethylene gas distribution pipe
07/09/1991US5030489 Plastic molding for pipe systems
07/04/1991CA2033486A1 Extended-life polyethylene gas distribution pipe
07/03/1991EP0435588A2 Air intake duct and method for making same
07/03/1991EP0434791A1 Composite plastic pipe.
07/03/1991EP0434755A1 Extruded biaxially stretched foam plastic pipe and procedure for the manufacture thereof
07/03/1991EP0434740A1 Extruded radially stretched plastic pipe and procedure for manufacturing such a pipe
06/1991
06/26/1991EP0433440A1 Pipe connection for advance working pipes laid underground by an advance working technique.
06/26/1991CN1012983B Copper-clad-steel bimetallic tube and preparation method thereof
06/25/1991US5025834 Mounting plate storing conductor function
06/25/1991CA1285232C Longitudinally-divided sleeve tube for cable sleeves
06/25/1991CA1285187C Aramid composite well riser for deep water offshore structures
06/13/1991WO1991008101A1 Plastic pipe with a wall made up of a plastic-filler layer
06/05/1991EP0429457A1 Conduit liner assembly
06/04/1991CA1284678C Assembly for establishing an electrical connection through a duct made of several elements and method for inserting said assembly into said duct
05/1991
05/29/1991EP0428834A2 Multilayered plastic lining for vehicle conduits fabricated by coextrusion
05/29/1991EP0428833A2 Plastic vehicle conduit fabricated by coextrusion
05/29/1991DE3939052A1 Co-extruded plastic waste water pipe
05/28/1991US5018260 Supports for double-containment thermoplastic pipe assemblies
05/23/1991DE4010555C1 Non-wearing pipe for carrying abrasive fluids - includes hardened steel liner pipe enclosed by welded outer jacket
05/15/1991EP0426703A1 Pressure-tube of vinylchloride plastic.
05/15/1991EP0426696A1 An exhaust pipe and a method for manufacturing it
05/15/1991CN1051411A Exhaust silencer
05/15/1991CN1051410A Exhaust silencer and method of mfg. it
05/14/1991CA1284009C Fiber reinforced plastic pipe and centrifugal casting method for manufacturing same
05/08/1991EP0426147A2 Concrete pipe having a corrosion resistant inner lining, suitable pipe connection pieces and sealing arrangements integrated into the end pieces of the pipes
05/08/1991EP0425950A2 Construction erected from plates or shells of glass.
05/08/1991EP0216766B1 A permanent conforming pipe for conducting fluids and the like and method for producing the same
05/08/1991DE4034953A1 Concrete pipe with anti-corrosion inner living
05/04/1991CA2029144A1 Concrete pipe with a lining resistant to corrosion and with fitting connecting members and furthermore with sealing means integrated in the terminal parts of the pipe
04/1991
04/30/1991US5011049 Multilayer; high density ceramic core bonded to low density ceramic shell
04/24/1991EP0423849A2 Process to enwrap a piece of steel with a plastic layer
04/23/1991US5009941 Tube or pipe formed a thermoplastic powder impregnated fiberglass roving
04/23/1991CA1283370C Corrugated pipe
04/18/1991WO1991004795A1 U.v. resistant zinc coated pvc or related plastic pipe
04/16/1991US5008061 Process for the manufacture of seamless metal-clad fiber-reinforced organic matrix composite structures
04/16/1991US5007462 Synthetic resin underground pipe having high pressure-withstanding capability
04/10/1991EP0239571B1 Multi-layer hollow body, process for its production and its application
04/09/1991US5006602 Polyvinylidene fluoride compositions and products made therefrom
04/09/1991US5005755 Flexible tube of endoscope and method of and apparatus for producing the same
04/09/1991CA1282650C Method of creating profiling projections on plastic-covered steel parts as wellas plastic-covered steel parts provided with profiling projections
04/03/1991EP0419547A1 An exhaust pipe
04/03/1991CN2074409U Steel-plastics pipeline components lined inside and covered outside with plastics
04/02/1991US5004629 Forming a multilayered ceramic oxide shell over a high density ceramic oxide tube
03/1991
03/30/1991CA2025687A1 U.v. resistant zinc coated pvc or related pipe
03/27/1991CN2073964U Chemical round tube
03/27/1991CN1012209B Connecting method of composite pipe
03/23/1991CA2025725A1 Large-calibre pipe of thermoplastic material
03/20/1991EP0417876A1 Pipe element for assembling a canal
03/20/1991CN2073522U Concrete water pipe with ability of no seepage
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