| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
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| 12/02/2009 | CN201353830Y Locking device for segment mould |
| 12/02/2009 | CN201353829Y Segment production system |
| 12/02/2009 | CN101591186A Peripheral castable material for dip pipe of RH furnace and method for preparing same |
| 12/02/2009 | CN101590664A Prestressed steel cylinder pipe die |
| 12/02/2009 | CN100564804C Anti-deformation culvert pipe with super-section and centripetal stress and preparation process thererof |
| 11/25/2009 | CN201350665Y Automatic locking mechanism for tensioning machine prestress pull-rod nut |
| 11/25/2009 | CN201350664Y Choke plug used in preparation of concrete electric pole |
| 11/19/2009 | WO2009139974A2 Pressure cast concrete or mortar lined steel pipes and methods of making the same |
| 11/19/2009 | US20090287148 Joined Inflation Portions for Bifurcation Catheter |
| 11/19/2009 | CA2720118A1 Pressure cast concrete or mortar lined steel pipes and methods of making the same |
| 11/18/2009 | CN101579890A Vertical type vibratory molding process for concrete tube of lining type prestressed steel cylinder |
| 11/18/2009 | CN100560318C High-bearing capacity prestressed tubular pile and its production method |
| 11/11/2009 | CN201342724Y Vat type septic tank mould |
| 11/11/2009 | CN201342723Y Double-station core mould vibration pipe making machine |
| 11/11/2009 | CN201342722Y Material distributor for distributing materials of annular moulding chamber |
| 10/29/2009 | US20090265840 Helmet customizable by variation of inner volume |
| 10/28/2009 | CN201333749Y Centrifugal shaping device for concrete columns |
| 10/28/2009 | CN201333748Y Automatic tubular pile distributing machine |
| 10/28/2009 | CN101565980A Integral hollow pipe and manufacturing method thereof |
| 10/28/2009 | CN100553917C Die shell component forming dies |
| 10/22/2009 | US20090261070 Insulating Nozzle, Comprising a First Material and a Second Material |
| 10/22/2009 | US20090260802 Centralizer for tubular elements |
| 10/21/2009 | CN101559621A Roller-suspending method for producing large-diameter concrete pipes |
| 10/14/2009 | CN201325117Y A device for fabricating strainer pipe holes for driven well |
| 10/13/2009 | US7601288 Method of fabricating a lug on a structural element of composite material, in particular a connecting rod |
| 10/08/2009 | WO2009121581A2 Method for producing concrete prefinished parts |
| 10/08/2009 | US20090250135 Pressure cast concrete or mortar lined steel pipes and methods of making the same |
| 10/08/2009 | CA2719145A1 Method of producing concrete prefinished parts |
| 10/07/2009 | CN201320804Y Improved pipe sand pouring vibrating machine |
| 10/07/2009 | CN100546790C Asbestos-free fiber cement pipe |
| 09/30/2009 | EP1385679B1 Method of assembling a ceramic body |
| 09/30/2009 | CN101544025A Shield duct piece steel mould end side plate full-automatic open-close device |
| 09/30/2009 | CN101544024A Mould for preparing sampling hammerhead of tuyere sampler of blast furnace |
| 09/30/2009 | CN101544023A Preparation method for preformed hole split pouring fender pile |
| 09/30/2009 | CN101544022A Preparation method for preformed hole fender pile |
| 09/30/2009 | CN101544021A Preparation method for prestressed high-strength concrete octagonal pile |
| 09/30/2009 | CN101544020A Preparation method for prestressed high-strength concrete pile |
| 09/24/2009 | US20090236773 Manufacture of Inflatable Member for Bifurcation Catheter Assembly |
| 09/23/2009 | CN201313344Y Centrifugal forming machine pedestal used in cement product industry |
| 09/23/2009 | CN101538913A Hidden-buckle overhand ribbed cold-bending thin-wall steel pipe concrete and preparation method thereof |
| 09/23/2009 | CN101537661A Method and device for forming oblique and vertical rotary tube pile |
| 09/17/2009 | DE102008013768A1 Verfahren zur Herstellung von Betonrohren und Betonrohrleitungssystem A process for producing concrete pipes and concrete piping system |
| 09/16/2009 | CN201309208Y Centrifugal forming machine base with modified structure for cement industry |
| 09/16/2009 | CN101532590A Y2O3 and ZrO2 compound ceramic tube and preparation method thereof |
| 09/16/2009 | CN101531534A Y2O3 and Al2O3 compound ceramic tube and preparation method thereof |
| 09/15/2009 | CA2376525C Method and apparatus for removing forming elements from concrete pipe |
| 09/11/2009 | WO2009110778A1 Electrical service unit, production method thereof and machine for same |
| 09/11/2009 | WO2007147051A3 Method for manufacture of a counterweight apparatus |
| 09/09/2009 | CN100537170C Die shell component forming dies |
| 09/02/2009 | CN201300483Y Concrete precast element centrifugal shaping device |
| 09/02/2009 | CN201300482Y A pipe end molding device for concrete counterweight pipe |
| 09/02/2009 | CN201300481Y Concrete precast element centrifugal shaping device |
| 09/02/2009 | CN101519295A High-performance environment-friendly concrete and method for utilizing same to prepare pipe pile |
| 09/02/2009 | CN101518922A Ceramic-lined composite steel tube centrifuge |
| 08/26/2009 | CN100532909C Fiber reinforcement type brittle composite material pipeline coatings, its coating method and pipeline |
| 08/25/2009 | US7579056 Hydrophobic formulations and vessel surfaces comprising same |
| 08/19/2009 | CN201291508Y Automatic opening and closing apparatus for parallel move of tunnel concrete tunnel segment steel form side sheet |
| 08/19/2009 | CN101508143A PHC pipe pile energy-saving maintaining method |
| 08/19/2009 | CN100528506C Making process of steel mold for pretentioned prestressing spiral concrete pile |
| 08/13/2009 | WO2009099360A1 Method of making hollow concrete elements |
| 08/13/2009 | US20090200712 Method for pretreating honeycomb formed article before firing and system for pretreating honeycomb formed article before firing |
| 08/13/2009 | US20090200695 Membrane filter unit and method for the production of the membrane filter unit |
| 08/05/2009 | EP2083977A2 Formwork system for concreting prefabricated parts, comprising a formwork shell and a formwork core |
| 08/05/2009 | EP2021154A4 Mould sleeve and moulding method |
| 08/05/2009 | CN201283595Y Extrusion mould special for anti-splash pipe |
| 08/05/2009 | CN100522655C Manufacture method for artistic cement lamp stand |
| 07/23/2009 | US20090186116 Mold for extrusion forming of ceramic articles |
| 07/23/2009 | US20090184441 Microstructure roller, microstructure fabrication method, tool for fabricating a microstructure roller |
| 07/22/2009 | CN201275795Y Beveled pipe winding machine |
| 07/22/2009 | CN101486229A Hydraulic driving hinge opening and closing apparatus for tunnel concrete tunnel segment steel mould |
| 07/22/2009 | CN101486228A Hydraulic driving translational opening and closing apparatus for tunnel concrete tunnel segment steel mould |
| 07/22/2009 | CN101486227A Method for manufacturing well pipe |
| 07/21/2009 | CA2461309C Concrete pipe manufacturing machinery and methods |
| 07/16/2009 | DE19951565B4 Verfahren zum Aufbringen von elastischen Dichtungsringen auf Profilringe und Einrichtung zur Durchführung des Verfahrens A method of applying elastic sealing rings on profile rings, and means for carrying out the method |
| 07/16/2009 | DE102008003789A1 Vorrichtung zur Befestigung von Kunststoffgehäusen A device for securing plastic casings |
| 07/15/2009 | CN201271943Y Shaping mould for slight ceramic tube |
| 07/08/2009 | CN201268031Y Ceramic lining composite steel pipe non-nick fixing sleeve for centrifuge |
| 07/08/2009 | CN201268030Y Apparatus for producing plugging artificial rock core |
| 07/07/2009 | US7556491 Heating panel and method of heating |
| 07/02/2009 | WO2009079705A1 Method for lining a pipe or elbow |
| 07/02/2009 | WO2009060339A3 Flange for self-supporting rigid hollow body, method for making such a hollow body using such flanges, and equipment for implementing said method |
| 07/02/2009 | CA2706109A1 Method for lining a pipe elbow or bend |
| 06/24/2009 | CN101462304A Telescopic rotary frame for tubular core mould |
| 06/24/2009 | CN101462303A Synchronous forming device for tubular core mould |
| 06/24/2009 | CN101462302A Method for preparing concrete pipe material using metallurgy slag as principal raw material |
| 06/17/2009 | CN201257705Y Vacuum rotating cylinder apparatus |
| 06/17/2009 | CN201257704Y Spacing equipment and coordination structure thereof |
| 06/10/2009 | EP2067590A2 Composite pipe and method for its production |
| 06/10/2009 | DE102007058885A1 Verbundrohr und Verfahren zu dessen Herstellung Composite pipe, and method for its production |
| 06/09/2009 | CA2351919C Installation for hardening tubular concrete workpieces |
| 06/04/2009 | WO2009067749A1 Pipe coating |
| 06/04/2009 | CA2706917A1 Pipe coating |
| 06/03/2009 | CN201249485Y Close device of vertical vibration steel mould |
| 06/03/2009 | CN201249484Y Horizontal shot crete machine |
| 05/28/2009 | DE102007054129A1 Intake or drainage shaft for collecting impurities from through flowing effluent, has hollow space with wall area and floor area, in which inlet opening and outlet opening are introduced |
| 05/27/2009 | CN101439556A Inner mold for casting concrete nuclear waste bucket |
| 05/27/2009 | CN101439555A Pipeline preparation method for tunnel maintenance type tubular pile |
| 05/27/2009 | CN101439554A Production chain manufacturing method of tubular piles |
| 05/20/2009 | DE102007053714A1 Method for manufacturing clone of park bench with wooden appearance, involves designing and shaping base frame of construction from iron, and pasting individual sections with tile adhesive |
| 05/20/2009 | CN101435250A Prefabricated common concrete pipe restricted type regeneration concrete core composite column and manufacturing method thereof |