| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
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| 05/26/2010 | CN101041964B Method for producing pretensioned prestressing concrete shape tube pile |
| 05/19/2010 | CN201473205U Large-tonnage concrete segment turning machine in tunnel |
| 05/19/2010 | CN201471593U Energy-saving device for high-pressure curing of tubular pile |
| 05/19/2010 | CN201471592U Centrifuge moulding mould for concrete square pole |
| 05/19/2010 | CN201471591U Quick middle joint device of centrifugal square pile |
| 05/19/2010 | CN201471590U Material feeding device of mould-pipe cement lining coating machine |
| 05/19/2010 | CN201471589U Residual sludge recycling device of centrifugal concrete pile |
| 05/19/2010 | CN201471588U Flue gas channel shock casting machine |
| 05/19/2010 | CN101708631A Track-tracking concrete segment die |
| 05/19/2010 | CN101708630A Internal pressure isostatic pressing method and mould of porous ceramic tube |
| 05/19/2010 | CN101021099B Plastic wooden tent pole producing method |
| 05/13/2010 | US20100119642 Resin molding device |
| 05/12/2010 | DE202010000169U1 Gussteil mit planparallelen Flächen und Vorrichtung zu dessen Herstellung Casting with plane and apparatus for the production thereof |
| 05/12/2010 | CN201456227U Sand screen mold core towing device |
| 05/12/2010 | CN201456226U Subway segment stray current protection combined sealing structure |
| 05/12/2010 | CN201456225U Prestressing-force tubular pipe tensioning nut locking mechanism of hand-operated gear |
| 05/12/2010 | CN201456224U Concentricity regulating frame of centrifugal casting machine of ceramic composite steel tube |
| 05/12/2010 | CN201456223U Subway segment double-station vibration casting mechanism |
| 05/06/2010 | US20100113169 Mold for manufacturing composite drive shaft and composite drive shaft manufactured using the mold |
| 05/06/2010 | US20100112117 Reusable infusion bag |
| 05/05/2010 | CN1704221B Hollow tube forming tool |
| 05/05/2010 | CN1704218B Die shell component forming dies |
| 05/05/2010 | CN101700677A Rapid curing process and device of centrifugal ductile cast iron pipe cement lining |
| 04/22/2010 | US20100096764 Gas Environment for Imprint Lithography |
| 04/22/2010 | US20100095467 Scraping tool |
| 04/21/2010 | CN201439217U Full-automatic steam cycle maintenance system of centrifugal concrete pile |
| 04/21/2010 | CN201439216U Centrifugal concrete pile assembly-disassembly mold pneumatic pick frame |
| 04/21/2010 | CN201439215U Centrifugal concrete pile mould lifting lug |
| 04/21/2010 | CN201439214U Pipe-pile grout-stopping anchor plate |
| 04/21/2010 | CN201439213U Long-mould manufacturing device for centrifugal concrete pile |
| 04/21/2010 | CN101053977B Core mould vibrating bar for core mould vibrating machine |
| 04/15/2010 | WO2010041995A1 Method of making hollow concrete elements |
| 04/14/2010 | CN201437257U Fast middle piecing device for tubular pile |
| 04/14/2010 | CN101694119A Reinforced concrete hollow purlin and production method thereof |
| 04/07/2010 | CN101691752A Construction method for connecting part of PHC tubular piles |
| 04/06/2010 | US7690911 Automated controlled atmospheric pressurized resin infusion apparatus and system |
| 04/01/2010 | US20100079855 Multi-clad optical fibers |
| 03/31/2010 | CN201432364Y Steam waste heat utilization device for tubular pile maintenance |
| 03/31/2010 | CN201432363Y Locking device of prestressed concrete hollow pile mould |
| 03/30/2010 | US7687431 Nanotube-shaped titania and process for producing the same |
| 03/17/2010 | CN201423712Y Pipe mold for pre-stressed steel cylinder |
| 03/17/2010 | CN201423711Y Vertical vibrating shaping mold for Phi-1000mm prestressed concrete cylinder pipes |
| 03/17/2010 | CN201423710Y Vertical vibrating shaping mold for Phi-1200mm prestressed concrete cylinder pipes |
| 03/17/2010 | CN101672035A High-strength prestressed concrete pipe-styled pile blended with ground river sands and production method thereof |
| 03/17/2010 | CN101670617A Segment overturning platform |
| 03/16/2010 | US7678324 Method for forming a hollow plastic product |
| 03/16/2010 | US7678322 Method of producing manufactured aggregates |
| 03/11/2010 | WO2009072112A3 Dishwashable bottle |
| 03/10/2010 | CN101664961A Manufacturing technique of reinforced concrete drain pipe |
| 03/09/2010 | US7674418 Method and apparatus for forming a hollow FRP article by internal pressure molding |
| 03/04/2010 | DE10314722C5 Vorrichtung und Verfahren zur Herstellung von mehrschichtigen Betonrohren Apparatus and method for producing multi-layer concrete pipe |
| 03/04/2010 | CA2735323A1 Composite tubular product |
| 02/25/2010 | US20100044908 Process for producing mixture of two-liquid mixing type curable resin and process for producing hollow-fiber membrane filter element |
| 02/24/2010 | CN201411690Y Prestressed concrete hollow square pile and shaping die thereof |
| 02/24/2010 | CN201410705Y Furnace core forming machine |
| 02/23/2010 | US7666488 Honeycomb structure and method of manufacturing the same |
| 02/18/2010 | US20100040722 Bulk Resin Infusion System Apparatus and Method |
| 02/18/2010 | US20100038822 Fracture Toughness Of Medical Devices With A Stereocomplex Nucleating Agent |
| 02/18/2010 | DE102008029167B4 Vorrichtung zur kontinuierlichen Herstellung von Umhüllungen für langgestrecktes Gut und Umlenkbehälter zur Verwendung in dieser Apparatus for the continuous production of coatings for elongated product and divert for use in this |
| 02/17/2010 | CN201405445Y Tubular pile curing and steam curing device |
| 02/17/2010 | CN201404902Y Novel supporting wheel |
| 02/16/2010 | US7662739 Containing alkali, or alkali earth metal on cordierite catalyst support; aggregate phases dispersed in the cordierite binder phase; for purification of nitrogen oxides and the like |
| 02/16/2010 | CA2475649C Vibration system for concrete pipe making machines |
| 02/11/2010 | US20100032663 Method and apparatus for simultaneous lateral and vertical patterning of molecular organic films |
| 02/10/2010 | CN101642932A Production process of short tubular piles |
| 02/03/2010 | CN201394890Y Special extended protection cap of centrifugal machine for producing ceramic-lined composite oil pipe |
| 01/27/2010 | CN101633209A Preparation method of rainwater pipe |
| 01/27/2010 | CN101633208A Cavity polyhedral filling and rapid processing method |
| 01/27/2010 | CN100585247C Ceramic composite pipe for conveying power plant flue gas desulfurization slurry |
| 01/27/2010 | CN100585106C Foam concrete wall for buildings construction |
| 01/21/2010 | US20100015273 Stretching apparatus for web of thermoplastic synthetic resin |
| 01/14/2010 | US20100007043 Multi-Tube Extrusion Apparatus and Method |
| 01/13/2010 | CN201380543Y Tension-cylinder suspended type tensioning machine |
| 01/13/2010 | CN201380542Y Centrifugal machine of ceramic-lined composite oil pipe |
| 01/13/2010 | CN100580302C Production process of energy conservation and heat preserving ventilating duct |
| 01/13/2010 | CN100579753C Method for preparing anti-crack and anti-seepage concrete pipes |
| 01/13/2010 | CN100579751C Demoulding method of 55mPHC tubular pile |
| 01/13/2010 | CN100579750C Shaping method of slight ceramic tube |
| 01/13/2010 | CN100579749C Prestressed concrete hollow pile production pile |
| 01/13/2010 | CN100579748C Production workshop for 55mPHC tubular pile |
| 01/07/2010 | US20100001425 Rapid rotational foam molding process |
| 01/07/2010 | US20100000667 Moulding tool and method of manufacturing a part |
| 01/06/2010 | CN101618573A Method for manufacturing prestressed strand steel cylinder concrete pipe |
| 01/06/2010 | CN101618572A Method for manufacturing prestressed strand concrete pipe |
| 12/31/2009 | US20090324768 Spannschiene Fur Eine Membrane Einer Membranpresse |
| 12/31/2009 | DE102008029167A1 Vorrichtung zur kontinuierlichen Herstellung von Umhüllungen für langgestrecktes Gut und Umlenkbehälter zur Verwendung in dieser Apparatus for the continuous production of coatings for elongated product and divert for use in this |
| 12/30/2009 | CN201371505Y Device for fabricating resin mortar transition layer of composite pipe |
| 12/30/2009 | CN101612761A Tube pile high-pressure curing energy-saving device and using method thereof |
| 12/30/2009 | CN101612760A Full automatic opening-closing mechanism for shield lining segment steel mould |
| 12/23/2009 | CN201366745Y Oblique rotating type tubular pile forming equipment |
| 12/23/2009 | CN100572018C Process for making concrete pile and its special-purpose equipment |
| 12/17/2009 | WO2009121581A3 Method for producing concrete prefinished parts |
| 12/17/2009 | US20090309262 Manufacturing apparatus and method for producing a preform |
| 12/10/2009 | US20090304835 Methods For Producing Superabsorbent Polymers For Use In Agricultural Applications |
| 12/10/2009 | DE19918972B4 Kernsegment für den Formkern einer Formeinrichtung zur Formgebung ringförmiger Betonteile Core segment for the form the core of a mold for forming annular concrete parts |
| 12/09/2009 | CN201357506Y One-way transmission device for moving duct piece moulds |
| 12/09/2009 | CN101596743A Magnetic self-suction vase post mold |
| 12/09/2009 | CN101596742A Smoke-air duct shocking casting machine |
| 12/08/2009 | CA2404395C Method of assembling a ceramic body |
| 12/02/2009 | CN201353831Y Transfer device for transferring segment mould and segment mould production system |