| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
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| 10/05/2005 | CN1678437A Moulding insert for moulding machines |
| 09/28/2005 | EP1578574A1 Moulding of concrete articles |
| 09/28/2005 | CN2728751Y Isostatic pressure mould |
| 09/28/2005 | CN1220574C Mfg. method of automatic molding cement tube with thin wall |
| 09/14/2005 | CN2724968Y Cement vinylon pipe automatic shaping equipment |
| 09/08/2005 | DE102004007762A1 Concrete pipes for transporting aggressive materials have end rings made from polymer concrete and internal polymer concrete lining |
| 09/01/2005 | US20050188645 Inserts and method and apparatus for embedding inserts in cast members |
| 09/01/2005 | US20050188526 Method and apparatus of manufacturing electric pole |
| 08/31/2005 | CN2721359Y Cement pile forming device |
| 08/17/2005 | EP1261467B1 Method and device for producing a straight cylindrical body by molding using a loose hardenable granular material and the utilization thereof for producing a tube |
| 08/03/2005 | CN2714657Y Toilet with separated main body and drainage pipe |
| 08/03/2005 | CN1649707A Vertical moulding of concrete |
| 08/03/2005 | CN1648506A Super large caliber centripetal stress high pressure water transport pipe and its preparing process |
| 08/03/2005 | CN1648505A Large caliber oblique stress high strength water transport pipe and its preparing process |
| 07/27/2005 | CN2712588Y Well-pipe frame used for pre-cast cement well pipe orifices |
| 07/27/2005 | CN2712587Y Bamboo ring shaped pre-stressed pipe pile steel mould |
| 07/27/2005 | CN2712586Y Thin-walled cement pipe forming equipment |
| 07/21/2005 | US20050156345 Vertical moulding of concrete |
| 06/30/2005 | DE10392413T5 Verfahren und Vorrichtung zur Herstellung eines Elektromasts Method and apparatus for manufacturing an electric pylon |
| 06/29/2005 | CN1631635A Method for preparing agriculture anti-freezing composite pipe |
| 06/28/2005 | US6911168 Method and device for producing a straight cylindrical body by molding using a loose hardenable granular material and the utilization thereof for producing a tube |
| 06/15/2005 | CN1206089C Technological method of producing pretensioning prostressed concrete pipe pole using silica and portland cement |
| 06/14/2005 | US6905644 Process and device for producing components and semifinished products from synthetic graphite or ceramic granules, in particular for producing graphite tubes |
| 06/08/2005 | EP1536933A2 Moulding insert for moulding machines |
| 06/08/2005 | CN2703633Y Composite-tube formation production apparatus |
| 06/08/2005 | CN1205008C Stripping device for extruded blank |
| 06/02/2005 | WO2005049522A1 Geopolymer concrete and method of preparation and casting |
| 06/02/2005 | US20050118297 construction element formed with a durable concrete crust having an external surface with a relatively high compressive strength, said crust enveloping a core made of aggregate material indexed in inverted segregation dispersion |
| 06/02/2005 | CA2545407A1 Geopolymer concrete and method of preparation and casting |
| 06/01/2005 | EP1534482A1 Method and apparatus for fabricating a hollow-core concrete product |
| 05/18/2005 | CN1201913C Composite silicon sand portland cement and its application method in production of pipe pile |
| 05/12/2005 | US20050098705 Method and facility for the automatic production of hollow bodies from mixed material |
| 05/06/2005 | WO2005039846A1 Pipes |
| 04/27/2005 | EP1198437B1 Production of ceramic tubes with a radial orientation preference |
| 04/20/2005 | CN1197692C Method for preparing thin wall ceramic pipe and centrifugal formation machine |
| 04/19/2005 | CA2235107C Modular sleeve for protecting, repairing or renovating a pipe |
| 04/14/2005 | WO2005032784A1 A fibre reinforced cement column and method of forming the same |
| 04/14/2005 | WO2005032781A1 Vertical moulding of long concrete articles |
| 04/14/2005 | CA2541983A1 Vertical moulding of long concrete articles |
| 04/14/2005 | CA2541573A1 A fibre reinforced cement column and method of forming the same |
| 04/13/2005 | CN2691820Y Thin wall cement pipe shaping equipment rotary drum |
| 04/06/2005 | CN1603079A Method and equipment for producing entirety type hollow wallboard |
| 03/31/2005 | US20050070187 Form for containing settable filler material during setting |
| 03/31/2005 | DE10339546A1 Schalung für einen eine umlaufende Wandung aufweisenden Hohlkörper Formwork for a peripheral wall having a hollow body |
| 03/30/2005 | CN2688477Y Thin-wall cement pipe forming mould |
| 03/30/2005 | CN1600517A Composite type antibacterial water stable nano air conduit |
| 03/30/2005 | CA2443480A1 A form for containing settable filler material during setting |
| 03/24/2005 | DE10339154A1 Mold for the production of thin-wall fiber concrete pipes, as conduits for water supply pipes through walls, has an outer mold and an inner tapering core covered with a loose sleeve |
| 03/23/2005 | CN1597286A Method of manufacturing prestressed high strength concrete hollow square pile centrifugal, steam, maintenance method |
| 03/23/2005 | CN1597285A Production technology of through type ventilation pipeline and its mould |
| 03/17/2005 | WO2005023501A1 Improved mould for making cement posts particularly for use in laying out vineyard lines |
| 03/17/2005 | WO2004022294A3 Moulding insert for moulding machines |
| 03/17/2005 | US20050058740 Vibration system for concrete pipe making machines |
| 03/16/2005 | CN1593878A Cement thin-wall pipe and manufacturing method thereof |
| 03/03/2005 | DE102004016609B3 Supply unit for fluids and solids in a rotating mould comprises a rod shaped member connected to a supply line at one end and a sleeve with holes in it which slides relative to the member |
| 03/02/2005 | EP1510313A2 Mould for a hollow body comprising a circular wall |
| 03/02/2005 | CN2681883Y Centrifugal riding wheel type ceramic lining composite steel pipe producing apparatus |
| 03/02/2005 | CN1586852A Pipe making method for suspension roller type spigot and socket muoth steel bar concrete pipe |
| 02/16/2005 | CN1189297C Construction method of in-situ concrete prestressed round pipe joint-seam water pvessure checking |
| 02/02/2005 | CN1187174C Large-aperture prestressed concrete pipe and its preparation process |
| 01/26/2005 | EP1499483A1 Vertical moulding of concrete |
| 01/26/2005 | CN2673609Y Polymer cement steel wire net light thin wall pipe |
| 01/26/2005 | CN2673608Y Duplex position cast tube cement lining coating machine |
| 01/26/2005 | CN2673512Y Ceramic lining composite nozzle |
| 01/26/2005 | CN1569427A Novel circulating use method for residual grout of PHC pipe pile |
| 01/26/2005 | CN1186552C Water supplying and draining pipes and production thereof |
| 01/26/2005 | CN1186182C Technological process for producing pipe pile by using ground metallurgical slag and ground silicon sand infiltration method |
| 01/26/2005 | CN1186179C Hollow ceramic rod and manufacturing process thereof, and its application for producing light refractory materials |
| 01/19/2005 | CN2671778Y Pipe making mold |
| 01/18/2005 | US6843761 Paper feed roller and method of manufacture |
| 01/12/2005 | EP1494839A1 Method for manufacturing a shaft bottom part with lateral exits |
| 01/12/2005 | CN1563601A Concrete pipe pile mixed by steel fiber and fabricating method |
| 01/06/2005 | WO2005000549A1 Bottom ring for a mould for casting a concrete pipe with partially embedded rubber strip |
| 01/06/2005 | US20050000621 Method of making laminate thin-wall ceramic tubes and said tubes with electrodes, particularly for solid oxide fuel cells |
| 01/05/2005 | CN2668364Y Broken-shaft centrifugal machine |
| 01/05/2005 | CN1560380A Structure of precast rainforced concrete tubular pile and manufacture method thereof |
| 12/29/2004 | EP1490556A1 Molded concrete foundation element and method for its manufacture |
| 12/23/2004 | US20040255545 Method of reinforcing a cylindrical pipeline and prefabricated plate used in such method |
| 12/22/2004 | CN2664877Y T triangle front axle bracket hydraulic self-centring cement tube machine |
| 12/22/2004 | CN2664876Y Cement concrete seamless tube steel mould |
| 12/22/2004 | CN1556293A End cover unreleased thin wall pipe for field pouring concrete hollow floor production method and equipment |
| 12/02/2004 | WO2004103662A1 Method for the production of containers and tubes with completely sealed walls |
| 12/02/2004 | US20040238982 Method for producing glass-like carbon pipe, and glass-like carbon pipe produced by such method |
| 12/02/2004 | US20040237848 Method and device for the production of a multi-layer concrete pipe |
| 12/01/2004 | EP1480801A1 Method for producing a manhole element, particularly a manhole ring, upper sleeve for producing a manhole element, and a manhole element |
| 12/01/2004 | CN1551819A Building member, method and apparatus for manufacturing said building member |
| 11/24/2004 | CN1548281A Efficient antiseptic ventilation pipe |
| 11/18/2004 | US20040227274 Device and method for the production of a multi-layer concrete pipe |
| 11/17/2004 | CN1175967C Tool for shaping hollow tube with ribs being reinforced |
| 11/10/2004 | CN1174844C Production method of rib stiffener hollow thin-wall pipe for reinforced concrete |
| 11/03/2004 | EP1473129A2 Method and apparatus for producing multilayered concrete pipes |
| 11/03/2004 | EP1473128A2 Method and apparatus for producing multilayered concrete pipes |
| 11/03/2004 | CN1541778A Manufacturing method of composite nozzle with ceramic lining |
| 10/27/2004 | CN1540893A Data structure providing storage and bandwith savings for hardware RTCP statistics collection appliances |
| 10/27/2004 | CN1173419C Shaped body consisting of textured superconductor material and method for producing same |
| 10/20/2004 | CN1171711C Installation for producing pipes by centrifugal casting |
| 10/20/2004 | CN1171708C Method for making hollow reinforced tube, speical mould |
| 10/14/2004 | US20040201118 Method and apparatus for casting a concrete product |
| 10/13/2004 | EP1466713A2 Concrete pipe manufacturing machinery and methods |
| 10/13/2004 | CN2647544Y Equipment for producing thin wall pipe used for cast-in-place concrete hollow floor slab |