| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
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| 10/18/2006 | CN1280076C Efficient antiseptic ventilation pipe |
| 10/12/2006 | DE10053008B4 Verfahren und Vorrichtung zur Herstellung stahlbetonummantelter Vortriebsrohre Method and apparatus for producing reinforced concrete jacking pipes coated |
| 10/10/2006 | US7118789 Silica glass crucible |
| 10/04/2006 | CN1842405A Method and apparatus for extruding a ceramic material |
| 09/27/2006 | EP1705680A1 Apparatus, method for molding a ceramic discharge vessel and removing the core, and the core |
| 09/19/2006 | US7108821 Method for making double-wall shells by centrifuging |
| 09/19/2006 | US7108101 Manhole insert for manufacture of a cast member and to provide a step insert having increased structural and holding strength |
| 09/13/2006 | CN2815655Y Small pipe diameter single-layer thermal-insulated counterweight coating support device |
| 09/13/2006 | CN1830645A Roinforced bar concrete structure precasting method |
| 08/30/2006 | CN2810954Y External pressing type quasi-isostatic pressing device for product formed by cylindrical mold |
| 08/30/2006 | CN2810953Y Internal pressing type quasi-isostatic pressing device for product formed by cylindrical mold |
| 08/30/2006 | CN2810952Y Automatic forming die and device for artistic cement guard post |
| 08/23/2006 | CN2808506Y Pipe pile joint button |
| 08/23/2006 | CN2808505Y Cement bar centrifugal polishing device |
| 08/23/2006 | CN1820922A Process for producing hollow slab seal end thin wall tube |
| 08/16/2006 | EP1689691A1 Geopolymer concrete and method of preparation and casting |
| 08/16/2006 | CN2806107Y Inspection well body mechanical production device |
| 08/16/2006 | CN1817599A Secondary tubular pile tensioning process by prestress and special tensioner |
| 08/09/2006 | CN2803672Y Shaping mould for cement thin wall pipe |
| 08/09/2006 | CN2803671Y Auto shaping and filling appts for cement thin wall pipe |
| 08/09/2006 | CN2803670Y Auto shaping appts for processing cement thin wall pipe |
| 08/09/2006 | CN2803669Y Auto shaping centrifugal appts for cement thin-wall pipe |
| 08/01/2006 | US7083406 Vibration system for concrete pipe making machines |
| 07/28/2006 | CA2534177A1 Transparent construction form |
| 07/26/2006 | CN1807051A Reinforced concrete resin slurry casting pipe and method for manufacturing the same |
| 07/19/2006 | EP1433581A4 Building structure, method and device for producing said building structure |
| 07/13/2006 | US20060154008 Glass tube, method of manufacturing the glass tube, and method of adhering the glass tube |
| 07/12/2006 | CN1799802A High-bearing capacity prestressed tubular pile and its production method |
| 07/05/2006 | EP1676644A2 Vibrating device |
| 07/05/2006 | EP1675712A1 A fibre reinforced cement column and method of forming the same |
| 06/29/2006 | US20060138688 Moulding of concrete articles |
| 06/28/2006 | EP1499483A4 Vertical moulding of concrete |
| 06/21/2006 | EP1670624A1 Vertical moulding of long concrete articles |
| 06/14/2006 | CN1785638A Preparation method of small diameter thin wall cement sewage discharge pipe |
| 06/14/2006 | CN1785637A Shaping machine of vertical cement tube |
| 06/08/2006 | US20060121149 Apparatus and method for removing objects from forming means |
| 06/08/2006 | US20060121147 Jig used in forming cover layer of small form factor optical disk and method of forming cover layer in small form factor optical disk using the same |
| 06/07/2006 | CN2785827Y Formed paper mould for concrete column |
| 05/25/2006 | US20060110485 Device for briquetting |
| 05/24/2006 | EP1658164A2 Method and apparatus for extruding a ceramic material |
| 05/24/2006 | DE102005036705A1 Prestressed concrete pipe manufacturing method, involves hydraulically, mechanically or pneumatically expanding and/or shortening internal and/or external frameworks in radial direction to prestress shielding |
| 05/17/2006 | CN2780438Y Steel mould for concrete round tube |
| 05/10/2006 | CN2778523Y Spiral rib prestressed steel rod with screw threads on two ends |
| 04/27/2006 | US20060088622 Device and mold for rotational molding of plastic materials |
| 04/20/2006 | US20060083806 Method and apparatus for continuous molding of fiber reinforced plastic member with curvature |
| 04/12/2006 | CN1250382C Method of mfg. molded body |
| 04/06/2006 | US20060073230 Sheet material pressing machines |
| 03/28/2006 | US7018577 Panel liner and method of making same |
| 03/23/2006 | DE102004037395A1 Chemically-resistant concrete or mortar composition, contains water-based epoxy polymer precursor- and hardener emulsion, with microsilica |
| 03/22/2006 | EP1637787A2 Corrugated tube with outer protection layer |
| 03/15/2006 | CN1746434A Centrifugal tubular pile with concrete of thin-wall steel pipe and production thereof |
| 03/09/2006 | DE202005019743U1 Inner surface smoothing device for tubular construction unit, has rotation unit aligned rotatably around its center axis, and smoothing unit for building material such as concrete or mortar is arranged at outside region of barrel surface |
| 03/08/2006 | CN1743731A Method for manufacturing stainless steel flue pipe for coal-fired stove |
| 03/01/2006 | CN1244122C Method of producing light emitting tube |
| 02/22/2006 | EP1626848A1 Bottom ring for a mould for casting a concrete pipe with partially embedded rubber strip |
| 02/16/2006 | US20060034963 Apparatus for cutting expanded graphite sheet material |
| 02/16/2006 | US20060033227 Method and an apparatus for the manufacture of concrete pipes |
| 02/14/2006 | US6997429 Exterior mold |
| 02/01/2006 | CN1727164A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727163A Cylindrical die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727162A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727161A Cylindrical die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727160A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727159A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727158A Trough shape die for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727157A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727156A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727155A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727154A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727153A Cylindrical die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727152A Die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727151A Die in user for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727150A Cylindrical die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727149A Cylindrical die in use for molding component of concrete filled double thin wall |
| 02/01/2006 | CN1727148A Forming die for component in polyhedron |
| 01/25/2006 | CN2753557Y Concrete hollow square pile centrifugal forming mould |
| 01/18/2006 | CN2752013Y Cast-in-place hollow beamless concrete slab hollow tube production mould |
| 01/11/2006 | CN1718405A Manufacturing method of precasting hollow thin shell column and its device |
| 01/10/2006 | US6984118 Method and apparatus for the production of tubes from concrete mix |
| 01/05/2006 | WO2006001742A1 Device for mounting a sealing ring, adapted to be partially embedded in a concrete pipe, on a bottom ring of a casting mould |
| 12/28/2005 | CN1713970A Moulding of concrete articles |
| 12/13/2005 | US6974516 Method of making laminate thin-wall ceramic tubes and said tubes with electrodes, particularly for solid oxide fuel cells |
| 12/08/2005 | US20050269747 Press head assembly for concrete pipe making machine |
| 12/07/2005 | CN1704221A Hollow tube forming tool |
| 12/07/2005 | CN1704220A Die shell component forming dies |
| 12/07/2005 | CN1704219A Die shell component forming dies |
| 12/07/2005 | CN1704218A Die shell component forming dies |
| 12/04/2005 | CA2508737A1 Press head assembly for concrete pipe making machine |
| 11/10/2005 | WO2005105403A1 Delivering element and associated device |
| 11/02/2005 | EP1590142A1 A method and an apparatus for the manufacture of concrete pipes |
| 10/27/2005 | US20050238751 Moulding insert for moulding machines |
| 10/27/2005 | DE10339546B4 Schalung für einen eine umlaufende Wandung aufweisenden Hohlkörper Formwork for a peripheral wall having a hollow body |
| 10/27/2005 | DE102004017964A1 External chimney manufacturing method for house, involves applying primarily colored paint on outer side of ceramic pipe during two-layer spraying operation, and drying painted ceramic pipe at room temperature |
| 10/19/2005 | CN2734451Y Centrifugal square pile mold |
| 10/19/2005 | CN1683133A Method for producing artificial prefabricated concrete pipe in different speciication and shape and mould |
| 10/13/2005 | WO2005095095A1 A pipe forming assembly |
| 10/13/2005 | WO2005094495A2 Heating panel |
| 10/06/2005 | US20050220924 Heating panel |
| 10/05/2005 | CN2730602Y Prestressing force steel bar anchoring device for prestressing reinforced concrete pipe |
| 10/05/2005 | CN2730601Y Suspension roller type socket reinforced concrete pipe making machine |