| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
|---|
| 06/03/1998 | CN1183531A Method for mfg,. chimney pipe and fire box |
| 05/18/1998 | CA2219465A1 Equipment and process for producing ceramic tubes |
| 05/06/1998 | CA2197630A1 Collapsible core for concrete pipe making apparatus |
| 04/08/1998 | EP0833697A1 Pipe coating apparatus |
| 04/08/1998 | CN1178160A Production of soft thermal insulating pipe shell |
| 04/01/1998 | EP0788422A4 Placing filaments within extruded hydraulically settable compositions |
| 04/01/1998 | EP0678068A4 Highly inorganically filled compositions. |
| 04/01/1998 | EP0662029A4 Hydraulically settable containers. |
| 03/25/1998 | CN2276877Y Concrete applicator for underground pipeline |
| 03/24/1998 | US5730034 Automatic bolt driving apparatus for driving bolts to secure elongated concrete molding frame segments |
| 03/11/1998 | CN2275937Y Pipe mould |
| 02/24/1998 | US5720993 Collapsible core for concrete pipe making apparatus |
| 02/18/1998 | CN2274567Y Concrete pipe making apparatus |
| 02/03/1998 | US5714080 Self-actuating molds for vertically casting concrete pipe |
| 01/06/1998 | US5705237 Porous cement, disposable products, cups, plates, boxes |
| 01/02/1998 | DE19608534C1 Shuttering for steel reinforced concrete column or support |
| 12/24/1997 | WO1997048535A1 Pipe coating apparatus |
| 12/24/1997 | CN1168312A Manufacturing method of composite pipe with ceramic lining |
| 12/10/1997 | CN2269944Y Prestress concrete well pipe |
| 12/02/1997 | US5693274 Manufacturing method of prefrom for composite material of automobile |
| 11/25/1997 | CA2099833C Highly polishable, highly thermally conductive silicon carbide, method of preparation, and applications thereof |
| 11/19/1997 | CN2267916Y Improved rotatable-extrusion forming device for concrete tube |
| 11/04/1997 | CA2130733C Vibrators |
| 10/29/1997 | CN2265881Y Front-end holding supporting concrete pipe making machine |
| 10/21/1997 | US5679279 Collapsible core seam cover for concrete making apparatus |
| 10/15/1997 | CN2264643Y Suspension rolling machine |
| 10/15/1997 | CN1036163C Process for producing tubular molded parts made of hightemp. super-conductor material and also plant thereof |
| 10/14/1997 | US5676905 Methods for manufacturing articles of manufacture from hydraulically settable mixtures |
| 09/30/1997 | CA2103437C Concrete pipe fabrication |
| 08/20/1997 | CN1157589A Method and device for producing pipes or tubular moulded bodies from polymer concrete |
| 08/13/1997 | EP0788422A1 Placing filaments within extruded hydraulically settable compositions |
| 07/15/1997 | US5648108 Production system for automatic casting of hollow bodies, in particular of concrete |
| 06/26/1997 | WO1997022451A1 Process and device for making a pipe |
| 06/25/1997 | EP0780204A1 Process and apparatus for making moulded sleeve pipes and moulded sleeve pipes produced by said process |
| 06/25/1997 | EP0779855A2 Method and device for producing pipes or tubular moulded bodies from polymer concrete |
| 06/25/1997 | CN2256804Y Extruder for column-shaped non-armoured concrete culvert pipes |
| 06/12/1997 | WO1997020668A1 Improved process and equipment for lining concrete pipes |
| 05/07/1997 | EP0771627A1 Method and device for the manufacturing of an oblong object from a curable material |
| 05/06/1997 | US5626954 Sheets made from moldable hydraulically settable materials |
| 04/24/1997 | WO1997014909A1 Modular sleeve for protecting, repairing or renovating a pipe |
| 04/24/1997 | WO1997014544A1 A collapsible core |
| 04/17/1997 | DE19538113A1 Prefabricated pin and socket concrete pipe abutment cushion |
| 04/16/1997 | CN1147451A Continuous plastering process for mortar lining of small-bore pipe |
| 04/16/1997 | CN1147440A Production process of curved prefabricated concrete product with soft mould |
| 04/09/1997 | CN1147045A Improvements in vibrators and machines equipped therewith |
| 04/02/1997 | CN2250852Y Combining inserting vibration shaper for heavy calibre cement pipe |
| 04/01/1997 | US5616351 Compaction head of a production machine for reinforced concrete pipes |
| 03/26/1997 | EP0634959B1 Process and device for the continuous production of cylindrical rods with at least one internal helical channel, and sinter blank made by this process |
| 03/25/1997 | US5615291 Capillary for optical fiber connectors and method of manufacturing the same |
| 03/25/1997 | US5614307 Sheets made from moldable hydraulically settable compositions |
| 03/05/1997 | CN1034193C Compound tube and making method thereof |
| 02/19/1997 | CN1143136A External square, internal circular hollow prestress steel rod concrete static press pile |
| 02/12/1997 | CN1142432A Apparatus for manufacturing long pipe by centrifugal casting process |
| 02/05/1997 | CN2246575Y Flexible pipe pile steel mould without packing |
| 01/29/1997 | EP0755760A2 Apparatus for making manholes |
| 01/09/1997 | WO1997000733A1 Pipe coating apparatus |
| 12/11/1996 | CN1137438A Telescopic reinforced concrete electric rod forming die |
| 11/28/1996 | DE19518770A1 Unit for manufacturing concrete pipes |
| 10/09/1996 | CN1132680A Prodn process and equipment for high-pure ceramic membranous canal |
| 10/03/1996 | WO1996030178A1 A system for the moulding of tubular goods |
| 09/26/1996 | DE19510562A1 Concrete compaction vibrator |
| 08/21/1996 | CN1129202A Production methbod for light-weight cement product |
| 07/24/1996 | CN1127186A Fine stone concrete pipe and making method |
| 07/18/1996 | WO1996007531A3 Method and device for producing pipes or tubular moulded bodies from polymer concrete |
| 07/17/1996 | EP0722104A1 Capillary for optical fiber connectors and method of manufacturing the same |
| 07/10/1996 | CN1126233A Highly inorganically filled compositions, articles of manufacture made from highly inorganically filled compositions and methods for making same |
| 07/09/1996 | US5533885 Apparatus for manufacturing annular or tubular workpieces from concrete |
| 06/26/1996 | CN2229870Y Prefabricated concrete member for protective well chember of water pumping cylinder of low pressure gas |
| 06/20/1996 | DE4443270A1 Mfg. parts for chimney flues etc. |
| 06/20/1996 | DE19504458C1 Ceramic or metal powder pressing appts. |
| 06/18/1996 | CA2107255C Pipe wrapping apparatus and method |
| 06/12/1996 | EP0716260A2 A pipe joint |
| 05/07/1996 | US5514430 Coated hydraulically settable containers and other articles for storing, dispensing, and packaging food and beverages |
| 05/02/1996 | DE4438664A1 Mfr. of moulded or cast articles esp. made of concrete |
| 04/25/1996 | DE4437518A1 Process for producing precast concrete components eg. manhole ring |
| 04/11/1996 | WO1996010477A1 Placing filaments within extruded hydraulically settable compositions |
| 04/11/1996 | CA2201605A1 Placing filaments within extruded hydraulically settable compositions |
| 03/21/1996 | DE4443554C1 Refractory ceramic component |
| 03/14/1996 | WO1996007531A2 Method and device for producing pipes or tubular moulded bodies from polymer concrete |
| 03/14/1996 | DE4432333A1 Verfahren und Vorrichtung zur Herstellung von Formkörpern aus Polymerbeton Method and apparatus for production of shaped bodies made of polymer concrete |
| 03/14/1996 | CA2199602A1 Method and device for producing pipes or tubular moulded bodies from polymer concrete |
| 03/13/1996 | EP0700763A2 Complementary adjusting ring used with mould pallets for modifying the thickness of the moulded articles |
| 03/13/1996 | CN2222048Y Stripping device for sand-adding pipe |
| 03/13/1996 | CN1031259C Manufacture of pumice cheminey |
| 02/28/1996 | CN1117757A A sealing device a mould element and a pipe |
| 02/21/1996 | CN2220350Y Pipe making machine for cement cable pipe |
| 02/20/1996 | US5492659 Process for the production of concrete tiles |
| 02/14/1996 | EP0696701A1 A sealing ring device |
| 02/07/1996 | EP0695611A2 Process and device for making profiled tubular pressed articles from a material in a plastic state such as clay or similar |
| 01/17/1996 | CN2217495Y Thread-connected prestressed steel reinforced concrete well tube |
| 01/17/1996 | CN2217494Y Vertical concrete-extruding tuber by one-time pressing on bell socket |
| 01/10/1996 | CN2216900Y Suspension roller die tool for prodn. of tubes |
| 01/04/1996 | DE4423327A1 Manufacturing process for mouldings esp. chimney liners |
| 01/03/1996 | EP0689917A2 Packerhead for a reinforced concrete pipe making machine |
| 01/02/1996 | CA2074475C A method and apparatus for coating the outer surface of an elongated body with a layer of concrete |
| 12/13/1995 | EP0686245A1 A sealing device, a mould element and a pipe |
| 12/13/1995 | CN1113303A Porous ceramic lining-tube and its production method |
| 12/13/1995 | CN1113280A A drain material and a process for producing the same |
| 12/12/1995 | US5474613 Chemical vapor deposition furnace and furnace apparatus |
| 11/08/1995 | CN2211899Y Diameter changing inner mould for forming large diameter steel reinforced concrete pipe |