| Patents for B21K 21 - Making hollow articles not covered by any single one of groups (1,317) |
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| 05/18/1999 | US5904060 Sheet metal member having a peripheral wall and method of thickening the peripheral wall thereof |
| 05/18/1999 | US5903967 Double cylinder body and a manufacturing method thereof |
| 05/06/1999 | DE19746840A1 Leakproof closure of a bore in a malleable aluminum alloy workpiece |
| 05/04/1999 | US5899105 Process for manufacturing a shaped metal can |
| 04/28/1999 | EP0910554A1 Bushing base with mounted nozzles |
| 04/20/1999 | US5894752 Method and system for warm or hot high-velocity die forging |
| 04/14/1999 | EP0869852A4 Rear drive m113 conversion method |
| 03/09/1999 | US5878494 Method for manufacturing a machine bearing |
| 03/03/1999 | CN1042305C Forming process for hollow sucker and and die thereof |
| 03/02/1999 | US5876525 Bobbin body and process for producing the same |
| 02/18/1999 | WO1999007497A1 Full enclosed die forging method, full enclosed die forging apparatus, and product of forging |
| 02/17/1999 | EP0800425B1 Method of manufacturing internally geared parts |
| 01/27/1999 | EP0892689A1 Process for increasing the wall thickness in hollow sections |
| 01/13/1999 | EP0889763A1 Variable-thickness extrusion method and extrusion unit in accordance with said method |
| 01/07/1999 | DE19829050A1 Manufacturing ring-shaped metallic parts with flat sections from round rod |
| 12/30/1998 | EP0887128A2 Method for manufacturing vacuum chamber |
| 12/09/1998 | EP0882640A2 Reinforcement for vehicle hollow structural member, having decreasing thickness end portions |
| 12/08/1998 | US5845394 Method of manufacturing a yoke for an elastic universal joint |
| 11/03/1998 | US5829911 Method for forming a high-tooth spline of a hollow shaft and hollow shaft having a high-tooth spline |
| 10/29/1998 | DE19717026A1 Extrusion equipment for hollow profiled metal work |
| 10/15/1998 | DE19714753A1 Shaping closed container base |
| 10/14/1998 | EP0869852A1 Rear drive m113 conversion method |
| 09/30/1998 | EP0867159A1 Artificial hip joint acetabular cup having two shells and its manufacture |
| 09/24/1998 | WO1998041339A1 Method for producing a brake cam shaft and a brake cam shaft produced according to said method |
| 09/24/1998 | DE19710848A1 Verfahren zur Herstellung einer Bremsnockenwelle sowie nach diesem Verfahren hergestellte Bremsnockenwelle A method of manufacturing a brake camshaft, and produced by this process brake camshaft |
| 09/17/1998 | DE19709947A1 Procedure for beading of edges of cylindrical components made of extruded aluminium |
| 09/15/1998 | US5806166 Connecting device for an end of a rigid metallic pipe for conveying a fluid |
| 08/19/1998 | EP0627997B1 High strength automotive seat frame and method |
| 08/11/1998 | US5791183 Apparatus and method for cold forming a ring on a lead alloy battery terminal including an anti-torque structure |
| 06/30/1998 | US5771737 Method for producing a propeller shaft |
| 06/16/1998 | US5765425 Radial extrusion process combined with inside tune ironing |
| 06/02/1998 | US5758977 Bush-like antifriction bearing element |
| 05/28/1998 | WO1998022239A1 Integral structure of sheet material and cylindrical member and production method thereof |
| 04/28/1998 | US5743301 Metal pipe having upset ends |
| 03/19/1998 | CA2215784A1 A load-bearing shaped part and a method for manufacturing shaped parts |
| 03/17/1998 | US5727295 Outside neck shaver |
| 03/12/1998 | WO1998009749A1 Method of fabricating shaft from metal plate |
| 03/10/1998 | US5724850 Rear fork for a motorcycle |
| 01/22/1998 | WO1998002387A1 Bushing base with mounted nozzles |
| 01/15/1998 | WO1998001246A1 Shaped article of sheet metal having peripheral wall and method of increasing peripheral wall thickness |
| 01/07/1998 | EP0815985A1 Method and apparatus for the hot-forming of tubular box-type elements of any shape made from a light alloy |
| 12/23/1997 | US5699689 Method of and apparatus for forming a disc-shaped blank |
| 12/10/1997 | EP0811444A1 Method of wall-thickening metal pipes |
| 12/03/1997 | CN2269253Y Cutting machine tool for heat-transfer tube |
| 11/20/1997 | DE19705279A1 Gear shaft forming to give reduced cavity diameters at shaft ends |
| 10/29/1997 | CN1163169A Wedge transverse rolling and vertical forging technology for forming rough forging of diesel engine oil sprayer |
| 10/23/1997 | WO1997038807A1 Process for increasing the wall thickness in hollow sections |
| 10/16/1997 | DE19614656A1 Manufacture of increased wall thickness on hollow profile, for IC engine exhaust pipe |
| 10/15/1997 | EP0800425A1 Method of manufacturing internally geared parts |
| 10/09/1997 | WO1997036701A1 Variable-thickness extrusion method and extrusion unit in accordance with said method |
| 08/28/1997 | DE19607310A1 Inner bearing forming method for bicycle wheel's crank |
| 08/21/1997 | WO1997029867A1 Manufacture of grease fittings and blanks therefor |
| 08/12/1997 | US5655400 Progressive die apparatus and method for making a lead alloy battery terminal |
| 08/06/1997 | EP0787914A1 Bush-shaped sliding element |
| 08/06/1997 | EP0787047A1 Process for heading pipe ends and device for implementing it |
| 07/31/1997 | DE19602360A1 Orifice for motor vehicle brake circuit pressure regulator |
| 07/22/1997 | US5650087 Metal mould for making a frozen confectionary product and a method for making the mould |
| 06/26/1997 | DE19645410A1 Method for manufacturing transverse rod for use with motor vehicle steering linkage |
| 06/19/1997 | DE19606754C1 Method for manufacturing tube blank for pinion shaft |
| 06/03/1997 | US5634674 Connecting device for an end of a rigid metallic pipe for conveying a fluid |
| 05/27/1997 | US5632173 Apparatus and method for cold forming a ring on a lead alloy battery terminal |
| 05/22/1997 | DE19647859A1 Method for forming multi=slot profile for quill shaft |
| 05/13/1997 | US5628222 Method of manufacturing a rack |
| 04/23/1997 | EP0687146B1 Metal mould for making a frozen confectionery product and a method for making the mould |
| 04/03/1997 | WO1997011799A1 A pressing and a method of and apparatus for making a pressing |
| 04/02/1997 | EP0756682A4 Method for making upset ends on metal pipe and resulting product |
| 04/01/1997 | US5615465 Process for manufacturing metal parts by free forging and drop forging in a press |
| 03/26/1997 | EP0764481A1 Device for forming a collared calibrated hole in plastically deformable walls |
| 03/18/1997 | US5611454 Extruded metal tubes |
| 03/04/1997 | US5606887 Apparatus and method for cold forming an L-shaped lead alloy battery terminal |
| 02/18/1997 | US5603882 Piercing method and apparatus |
| 02/12/1997 | EP0700323B1 Radial extrusion process combined with inside tube ironing |
| 02/05/1997 | EP0756682A1 Method for making upset ends on metal pipe and resulting product |
| 01/08/1997 | EP0752295A1 Method, punch-die tool and use thereof for the manufacture of cooking pots and pans |
| 01/08/1997 | CN1139600A All fibre forging method and die for water-cooling head of punching machine |
| 01/08/1997 | CN1139599A Making method and clamp tool for oil cylinder of shock absorber for motor vehicle |
| 01/02/1997 | EP0751036A1 Metallic tube element and backrest frame for motor vehicle seats provided with such element |
| 01/02/1997 | DE19625893A1 Disc-shaped blank making process |
| 01/02/1997 | DE19523280A1 Forging machine for internal shaping of tubular workpieces |
| 12/12/1996 | DE19607010C1 End-formation system on tubular metal workpiece |
| 12/10/1996 | US5582057 Method for forming an expansion sleeve for an expansion dowel |
| 11/12/1996 | US5572897 Method of obtaining hollow forgings by radial forging of solid blanks |
| 11/12/1996 | US5572893 Method of necking and impact extruded metal container |
| 11/05/1996 | US5570806 Method and apparatus for forming extruded metal tubes |
| 11/05/1996 | US5570508 Method of making a high strength automotive seat frame |
| 10/31/1996 | DE19515452A1 Chipless production method of internal tooth system for drive shaft |
| 10/23/1996 | EP0610509B1 Method for obtaining hollow forgings by radial forging of continuous blanks |
| 09/26/1996 | DE19504399C1 Aluminium rod for bridge framework construction |
| 09/25/1996 | EP0733414A1 Method of manufacture of a metal container in form |
| 09/24/1996 | US5557981 One-piece gearshift lever with cold formed end |
| 09/22/1996 | CA2172227A1 Method for making a metal box |
| 08/14/1996 | EP0726110A1 Method for hot-pressing balls, particularly for ball valves and the like, and ball produced thereby |
| 07/31/1996 | CN1127683A Method for making expanding sheath of expanding nail |
| 07/17/1996 | EP0721816A1 Method for the production of a hollow profile |
| 07/17/1996 | CN1126640A Method of manufacturing an automobile steering rack |
| 07/04/1996 | WO1996020050A1 Method of manufacturing internally geared parts |
| 07/04/1996 | DE4446919A1 Verfahren zur Herstellung von innenverzahnten Teilen A process for producing internally toothed parts |
| 07/04/1996 | CA2209121A1 Method of manufacturing internally geared parts |
| 07/04/1996 | CA2166443A1 Tubular housing, in particular for a fuel pump |
| 06/30/1996 | CA2163845A1 Method of forming a one-piece steering shaft member |