| Patents for B21K 21 - Making hollow articles not covered by any single one of groups (1,317) |
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| 06/25/1996 | US5529160 Clutch drum made of metallic plate and method of manufacturing same |
| 06/25/1996 | US5528829 Method of making a high strength automotive seat frame |
| 06/11/1996 | US5524464 Workpiece-bore processing apparatus and method |
| 06/06/1996 | WO1996016754A1 Method of necking an impact extruded metal container |
| 05/28/1996 | CA2126758C High strength automotive seat frame and method |
| 05/21/1996 | US5517844 Method for forming threadings in a bushing which is used to secure a hose therein |
| 05/21/1996 | US5517843 Method for making upset ends on metal pipe and resulting product |
| 05/02/1996 | WO1996012578A1 Process for heading pipe ends and device for implementing it |
| 05/02/1996 | DE4437395A1 Verfahren zum Anstauchen von Rohrenden und Vorrichtung zur Durchführung des Verfahrens Method for upsetting tube ends and device for carrying out the method |
| 04/30/1996 | US5511440 Method of manufacturing a hollow steering shaft and hollow steering shaft |
| 04/17/1996 | EP0707157A1 Propeller shaft and method for producing the same |
| 04/11/1996 | DE4435983A1 Servo cylinder, especially for hydraulic rack=and=pinion steering |
| 04/02/1996 | US5502994 Method for producing a metal tip |
| 03/13/1996 | EP0700323A1 Radial extrusion process combined with inside tube ironing |
| 03/06/1996 | CN1117896A Forming technology for hollow sucker rod and mould thereof |
| 02/08/1996 | WO1996003236A1 Method of manufacturing part having undercut |
| 01/18/1996 | DE4425073A1 Prodn. of inside profile of hollow body oriented w.r.t. external profile |
| 12/26/1995 | US5478280 Method of making a tubular body having a deformable internal skirt |
| 12/20/1995 | EP0687146A1 Metal mould for making a frozen confectionery product and a method for making the mould |
| 12/13/1995 | EP0594810B1 Bobbin body and process for producing the same |
| 12/05/1995 | US5471858 Apparatus and process for the production of a hollow workpiece being profiled in a straight or helical manner relative to the workpiece axis |
| 11/29/1995 | CN2213591Y Sprinkler head mould of three-hole oxygen spray gun |
| 11/07/1995 | US5463810 Method of manufacturing plunger barrel |
| 10/26/1995 | DE4414163A1 Hydrostatic servo steering for motor vehicles |
| 10/17/1995 | US5458032 Method for making a cold forged battery bushing |
| 09/28/1995 | DE19508798A1 Vehicle hydraulic steering rack mfr. |
| 09/21/1995 | WO1995025241A1 Method for making upset ends on metal pipe and resulting product |
| 08/31/1995 | DE4406407A1 Verfahren zur spanlosen Herstellung eines mechanischen Ventilstößels Method for cutting production of a mechanical valve lifter |
| 08/31/1995 | DE4403897A1 Method for hot pull-in of the ends of hollow workpieces by rolling |
| 08/10/1995 | WO1995021348A1 Connector device for one end of a rigid metal tube for transporting a fluid |
| 08/09/1995 | EP0666445A1 Connection device for a rigid metallic fluid conducting pipe end |
| 07/20/1995 | DE4400875A1 Method for reshaping tube end into profile |
| 06/28/1995 | EP0660003A1 Method of manufacturing the expanding sleeve of an expansion dowel |
| 06/25/1995 | CA2138311A1 Method for forming an expansion sleeve for an expansion dowel |
| 05/03/1995 | CN2195987Y Machine for making cartridge of air gun |
| 05/02/1995 | US5411521 Medical suturing device, a single-strike die mechanism, and a method of using said die mechanism for forming the medical suturing device |
| 03/15/1995 | EP0643249A2 Pressure hose fitting and its manufacturing process |
| 03/15/1995 | EP0643237A1 Manufacturing process for a machine support |
| 03/01/1995 | EP0640414A1 Method of manufacturing a hollow steering shaft and hollow steering shaft |
| 02/21/1995 | US5391113 Impact absorbing steering shaft comprising a press-worked hollow metal pipe |
| 02/14/1995 | US5388322 Method of making a shatterproof air bag inflator pressure vessel |
| 01/19/1995 | WO1994026437A3 Radial extrusion process combined with inside tube ironing |
| 01/10/1995 | US5379625 Method and apparatus for upsetting the ends of steel pipe |
| 01/03/1995 | US5377518 Method and apparatus for forming extruded metal tubes |
| 12/20/1994 | US5373720 Method of making battery terminal with necked flange |
| 12/14/1994 | EP0627997A1 High strength automotive seat frame and method |
| 12/07/1994 | EP0610509A4 Method for obtaining hollow forgings by radial forging of continuous blanks. |
| 11/24/1994 | WO1994026437A2 Radial extrusion process combined with inside tube ironing |
| 11/23/1994 | EP0625384A1 Method and apparatus for forming extruded metal tubes |
| 10/13/1994 | DE4408774A1 Centrally fired cartridges, especially blank cartridges, and a method for their production |
| 09/27/1994 | US5349840 Method of making a high torque battery terminal |
| 09/15/1994 | WO1994019962A1 Metal mould for making a frozen confectionery product and a method for making the mould |
| 09/15/1994 | CA2146570A1 Metal mould for making a frozen confectionery product and a method for making the mould |
| 08/17/1994 | EP0610509A1 Method for obtaining hollow forgings by radial forging of continuous blanks |
| 08/16/1994 | US5338100 High strength automotive seat frame and method |
| 07/28/1994 | DE4401674A1 Hot-forging perforation system |
| 06/21/1994 | US5321968 One piece tubing connector and method of forming same |
| 05/11/1994 | WO1994010731A1 Tubular metal housing for spark plugs, heater plugs and sensors |
| 05/05/1994 | DE4336706A1 Method of manufacturing piston bush with piston slide bore - involves bore for control sleeve and window section in wall of control sleeve bore |
| 05/05/1994 | DE4236656A1 Rohrförmiges Metallgehäuse für Zündkerzen, Glühkerzen und Sensoren A tubular metal housing for spark plugs, glow plugs and sensors |
| 05/04/1994 | EP0594810A1 Bobbin body and process for producing the same. |
| 05/04/1994 | CN1086162A Tubular metal housing for sparking plugs, glow plugs, and sensors |
| 04/26/1994 | US5305505 Process of making a multi-section bomb casing |
| 04/06/1994 | EP0590284A2 Battery terminal, cold forming-process and relating apparatus for manufacture said battery terminals |
| 03/30/1994 | EP0589598A1 Method of making a tubular body having a deformable internal skirt |
| 03/23/1994 | CA2105706A1 Method of making a tubular body having a deformable internal skirt |
| 03/22/1994 | US5296317 High torque battery terminal and method of making same |
| 02/03/1994 | DE4225368A1 Method for forming external toothing on hollow shafts - axial pressure forces are applied to material under section to be formed and produce multi-axial stress condition in workpiece |
| 02/03/1994 | DE4225367A1 Method for forming externally toothed hollow bodies - forming die is moved continuously into shaft and external toothing is cut simultaneously |
| 02/03/1994 | DE4225364A1 Method for forming toothed hollow shafts - boring pressure is simultaneously applied to blank from both ends, with forming dies acting as counter dies |
| 12/21/1993 | US5271262 Apparatus for forging a large caliber ring |
| 12/09/1993 | WO1993024256A1 Method for obtaining hollow forgings by radial forging of continuous blanks |
| 11/11/1993 | DE4214444A1 Mfg. spherical shells for homo-kinetic joints - by deforming sequentially and radially tubular or cup-shaped blank with shaping cross-sectional reduction |
| 11/09/1993 | US5259320 Intermediate article used to form a bullet projectile or component and a finally formed bullet |
| 11/04/1993 | DE4213226A1 Flat jet nozzle, esp. high pressure jet nozzle - has shaped recesses in wall of pocket bore, to generate part jets directed towards each other |
| 10/14/1993 | WO1993020003A1 Bobbin body and process for producing the same |
| 10/07/1993 | DE4211172A1 Spulenkörper und Verfahren zu dessen Herstellung Bobbin and process for its preparation |
| 10/06/1993 | EP0563549A2 A medical suturing device, and die mechanism forming it |
| 09/08/1993 | EP0558815A1 Device for producing a hollow workpiece, profiled, at least internally, in a straight or oblique direction with respect to the workpiece-axis, and its use |
| 09/02/1993 | WO1993016896A1 High strength automotive seat frame and method |
| 09/02/1993 | DE4206397A1 Method for stretch-reducing of steel rolling mill loops - is used in multi-stand mill, each succeeding stand moves at higher speed than previous one |
| 08/31/1993 | US5239751 Method of producing nozzle for solenoid valve |
| 07/27/1993 | US5230352 Medical suturing device, a single-strike die mechanism, and a method of using said die mechanism for forming the medical suturing device |
| 06/10/1993 | WO1993010924A1 Method of internally and externally upsetting the end of a metal tube |
| 06/08/1993 | US5216912 Steering shaft and manufacturing method therefor |
| 06/04/1993 | CA2079639A1 Method of internally and externally upsetting the end of a metal tube |
| 05/25/1993 | US5213250 Method for forming a lightweight flanged axle shaft |
| 05/18/1993 | CA2023655C Forging punch |
| 04/27/1993 | US5205464 Method for forming a lightweight flanged axle shaft |
| 04/20/1993 | US5203194 Method of forming a trailer hitch receiver tube |
| 04/15/1993 | DE4133340A1 Capacitor can with burst section - has cup shaped housing formed in press extrusion process with die having insert to form grooves for burst section |
| 03/31/1993 | EP0534818A1 Method of producing an axle with profiled ends, machine for carrying out the method and axles thus obtained |
| 03/18/1993 | DE4130557A1 Lenkwelle und verfahren zu deren herstellung Steering shaft and methods for their preparation |
| 02/09/1993 | US5184495 Method of internally and externally upsetting the end of a metal tube |
| 02/02/1993 | CA1313292C Process for manufacturing a tubular semifinished copper alloy part |
| 01/27/1993 | EP0524815A1 Apparatus for forging a large caliber ring |
| 01/12/1993 | US5177991 Method of and apparatus for coining tapers at opposite ends of a sleeve member |
| 10/22/1992 | DE4113273A1 Mfg. process for short tubular components with reducing cross=section - by cold rolling on mandrel in a reciprocating roll stand with advance and rotation of the tube |
| 10/14/1992 | EP0508096A1 Method of making an expanding dowel of metal |
| 09/16/1992 | CN1018241B Method for manufacturing piston rings |