| Patents for B21K 21 - Making hollow articles not covered by any single one of groups (1,317) |
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| 10/10/2001 | EP1142739A1 Vehicle reinforcement for hollow structural member, having decreasing-thickness end portions |
| 10/04/2001 | WO2001072448A1 Method of manufacturing ball joint housing |
| 10/03/2001 | CN2451259Y Former for pipe end forming machine |
| 09/26/2001 | CN1314219A Method for forming a hollow cavity by using a thin substrate board |
| 09/25/2001 | US6293164 Rack and pinion steering apparatus and method for manufacturing a helical pinion |
| 09/20/2001 | WO2001068289A1 Method for producing configurated axisymmetric parts made of difficult-to-form multi-phase alloys and a device for carrying out said method |
| 09/13/2001 | US20010020498 Thin, forged magnesium alloy casing and method for producing same |
| 09/13/2001 | DE10040596C1 Device for cold press reshaping of pipe ends clamps a workpiece with a first hydrodynamically operated force transmission element while later reshaping it with a second hydrodynamically operated force transmission element. |
| 09/06/2001 | US20010018792 Method of forming a cavity structure with a thin bottom base plate |
| 08/29/2001 | EP1127952A1 Process for making hollow bodies for pressure containers from AlZnMgCu alloy |
| 08/16/2001 | WO2001058616A1 Method and a press cylinder device for producing a hollow body |
| 07/25/2001 | EP1117501A1 Process for manufacturing a captive screw |
| 07/25/2001 | CN1305402A Process for manufacturing captive screw |
| 07/19/2001 | US20010008156 Process for manufacturing pipes |
| 07/11/2001 | CN1068255C Method for making expanding sheath of expanding nail |
| 07/10/2001 | US6257041 Method of forming a one-piece steering shaft member |
| 06/21/2001 | DE19958343A1 Production of a hollow shaft having an outer contour with at least one wave section used in gears comprises processing the inner or outer diameter or at least a flange section of a bowl-like preform by pressure rolling |
| 06/20/2001 | EP1107845A1 Process for manufacturing pipes |
| 05/23/2001 | DE10056946A1 Endoscopic treatment instrument carrier element production process, involving making holding part by forging front part of cylindrical metal workpiece |
| 05/17/2001 | WO2001034324A1 Improved tool for removing damaged fasteners and method for making such tool |
| 05/17/2001 | DE19953525A1 Fabrication method for formed tubular part e.g. camshafts etc. uses conical forming mandrel with initial RPM 20% lower than component RPM |
| 05/17/2001 | CA2391276A1 Improved tool for removing damaged fasteners and method for making such tool |
| 05/09/2001 | EP1097012A1 Method for producing an inner profile or an outer profile by rotary kneading |
| 05/03/2001 | DE19951574A1 Fabrication process for shock absorber tube for motor vehicles uses massive forming process to produce jacket tube with gas-tight base |
| 05/02/2001 | EP0756682B1 Method for making upset ends on metal pipe and resulting product |
| 05/01/2001 | US6225591 Resistance welding electrode and process for making |
| 04/26/2001 | DE10052142A1 Production method for tubular metal casings for sparking plugs, involves cold forging using prepared dies and punching to produce tubular component with stepped tapered section |
| 04/24/2001 | US6221506 Bushing base with mounted nozzles |
| 04/11/2001 | EP1007235A4 Manufacture of grease fittings and blanks therefor |
| 04/05/2001 | WO2000047927A3 Apparatus for swaging an object |
| 04/05/2001 | DE19947311A1 Hollow screw or bolt for releasably fastening components together has head whose internal profile allows tool to be inserted to unscrew it and is produced from semi-finished sheet metal product or plastic |
| 03/29/2001 | WO2001021338A1 Making closed end tubes for surgical instruments |
| 03/29/2001 | CA2385585A1 Making closed end tubes for surgical instruments |
| 02/15/2001 | DE10020762A1 Fabrication process for hollow shafts for motor vehicle drive trains uses solid blank to cold-form end and neck sections with serration toothings, and apply low-friction coating |
| 02/08/2001 | DE19929639A1 Shaft for synchronised transmission systems has teeth at its ends to hold hub in place which are produced by mechanical shaping and have surface with inclination of at least 35 degrees to shaft axis |
| 02/01/2001 | WO2001007183A1 Sheet metal member and method of manufacturing the member |
| 01/23/2001 | US6176266 Housing block |
| 01/03/2001 | EP1065131A2 Rack and pinion steering apparatus and method for manufacturing a helical pinion |
| 12/13/2000 | EP1059128A1 Gas cylinder fabrication |
| 11/29/2000 | CN2407858Y Roll body forming mould device |
| 11/28/2000 | US6151777 Method of manufacturing a blank raw material for a hose end fitting |
| 11/16/2000 | WO2000068636A1 Armour-piercing bullet |
| 11/14/2000 | US6145365 Method for forming a recess portion on a metal plate |
| 11/07/2000 | US6142004 Load-bearing shaped part and a method for manufacturing shaped parts |
| 11/07/2000 | US6142001 Cylindrical shell for use in gas cylinder fabrication |
| 10/18/2000 | EP0869852B1 Rear drive m113 conversion method |
| 09/20/2000 | EP0787047B1 Process for heading pipe ends and device for implementing it |
| 09/12/2000 | US6116074 Extrusion arrangement and process for manufacturing hollow-profile workpieces made of metal |
| 09/07/2000 | DE10008659A1 Rolling process to produce hollow component from cylindrical blank has two pegs holding blank, with one peg end formed as mandrel and moved towards second peg during rolling |
| 08/31/2000 | DE10005578A1 Hollow body production process, involving forming conical region in workpiece, heating it, applying axial upsetting force and forming step |
| 08/22/2000 | US6105413 Method of forming a one piece steering shaft member |
| 08/17/2000 | WO2000047927A2 Apparatus for swaging an object |
| 08/10/2000 | WO2000045976A1 Method and device for forming metals |
| 08/10/2000 | CA2361521A1 Method and device for forming metals |
| 08/09/2000 | EP1025925A1 Method and device for forming of metals |
| 07/19/2000 | CN1054556C Wedge transverse rolling and vertical forging forming technology of diesel engine oil sprayer |
| 07/11/2000 | US6086480 Process for manufacturing a captive screw |
| 07/04/2000 | US6082811 Reinforcement for vehicle hollow structural member, having decreasing-thickness end portions |
| 06/28/2000 | EP1013357A1 Full enclosed die forging method, full enclosed die forging apparatus, and product of forging |
| 06/14/2000 | EP1007235A1 Manufacture of grease fittings and blanks therefor |
| 05/24/2000 | CN1052670C Device for manufacturing automobile steering rack |
| 05/23/2000 | CA2179225C Method of and apparatus for forming a disc-shaped blank |
| 05/18/2000 | DE19852537A1 Extrusion process for producing seamless hollow body with one closed end, involving forming closed end of hollow block when holing it, displacing material from edge towards center |
| 05/02/2000 | US6056099 Method of making recesses in metallic workpieces for use torque transmitting apparatus |
| 04/25/2000 | US6053023 Method of cold forging a workpiece having a non-circular opening |
| 04/11/2000 | US6047471 Method of making a resistance welding electrode |
| 04/04/2000 | US6045583 Twin-shelled artificial hip joint and its manufacture |
| 03/28/2000 | US6041641 Method for working groove |
| 03/21/2000 | US6039237 Heating tip and method of manufacturing the same |
| 03/21/2000 | US6038771 Method of manufacturing tie rod bar for steering linkage of motor vehicle |
| 03/09/2000 | WO2000012254A1 Process for manufacturing pipes |
| 03/07/2000 | US6033755 Base plate for suspension assembly in hard disk drive with tapered inner barrel |
| 03/01/2000 | EP0981471A1 Housing block |
| 02/22/2000 | US6026666 Method for manufacturing internally geared parts |
| 02/01/2000 | US6018976 Process for tightly closing a bore in a work piece made of ductile material |
| 01/27/2000 | DE19832503A1 Manufacturing rotation symmetrical molded article with undercuts, slots, cavities or threading on inside, by placing removable splay sleeve inside article and then drawing it inside mold |
| 12/30/1999 | DE19827499A1 Pressure rolling unit for forming workpieces |
| 12/28/1999 | US6006579 Method of fabricating shaft from metal plate |
| 12/23/1999 | WO1999065628A1 Method for producing an inner profile or an outer profile by rotary kneading |
| 12/23/1999 | DE19827191A1 Verfahren zur Herstellung einer Innenprofilierung eines hülsenähnlichen metallischen Außenteils und/oder zur Herstellung einer Außenprofilierung eines metallischen Innenteils durch Rundkneten A process for producing an inner profiling of a sleeve-like metallic outer part and / or for the manufacture of an outer profile of a metallic inner member by rotary swaging |
| 12/07/1999 | US5996390 Method for manufacturing vacuum chamber |
| 11/16/1999 | US5983698 Easy removed die core device used for cold swaging |
| 11/10/1999 | EP0955111A1 Integral structure of sheet material and cylindrical member and production method thereof |
| 11/09/1999 | US5979205 Ring manufacturing method and ring manufacturing apparatus |
| 10/28/1999 | DE19818653A1 One piece axle for trailer with strengthened axle ends |
| 10/26/1999 | US5970776 Apparatus for forming a cup-shaped cage |
| 10/21/1999 | WO1999052666A1 Process for manufacturing a captive screw |
| 10/21/1999 | CA2328161A1 Process for manufacturing a captive screw |
| 09/29/1999 | EP0945199A2 Thin, forged magnesium alloy casing and method for producing the same |
| 09/28/1999 | US5956988 Process for heading pipe ends and device for implementing it |
| 09/15/1999 | EP0941783A1 Method of manufacturing an one-piece axle body and axle body manufactured by such a method |
| 09/08/1999 | CN1228066A Bushing base with mounted nozzles |
| 08/31/1999 | US5943749 Method of manufacturing a hollow point bullet |
| 08/25/1999 | EP0937522A1 Method of fabricating shaft from metal plate |
| 08/10/1999 | CA2185815C Method for making upset ends on metal pipe and resulting product |
| 08/05/1999 | WO1999038739A1 Housing block |
| 08/05/1999 | DE19803366A1 Gehäuseblock Housing block |
| 07/06/1999 | US5919094 Propeller shaft |
| 06/08/1999 | US5910052 Process for manufacturing a captive screw |
| 05/25/1999 | US5906047 Manufacture of grease fittings and blanks therefor |