| Patents for B21H 3 - Making helical bodies or bodies having parts of helical shape (2,057) |
|---|
| 12/11/1997 | DE19723634A1 Method for making connecting screw |
| 12/10/1997 | EP0811443A1 Tangential rolling head |
| 11/25/1997 | US5690003 Method of forming a drill bit with debris conveying flute |
| 11/25/1997 | US5689882 Method of producing a rear wheel spindle |
| 10/21/1997 | US5678440 Screw conveyors, augers and flighting for use therein |
| 10/15/1997 | EP0800877A1 Thread rolling head |
| 09/24/1997 | EP0796680A1 Method for the manufacture of screw bolts or threaded tie bars |
| 09/16/1997 | US5667443 Bolt including a cleaning thread point tip |
| 09/03/1997 | EP0792705A2 Drill bit - roll forging process |
| 08/26/1997 | US5660594 Method of making a threaded connection for reinforcing bars |
| 08/07/1997 | WO1997027962A1 Multi-penetration computerized thread rolling system |
| 08/01/1997 | CA2195921A1 Method of thread rolling a screw shaft |
| 07/30/1997 | EP0785831A1 Method of producing a metal hollow body, hollow bodies produced according to this method and device for carrying out this method |
| 07/23/1997 | EP0660764B1 Method and apparatus for producing helical flighting for screw conveyors |
| 07/16/1997 | CN1154468A Method and device for testing defect on the surface of shaft like parts |
| 07/15/1997 | US5647803 Thread cutting device |
| 07/03/1997 | WO1997023314A1 Fastener transfer device |
| 06/24/1997 | US5641028 Drill bit with debris conveying flute |
| 06/05/1997 | DE19545129A1 Manufacturing device for rod form objects, e.g. screws |
| 06/04/1997 | EP0776712A1 Method for the production of a special screw for hinges in furniture and screws obtained with this method |
| 06/04/1997 | EP0746697A4 Fastener with thread lock |
| 05/15/1997 | DE19541955A1 Rolling device, with improved rolling efficiency |
| 04/30/1997 | CN1148533A Drill bit with debris conveying flute |
| 04/16/1997 | CN2252067Y Correction instrument for screw make-up machine |
| 04/03/1997 | DE19536817A1 Profile rolling tool for cold rolling of workpiece |
| 03/19/1997 | EP0560789B1 Improved fixing |
| 03/19/1997 | CN2249646Y Thread roller |
| 03/12/1997 | EP0761353A1 Drill bit |
| 03/05/1997 | CN1144149A Method for making rotary drill tool |
| 02/20/1997 | WO1997005976A1 Screw rolling method, rolling apparatus and rolling die |
| 01/28/1997 | US5597357 Self-drilling screw |
| 01/22/1997 | EP0754511A2 Method for rolling profiles in a workpiece |
| 12/18/1996 | EP0748668A2 Method for manufacturing rotary drill bits |
| 12/12/1996 | DE19520699A1 Roller tool for preparing multi-thread pitch profile on cylindrical shaft section of workpiece |
| 12/11/1996 | EP0746697A1 Fastener with thread lock |
| 12/04/1996 | EP0745011A1 Thread formation |
| 10/30/1996 | EP0739256A1 Method of making a threaded connection for reinforcing bars |
| 10/29/1996 | US5568743 Axial thread rolling head |
| 10/23/1996 | CN2238098Y Thread rolling machine with improved structure |
| 10/10/1996 | DE19513168A1 Profile rolling machine with three spindles rotating in same plane |
| 10/01/1996 | US5560238 Thread rolling monitor |
| 09/18/1996 | CN2235331Y Inner screwed drawing and rolling machine for mfg. coiled pipe |
| 09/17/1996 | US5555757 Metal forming machine |
| 09/11/1996 | EP0730509A1 Process for producing a multi-blade tool |
| 09/04/1996 | CN2234322Y Screw-thread milling shaping device for wire |
| 08/13/1996 | US5544993 Threaded fastener |
| 08/06/1996 | US5542275 Flat die thread roller |
| 08/01/1996 | WO1996022845A1 Method of producing a metal hollow body, hollow bodies produced according to this method and device for carrying out this method |
| 07/02/1996 | US5531553 Masonry fixing |
| 05/01/1996 | CN1031693C Roller for thread of cover plate billet of metal container |
| 04/24/1996 | CN2225318Y Thread rolling mill for steel bar end connection |
| 04/16/1996 | US5507169 Throw away thread rolling die |
| 03/21/1996 | DE19532709A1 Nut with polygonal outer part for engagement by tool |
| 03/20/1996 | CN1118811A Differencial shaped rod steel with high adhesion and high strength |
| 03/20/1996 | CA2132357A1 Thread cutting device for tubular members |
| 03/19/1996 | US5499895 Bolt including a cleaning thread point tip |
| 03/14/1996 | WO1996007504A1 Process for producing a multi-blade tool |
| 03/12/1996 | US5497642 Apparatus and method for forming precision surfaces on shaft-like components |
| 03/07/1996 | WO1996007015A1 A rock bolt and method of installing a rock bolt |
| 03/07/1996 | DE4443736A1 Verfahren zur Herstellung eines Mehrschneiden-Werkzeuges A process for producing a multi-cutting tool |
| 03/07/1996 | CA2197997A1 A rock bolt and method of installing a rock bolt |
| 02/28/1996 | EP0698431A1 Adjusting apparatus for roll threading die head |
| 02/21/1996 | CN1117121A A selflock bolt, a process for producing the selflock bolt, and a dice used directly in the working of the process invention |
| 01/30/1996 | US5487633 Self-drilling screw |
| 01/16/1996 | US5483810 Die set for forming a fastener with thread lock |
| 12/27/1995 | EP0688617A1 Method and device for rolling of hollow work pieces |
| 12/06/1995 | CN1112861A Spinning disk pressing and drawing machine for mfg. internal screw tube |
| 11/15/1995 | EP0682187A2 Method of manufacturing a screw and screw blank for this method |
| 11/08/1995 | CN2211864Y Hydraulic rolling long screw thread machine |
| 10/04/1995 | CN2208995Y Screw extrusion self-tapping bolt combs |
| 08/24/1995 | WO1995022422A1 Thread formation |
| 08/16/1995 | CN1106718A Rib-rolling mill |
| 07/05/1995 | EP0660764A1 Screw conveyors, augers and flighting for use therein. |
| 06/28/1995 | EP0660004A1 Fastening element with a thread profile for optimizing tensioning |
| 06/14/1995 | DE4342415A1 Thread profile for fixing elements |
| 06/01/1995 | DE4340162A1 Method of threaded or smooth rolling of sleeve or bolt shaped metal workpieces |
| 05/23/1995 | US5417096 Method for producing a thread rolling machine for use with different die sizes |
| 05/23/1995 | US5417095 Thread rolling attachment and method |
| 04/19/1995 | CN2194774Y High-speed screw rolling machine |
| 04/12/1995 | CN2194224Y Cold-rolling machine |
| 03/16/1995 | DE4430184A1 Axial thread-rolling head |
| 03/07/1995 | US5395195 Thread-forming screw with tri-roundular, tapered end |
| 01/17/1995 | US5381682 Apparatus and method of manufacturing masonry fasteners |
| 01/10/1995 | US5379623 Radial milling head |
| 01/10/1995 | US5379622 Method of forming helical splines with stoppers on a rotary shaft, and rolling tools for practicing the method |
| 01/10/1995 | US5379620 Apparatus and method for forming precision surfaces on shaft-like components |
| 12/27/1994 | CA1333652C Method of forming a screw thread and tubular body with a screw thread |
| 12/20/1994 | US5374146 Bolt including a cleaning thread point tip |
| 12/14/1994 | CN2185164Y Special rolling cutter for making new nail mould |
| 11/22/1994 | US5365763 Device for shaping of helical fins on the outer wall of a tube |
| 11/03/1994 | DE4313918A1 Apparatus for the non-cutting shaping of a workpiece |
| 10/25/1994 | US5358366 Screw and thread rolling die |
| 09/21/1994 | EP0615800A1 Screw with ogive point and process for its production |
| 09/15/1994 | DE3390141C2 Device for the final machining of a convolution, cut in a cylindrical piece, by finish rolling |
| 09/13/1994 | US5345800 Flat die thread roller |
| 08/23/1994 | US5340253 Fastener with thread lock |
| 08/10/1994 | CN2173670Y Fast head stock mechanism for screw rolling machine |
| 06/23/1994 | WO1994013965A1 Fastener with thread lock |
| 06/23/1994 | CA2151837A1 Fastener with thread lock |
| 06/15/1994 | CN1087953A Mfg. of double-screw bolt without decarburizing layer |