| Patents for B21H 3 - Making helical bodies or bodies having parts of helical shape (2,057) |
|---|
| 08/05/2003 | US6601659 Twist drill |
| 07/29/2003 | US6598453 Tooth rolling flat dies and method for forming teeth |
| 07/29/2003 | US6598444 Tangential rolling head |
| 07/23/2003 | CN2561535Y Apparatus for rolling straight ribs on steel bars |
| 07/23/2003 | CN1115212C Process for processing square bar stud bolt |
| 07/15/2003 | US6591657 Method of manufacturing ball joint |
| 07/09/2003 | CN1428211A Heating exchanger pipe with two-sided structure and its manufacturing method |
| 07/03/2003 | US20030121346 Rolled ball screw and method for rolling ball screw groove |
| 07/02/2003 | EP1323952A2 Rolled ball screw and method for rolling ball screw groove |
| 07/02/2003 | CN2558480Y Automatic rolling head for reinforcing bar external straight thread |
| 07/02/2003 | CN2558479Y Rolling head for rolling wave thread |
| 06/18/2003 | CN2555962Y Rolling device for cold extruding external screw |
| 05/28/2003 | CN1419977A Rotary shaft with screw and mfg method thereof |
| 05/22/2003 | US20030095850 Screw shaft and method of manufacturing the same |
| 05/22/2003 | US20030094272 Heat-exchanger tube structured on both sides and a method for its manufacture |
| 05/21/2003 | EP1312885A2 Heat exchange tube structured on both sides and process for making same |
| 05/21/2003 | CN1108889C Self-locking serew for manufacturing method |
| 05/14/2003 | EP1310309A1 Tangential rolling head |
| 05/14/2003 | CN1416975A Rolling method and equipment |
| 05/08/2003 | US20030084697 Tangential rolling read |
| 05/07/2003 | CN1107562C Tech for mfg. helicoid of sealer for steel drum as package container |
| 05/06/2003 | CA2230213C A heat transfer tube and method of manufacturing same |
| 04/30/2003 | CN2547435Y 可调式滚轧头 Adjustable head rolling |
| 04/29/2003 | CA2268878C Method of working connection end of deformed bar for reinforcing concrete, deformed bar worked by the method and structure deformed bar |
| 04/23/2003 | EP1303368A1 Method for producing a shaft and device containing one such shaft |
| 04/17/2003 | US20030072635 Bolt and thread rolling die and the manufacture of the bolt |
| 04/16/2003 | EP1302678A2 A bolt and thread rolling die and the manufacture of the bolt |
| 04/16/2003 | CN1410183A Manufacturing method of high strength thread roller |
| 04/10/2003 | US20030066326 Thread-rolling machine with rotatable rolling plates |
| 04/01/2003 | US6540619 Bolt and a manufacturing method thereof |
| 03/26/2003 | CN2541084Y Reinforced bar end wire roller mill |
| 03/26/2003 | CN1406158A Smart machine tool system |
| 03/20/2003 | WO2003023239A1 Self-tapping screw, blank, method and dies for making the same and method for joining thin workpieces |
| 03/19/2003 | CN2540241Y Thread rolling machine for thread machining on reinforcing bar end |
| 03/13/2003 | US20030049095 Self-tapping screw, blank and method for joining thin workpieces and production method for the same |
| 03/05/2003 | EP1286794A1 Cold rolling machine |
| 03/05/2003 | CN2538449Y Equipment for cutting and rolling thread on reinforcing bar and steel rod |
| 02/27/2003 | DE10156374C1 Heat exchange tube structured on both sides has inner fins crossed by secondary grooves at specified rise angle |
| 02/20/2003 | WO2003013758A1 Cold forming tool, machine and method |
| 02/19/2003 | CN1398325A Lightweight threaded fastener and thread rolling die |
| 02/11/2003 | US6516650 Rolling dies for producing dog point threads |
| 02/05/2003 | CN2533965Y Reinforced bar thread rolling machine |
| 02/04/2003 | US6514148 Thread rolling tap |
| 01/22/2003 | EP1277530A2 Thread rolling tool and method using this tool |
| 01/22/2003 | EP1124658A4 Vertically movable forming racks |
| 01/22/2003 | CN2531898Y Multi-function machine tool with straight screw rolling cutter for steel bar excircle |
| 01/21/2003 | US6508095 Thread-rolling end-working attachment |
| 01/21/2003 | CA2254205C Fastening screw and method of forming same |
| 01/16/2003 | US20030014150 Smart machine tool system |
| 01/15/2003 | CN1390657A Method instead f cold rolling for making spline or screw template |
| 01/08/2003 | EP1272295A1 Thread-rolling end-working attachment |
| 01/07/2003 | US6502443 Component rolling tool of dynamic pressure groove and component rolling method |
| 01/03/2003 | WO2003000443A1 Rolling method with round dies |
| 01/02/2003 | EP1270963A1 Fastner having multiple-bossed lead |
| 12/25/2002 | CN1386604A Auger drill |
| 12/19/2002 | WO2002100570A1 Improved thread roll dies |
| 12/19/2002 | US20020192051 Fastener having multiple lobed thread |
| 12/19/2002 | US20020192050 Fastner having multiple-bossed lead |
| 12/18/2002 | CN2526118Y Screwplate for rolling moulding self-tapping locking screws |
| 12/18/2002 | CN2526102Y Once shaper for screw on reforcing bar upsetting wire head |
| 12/17/2002 | US6494656 Self-tapping screw, blank and method for joining thin workpieces and production method for the same |
| 12/17/2002 | CA2144957C Screw conveyors, augers and flighting for use therein |
| 12/04/2002 | CN2523535Y Improvement of microadjusting feeding structure of threading apparatus |
| 11/27/2002 | EP1260338A2 Twist drill |
| 11/27/2002 | EP1259335A1 Smart machine tool system |
| 11/21/2002 | US20020170752 Twist drill |
| 11/07/2002 | US20020162372 Precise columnar member and method of producing the same |
| 10/30/2002 | CN2518620Y Derib rolling straight thread machine |
| 10/29/2002 | US6470723 Apparatus for manufacturing internal grooved tube |
| 10/10/2002 | WO2002078874A1 Thread rolling machine for eliminating rolling/working of undersize low hardened/high hardened components and its method |
| 10/03/2002 | WO2002076646A1 Improvements in and relating to rock bolting |
| 10/02/2002 | CN2513696Y Roll for forming reinforced bar |
| 10/01/2002 | US6457516 Heat transfer tube for evaporation with variable pore sizes |
| 09/11/2002 | EP1237667A1 Precise columnar member and method of producing the same |
| 09/05/2002 | DE10206744A1 Gewindewalzbacke und Verfahren für die Herstellung Thread rolling die and process for the production |
| 09/04/2002 | CN2508874Y Forming Machine for reinforced bar single-thread screw coupling end |
| 09/04/2002 | CN1367053A Process for processing square bar stud bolt |
| 08/22/2002 | US20020112524 Thread roll dies |
| 08/22/2002 | US20020112518 Thread rolling die and process for the production thereof |
| 08/22/2002 | DE10105827A1 Vorrichtung zum spanlosen Umformen von langgestreckten Werkstücken Apparatus for chipless forming elongated workpieces |
| 08/21/2002 | CN1364668A Method for producing ring gear |
| 08/15/2002 | WO2002062506A1 Device for forming elongated workpieces without chip removal |
| 08/15/2002 | US20020108418 Thread rolling head |
| 08/14/2002 | EP1231001A1 Thread rolling head |
| 08/14/2002 | EP1229871A1 An element intended to be implanted in body tissue, and a device for manufacturing such an element |
| 08/14/2002 | CN2505202Y Screw-thread rolling tool capable of automatic expanding hob |
| 08/08/2002 | US20020104350 Apparatus for manufacturing internal grooved tube |
| 08/07/2002 | CN1362899A Thread-rolling end-working attachment |
| 07/30/2002 | US6425829 Threaded load transferring attachment |
| 07/24/2002 | CN1359770A Cold-pressing technology for making equistrength archor arm and its end |
| 07/17/2002 | CN2500409Y Screw-threading cold rolling machine |
| 07/10/2002 | CN2499158Y Screw rolling machine for inner thread |
| 07/03/2002 | EP1219366A2 Method for manufacturing a profile, especially a thread, on steel rods and installation and device therefor |
| 06/25/2002 | US6408501 Automatic system of manufacturing ball studs for vehicles |
| 06/19/2002 | CN1086449C Connecting element and its manufacturing method |
| 05/23/2002 | WO2002040895A1 Ball screw |
| 05/23/2002 | DE10056275A1 Ball bearing operated spindle drive, comprising separately produced bracket and nut, attached to each other with specific method |
| 05/22/2002 | CN2492334Y Screw bolt roller with adjustable bolt diameter and lift angle |
| 05/22/2002 | CN2492333Y Rotary thread roller |
| 05/08/2002 | CN1347775A Internal screw copper pipe machining process and its special apparatus |