Patents
Sitemap › B21 - Mechanical metal-working without essentially removing material; Punching metal › B21H - Making particular metal objects by rolling, e.g. screws, wheels, rings, barrels, balls › B21H 3 - Making helical bodies or bodies having parts of helical shape
Patents for B21H 3 - Making helical bodies or bodies having parts of helical shape (2,057)
07/2000
07/18/2000US6089068 Method of manufacturing a shaft having a fluid flow passage
07/12/2000EP1017518A1 Flowturning device and method for producing internal geared wheels with two sets of inner toothing
07/12/2000CN2386906Y Cold rolled screw machine
06/2000
06/14/2000CN2382493Y Tail cutting type teeth scrubbing plate
06/02/2000WO2000031424A1 Short point anti-cross-threading screw
05/2000
05/25/2000DE19852208A1 Measuring device used for monitoring a rolling device producing metal profiles has integrated sensors
05/24/2000EP1001860A1 Flat thread rolling die for pointed screws
05/17/2000EP0745011B1 Thread formation
05/11/2000WO2000026546A1 Lightweight threaded fastener and thread rolling die
05/10/2000EP0998359A1 Device and method for moulding a grooved structure into a tubular workpiece
04/2000
04/19/2000CN1250848A Connecting elements and its manufacture method
03/2000
03/23/2000WO1999067540A3 Thread forming fastener
03/16/2000WO2000013817A1 Light alloy thread-forming screw and its production method
03/16/2000DE19840298A1 Selbstgewindeformende Schraube aus Leichtmetall und Verfahren zu ihrer Herstellung Self-tapping screw made of light metal and process for its preparation
03/15/2000EP0985470A2 Ball screwed nut, linearly guiding apparatus using the same, ball screw for steering and method of manufacturing the ball screwed nut
03/07/2000US6033313 Male screw and method for manufacturing same
03/07/2000US6033153 Rock bolt and method of installing a rock bolt
03/02/2000WO2000011358A1 Fastener having a lobular cross section and ridges along the thread axis
03/02/2000CA2339790A1 Fastener having a lobular cross section and ridges along the thread axis
03/01/2000EP0981692A1 Threaded fastener, method of making a threaded fastener and rolling dies for making a threaded fastener
02/2000
02/17/2000DE19836771A1 Shaping process for producing grooves in hardened workpieces uses interchangeable tool plates whose engagement area is made from hard brittle material which breaks in event of excessive strain
01/2000
01/26/2000CN2360189Y Thread extruding shaper
01/25/2000US6017274 Method of forming a fastener
01/05/2000CN2356779Y Variable tooth type screw axial feed thread rolling die
12/1999
12/29/1999WO1999067540A2 Thread forming fastener
12/22/1999CN1239172A Processing method and connection structure of joint end of reinforced special and steel for concrete
12/16/1999WO1999064186A1 Vertically movable forming racks
12/16/1999WO1999064185A1 Power transmission formation rolling machine
12/16/1999WO1999064184A1 Antifriction support for roll forming racks
12/16/1999CA2332857A1 Vertically movable forming racks
12/16/1999CA2332850A1 Power transmission formation rolling machine
12/16/1999CA2332335A1 Antifriction support for roll forming racks
12/01/1999CN2351231Y Thread rolling head
11/1999
11/24/1999EP0958072A1 Improvements relating to screws and threadforms
11/24/1999CN1236420A Self-locking screw and method for manufacturing the same
11/23/1999US5987953 Power transmission formation rolling machine having movable headstock and tailstock spindle supports
11/16/1999US5983690 Machine having antifriction support for forming racks for rolling power transmission formations
10/1999
10/26/1999US5970768 Machine base for supporting vertical movement of forming racks for rolling power transmission formations
10/26/1999US5970611 Method for processing a rotor used for a super charger
10/06/1999EP0947642A2 Method of working connection end of deformed bar for reinforcing concrete, deformed bar worked by the method and structure of connecting deformed bar
10/05/1999US5961267 Thread forming fastener
09/1999
09/29/1999CN2340534Y Clamp of thread forming machine
09/23/1999WO1999047290A1 Rolling die and method of treating surface of rolling die
09/23/1999WO1999047288A1 Thread rolling die and surface treatment method for thread rolling dies
09/07/1999US5947827 Method of reducing sliding friction of threaded rolled fasteners
08/1999
08/31/1999US5943904 Thread-rolling die
08/17/1999US5937684 Tap employing deformation of matter
07/1999
07/21/1999EP0930441A1 Self-locking screw and method for manufacturing the same
07/20/1999US5924317 Radial roller head
07/13/1999US5921735 Lobular fastener with rectilinear pitch profile
06/1999
06/29/1999US5916318 Machine for simultaneously forming threads or fins on multiple cylindrical workpieces
06/02/1999CN2321557Y Screw bolt rolling mill
05/1999
05/26/1999EP0918165A2 Fastening screw and method of forming same
05/26/1999CN1217244A Threading tool for rolling compound thread and processing method thereof
05/20/1999WO1999024191A1 Improvements relating to screws and threadforms
04/1999
04/29/1999WO1999020416A1 Method of manufacturing a shaft having a fluid passage
03/1999
03/31/1999EP0739256B1 Method of making a screw thread on a corrugated bar
03/31/1999CN1042748C Deformed rod steel with high adhesion and high strength
02/1999
02/24/1999CN2308460Y Screw rolling tool for working anti-loosening bolt
02/18/1999WO1999008009A1 Self-locking screw and method for manufacturing the same
02/18/1999WO1999007496A1 Flat thread rolling die for pointed screws
02/18/1999CA2296998A1 Flat thread rolling die for pointed screws
02/16/1999US5870918 Thread rolling head
02/09/1999US5868536 Male screw and method for manufacturing same
02/03/1999EP0894555A2 Profile rolling machine with supporting frame
01/1999
01/28/1999WO1999003618A1 Device and method for moulding a grooved structure into a tubular workpiece
01/21/1999DE19731055A1 Vorrichtung und Verfahren zum Einformen einer Rillenstruktur in ein rohrförmiges Werkstück Apparatus and method for molding a groove structure into a tubular workpiece
01/12/1999CA2125357C Self-drilling screw
12/1998
12/03/1998WO1998053934A1 Flowturning device and method for producing internal geared wheels with two sets of inner toothing
12/03/1998DE19722359A1 Drückwalzvorrichtung und Verfahren zur Herstellung von Hohlrädern mit zwei Innenverzahnungen Flow-forming device and procedure for the production of hollow wheels with internal toothings two
12/03/1998DE19722310A1 Cold rolling machine
12/01/1998US5842923 Screw and method for its production
11/1998
11/19/1998WO1998051933A1 Threaded fastener, method of making a threaded fastener and rolling dies for making a threaded fastener
09/1998
09/24/1998DE19710730A1 Rolling method and two-roll profile rolling machine for manufacturing cylindrical worm profiles
09/23/1998EP0865838A1 A heat transfer tube and method of manufacturing same
09/23/1998CN1193722A Heat transfer tube and method of manufacturing same
09/22/1998US5810670 Method of manufacturing connector bolt
09/22/1998US5809822 Method of producing a metallic hollow body with a breaking line
08/1998
08/13/1998DE19704505A1 Pipe coupling bolt mfg method
08/11/1998US5791997 Method and apparatus for fabricating one piece all metal prevailing torque locknut fasteners
08/04/1998US5788441 Lightweight, compact, threaded fastener and thread rolling die for making same
07/1998
07/28/1998US5784912 Tangential rolling head
07/22/1998EP0853991A1 Radial rolling head
07/21/1998US5782145 Process for the fabrication of a multi-blade tool
07/07/1998US5776001 Thread formation
07/01/1998CN2285173Y Screw rolling ring-gear roller
06/1998
06/16/1998US5765419 Method and apparatus for a rolling of hollow articles
06/10/1998CN2283531Y Integral forming device for pipe clamp screw
06/09/1998US5761983 Output shaft of booster
05/1998
05/27/1998CN1182652A Method for making joint screw of steel bar end and mfg. device thereof
05/20/1998EP0842721A1 Method for processing a rotor used for a super charger and the like
05/05/1998US5746095 Method of forming rotary drilling tools
04/1998
04/28/1998US5743123 Method of thread rolling a screw shaft
04/08/1998CN1178145A Method and apparatus for manufacturing metal workpieces with internal screw
04/07/1998US5735658 Thread forming tool
03/1998
03/19/1998DE19637134A1 Pipe socket with rolled threads
03/04/1998CN1174944A Screw with drill
02/1998
02/19/1998DE19632633A1 Cold deforming device for circumferential region of cylindrical workpiece
02/18/1998EP0824198A1 Screw having a self drilling point
12/1997
12/23/1997US5699691 Adjusting apparatus for roll threading die head
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