| Patents for B21D 9 - Bending tubes using mandrels or the like (1,513) |
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| 06/01/1999 | US5907896 Method for bending forging artistic metallic pipes |
| 05/12/1999 | DE19749369A1 Device for bending tube |
| 05/05/1999 | CN1215635A Protective mould means for bending small-bore thin wall metal floral tube |
| 04/28/1999 | EP0910486A1 Method and modular-multistation device for folding profiles |
| 04/21/1999 | EP0909231A1 Curved wall and ceiling frame member and method and apparatus for producing the same |
| 04/15/1999 | DE19745315A1 Method for bending duo-pipe for conducting exhaust gas in automotive internal combustion engines |
| 04/06/1999 | US5890387 Apparatus and method for forming and hydropiercing a tubular frame member |
| 03/17/1999 | EP0901847A1 Mandrel for supporting the inside wall of a pipe during the cold-bending of said pipe in a press |
| 02/18/1999 | WO1999007540A1 Method for bending closed hollow sections using the support of a medium |
| 02/11/1999 | DE19733932A1 Verfahren zur Biegung von geschlossenen Hohlprofilen mit Mediumunterstützung Method for bending of closed hollow sections with medium support |
| 02/02/1999 | US5865054 Apparatus and method for forming a tubular frame member |
| 01/28/1999 | DE19730658A1 Bending jig for split hollow sections |
| 01/19/1999 | US5860307 Method and apparatus for forming a bent pipe |
| 12/10/1998 | DE19721654A1 Light-metal profile bending method, for space frames for motor vehicles |
| 11/05/1998 | WO1998048957A1 Method and modular-multistation device for folding profiles |
| 10/29/1998 | DE19717472A1 Verfahren und Vorrichtung zum Profilbiegen mit modularen Biegestationen Method and apparatus for bending profiles with modular bending stations |
| 10/20/1998 | US5823031 Method and apparatus for bulge forming and bending tubes |
| 10/08/1998 | WO1998043777A1 Curved wall and ceiling frame member and method and apparatus for producing the same |
| 09/22/1998 | US5809818 High-pressure piping metal tube and process for manufacturing the same |
| 09/08/1998 | US5802898 Apparatus for forming a tubular frame member |
| 08/27/1998 | DE19707228A1 Mandrel for manual, semi- or fully-automatic pipe bender |
| 08/20/1998 | DE19706218A1 Forming bent component within framework of internal high-pressure forming technology |
| 08/13/1998 | DE19704645A1 Double-walled bent exhaust pipe making process |
| 08/05/1998 | EP0856367A2 Stretch forming metal bodies with polymeric internal mandrels |
| 07/22/1998 | EP0853510A1 Programmable pressure controlled mandrel extractor for tube bending machine |
| 06/30/1998 | US5771730 Equipment for forming metal profiles |
| 06/04/1998 | DE19648169A1 Bending machine with two bending functions |
| 05/28/1998 | WO1998022237A1 Bending mandrel |
| 05/27/1998 | EP0844033A2 Bending machine with at least two bending functions |
| 05/12/1998 | US5749255 Bending device for hollow double-structured pipe |
| 04/07/1998 | US5735160 Stretch forming metal bodies with polymeric internal mandrels |
| 04/07/1998 | US5735156 Method and apparatus for forming a non-circular pipe |
| 04/02/1998 | DE19640136A1 Method of deforming twin jacket tubes |
| 03/31/1998 | CA2143255C Process and apparatus for hydroforming a vehicle manifold |
| 03/18/1998 | CN1037752C Method of bending metallic pipe |
| 03/04/1998 | EP0826440A1 Apparatus for forming metal sections |
| 02/28/1998 | CA2213687A1 Equipment for shaping metal sections |
| 02/04/1998 | CN1037244C Method for manufacturing elbow |
| 01/22/1998 | DE19700759C1 Profile for side airbag of motor vehicle |
| 01/14/1998 | CN1169892A Apparatus and method for bending forging metal pipe as artist product |
| 12/16/1997 | US5697155 Method of manufacturing a branched pipe by internal high-pressure forming |
| 11/26/1997 | CN2268588Y Multifunctional and automatic digit controlling pipe bender |
| 11/18/1997 | CA2005178C Precision bending apparatus |
| 11/11/1997 | US5685190 Expanding mandrel, expanding method and expanding apparatus using the expanding mandrel and heat exchanger with heat exchanging tubes expanded by the expanding method |
| 10/30/1997 | WO1997039845A1 Process and device for core winding roll bending of hollow sections |
| 10/30/1997 | DE19616048A1 Verfahren zum Kern-Wickel-Roll-Biegen von Hohlprofilen A method of core winding roll bending hollow profiles |
| 10/22/1997 | CN2265260Y Same-side driving type simple pipe-bending machine |
| 10/22/1997 | CN2265259Y Die for bending metal tube material |
| 10/07/1997 | US5673929 Process of hydroforming tubular suspension and frame components for vehicles |
| 06/24/1997 | US5641176 Process of hydroforming tubular suspension and frame components for vehicles |
| 06/09/1997 | CA2192275A1 Tubing end and method for forming |
| 05/27/1997 | US5632176 Programmable pressure controlled mandrel extractor for tube bending machine |
| 05/02/1997 | EP0770435A1 Method for making a construction part and axle support |
| 04/10/1997 | WO1997012699A1 Programmable pressure controlled mandrel extractor for tube bending machine |
| 03/25/1997 | US5613394 Method and apparatus for filling and discharging a filling material |
| 02/12/1997 | CN1142416A Method and apparatus for bending pipes |
| 12/31/1996 | US5588505 Cleaning attachment for internal tube mandrel |
| 12/24/1996 | US5586462 Device and method for forming bent pipe of non-annular cross-section |
| 12/19/1996 | DE19616484A1 Method of cold bending of hollow workpieces |
| 11/13/1996 | EP0742057A2 Process of hydroforming tubular suspension and frame components for vehicles |
| 10/15/1996 | US5564303 Internal mandrel for use in pipe bending |
| 10/10/1996 | DE19512646A1 Method and appts. for finish bending of a pre-bent pipe |
| 10/09/1996 | CN2236908Y High cycle wheel pipe machine |
| 10/02/1996 | CN1132123A Processing tech for short radius elbow |
| 09/17/1996 | US5555762 Filling pipes with molten fatty acids, cooling, solidification, bending, melting and separation of filling from bent pipe |
| 09/11/1996 | CN1130551A Cold drawing technique for forming reducing stainless steel elbow and teapot mouth made thereby |
| 08/07/1996 | CN1032463C Bending method for square pipe |
| 06/26/1996 | EP0718053A1 Method for freezing a liquid used for bending a double-wall pipe |
| 05/15/1996 | CN1122266A Slaved tube length control for hairpin bender |
| 03/19/1996 | US5499520 Apparatus for forming a tubular frame member |
| 02/07/1996 | EP0695591A1 Device for bending hollow non-closed profile sections |
| 01/24/1996 | EP0693330A1 Method and device for bending tubes |
| 01/23/1996 | US5485737 Apparatus for hydroforming a vehicle manifold |
| 01/16/1996 | US5483809 Process for bending a metal tube to a small radius of curvature and a bent metal tube |
| 01/09/1996 | US5481892 Apparatus and method for forming a tubular member |
| 12/06/1995 | CN1030437C Precise pipe bender for cold-bending cored steel pipe with push |
| 12/06/1995 | CN1030436C Equipment for shaping cold bending pipe with small radius of curvature |
| 12/05/1995 | US5471857 Process for hydroforming a vehicle manifold |
| 11/08/1995 | CN1111447A Tube expanding mandrel, tube expanding method and tube expanding apparatus using tube expanding mandrel, and heat exchanger having heat exchanging tube which is subjected to tube expanding by tube exp |
| 10/25/1995 | EP0678352A1 Tube expanding mandrel, tube expanding method and tube expanding apparatus using tube expanding mandrel, and heat exchanger having heat exchanging tube which is subjected to tube expanding by tube expanding method |
| 10/18/1995 | EP0677342A2 Method of and device for bending hollow section work pieces |
| 10/11/1995 | CN2209564Y Rectangular tube small curvature radius bender |
| 08/23/1995 | EP0668114A1 A tool for making U-shaped bends in heat-exchanger tubes having radial fins projecting from the internal walls of the tubes |
| 08/23/1995 | CN2205751Y Soft connecting mandrel device for rectangle elbow |
| 08/10/1995 | DE4403992A1 Reusable tube end plugging device for copper pipes |
| 07/04/1995 | CA2101320C Apparatus for bending beams |
| 06/28/1995 | EP0659500A1 A method of bending a pipe having an oblong cross-section and a heat exchanger with pipes having an oblong section and bent in a U-shape |
| 05/31/1995 | CN1028614C Making method for shaped-bend and shaped-joint of pipe |
| 05/24/1995 | DE4339290A1 Verfahren und Werkzeug zum Herstellen von Rohr-T-Stücken mit gekrümmtem Abzweig aus Rohrstücken nach dem Innenhochdruck-Umformverfahren Method and tool for making pipe tees with a curved branch of pipe sections according to the internal high pressure forming |
| 05/24/1995 | CN1028497C Tube-bending method |
| 05/03/1995 | CN2195984Y Equipment for bending tube |
| 04/18/1995 | US5406821 Tube bending apparatus and method |
| 03/29/1995 | CN1100676A Method and apparatus for filling and discharging a filling matelial |
| 03/23/1995 | DE4331609A1 Method and apparatus for bending tubes |
| 03/22/1995 | EP0644123A2 Anti-bending corrugated system for metallic containers |
| 03/14/1995 | US5396786 Machine and method for manufacturing crossover fittings |
| 03/01/1995 | EP0640416A2 Method and apparatus for filling and discharging a filling material |
| 02/21/1995 | US5390538 Process for bending metal hollow sections and apparatus for carrying out the process |
| 01/18/1995 | EP0634236A1 Method of making rotors for excentric spiral pumps |
| 01/10/1995 | US5379624 Slaved tube length control for hairpin bender |