| Patents for B21D 9 - Bending tubes using mandrels or the like (1,513) |
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| 05/03/1989 | EP0314055A2 Curved pipe manufacturing method and an apparatus for carrying out same |
| 01/31/1989 | US4800949 Method and installation for the continuous manufacture of pipes from spheroidal graphite cast-iron having a controlled structure |
| 01/17/1989 | CA1248740A1 Method for preparing tubular chills for continuous steel casting plants |
| 12/22/1988 | DE3719033A1 Tube-bending machine with a bending mandrel |
| 12/06/1988 | US4788845 Pipe bending machine |
| 11/23/1988 | EP0291567A2 Precision bending apparatus and process |
| 11/01/1988 | US4781047 Controlled spin flow forming |
| 08/03/1988 | EP0276290A1 Process and apparatus for manufacturing tube bends. |
| 07/19/1988 | US4757702 Bending and twisting apparatus and method for printing machine threading tube |
| 07/06/1988 | CN87210664U Small curvature semidiameter cold-pushing elbow forming unit. |
| 05/17/1988 | US4744233 Apparatus for bending rectangular tubes |
| 04/20/1988 | EP0264082A2 Hollow profiles of non-ferrous metals and their alloys with cold-formed bendings |
| 03/22/1988 | US4732025 Precision bending apparatus and process |
| 03/02/1988 | EP0257182A2 Pipe-bending machine |
| 03/02/1988 | CN87207856U Cold rotating pipe-bender |
| 03/02/1988 | CN87203197U Core rod expanding and pushing stainless steel bend |
| 02/25/1988 | WO1988001207A1 Process and apparatus for manufacturing tube bends |
| 12/05/1987 | CN86208918U Rotary pipe bender head |
| 11/11/1987 | EP0245050A2 Apparatus and method for controlled spin flow forming of containers and containers per se |
| 11/04/1987 | EP0243789A2 Method for manufacturing moulds for continuous-casting machines |
| 09/01/1987 | US4689981 Draw-bending method |
| 07/08/1987 | EP0227779A1 Pipe bending machine |
| 07/08/1987 | EP0227778A1 Pipe bending machine |
| 06/19/1987 | DE3641895A1 Method and device for bending hollow profiles, preferably manometer springs |
| 06/09/1987 | US4671096 For bending tubes |
| 04/22/1987 | EP0219453A1 Apparatus for bending a metal pipe |
| 04/16/1987 | DE3534510A1 Installation for the production of helical-seam tubes |
| 03/31/1987 | US4653306 Method for preparing tubular chills for continuous steel casting plants |
| 03/04/1987 | CN85106156A Follow bar with cam tracks for rocker type conduit bender |
| 03/03/1987 | US4647255 Pipe bend restrictor |
| 02/10/1987 | CA1217701A Resilient internal mandrel |
| 01/27/1987 | US4639158 Fluid pressurized joint assembly |
| 01/15/1987 | WO1987000097A1 Pipe bending machine |
| 01/15/1987 | WO1987000096A1 Pipe bending machine |
| 01/14/1987 | CN86103963A Rectangle-tube mandrel |
| 01/13/1987 | US4635464 Tube bending mandrel |
| 09/24/1986 | EP0195408A2 Improved flexible mandrel for bending hollow articles |
| 08/13/1986 | EP0190458A1 Process and apparatus for continuously manufacturing spheroidal graphite cast iron pipes with a controlled microstructure |
| 08/12/1986 | CA1209453A1 Pipe bend restrictor |
| 07/15/1986 | CA1207646A1 Machine and method for rotary compressing bending |
| 07/02/1986 | CA1206859A Tube bending mandrel |
| 06/17/1986 | CA1206082A1 Pipe bending machine |
| 06/03/1986 | CA1205367A1 Automatic machine for curving, in a spatial configuration, thin and rectilinear metal elements, more especially metal wires |
| 04/08/1986 | CA1202871A1 Pipe bending machine with bending mandrel |
| 01/14/1986 | US4563891 Pipe bending machine |
| 01/14/1986 | CA1199259A1 Portable conduit bending apparatus |
| 01/07/1986 | US4562630 Method for the manufacture of heat exchanger elements |
| 12/04/1985 | EP0163056A2 Method of manufacturing bent, double-walled tube sections for waste gas arrangements of motor vehicles and tool for carrying out the method |
| 11/19/1985 | CA1196843A1 Method and apparatus for forming a pipe fitting |
| 10/22/1985 | US4548657 Bow control for metallic structures |
| 10/01/1985 | US4543809 Apparatus for bending thin-walled pipes |
| 09/24/1985 | US4542637 Tube bending mandrel |
| 09/03/1985 | US4538436 Pipe bending machine with bending mandrel |
| 08/27/1985 | US4537053 Pipe bending machine |
| 07/30/1985 | CA1191080A1 Reciprocating machine component |
| 06/25/1985 | US4524599 Rotary compression bending machine |
| 04/17/1985 | EP0137583A1 Improvements in or relating to joint assemblies |
| 01/16/1985 | EP0131429A2 Draw-bending apparatus and method |
| 01/15/1985 | US4493203 Resilient internal mandrel |
| 01/02/1985 | CA1180259A Tube bender construction |
| 12/25/1984 | US4489585 Production of tubular members |
| 11/13/1984 | US4481803 Method for eliminating distortion at the end of a tube bend |
| 10/09/1984 | US4475375 Multi-flex tube bending mandrel |
| 08/15/1984 | EP0115796A2 Resilient internal mandrel |
| 08/14/1984 | US4464923 Method and apparatus for bending corrugated pipe |
| 08/14/1984 | US4464918 Method and apparatus for automatic feed of mandrel tube bender |
| 05/16/1984 | EP0108193A2 Pipe-bending machine |
| 05/08/1984 | US4446713 Apparatus and method for bending insulated piping |
| 04/25/1984 | EP0106030A1 Bending machine with mandrel |
| 04/24/1984 | CA1166134A1 Tube bending mandrel |
| 02/01/1984 | EP0099714A1 Method for bending pipes |
| 11/22/1983 | US4416136 Pipe-bending machine |
| 09/27/1983 | US4406147 Pipe-bending apparatus |
| 06/22/1983 | EP0081979A1 Improvements in or relating to the production of tubular members |
| 04/26/1983 | US4380920 Adjustable wiper die for bending tubular members |
| 04/26/1983 | US4380917 Tube-bending machine |
| 04/05/1983 | US4378689 Core for a pipe that is to be bent |
| 10/05/1982 | US4352285 Hydraulic wedge mandrel |
| 05/25/1982 | US4331016 Tube bending apparatus with elongated inner mandrel |
| 05/25/1982 | US4331015 Tube bending machine with axially movable inner core |
| 04/28/1982 | EP0050363A1 Method and device for the manufacture of heat exchanger panels |
| 02/16/1982 | US4315423 Tube bending mandrel |
| 01/06/1982 | EP0043335A1 Apparatus for the continuous hot-forming of metallic pipe bends |
| 10/20/1981 | CA1110958A1 Tube expander |
| 06/09/1981 | CA1102671A1 Tube forming process |
| 06/09/1981 | CA1102670A1 Forming die and process for tubular fittings |
| 05/26/1981 | US4269054 Bending method |
| 12/16/1980 | US4238945 Apparatus for bending a jacketed tube |
| 09/02/1980 | CA1084781A1 Method and apparatus for forming a cylindrical metal can body |
| 06/03/1980 | US4205544 Apparatus for bending corrugated pipe |
| 05/06/1980 | US4201073 Reaction bender for pipe |
| 08/14/1979 | US4164135 Rotary internal pipe bending mandrel |
| 02/06/1979 | US4137743 Process and apparatus for bending two tubes with one extending through the other |
| 02/06/1979 | CA1047900A1 Method for producing large diameter steel pipes |
| 01/23/1979 | US4135380 Method of and an apparatus for manufacturing elongated curved tubular elements |
| 11/07/1978 | US4123930 Mandrel for bending tubes |
| 10/10/1978 | CA1039992A1 Deflection compensating roll |
| 09/05/1978 | CA1037786A1 Tooling for sheet metal forming apparatus |
| 08/29/1978 | CA1037319A2 Forming method and machine for splining power transmission members |
| 07/25/1978 | US4102169 Method and apparatus for pipe bending |