Patents
Sitemap › B21 - Mechanical metal-working without essentially removing material; Punching metal › B21D - Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing material; Punching › B21D 7 - Bending rods, profiles, or tubes
Patents for B21D 7 - Bending rods, profiles, or tubes (6,195)
08/1991
08/14/1991DE4003797A1 Tube-bending appts. with additional internal heating coil - uses latter to cause softening of tube material in region of outer inductor surrounding transition to curved section
08/13/1991CA1287561C Precision bending apparatus and process
08/08/1991WO1991011278A1 Drive unit for a modular-construction workpiece processing centre
08/07/1991CN2082206U Six roller type bending machine for u-shape steel support
08/06/1991US5036692 Method for bending pipes and apparatus therefor
08/06/1991US5036688 Fender forming system
08/01/1991DE4002127A1 Pipe bending machine - has bending arm drive mounted at distance from bending roller
07/1991
07/27/1991CA2034723A1 Pipe bending machine with bending heads
07/25/1991WO1991010519A1 Machine for bending rod-shaped material
07/24/1991EP0437714A1 Bending assembly with satellite
07/16/1991US5031291 Apparatus for bending elongated materials in a continuous manner
07/03/1991CN2080004U Cutting pliers for al corner
07/02/1991US5027633 Box makers forms
06/1991
06/30/1991CA2031737A1 Bending assembly with satellite
06/25/1991US5025651 Movable shears upstream of a bending assembly and method to bend the trailing end of bars
06/25/1991US5025650 Apparatus for forming plates of irregular cross-sectional shape
06/19/1991EP0432347A1 Curved pipe manufacturing method and an apparatus for carrying out same
06/12/1991EP0431418A2 Apparatus for bending rod-shaped radially non-rotatable material
06/12/1991CN2078663U Hot bending die for heavy caliber thick tube
06/11/1991US5022249 Portable manually-controlled three-speed pipe-bending machine
06/11/1991CA2016474A1 Curved pipe manufacturing method and an apparatus for carrying out same
05/1991
05/15/1991EP0427038A1 Rod-bender plant with device for setting the size of rods
05/10/1991CA2029414A1 Rod-bender plant with device for setting the size of rods
05/02/1991CA2027263A1 Quick change tooling for press machine
05/01/1991CN2075991U Manual roller pipe bender
04/1991
04/30/1991US5010758 Bending machine
04/24/1991CN1050835A Variable-diameter special-shaped seamless metal pipe bend forming method
04/24/1991CN1050834A Seamless copper pipe bend forming method
04/16/1991US5007269 Wire bending device
03/1991
03/27/1991EP0419443A1 Machine for bending bar material in reinforcing elements for concrete
03/26/1991US5001922 Quick change tooling for press machine
03/26/1991CA1281943C2 Spacer for multiple-pane windows
03/21/1991WO1991004112A1 Device for bending rod-like material to form concrete reinforcements
03/21/1991CA2042025A1 Device for bending rod-like material to form concrete reinforcements
03/20/1991EP0417703A2 Method of executing additional processes of work operations on bar material workpieces and machine for carrying out such method
03/19/1991CA1281620C Apparatus for bending structural metal rails
03/07/1991DE3935545C1 Pipe bending machine - has independent bending heads on sides of clamping head to pivot around axis parallel to pipe
03/05/1991US4996866 Orientable bending assembly
03/05/1991US4996815 Process to manufacture a seal-holding profile and the profile obtained from said process
02/1991
02/21/1991WO1991001829A1 Means for providing very small bend radii in tube-like structures
02/20/1991CN1049304A Method of making metal bends
02/19/1991US4993253 Drawing unit downstream of a bending assembly and method to bend the trailing end of bars
02/14/1991DE4025297A1 Wiper blade lamina - may be curved at one end only, centrally, or along its length in sinuous manner or at each end
02/12/1991US4991293 Means for providing very small bend radii in the tube-like structures
02/07/1991DE3925950A1 Bending machine for pipes - has bending tool driven by screwed spindle
02/05/1991US4989441 Tube-bending device
02/05/1991US4989435 Method and apparatus for manufacturing curved pipe
02/05/1991US4989429 Rocker bending unit
01/1991
01/30/1991CN2070209U Parallel bending device for angle 180 deg.c with small curve
01/22/1991US4986104 Portable pipe-binding minimachine
01/16/1991CN2069314U Dual-function metal elbow and pipe bending machine
01/02/1991EP0405600A1 Method and apparatus for bending manufacturing of long workpiece
01/01/1991US4981030 Portable pipe bending machine with electromechanical control
12/1990
12/26/1990CN1047992A Power transmission
12/25/1990US4979385 Process and apparatus for monitoring backspringing when bending an elongated element such as a pipe
12/19/1990EP0402594A1 Electrohydraulic system
12/18/1990US4977771 Device for bending thin metallic pipe
12/14/1990CA2018891A1 Method of bending
12/13/1990DE4018180A1 Specified pipe bending with rated angle and radius
12/12/1990EP0401819A2 Method of bending tubes
11/1990
11/28/1990CN1010562B Roller-swinging type profiles bender with four rollers
11/22/1990EP0398486A2 Box makers forms
11/22/1990EP0398280A2 Universal bending apparatus
11/22/1990DE4002364A1 Bending esp. of metallic rods, tubes or profiles - involves softening of metal by resistance heating current supplied through fixing clamp and sliding torsion device
11/20/1990US4970885 Electrohydraulic system
11/20/1990CA1276535C Apparatus for bending rectangular tubes
11/20/1990CA1276534C Bending apparatus
11/07/1990EP0396489A2 Additional bender of metal wire working machines for creation of three dimensional shapes (Forms)
11/07/1990EP0396030A2 Heating apparatus for a machine for working plastic materials
11/07/1990CN2065103U Hydraulic rail bender
11/06/1990US4967585 Bending die and ram assembly for tube bending machine
11/06/1990US4967472 Automatic apparatus for securing fastener having torque and rotational indicating means
10/1990
10/31/1990DE4012736A1 Bending device for small dia. pipes
10/31/1990CN2064688U Push type z shape pipe bender
10/23/1990US4964290 Small-diameter metallic conduit bending machine
10/09/1990US4961335 Small-diameter metallic conduit
10/02/1990US4959984 Precision bending apparatus
09/1990
09/12/1990EP0386457A1 Orientable bending assembly
09/12/1990EP0386456A1 Shears unit
09/12/1990EP0386083A1 A method and apparatus for bending corrugated sheet.
09/12/1990EP0215006B1 Device for bending conical wires
09/11/1990US4955222 Deforming panels having ribs
09/06/1990CA2011331A1 Orientable bending assembly
09/06/1990CA2011330A1 Shears unit
08/1990
08/29/1990EP0384477A2 Method and machine for bending tubes
08/22/1990CN2060699U Forming machine for skeleton of automobile seal element
08/08/1990EP0381025A1 Method and apparatus for the cold deformation of ferrous and non-ferrous metal sections by spatial coil roll bending
08/08/1990CN2060094U Angle steel winding machine
08/07/1990US4945751 Re-rod cutter and bender
08/07/1990US4945747 Apparatus for bending elongated materials in any direction
08/07/1990US4945619 Apparatus for converting tubular blanks into spacer frames of multiple-pane windows
08/02/1990DE3900990A1 Method for computer-supported mapping of the layout of, and device for manufacturing spatially bent, small-calibre pipelines, in particular fuel lines or brake lines in the car industry
07/1990
07/31/1990US4944147 Apparatus for forming horse shoes
07/25/1990EP0379043A1 Drawing unit downstream of a bending assembly and method to bend the trailing end of bars
07/25/1990EP0379030A1 Movable shears upstream of a bending assembly and method to bend the trailing end of bars
07/25/1990EP0379029A1 Rocker bending unit
07/18/1990CA2007982A1 Rocker bending unit
07/17/1990US4941338 Device for cold forming of ferrous and non-ferrous metal sections
07/12/1990DE3942191A1 Trennvorrichtung fuer biegemaschinen Benders separation assembly for
07/05/1990DE4000020A1 Small metal pipe-bending machine - has die in sections curving to lesser radii than finished article
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