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 11 - Bending not restricted to forms of material mentioned in only one of groups , ,; Bending not provided for in groups; Twisting
Patents for B21D 11 - Bending not restricted to forms of material mentioned in only one of groups , ,; Bending not provided for in groups; Twisting (4,159)
02/1984
02/07/1984US4429558 Method of and apparatus for fabrication of spiral fin
01/1984
01/24/1984CA1160910A1 Method of reducing springback in mechanically pressed sheet materials - i
01/17/1984CA1160512A1 Method of manufacturing roofing
01/10/1984US4424624 Multiple coil heat exchanger
11/1983
11/01/1983US4412438 Pipe bending machine
10/1983
10/26/1983EP0092462A1 Production and transporting apparatus for processed pieces of wire
09/1983
09/14/1983EP0088576A2 Methods and apparatus for manufacturing cutting tools
09/13/1983US4403495 Apparatus for bending channel section members
09/13/1983US4403494 Method of fabricating scroll members by coining and tools therefor
08/1983
08/02/1983US4395901 Running stop
07/1983
07/05/1983CA1149272A1 Method and apparatus for bending elongated pieces
06/1983
06/08/1983EP0080833A1 Steel reinforcement rod and process for producing this rod
05/1983
05/25/1983EP0079587A1 Wire-bending machine
05/18/1983EP0078891A1 Method of and device for forming panels by bending, particularly for cladding the hulls of air craft
05/17/1983US4383430 Bending machine
05/11/1983EP0078485A1 Method of manufacturing a helix
05/10/1983CA1146160A1 Multiple coil heat exchanger
04/1983
04/19/1983US4380573 Method and device for bending section-sheet, plate, strip and like material
04/12/1983US4379397 Apparatus having shaping jaws for manufacturing bodies of spindle-type shapes
04/06/1983EP0076056A1 Apparatus and method for manufacturing helical cores
03/1983
03/29/1983US4377942 Method of bending metal sheet
02/1983
02/15/1983US4373373 Automobile body repair
02/15/1983US4373371 Method of reducing springback in mechanically pressed sheet materials-I
01/1983
01/11/1983US4367641 Apparatus for bending and twisting elongated pieces
01/05/1983EP0068320A1 Electromagnetic stirring method and device for double casting type continuous casting apparatus
12/1982
12/14/1982US4363233 Method and apparatus for cold forming stabilizer blade means from elongated members
12/08/1982EP0066426A2 Scroll manufacturing tool
12/07/1982US4362044 Pipe-bending die and method
11/1982
11/24/1982EP0065426A2 Scroll manufacturing tool
11/02/1982US4356718 Bending tool
10/1982
10/28/1982WO1982003574A1 Method of effecting bending
10/05/1982US4352285 Hydraulic wedge mandrel
09/1982
09/28/1982US4351178 Apparatus for bending a straight tube into a serpentine tube
09/21/1982US4350033 Method and mechanism for constant-measure feed of rod materials
09/08/1982EP0059612A2 A method, broaching tool and broaching machine, for forming scroll members for scroll-type apparatus
09/08/1982EP0059611A2 A method for forming scroll members for scroll-type apparatus
09/08/1982EP0059605A2 A jig for use in bending strip, bar, pipe or the like material
09/08/1982EP0059467A1 Method of fabricating two-piece scroll members and resulting scroll members
09/07/1982US4347726 Method and device for bending sheet-metal sections
07/1982
07/20/1982US4339861 Continuous working process of steel bars for reinforced concrete and apparatus therefor
07/07/1982EP0055436A2 Method of reducing springback in mechanically pressed sheet materials
07/07/1982EP0055435A2 Method of reducing springback in mechanically pressed sheet materials - II
07/07/1982EP0055421A2 Method of reducing curling in pressed sheet materials
04/1982
04/27/1982CA1122389A1 Method of manufacturing a resilient, single or double c-shaped rail clamp
04/21/1982EP0049939A2 Method and apparatus for bending pipes
04/14/1982EP0049313A2 Method and device for bending corrugated or profiled sheet metal
04/06/1982US4322963 Valve stem bender and/or marker
03/1982
03/23/1982US4320648 Method for making roofing
03/09/1982CA1119675A1 Machine for producing reinforcements, in particular for reinforced concrete, and the reinforcements produced thereby
03/02/1982US4317353 Tube twisting apparatus
02/1982
02/09/1982US4314853 Process of mixing reinforcing elements with castable material
02/09/1982CA1117926A1 Method and apparatus for separating strip coil from wound construct
02/02/1982US4313330 Pipe bending apparatus
11/1981
11/17/1981US4300380 Apparatus and a method for use in making a railway rail-fastening clip
11/10/1981CA1112031A1 Method of making a helically corrugated tube
10/1981
10/13/1981US4294102 Device for bending and hardening bar material
10/06/1981US4292834 Irregular shape rod bending apparatus
09/1981
09/30/1981EP0036728A2 Method and apparatus for separating strip coil from wound construct
09/22/1981CA1109301A1 Torsion coiler
09/17/1981WO1981002535A1 A method of bending shaped metal sheet and apparatus for carrying out the method
09/09/1981EP0035483A2 A method of bending shaped metal sheet and apparatus for carrying out the method
09/08/1981US4287743 Method and device for the manufacture of helical rotor blanks for helical gear machines
08/1981
08/25/1981CA1107622A1 Stirrup machine
08/18/1981US4284667 Reinforcing member for castable material and process of mixing reinforcing elements with said material
08/04/1981US4281529 Method of manufacturing a resilient, single or double C-shaped rail clamp
07/1981
07/29/1981EP0032795A2 Apparatus for bending elongate workpieces
07/29/1981EP0032656A2 Installation for manufacturing stirrups of different shapes and sizes, particularly of concrete-reinforcing stirrups
07/07/1981US4276762 Joggling machine
06/1981
06/23/1981US4274275 Method of forming a corrugated annulus
06/09/1981CA1102532A1 Cut-clinch mechanism for variably spaced leads
05/1981
05/19/1981US4267984 Method and apparatus for separating strip coil from wound construct by rotation
05/14/1981WO1981001258A1 Method and device for bending sheet metal
04/1981
04/21/1981US4262515 Method and apparatus for bending a tube
04/21/1981US4262514 Method and apparatus for bending a laminated panel
02/1981
02/17/1981US4250736 Clamping apparatus for transmitting a traction force
02/17/1981US4250728 Apparatus and method for forming steps in profiled sheets of material
02/03/1981US4248273 Stirrup machine
01/1981
01/13/1981CA1093445A2 Accessory for an apparatus for repairing and straightening
01/13/1981CA1093444A2 Accessories for an apparatus for repairing and straightening
01/13/1981CA1093443A2 Accessories for an apparatus for repairing and straightening
12/1980
12/02/1980US4236399 Method of forming a parabolic trough
10/1980
10/14/1980US4228335 Machine for producing reinforcements, in particular for reinforced concrete, and the reinforcements produced thereby
09/1980
09/23/1980US4224377 Reinforcing member for castable material and process of mixing reinforcing elements with said material
09/17/1980EP0015354A1 Stirrup machine
09/02/1980US4220031 Method for bending section-sheet, plate strip and like material
07/1980
07/15/1980US4212188 Apparatus for forming sheet metal
06/1980
06/17/1980CA1079616A1 Portable crimping tool for attachment of sheet metal plates to a frame
05/1980
05/28/1980EP0011175A1 Method and device for manufacturing twisted strips
05/27/1980CA1078153A1 Fixture retaining ring
05/20/1980CA1077690A1 Apparatus for forming serpentine heat exchangers
05/15/1980WO1980000932A1 Method and device for bending corrugated sheet-metal sections
04/1980
04/16/1980EP0009703A1 Bending apparatus for manufacturing a spacing frame for insulating glass panes
04/01/1980US4195511 Apparatus for bending section-sheet, plate strip and the like
03/1980
03/18/1980US4193281 Device for manufacturing coiled magnetic cores for electrical machines
03/04/1980US4191043 Metal duct drive bending tool
02/1980
02/21/1980WO1980000288A1 Process and device for spiral winding of metal band
02/19/1980US4188815 Die changing apparatus for a bending brake
02/19/1980US4188813 Method and machine for the manufacture of long concrete drills provided with helical splines over part of their length
12/1979
12/11/1979US4177662 Machine for the manufacture of axially prestressed coils from strip
10/1979
10/23/1979US4171634 Method of making corrugated tubing with graduated pitch
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