| Patents for B21F 3 - Coiling wire into particular forms (1,688) |
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| 12/08/1993 | EP0572546A1 System and method for joining plastic materials |
| 11/23/1993 | US5263657 Arrangement with a coil forming and conveying system for wire or light-section steel, particularly for high oil weights |
| 11/09/1993 | US5259227 Chuck set-up for spring coiling machine |
| 11/09/1993 | US5259226 Mechanism for forming spring pitch |
| 10/12/1993 | CA1322930C Spring forming machine with conveying device |
| 09/22/1993 | CN1022172C Forming method for stirrup and its forming machine |
| 09/14/1993 | US5243746 Method for manufacturing coil springs |
| 08/11/1993 | EP0554976A1 Rod laying head with front and tail end ring control |
| 07/06/1993 | US5224257 Apparatus for manufacturing a coil element |
| 06/16/1993 | CN1021204C Steel wire coiler for rubber tube |
| 06/15/1993 | US5218882 Cam hub for spring coiling machine |
| 05/12/1993 | EP0541257A1 Improvements in or relating to coil winding |
| 05/12/1993 | EP0541255A1 Improvements in or relating to coil winding |
| 04/20/1993 | US5203191 Versatile automatic metal strip working machine |
| 04/14/1993 | CN1070819A Holder for inserting corneal curvature adjustment ring |
| 04/14/1993 | CN1070818A Holder for inserting corneal curvature adjustment ring |
| 04/13/1993 | US5201208 Coiling point holder for spring coiling machine |
| 03/27/1993 | CA2052299A1 Apparatus for making a torsion spring |
| 03/11/1993 | DE4129172A1 Winding method for heat-treated wire with varying dia. - has central cylindrical wire section pre-curved before coiling, and end sections are coiled elastically |
| 02/23/1993 | US5188125 Method for corneal curvature adjustment |
| 02/02/1993 | US5182930 Method for making coiled springs |
| 12/22/1992 | US5172736 Apparatus for manufacturing spring unit |
| 11/25/1992 | CN2122696U Portable wire coiling machine |
| 10/27/1992 | CA1309318C Coil of tapered wire |
| 09/24/1992 | DE4108881A1 Machine for making springs for spring mattress - has two turntables to carry out two stages of spring forming |
| 09/10/1992 | DE4110313C1 Spring steel wire bending machine - has reversing drive, winding tool and bending mandrel |
| 09/08/1992 | US5144826 Forming device to be practiced in coil spring forming machine and method of replacing said device |
| 09/02/1992 | EP0501219A1 Installation with a coil forming and transferring system for wire or small sections, in particular for heavy-weight coils |
| 08/21/1992 | WO1992015182A1 System and method for joining plastic materials |
| 08/05/1992 | CN1063245A Coiling method of cored multistrand spiral spring and its equipment |
| 07/21/1992 | US5131251 Chuck set-up for spring coiling machine |
| 07/07/1992 | US5127247 Spring coiling machine having interchangeable presettable elements |
| 07/02/1992 | DE4138896A1 Spring coiling machine - has alternative crank and cam mechanisms to give rotary or straight cut |
| 07/01/1992 | CN1017221B Manufacturing method for helical steel band protecting jacket and the equipment thereof |
| 06/04/1992 | DE4038446A1 Wire guide device for cold winding machine - involves roller pressed hydraulically against wire |
| 06/02/1992 | US5117668 Computer controlled coiling machine |
| 05/13/1992 | CN1060984A Forming method and its forming device for stirrup |
| 04/21/1992 | US5105642 Continuous coil spring forming method |
| 04/21/1992 | US5105641 Apparatus for forming wire |
| 04/15/1992 | CN1060237A Steel wire coiler for rubber tube |
| 04/02/1992 | WO1992004996A1 Spring coiling device |
| 03/25/1992 | EP0476227A2 Versatile automatic metal strip working machine |
| 02/20/1992 | DE4040659C1 Metal spring coiling machine - incorporates wire feed, coiling tools and cutter |
| 10/08/1991 | CA1290215C Holder for inserting corneal curvature adjustment ring |
| 09/19/1991 | DE4009492C1 Coil-spring end forming machine - incorporates coiling machine and three=dimensional gripping tong |
| 08/14/1991 | CN1013483B Apparatus for making wire springs |
| 07/03/1991 | EP0398874A4 Holder for inserting corneal curvature adjustment ring |
| 07/03/1991 | EP0344178B1 Winding device for spring winding machines with exchangeable, preadjustable elements |
| 06/25/1991 | US5025648 Coiled spring making apparatus |
| 05/29/1991 | CN1051689A Microcomputer-controlled shaper for rolling poly-gonal, helical hoops |
| 03/20/1991 | EP0417276A1 Apparatus for manufacturing combined springs |
| 03/05/1991 | US4996861 Apparatus for forming an elogated tubular element into a helix |
| 02/20/1991 | CN1011669B Coiling device |
| 02/19/1991 | US4993250 Variable gear ratio coiling machine |
| 02/12/1991 | US4991277 System for manufacturing springs |
| 01/22/1991 | US4986103 Apparatus for coiling springs with tucked ends |
| 01/08/1991 | US4982588 Electric heater coil forming and transporting apparatus |
| 12/27/1990 | EP0403719A1 Improvements in and/or relating to machines for making coil springs |
| 11/28/1990 | EP0398874A1 Corneal curvature adjustment ring |
| 11/22/1990 | EP0397918A2 Wire forming apparatus |
| 11/06/1990 | US4967580 Method and apparatus for making double-coned coil springs |
| 10/31/1990 | CN1046479A Manufacturing method for helical steel band protecting jacket and the equipment thereof |
| 10/10/1990 | CN1009946B Ropeform goods with sheathing from multi-number wires |
| 10/09/1990 | US4961744 Holder for inserting corneal curvature adjustable ring |
| 09/12/1990 | EP0215006B1 Device for bending conical wires |
| 08/14/1990 | US4947670 Universal automatic spring-making machine |
| 08/07/1990 | US4945744 Method and apparatus for forming a barrel coil spring |
| 07/17/1990 | US4942519 Coprocessor having a slave processor capable of checking address mapping |
| 07/03/1990 | US4938046 Spring forming machine with conveying device |
| 06/19/1990 | US4934165 Computer controlled coiling machine |
| 06/13/1990 | EP0372872A2 A method and apparatus for making a double helix thermostat metal spring |
| 05/30/1990 | EP0370109A1 Filament winding apparatus |
| 05/29/1990 | US4928510 Ring coiling machine |
| 05/23/1990 | EP0369173A2 Computer controlled coiling machine |
| 05/01/1990 | US4920624 Method and apparatus for making a double helix thermostat metal spring |
| 04/24/1990 | US4918958 Device for bending conical wires |
| 04/17/1990 | CA2000843A1 Computer controlled coiling machine |
| 02/27/1990 | US4904176 Device for continuously producing reinforced stabilizable profiled bodies by a mandrel and a support |
| 01/31/1990 | EP0352933A2 Method and apparatus for forming a barrel coil spring |
| 01/16/1990 | US4893491 Apparatus for forming coil springs |
| 12/26/1989 | US4889327 Multiple-strand torsion spring |
| 12/06/1989 | EP0344178A1 Winding device for spring winding machines with exchangeable, preadjustable elements. |
| 12/05/1989 | US4884428 Spring producing apparatus |
| 11/21/1989 | US4881393 Wire coiling apparatus |
| 11/21/1989 | CA1263070A1 Machine for production of coil springs |
| 10/25/1989 | EP0338153A1 Spring producing apparatus |
| 10/17/1989 | US4873854 Computer controlled coiling machine |
| 10/03/1989 | US4870742 Coil winding machine |
| 09/26/1989 | CA1260805A1 Wire forming apparatus |
| 09/20/1989 | EP0333358A2 Multiple-strand torsion spring and method of forming the same |
| 09/20/1989 | CN2044524U Universal full-automatic spring coiler with continuous feeding |
| 09/08/1989 | WO1989008072A1 Filament winding apparatus |
| 09/08/1989 | WO1989007994A1 Apparatus for manufacturing combined springs |
| 09/05/1989 | US4862720 Apparatus for making wire springs |
| 08/16/1989 | CN1034685A Apparatus for making wire springs |
| 08/10/1989 | WO1989007023A1 Apparatus for the manufacture of helical tension and compression springs |
| 07/13/1989 | DE3744640A1 Method for winding (coiling) helical springs |
| 07/12/1989 | EP0323534A1 Forming device to be practiced in coil spring forming machine and method of replacing said device |
| 07/05/1989 | EP0322605A2 Method of making double-coned coil spring and apparatus therefor |
| 06/14/1989 | CN2039238U Forming machine for spring washer |