| Patents for B21F 35 - Making springs from wire (1,103) |
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| 07/15/1997 | US5647127 Manufacturing process of coil |
| 06/05/1997 | DE19544365A1 Coil spring with curved axis under load |
| 05/28/1997 | CN2254786Y Spring making machine with improved mechanism for adjusting the distance between rings |
| 04/22/1997 | US5622358 Wave spring |
| 04/15/1997 | US5620170 Coil spring supporting device |
| 04/09/1997 | CN2251454Y Inactive coil escapement for spring making machine |
| 03/27/1997 | WO1997011201A1 Method for making arcuate coil springs, resulting springs and devices for carrying out the method |
| 03/20/1997 | DE19534077A1 Mfg. appts. for forming spring |
| 03/13/1997 | DE19533562A1 Versatile machine for manufacture of springs |
| 12/25/1996 | CN2243354Y Automatic spring winding apparatus |
| 12/03/1996 | US5579810 Coil spring interior assembly method and apparatus |
| 11/28/1996 | WO1996037320A1 Spring formation |
| 11/13/1996 | EP0742061A1 Electronically controlled winding device for mattresses or upholstery springs |
| 10/24/1996 | DE19528294C1 Mfg process for helical pressure spring prodn |
| 09/26/1996 | WO1996029524A1 Mattress innerspring structure having coaxial coil units |
| 09/12/1996 | WO1996027461A1 Coil spring interior assembly method and apparatus |
| 09/12/1996 | CA2212171A1 Coil spring interior assembly method and apparatus |
| 08/29/1996 | DE19506422A1 Coaxial coil spring arrangement |
| 08/07/1996 | EP0724406A1 Process of manufacturing an aneurysm clip |
| 07/10/1996 | EP0586711B1 Steel wire with excellent formability into spring and production thereof |
| 07/04/1996 | DE19547005A1 Wire-forming machine |
| 06/13/1996 | WO1996017701A1 Method and device for the optimized production of helical springs on automatic spring-winding machines |
| 05/28/1996 | US5520194 Guide wire for medical purpose and manufacturing process of coil thereof |
| 05/08/1996 | CN1121847A Method for mfg. high-prestressed tension spring |
| 04/23/1996 | US5509642 Mattress innerspring structure having coaxial coil units |
| 03/12/1996 | US5497811 Device for bending the ends of metallic binding spirals |
| 01/31/1996 | EP0694621A1 Process for producing a coil spring |
| 01/11/1996 | DE4447253A1 Spiral spring mfg device |
| 12/26/1995 | US5477893 Knot-tying mechanism |
| 10/03/1995 | US5455121 Having electrodeposited layer of copper and zinc/chromium alloy which alloys copper with zinc and forms chromate coating during annealing to appear black; workability, electroconductivity |
| 10/03/1995 | US5454249 Spring toe forming device and method |
| 10/03/1995 | US5454150 Manufacturing methods for machining spring ends parallel at loaded length |
| 09/26/1995 | US5452598 Automatic spring formation apparatus |
| 08/22/1995 | US5442945 Method of and device for manufacturing curved helical springs |
| 08/22/1995 | US5442944 Auto-feed control mechanism for computerized numerically-controlled spring forming machine |
| 08/09/1995 | EP0666086A1 Guide wire for medical purpose and manufacturing process of coil thereof |
| 07/12/1995 | CN2203197Y Spring winding and knotting gear |
| 05/17/1995 | EP0417276B1 Apparatus for manufacturing combined springs |
| 05/16/1995 | US5415208 Auxiliary spring bending machine |
| 04/27/1995 | WO1995010983A1 Process of manufacturing an aneurysm clip |
| 04/27/1995 | CA2174226A1 Process of manufacturing an aneurysm clip |
| 03/14/1995 | US5397359 Metal wire structure for endoprosthetics |
| 03/08/1995 | EP0641952A1 Coil spring supporting device |
| 02/15/1995 | CN2189503Y Special coil-spring machine |
| 12/14/1994 | EP0628365A1 Device for bending the ends of metallic binding spirals |
| 12/07/1994 | CN2184499Y Middle concave spring binding machine end ring profiling and its clamp |
| 12/06/1994 | CA1333355C Method and apparatus for forming a barrel coil spring |
| 10/19/1994 | EP0620292A2 Steel material for colored spring, method for producing colored spring, and colored spring |
| 10/12/1994 | CN2179217Y Auxilary bending structure of spring machine |
| 10/06/1994 | DE4410963A1 Sinuous spring |
| 09/21/1994 | CN2177545Y Multifunctional machine for making coiled spring |
| 09/21/1994 | CN2177544Y Improved machine for making spring |
| 09/14/1994 | CN2176854Y Controlling mechanism for tool-holder movement of spring-winding machine |
| 08/17/1994 | CN2174276Y Universal automatic spring machine |
| 04/28/1994 | DE4306895C1 prodn. of screw spring - involves spring wire with fully round cross=section guided by motor-driven drawing rollers to work area of winding tool |
| 03/16/1994 | EP0586711A1 Steel wire with excellent formability into spring and production thereof |
| 03/02/1994 | EP0584474A1 Process and apparatus for manufacturing curved helical springs |
| 03/02/1994 | EP0584468A1 Process and apparatus for manufacturing curved helical springs |
| 02/22/1994 | CA1327120C Apparatus for manufacturing spring unit |
| 02/15/1994 | US5285669 Spring manufacturing apparatus and spring cutting mechanism |
| 02/09/1994 | CN2155282Y High-porecision cylindrical spring winder |
| 01/11/1994 | US5277046 Coil winding method and apparatus for dampening vibrations |
| 11/09/1993 | US5259226 Mechanism for forming spring pitch |
| 09/30/1993 | WO1993019225A1 Steel wire with excellent formability into spring and production thereof |
| 09/14/1993 | US5243746 Method for manufacturing coil springs |
| 05/12/1993 | EP0541257A1 Improvements in or relating to coil winding |
| 05/12/1993 | CN1072002A Spiral compression spring and coiled spindle using topological structure |
| 04/20/1993 | US5203849 Canted coil spring in length filled with an elastomer |
| 03/27/1993 | CA2052299A1 Apparatus for making a torsion spring |
| 02/10/1993 | EP0526689A1 Process for the making of a helical compression spring |
| 02/10/1993 | EP0526682A1 Endoprosthesis with a metal wire mesh |
| 02/02/1993 | US5182930 Method for making coiled springs |
| 01/27/1993 | CN1068281A Pitch controlling method and apparatus for manual spring reeling |
| 12/22/1992 | US5172736 Apparatus for manufacturing spring unit |
| 12/15/1992 | US5170654 Method for wire bending in three dimensions |
| 11/03/1992 | US5160122 Coil spring with an elastomer having a hollow coil cross section |
| 10/27/1992 | CA1309318C Coil of tapered wire |
| 09/29/1992 | US5150600 Resilient member nesting apparatus |
| 09/08/1992 | US5144826 Forming device to be practiced in coil spring forming machine and method of replacing said device |
| 08/05/1992 | CN1063245A Coiling method of cored multistrand spiral spring and its equipment |
| 05/26/1992 | CA1301610C Bending machine |
| 05/12/1992 | US5111678 Electric heater coil transferring and forming apparatus and method of use |
| 04/21/1992 | US5105641 Apparatus for forming wire |
| 03/04/1992 | EP0473085A2 Canted coil spring in length filled with an elastomer |
| 02/20/1992 | DE4040659C1 Metal spring coiling machine - incorporates wire feed, coiling tools and cutter |
| 10/16/1991 | EP0452246A2 Method for wire bending in three dimensions |
| 10/09/1991 | EP0450392A1 Coil spring with an elastomer having a hollow coil cross section |
| 09/19/1991 | DE4009492C1 Coil-spring end forming machine - incorporates coiling machine and three=dimensional gripping tong |
| 09/04/1991 | CN1013743B Device for making springs from wire |
| 08/20/1991 | CA1287785C Bending machine |
| 08/14/1991 | CN1013483B Apparatus for making wire springs |
| 07/31/1991 | CN2081768U Automatic spring winder |
| 06/25/1991 | US5025648 Coiled spring making apparatus |
| 03/20/1991 | EP0417276A1 Apparatus for manufacturing combined springs |
| 01/22/1991 | US4986103 Apparatus for coiling springs with tucked ends |
| 12/27/1990 | EP0403719A1 Improvements in and/or relating to machines for making coil springs |
| 11/22/1990 | EP0397918A2 Wire forming apparatus |
| 11/06/1990 | US4967580 Method and apparatus for making double-coned coil springs |
| 09/12/1990 | EP0215006B1 Device for bending conical wires |
| 08/22/1990 | CN2060699U Forming machine for skeleton of automobile seal element |