| Patents for B21F 35 - Making springs from wire (1,103) |
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| 11/22/2000 | EP1052920A1 Spring interior and method of making same |
| 11/15/2000 | EP1051271A1 Method and apparatus for forming spring units |
| 11/08/2000 | EP1049548A1 Programmable servo-motor quality controlled continuous multiple coil spring forming method and apparatus |
| 11/07/2000 | US6142002 Spring manufacturing apparatus and tool selection apparatus |
| 11/02/2000 | EP1048374A2 Spring coiling arrangement, in particular for spring coiling machines |
| 10/18/2000 | EP0817925A4 Mattress innerspring structure having coaxial coil units |
| 10/17/2000 | US6132533 Method for making arcuate coil springs, resulting springs and devices for carrying out the method |
| 10/17/2000 | CA2121392C Steel material for colored spring, method for producing colored spring, and colored spring |
| 09/26/2000 | CA2100422C Method of and device for manufacturing curved helical springs |
| 09/20/2000 | EP1036851A1 High fatigue-strength steel wire and spring, and processes for producing these |
| 09/19/2000 | US6119322 Cased coil spring producing apparatus |
| 08/30/2000 | EP0814923A4 Coil spring interior assembly method and apparatus |
| 08/23/2000 | CN1264327A Method and apparatus for manufactring coil springs |
| 08/08/2000 | USRE36809 Coil spring interior assembly method and apparatus |
| 07/06/2000 | DE19919956C1 Spring winding machine produces selectively right or left-wound screw springs from wire and has intake rollers feeding wire along guide axis through wire guide with two winding apparatus |
| 07/05/2000 | EP1015151A1 Method and apparatus for manufacturing coil springs |
| 05/16/2000 | US6062054 Spring forming apparatus |
| 03/22/2000 | CN1247780A Close-pitch spring coiling method and equipment |
| 03/02/2000 | DE19938905A1 A wire spring manufacturing machine has a rotating turret holding several selectable forming tools with has numerically controlled movement in three axes |
| 03/02/2000 | DE19938855A1 Spring prodn. system using wire emanating from end section of wire guide and coercive bending or coiling or winding of wire by tools in spring shaping chamber |
| 02/29/2000 | US6029494 Spring producing device |
| 02/15/2000 | US6023955 Device for the bending of springs for spring interior mattresses |
| 01/26/2000 | CN2360188Y Spring coiling machine |
| 01/25/2000 | US6017641 Coil spring comprising oil-tempered steel wire with internal hardness of more than hv 550 and which has been decarburized during heating prior to quenching; automobile internal combustion engine valve springs |
| 12/29/1999 | EP0967031A2 Cased coil spring producing apparatus |
| 12/28/1999 | US6006572 Spring manufacturing machine |
| 12/22/1999 | EP0965399A2 Process for the manufacture of a wire spring from a hard metal wire having a round section |
| 12/22/1999 | CN2354693Y Spring pre-press |
| 12/08/1999 | CN2352287Y Machine for making spring from wire |
| 10/07/1999 | WO1999050175A1 Apparatus for the production of pocketed coil springs |
| 10/07/1999 | CA2326597A1 Apparatus for the production of pocketed coil springs |
| 09/14/1999 | US5950473 Coil spring forming and conveying assembly |
| 08/17/1999 | US5937685 Method and apparatus for linear spring |
| 08/03/1999 | US5930897 Method and apparatus for tempering knotted coil springs |
| 07/21/1999 | EP0930112A2 Spring manufacturing machine |
| 07/15/1999 | WO1999034943A1 Spring winding automatic machine |
| 07/15/1999 | DE19800671A1 Federwindeautomat Spring Coiling Machine |
| 07/01/1999 | WO1999032244A1 Programmable servo-motor quality controlled continuous multiple coil spring forming method and apparatus |
| 06/24/1999 | WO1999030853A1 Method and apparatus for forming spring units |
| 05/27/1999 | WO1999025509A1 Spring interior and method of making same |
| 05/26/1999 | EP0917498A1 Device for the bending of springs for spring interior mattresses |
| 05/20/1999 | WO1999024630A1 High fatigue-strength steel wire and spring, and processes for producing these |
| 05/12/1999 | EP0914881A1 Compression spring and method and device for its manufacture |
| 03/30/1999 | US5887471 Spring manufacturing apparatus and manufacturing method of the same |
| 03/03/1999 | EP0899035A2 Method and apparatus for tempering knotted coil springs |
| 03/03/1999 | EP0899034A2 Coil spring forming and conveying assembly |
| 03/02/1999 | US5875666 Spring manufacturing apparatus and position adjustment apparatus for tools |
| 03/02/1999 | US5875664 Programmable servo-motor quality controlled continuous multiple coil spring forming method and apparatus |
| 02/28/1999 | CA2245459A1 Coil spring forming and conveying assembly |
| 02/28/1999 | CA2245454A1 Method and apparatus for tempering knotted coil springs |
| 02/09/1999 | US5868996 Device for manufacturing curved helical springs |
| 02/02/1999 | US5865051 Procedure and apparatus for the optimized manufacture of coil springs on automatic spring winding machines |
| 01/27/1999 | CN2305260Y Pressure spring pin mechanism for snake-like spring machine |
| 01/27/1999 | CN2305259Y Every cam coaxial driver for central concaved spring coiling machine |
| 01/19/1999 | US5860308 Auxiliary bending device for a spring-making machine |
| 12/30/1998 | CN2302070Y Feeding mechanism for improved spring-making machine |
| 12/09/1998 | CN2299676Y Feed mechanism of automatic spring coiling machine |
| 12/03/1998 | WO1998053933A1 Method and apparatus for manufacturing coil springs |
| 12/03/1998 | CA2291822A1 Method and apparatus for manufacturing coil springs |
| 11/26/1998 | WO1998027234A3 Helical spring with high volumetric efficiency and method for the production thereof |
| 11/24/1998 | US5839312 Spring manufacturing apparatus |
| 10/20/1998 | US5823233 Apparatus for cutting and crimping coil |
| 10/14/1998 | CN2294124Y Motor cutter shaft driving mechanism for middle concave spring coil |
| 10/07/1998 | CN2293403Y Universal automatic spring-making machine |
| 10/07/1998 | CN2293402Y 改进型弹簧制造机 Improved Spring Manufacturing Machine |
| 10/06/1998 | US5816091 Wire shaping apparatus, in particular universal spring winding machine, with cutting device |
| 09/30/1998 | CN1194187A Method for producing bend screw spring, spring made therefrom and apparatus for working said method |
| 09/08/1998 | US5803440 Mattress innerspring structure having coaxial coil units |
| 08/11/1998 | US5791184 Spring-making machine |
| 07/30/1998 | WO1998032555A1 Device for the bending of springs for spring interior mattresses |
| 07/30/1998 | CA2250172A1 Device for the bending of springs for spring interior mattresses |
| 06/25/1998 | WO1998027234A2 Helical spring with high volumetric efficiency and method for the production thereof |
| 06/02/1998 | US5758420 Process of manufacturing an aneurysm clip |
| 05/27/1998 | EP0796158B1 Method and device for the optimized production of helical springs on automatic spring-winding machines |
| 05/27/1998 | CN1182651A Controller for multi-axle spring making machine and operation setting method |
| 05/20/1998 | EP0842720A2 Method for the manufacture of a coil spring |
| 05/14/1998 | DE19708087C1 Method for prevention of breakage of helical tension spring fixture loops |
| 04/28/1998 | US5743428 In a merchandise dispenser |
| 04/15/1998 | CN1179203A Mattress innerspring structure having coaxial coil units |
| 03/31/1998 | US5732584 Method and apparatus for roll forming convoluted springs |
| 03/31/1998 | US5732583 Wire forming apparatus |
| 03/25/1998 | EP0830462A1 Method for making arcuate coil springs, resulting springs and devices for carrying out the method |
| 03/17/1998 | US5727435 Severance control for sinuous wire forming machine |
| 03/05/1998 | WO1998008632A1 A method and apparatus for roll forming convoluted springs |
| 02/26/1998 | DE19736478A1 Coiling head and controller for manufacturing springs |
| 02/26/1998 | DE19736468A1 Coil-spring winding production machine |
| 02/03/1998 | US5713115 Electronically regulated apparatus for coiling springs |
| 01/28/1998 | CN1171309A Method and apparatus for linear spring |
| 01/21/1998 | EP0819484A1 Method and apparatus for producing linear springs |
| 01/14/1998 | EP0817925A1 Mattress innerspring structure having coaxial coil units |
| 01/14/1998 | EP0724406A4 Process of manufacturing an aneurysm clip |
| 01/07/1998 | EP0814923A1 Coil spring interior assembly method and apparatus |
| 11/05/1997 | EP0804978A1 Twisting or bending machine for making either mono or double winding coil springs |
| 11/04/1997 | US5683521 Reducing thickness of oxide film by electropolishing; low temperature annealing |
| 10/01/1997 | EP0798489A2 Helical compression spring and method for producing same |
| 10/01/1997 | EP0798058A2 Wire forming apparatus, in particular a universal spring coiling machine with cutting device |
| 09/24/1997 | EP0796158A1 Method and device for the optimized production of helical springs on automatic spring-winding machines |
| 09/09/1997 | US5665179 Process for producing a coil spring |
| 08/26/1997 | US5660067 Versatile spring making machine |
| 07/22/1997 | US5649363 Method of manufacturing printed springs |