| Patents for B21J 7 - Hammers; Forging machines with hammers or die jaws acting by impact (996) |
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| 03/06/1990 | US4905495 Long forging machine for the forging of round or sharp-edged bars |
| 02/13/1990 | US4899570 Apparatus and method of rotary forging with induction heating |
| 01/25/1990 | WO1990000452A1 Rotary hammering machine |
| 01/23/1990 | US4895213 Press with a knuckle joint escapement |
| 12/20/1989 | CN2049568U 弹簧锤 Spring hammer |
| 12/06/1989 | CN2048793U Dual-peen radial forging machine |
| 12/06/1989 | CN2048792U Four-peen radial forging machine |
| 11/30/1989 | WO1989011347A1 Device for cyclic deformation of continuous strip |
| 11/14/1989 | US4879893 Multipurpose swaging machine |
| 10/18/1989 | CN1036349A Combined multifunction hammer shaft of forging hammer |
| 09/26/1989 | CA1260414A1 Integral joint forming of work-hardenable high alloy tubing |
| 08/30/1989 | EP0110918B1 Method and apparatus for making steering rack bars |
| 08/16/1989 | CN1034686A Butt ramming hammer with several power heads |
| 07/18/1989 | US4848190 Apparatus for the automatic manufacture of a punch having a sharp cutting edge |
| 07/12/1989 | EP0323607A2 Longitudinal forging machine for forging round or sharp-edged bars |
| 07/12/1989 | CN2040817U Pneumatic hammer air distributing valve |
| 06/07/1989 | EP0318607A2 Device for the automatic manufacture of a cutting die having a sharp cutting edge |
| 05/23/1989 | US4831864 Forging machine |
| 05/10/1989 | EP0315543A1 Impact press with toggle lever escapement |
| 05/10/1989 | CN1032753A Multipurpose swaging machine |
| 03/21/1989 | US4813263 Forging machine |
| 02/15/1989 | CN1031035A Hammer-controlling system |
| 01/18/1989 | EP0299948A2 Method and forging machine for making composite bodies |
| 01/10/1989 | US4796456 Forging machine |
| 01/10/1989 | US4796428 Double-acting forging hammer and method |
| 01/04/1989 | EP0297312A1 Multipurpose swaging machine |
| 10/20/1988 | DE3808389A1 Hydraulic blow forging press |
| 09/07/1988 | CN87108139A Crank-operated hammer |
| 08/10/1988 | CN85109669B Press machine |
| 08/09/1988 | US4762062 Mechanical press |
| 08/09/1988 | CA1240117A1 Method for compacting alloy powder |
| 07/28/1988 | DE3738217A1 Forging machine |
| 07/20/1988 | CN87214625U Stroke-resistant, high-pressure liquid, energy-saving device for electric liquid hammer |
| 06/29/1988 | EP0272957A1 Automatic machine for tamping coal cakes to become coked |
| 06/15/1988 | CN87210027U Electronic control device for hammer |
| 06/08/1988 | CN87108045A Machine for stamping coal mixtures for coking |
| 05/31/1988 | US4747431 Integral joint forming of work-hardenable high alloy tubing |
| 05/24/1988 | US4745793 Hydraulically driven forging machine |
| 05/19/1988 | WO1988003448A1 Process and device for transmitting or supporting deformation energy |
| 03/31/1988 | DE3631741A1 Piston/cylinder unit |
| 03/23/1988 | EP0260546A2 Forging machine |
| 03/17/1988 | DE3729631A1 Forging machine |
| 02/24/1988 | CN87206699U Electric hydraulic hammer |
| 02/11/1988 | DE3640684A1 Counterblow hammer |
| 02/04/1988 | DE3623036A1 Apparatus for the automatic production of a stamping tool with a sharp cutting edge |
| 01/12/1988 | US4718263 Method of controlling output energy in a forging hammer by anticipative sensing of input parameters |
| 12/29/1987 | US4715210 Method for making steering rack bars |
| 12/15/1987 | US4712415 Method of determining stroke length of a pneumatic forging hammer using sensed peak pressure |
| 12/15/1987 | US4712405 Method of self-regulation of output energy of forging hammers using input sensed peak of lifting fluid pressure for correction |
| 12/15/1987 | US4712404 Method of self-regulating consistency of applied energy in a forging hammer employing input differential |
| 12/09/1987 | EP0248783A1 Forging apparatus for manufacturing high-density powder-metallurgical articles |
| 11/19/1987 | WO1987006869A1 Double toggle synchronous mechanism |
| 11/19/1987 | DE3709494A1 Piston rod for telescopic damper |
| 11/11/1987 | EP0132438B1 Double-acting forging hammer and method |
| 11/03/1987 | US4703644 Die apparatus having an electromagnetic drive |
| 10/28/1987 | CN87102940A Electrohydraulic forging hammer |
| 10/13/1987 | US4698992 Wobble-die forging machine |
| 09/16/1987 | EP0236589A2 Hydraulic forging machine |
| 09/15/1987 | US4693322 For stamping a workpiece |
| 09/15/1987 | US4693101 Adaptive, self-regulating forging hammer control method |
| 08/27/1987 | DE3636265C1 Liquid-outlet-securing device in the region of the piston rod guide on the pull-back cylinder of a metal-forming machine tool |
| 08/25/1987 | US4688646 Impact force shaping head |
| 08/13/1987 | DE3603666A1 Method and die for the production of the end of a flexible shaft, the end having a polygonal cross-section and being twisted over a certain length |
| 07/15/1987 | EP0228658A2 Forging machine |
| 07/09/1987 | DE3643116A1 Forging machine |
| 07/09/1987 | DE3643100A1 Forging machine |
| 07/08/1987 | EP0228030A2 Forging machine |
| 06/19/1987 | DE3544753A1 Rotary swaging machine |
| 06/09/1987 | US4671095 Method for forming work-pieces by drop forging |
| 03/31/1987 | US4653300 Adaptive, self-regulating forging hammer control system |
| 03/18/1987 | CN86201878U Strike system of a die forging hammer by means of shock damping |
| 03/17/1987 | US4649728 Integral joint forming of work-hardenable high alloy tubing |
| 02/24/1987 | US4644777 Device for grooving cylindrical workpieces |
| 12/10/1986 | CN86201875U Hydraulically driven hammer for hammer forging |
| 11/18/1986 | US4622841 Method of forming long metal tubing to tapered shape |
| 11/12/1986 | CA1213761A Swaging apparatus with timed pre-fill |
| 10/29/1986 | EP0199428A2 Manufacture of tubular members with at least one enlarged end |
| 09/09/1986 | CA1211031A1 Roll swage device |
| 09/02/1986 | US4609526 Powder metallurgy, steel tools and dies |
| 08/19/1986 | US4606217 Screw press having a shifting coupling and a continuously rotating flywheel |
| 07/30/1986 | CN85100067A Double row cam lever type multiple-ram forging hammer |
| 07/23/1986 | CN85100589A Friction press-screw-rod hammer and anvil-less screw-rod hammer |
| 06/10/1986 | CN85109669A Hydraulically operated metal working tool |
| 05/13/1986 | US4587831 Press machine |
| 05/06/1986 | CA1204005A1 Method and apparatus for making steering rack bars |
| 04/01/1986 | US4578982 Radial press for workpieces having a cylindrical exterior surface |
| 03/12/1986 | EP0173862A2 Apparatus for making grooves in work-pieces, preferably in cylindrical work pieces |
| 03/05/1986 | EP0173089A1 Mechanical press |
| 02/25/1986 | US4571982 Apparatus for making steering rack bars |
| 02/10/1986 | CN85104446A Hydro-pneumatic system for forge |
| 11/27/1985 | EP0162549A1 Method of producing high speed, tool and die steel articles |
| 09/03/1985 | US4538440 Roll swage device |
| 09/03/1985 | US4538437 Forging machine kickout drive with running adjustment |
| 07/30/1985 | EP0110918A4 Method and apparatus for making steering rack bars. |
| 06/18/1985 | US4523445 Hot working method and apparatus in the swaging working technology |
| 05/08/1985 | EP0140009A1 Radial upsetting machine for work pieces with a cylindrical surface |
| 02/12/1985 | US4498321 Method of and apparatus for forming long metal tubing stock to tapered shape |
| 02/05/1985 | US4497195 Swaging machine |
| 12/25/1984 | US4489580 Method for deforming a flat sheet metal workpiece |
| 11/27/1984 | US4484638 Liquid inertia tool |