B21J

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SubclassTitle
1/00 Preparing metal stock
1/02 Preparing metal stock Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough (modifying the physical properties by deformation C21D 7/00, C22F 1/00)
1/04 Preparing metal stock Shaping in the rough solely by forging or pressing
1/06 Preparing metal stock Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
3/00 Lubricating during forging or pressing (lubricating in general F16N)
5/00 Methods for forging, hammering, or pressing (for working sheet metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor
5/02 Methods for forging, hammering, or pressing (for working sheet metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor Die forging; Trimming by making use of special dies
5/04 Methods for forging, hammering, or pressing (for working sheet metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor by directly applied fluid pressure or explosive action
5/06 Methods for forging, hammering, or pressing (for working sheet metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor for performing particular operations
5/08 Methods for forging, hammering, or pressing (for working sheet metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor for performing particular operations Upsetting
5/10 Methods for forging, hammering, or pressing (for working sheet metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor for performing particular operations Piercing billets (in combination with extrusion B21C 23/00)
5/12 Methods for forging, hammering, or pressing (for working sheet metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor for performing particular operations Forming profiles on internal or external surfaces (making screw-thread by forging, pressing, or hammering B21K)
7/00 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features section H)
7/02 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features section H) Special design or construction
7/04 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features section H) Special design or construction Power hammers
7/06 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features section H) Special design or construction Drop hammers
7/08 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features section H) Special design or construction Drop hammers with rigidly-guided hammer
7/10 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features section H) Special design or construction with both drive and hammer connected to a fulcrumed lever, e.g. tail hammers
7/12 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features section H) Special design or construction with both drive and hammer connected to a fulcrumed lever, e.g. tail hammers the lever being a spring, i.e. spring hammers
7/14 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features section H) Special design or construction Forging machines working with several hammers

Showing 1 to 20 of 88 results