CPC Definition - Subclass B21K
This place covers:
Metal forging or pressing methods dedicated to the manufacture of specific products; Devices for handling, heating or cooling, controlling forging hammers or presses.
This subclass subdivides into:
Metal forging or pressing methods dedicated to the manufacture of specific products: B21K 1/00-B21K 25/005.
Devices for handling, heating or cooling, controlling forging hammers or presses: B21K 27/00-B21K 31/00.
This place does not cover:
Attention is drawn to the following places, which may be of interest for search:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of machine elements.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of balls, rolls or rollers, e.g. for bearings.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of bullets.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of ball races.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Parts of bearings |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of cages for bearings.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Parts of bearings |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of axles or shafts.
Attention is drawn to the following places, which may be of interest for search:
Axle units | |
Shafts |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of crankshafts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Camshafts | |
Crankshafts |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of axles or shafts of cylindrical form.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Axle units |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of axles or shafts of special cross-section.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Shaping axles or shafts of special cross-section by applying fluid pressure |
Attention is drawn to the following places, which may be of interest for search:
Axle units | |
Shafts |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of fittings, e.g. lubricant fittings.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Branching pipes |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of parts of pipe or hose couplings.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Joints, sealing for fuel injection | |
Joints or fitting for pipes |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of pistons or plungers.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Making pistons by operations not covered by any other single subclass | |
Pistons in combustion engines | |
Pistons in general |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of valve parts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Making branched pieces | |
Rotary valves |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of rocker arms.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Rocking arms or levers |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of poppet valves, e.g. for internal combustion engines.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Cyclically operating valves |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of valve bodies or valve seats.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Details of fuel injectors | |
Valve housings |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of housings or supporting parts, e.g. axle housings or engine mountings.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Axle housings |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of wheels or disks with gear teeth.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Making gear wheels by rolling | |
Making gear parts by operations not covered in any other single subclass | |
Gears with teeth |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of disks, e.g. disc wheels.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of wheels with spokes.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of disks with blades.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Making turbo blades or propellers by extrusion | |
Making turbine wheels by operations not covered in any other single subclass | |
Rotor-blade aggregates |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of rims or tyres.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Rims per se |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of hubs.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Hubs of vehicle wheels |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of pulley, e.g. cable pulleys.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Pulleys per se |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of bolts studs, or the like.
Attention is drawn to the following places, which may be of interest for search:
Fasteners |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of heads on bolts studs, or the like.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Forging double ended bolts, studs or the like, i.e. with heads on both ends |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of bolts studs, or the like, with recessed heads.
Illustrative examples of subject matter classified in this group:
This place covers:
Machines for forge-heading of bolts studs, or the like, and comprising an oscillating die block.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Multi-stage forging presses |
This place covers:
Machines for forging heads of bolts studs, or the like, and working with hammers, e.g. beating in a radial direction.
This place does not cover:
General swaging presses, i.e. beating in radial direction |
This place covers:
Metal forging or pressing methods dedicated to the trimming or shearing of formed heads, e.g. with working dies.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Trimming by using dies in general |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of double-ended bolts, studs or the like, e-g- with heads on both ends.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Forming single heads |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of bolts, studs, of the like, with grooves or notches.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods for forming screw-threads.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Forming screw threads by rolling |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of rivets.
Attention is drawn to the following places, which may be of interest for search:
Rivets |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of hollow or semi-hollow rivets.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Hollow rivets |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of special rivets, e.g. with electrical contacts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Rivets | |
Manufacture of electric switches |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of nuts.
Attention is drawn to the following places, which may be of interest for search:
Pressing nuts from metal sheet without substantially modifying the metal sheet thickness | |
Nuts |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of nuts from strip bars.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of nuts from round or profiled bars.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of nuts of special shape, e.g. self-locking nuts, wing nuts.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of weld nuts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Weld nuts |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of clinch nuts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Setting pierce-nuts | |
Nuts deforming the material of the support |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of cap nuts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Cap nuts |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of castellated nuts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Locking of nuts with a member penetrating the screw-threaded surface |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of self-locking nuts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Locking of nuts provided with locking members |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of wing nuts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Wing nuts |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of hooks, e.g. crane hooks, railway track spikes.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Making nails in general |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of forked members or members with two or more limbs, e.g. U-bolts, anchors.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of machine elements not mentioned in one of the preceding groups.
Examples of places in relation to which this place is residual:
Making engine or like machine parts | |
Making tools or tool parts | |
Making railway appurtenances; vehicle parts | |
Reconditioning railroad accessories | |
Making cutlery wares; garden tools | |
Making locksmith's goods | |
Making blacksmith's goods | |
Making sport articles | |
Making articles for agricultural machinery | |
Making hollow articles not covered by a single preceding group | |
Making other articles | |
Uniting components to form integral members |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of rings.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of coupling members for conveying mechanical motion, e.g. universal joints.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Ball joints | |
Universal joints |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of connecting rods.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Connecting rods |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of toothed racks.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Rack and pinion steering gears | |
Racks |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of engine or machine parts, e.g. propellers, magnet wheel disks, scrolls for air conditioners.
Illustrative examples of subject matter classified in this group:
This place does not cover:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of cylinder heads.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Cylinder heads |
This place covers:
Metal forging, pressing or upsetting methods dedicated to the manufacture of blades, e.g. for turbines.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Making turbine or like blades by operations not covered in any other single subclass | |
Blades of non positive displacement machines |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of tools or tool parts, a non-limiting example being pliers.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of drilling tools or other for making or working on holes.
Attention is drawn to the following places, which may be of interest for search:
Metal drilling tools | |
Wood boring or turning tools | |
Earth drilling bits |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of twisting tools, e.g. drills, reamers.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Dentistry root canal files | |
Tools for drilling machines | |
Wood boring or turning tools |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of dressing, e.g. sharpening rock drills.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of drifting tools.
Remark: this subgroup is empty.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of drill-bit shanks.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Chucks and tool shanks | |
Tools or bench devices not otherwise provided for |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of other cutting tools, e.g. chisels, saw blades, chopping blades, nippers, etc.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Forging cutlery wares |
Attention is drawn to the following places, which may be of interest for search:
Cutting stones | |
Mining picks |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of tool for turning nuts.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Spanners, wrenches |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of handtools or parts therefor.
Attention is drawn to the following places, which may be of interest for search:
Surgical scalpels with detachable blade |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of working faces of dies, either recessed or outstanding.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Metal forging dies | |
Making dies by operations not covered in any other single subclass | |
Dies for working of plastic material |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of railway appurtenances or vehicle parts.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of parts for permanent way.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Forging spikes |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of switch tongues.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of sleepers.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of base plates for rails, e.g. chairs.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of rails joints.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of parts for locomotives or vehicles, e.g. frames, underframes.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of brake rigging or brake parts.
This place covers:
Metal forging or pressing methods dedicated to the reconditioning of railroad accessories, e.g. rails.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Composite power rails | |
Composite rails |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of cutlery wares or garden tools. The expression "or the like" is to be ignored.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of knives.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of spoons or table forks.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of scissors.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of sickles or scythes.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of axes or picks.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of spades or shovels.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of rakes or garden forks.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of locksmiths' goods, e.g. handles for cases.
Attention is drawn to the following places, which may be of interest for search:
Details of locks |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of hinges.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Construction of hinges |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of blacksmith's goods.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of horseshoes or appurtenances therefor.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Shoeing of animals |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of caulks
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of metal attachments for footwear, e.g. wear-resisting plates.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of sports articles, e.g. skates or golf clubs.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Golf clubs |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of articles for agricultural machinery
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Dredging, soil-shifting |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of plough blades or ploughshares.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of hollow articles.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of discs or cups as semi-finished articles.
Illustrative examples of subject matter classified in this group:
This place covers:
Metal forging or pressing methods dedicated to the manufacture of cartridges.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Cartridge ammunition |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of thick-walled hollow articles, e.g. projectiles.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Projectiles, missiles |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of hollow articles with different cross-section, e.g. nozzles, spark-plugs.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Spark plugs |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of cone-shaped or bell-shaped articles, e.g. insulator caps.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Electric terminals |
This place covers:
Metal forging or pressing methods dedicated to the shaping of end-portions of hollow articles.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Making flanged articles |
Attention is drawn to the following places, which may be of interest for search:
Shaping end portions of hollow articles without substantially modifying the workpiece thickness |
This place covers:
Metal forging or pressing methods dedicated to the shaping of closed or substantially closed end-portions of hollow articles, e.g. cartridge bottoms.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Closing end portions of hollow articles without substantially modifying the workpiece thickness |
This place covers:
Metal forging or pressing methods dedicated to the remodelling of hollow bodies with respect to the shape of their cross-section.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Remodelling end-portions only |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of articles not provided for in the groups B21K 1/00 - B21K 21/00, especially thin articles worked in their thickness.
Illustrative examples of subject matter classified in this group:
Source: EP0945199, WO2006008861.
This place covers:
Metal forging or pressing methods dedicated to the manufacture of members
of endless tracks, e.g. track guides, shoes.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Making roller chains | |
Endless track vehicles |
This place covers:
Metal forging or pressing methods dedicated to the manufacture of flanged articles.
Illustrative examples of subject matter classified in this group:
Flanging tubes without substantially modifying the tube thickness |
This place does not cover:
Making wheel, disks | |
Shaping end-portions of hollow articles |
This place covers:
Metal forging or pressing methods for uniting components in order to form integral members, with or without shaping the components.
Illustrative examples of subject matter classified in this group:
Interference or press-fitting | |
Uniting metal sheets by deformation | |
Press-welding by means or rolling mills |
This place does not cover:
Riveting |
This place covers:
Metal forging or pressing methods dedicated to uniting components by friction heat forging.
Illustrative examples of subject matter classified in this group:
This place does not cover:
Friction heat riveting |
Attention is drawn to the following places, which may be of interest for search:
Friction heat forging per se |
This place covers:
Handling devices in relation to metal forging or pressing, for e.g. feeding, aligning, discharging, cutting off.
This place does not cover:
Accessories for handling forging work |
This place covers:
Devices for feeding rods, wires or strips into a forging machine.
Illustrative examples of subject matter classified in this group:
This place covers:
Devices for feeding and allowing successive working steps.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Multiple die presses |
This place covers:
Means for cutting-off forging material.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Cutting metal in general |
This place covers:
Arrangements for heating or cooling during forging.
Illustrative examples of subject matter classified in this group:
This place covers:
Control devices specially adapted for positioning tool carriers.
Illustrative examples of subject matter classified in this group:
Attention is drawn to the following places, which may be of interest for search:
Die mountings |