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MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS (making particular articles by working sheet metal without essentially removing material B21D; processing wire B21F; making pins, needles or nails B21G; making particular articles by rolling B21H; forging machines, pressing machines, hammering machines, in general B21J; making chains B21L; plating B23K)
Definition statement
This subclass covers:

Metal forging or pressing methods dedicated to the manufacture of specific products; Devices for handling, heating or cooling, controlling forging hammers or presses.

Relationship between large subject matter areas

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.

References relevant to classification in this subclass
This subclass does not cover:

Making pressed products from metal sheet, without substantially modifying the metal sheet thickness

Processing wire by forging

Making pins, needles or nails by forging

Making pressed products by rolling

Making particular pressed products by rolling

Making chains by forging

Informative references
Attention is drawn to the following places, which may be of interest for search:

General metal forging or pressing methods not dedicated to the manufacture of a specific product; Metal forging or pressing devices and furnaces

Products per se obtainable by forging, e.g. pistons, rocking arms, etc.

Making machine elements
Definition statement
This group covers:

Metal forging or pressing methods dedicated to the manufacture of machine elements.

balls, rolls, or rollers, e.g. for bearings
Definition statement
This subgroup 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:

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{of bullets}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of bullets.

Illustrative examples of subject matter classified in this group:

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ball-races { or sliding bearing races}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of ball races.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Parts of bearings

cages for bearings
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of cages for bearings.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Parts of bearings

axles or shafts
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of axles or shafts.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Shafts

Axle units

crankshafts
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of crankshafts.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Crankshafts

Camshafts

of cylindrical form
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Axle units

of specially-shaped cross-section
Definition statement
This subgroup 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:

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References relevant to classification in this group
This subgroup does not cover:

Shaping axles or shafts of special cross-section by applying fluid pressure

Informative references
Attention is drawn to the following places, which may be of interest for search:

Shafts

Axle units

fittings
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Branching pipes

parts of pipe or hose couplings
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Joints or fitting for pipes

Joints, sealing for fuel injection

pistons or plungers
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of pistons or plungers.

Illustrative examples of subject matter classified in this group:

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Informative references
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

valve parts
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of valve parts.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Rotary valves

Making branched pieces

{rocker arms}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of rocker arms.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Rocking arms or levers

poppet valves, e.g. for internal-combustion engines
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Cyclically operating valves

valve bodies; valve seats
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Valve housings

Details of fuel injectors

housings or supporting parts, e.g. axle housings, engine mountings
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Axle housings

wheels; discs
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of wheels or disks.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Vehicle disk wheels

with gear-teeth
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Gears with teeth

Making gear parts by operations not covered in any other single subclass

Making gear wheels by rolling

discs, e.g. disc wheels
Definition statement
This subgroup 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:

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wheels with spokes
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of wheels with spokes.

Illustrative examples of subject matter classified in this group:

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with blades
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of disks with blades.

Illustrative examples of subject matter classified in this group:

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Informative references
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

rims; tyres
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of rims or tyres.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Rims per se

hubs
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of hubs.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Hubs of vehicle wheels

pulleys, e.g. cable pulleys
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Pulleys per se

bolts, studs, or the like (making screw-thread B21K 1/56; making U-bolts B21K 1/74)
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of bolts studs, or the like.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Fasteners

with heads
Definition statement
This subgroup 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:

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References relevant to classification in this group
This subgroup does not cover:

Forging double ended bolts, studs or the like, i.e. with heads on both ends

{with recessed heads}
Definition statement
This subgroup 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:

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{Heading machines with an oscillating die block}
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Multi-stage forging presses

Machines working with hammers, e.g. beating in a radial direction, for forming heads
Definition statement
This subgroup covers:

Machines for forging heads of bolts studs, or the like, and working with hammers, e.g. beating in a radial direction.

References relevant to classification in this group
This subgroup does not cover:

General swaging presses, i.e. beating in radial direction

Trimming or shearing formed heads, e.g. working with dies
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Trimming by using dies in general

double-ended, e.g. with heads on both ends (forming heads B21K 1/46)
Definition statement
This subgroup 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:

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References relevant to classification in this group
This subgroup does not cover:

Forming single heads

with grooves or notches
Definition statement
This subgroup 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:

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screw-threaded elements
Definition statement
This subgroup covers:

Metal forging or pressing methods for forming screw-threads.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Forming screw threads by rolling

rivets
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of rivets.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Rivets

hollow or semi-hollow rivets
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Hollow rivets

special rivets, e.g. with electrical contacts
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Rivets

Manufacture of electric switches

nuts (making screw-thread B21K 1/56)
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of nuts.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Nuts

Pressing nuts from metal sheet without substantially modifying the metal sheet thickness

form strip bars
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of nuts from strip bars.

Illustrative examples of subject matter classified in this group:

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from round or profiled bars
Definition statement
This subgroup 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:

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of special shape, e.g. self-locking nuts, wing nuts
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of nuts of special shape, e.g. self-locking nuts, wing nuts.

{Weld nuts}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of weld nuts.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Weld nuts

{Clinch nuts}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of clinch nuts.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Nuts deforming the material of the support

Setting pierce-nuts

{Cap nuts}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of cap nuts.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Cap nuts

{Castellated nuts}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of castellated nuts.

Illustrative examples of subject matter classified in this group:

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Informative references
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

{Self-locking nuts}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of self-locking nuts.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Locking of nuts provided with locking members

{wing nuts}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of wing nuts.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Wing nuts

hooks, e.g. crane hooks, railway track spikes (making nails in general B21G)
Definition statement
This subgroup 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:

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References relevant to classification in this subgroup
This subgroup does not cover:

Making nails in general

forked members or members with two or more limbs, e.g. U-bolts, anchors
Definition statement
This subgroup 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:

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elements not mentioned in one of the preceding groups
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of machine elements not mentioned in one of the preceding groups.

References relevant to classification in this subgroup

Places to which this main group 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

{rings}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of rings.

Illustrative examples of subject matter classified in this group:

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{Coupling members for conveying mechanical motion, e.g. universal joints}
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Universal joints

Ball joints

{Connecting rods}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of connecting rods.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Connecting rods

{Toothed racks}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of toothed racks.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Rack and pinion steering gears

Racks

Making engine or like machine parts not covered by sub-groups of B21K 1/00; Making propellers or the like
Definition statement
This group 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:

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References relevant to classification in this group
This group does not cover:

Making machine elements

Making machine elements not specified elsewhere

Informative references
Attention is drawn to the following places, which may be of interest for search:

Dynamo electric machines

Air conditioning

cylinder heads
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of cylinder heads.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Cylinder heads

blades, e.g. for turbines; Upsetting of blade roots
Definition statement
This subgroup 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:

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Informative references
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

Making tools or tool parts, e.g. pliers
Definition statement
This group covers:

Metal forging or pressing methods dedicated to the manufacture of tools or tool parts, a non-limiting example being pliers.

drilling-tools or other for making or working on holes
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of drilling tools or other for making or working on holes.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Earth drilling bits

Wood boring or turning tools

Metal drilling tools

twisting-tools, e.g. drills, reamers
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Wood boring or turning tools

Metal drilling tools

Dentistry root canal files

Dressing, e.g. sharpening rock drills
Definition statement
This subgroup 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:

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drifting tools
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of drifting tools.

Remark: this subgroup is empty.

Forming drill-bit shanks
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of drill-bit shanks.

Illustrative examples of subject matter classified in this group:

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Informative references
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

other cutting tools (cutlery wares B21K 11/00)
Definition statement
This subgroup 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:

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References relevant to classification in this group
This subgroup does not cover:

Forging cutlery wares

Informative references
Attention is drawn to the following places, which may be of interest for search:

Cutting stones

Mining picks

hand hammers
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of hand hammers.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Hand hammers

tools for turning nuts
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of tool for turning nuts.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Spanners, wrenches

handles or parts therefor
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of handtools or parts therefor.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Surgical scalpels with detachable blade

Making working faces of dies, either recessed or outstanding
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Making dies by operations not covered in any other single subclass

Metal forging dies

Dies for working of plastic material

Making railway appurtenances; Making vehicle parts
Definition statement
This group covers:

Metal forging or pressing methods dedicated to the manufacture of railway appurtenances or vehicle parts.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Making machine elements

Making engine or like machine parts

parts for permanent way (spikes B21K 1/72)
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of parts for permanent way.

Illustrative examples of subject matter classified in this group:

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References relevant to classification in this group
This subgroup does not cover:

Forging spikes

switch tongues
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of switch tongues.

sleepers
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of sleepers.

base plates for rails, e.g. chairs
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of base plates for rails, e.g. chairs.

rails joints
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of rails joints.

parts for locomotives or vehicles, e.g. frames, underframes
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of parts for locomotives or vehicles, e.g. frames, underframes.

brake rigging or brake parts
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of brake rigging or brake parts.

Reconditioning railroad accessories, e.g. rails
Definition statement
This group 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Composite power rails

Composite rails

Making cutlery wares; Making garden tools or the like
Definition statement
This group 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.

knives
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of knives.

spoons; table forks
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of spoons or table forks.

scissors
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of scissors.

sickles; scythes
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of sickles or scythes.

axes; picks
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of axes or picks.

Illustrative examples of subject matter classified in this group:

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spades; shovels
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of spades or shovels.

Illustrative examples of subject matter classified in this group:

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rakes; garden forks
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of rakes or garden forks.

Illustrative examples of subject matter classified in this group:

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Making locksmiths` goods, e.g. handles for cases
Definition statement
This group covers:

Metal forging or pressing methods dedicated to the manufacture of locksmiths' goods, e.g. handles for cases.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Details of locks

hinges
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of hinges.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Construction of hinges

Making blacksmiths` goods
Definition statement
This group covers:

Metal forging or pressing methods dedicated to the manufacture of blacksmith's goods.

horseshoes; appurtenances therefor
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of horseshoes or appurtenances therefor.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Shoeing of animals

caulks
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of caulks

Illustrative examples of subject matter classified in this group:

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metal attachments for footwear, e.g. wearresisting plates
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of metal attachments for footwear, e.g. wear-resisting plates.

Making sport articles, e.g. skates
Definition statement
This group 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Golf clubs

Making articles for agricultural machinery
Definition statement
This group covers:

Metal forging or pressing methods dedicated to the manufacture of articles for agricultural machinery

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Dredging, soil-shifting

plough blades; ploughshares
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of plough blades or ploughshares.

Making hollow articles not covered by a single preceding sub-group (essentially from sheet-metal or uniform thin-walled tubes B21D, e.g. B21D 41/00, B21D 51/00)
Definition statement
This group covers:

Metal forging or pressing methods dedicated to the manufacture of hollow articles.

Producing blanks in the shape of discs or cups as semifinished articles for making hollow articles, e.g. to be deep-drawn or extruded
Definition statement
This subgroup 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:

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Shaping thin-walled hollow articles, e.g. cartridges
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of cartridges.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Cartridge ammunition

Shaping thick-walled hollow articles, e.g. projectiles
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Projectiles, missiles

Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Spark plugs

cone-shaped or bell-shaped articles, e.g. insulator caps
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Electric terminals

Shaping end portions of hollow articles
Definition statement
This subgroup 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:

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References relevant to classification in this group
This subgroup does not cover:

Making flanged articles

Informative references
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

closed or substantially-closed ends, e.g. cartridge bottoms
Definition statement
This subgroup 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:

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Informative references
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

Remodelling hollow bodies with respect to the shape of the cross-section (remodelling end portions only B21K 21/12)
Definition statement
This subgroup 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:

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References relevant to classification in this group
This subgroup does not cover:

Remodelling end-portions only

Making other articles
Definition statement
This group covers:

Metal forging or pressing methods dedicated to the manufacture of articles not provided for in the groups B21K 1/00 to B21K 21/00, especially thin articles worked in their thickness.

Illustrative examples of subject matter classified in this group:

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Source: EP0945199, WO2006008861.

References relevant to classification in this group
This group does not cover:

Making machine elements

Making other machine elements

Making other engine or machine parts

members of endless tracks, e.g. track guides, shoes (making from sheet-metal B21D)
Definition statement
This subgroup 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:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Making roller chains

Endless track vehicles

flanged articles (B21K 1/28 takes precedence; flanging tubes B21D)
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to the manufacture of flanged articles.

Illustrative examples of subject matter classified in this group:

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Relationship between large subject matter areas

Flanging tubes without substantially modifying the tube thickness

References relevant to classification in this group
This subgroup does not cover:

Making wheel, disks

Shaping end-portions of hollow articles

Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components (uniting by interference- or press-fitting B23P 11/02, B21K 19/02)
Definition statement
This group 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:

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Relationship between large subject matter areas

Interference or press-fitting

Uniting metal sheets by deformation

Press-welding by means or rolling mills

References relevant to classification in this group
This group does not cover:

Riveting

{by friction heat forging (B21J 15/027 takes precedence; friction heat forging per se B21J 5/063)}
Definition statement
This subgroup covers:

Metal forging or pressing methods dedicated to uniting components by friction heat forging.

Illustrative examples of subject matter classified in this group:

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References relevant to classification in this group
This subgroup does not cover:

Friction heat riveting

Informative references
Attention is drawn to the following places, which may be of interest for search:

Friction heat forging per se

B21J15/063

Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
Definition statement
This group covers:

Handling devices in relation to metal forging or pressing, for e.g. feeding, aligning, discharging, cutting off.

References relevant to classification in this group
This group does not cover:

Accessories for handling forging work

Feeding devices for rods, wire, or strips
Definition statement
This subgroup covers:

Devices for feeding rods, wires or strips into a forging machine.

Illustrative examples of subject matter classified in this group:

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allowing successive working steps
Definition statement
This subgroup covers:

Devices for feeding and allowing successive working steps.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Multiple die presses

Cutting-off means; Arrangements thereof
Definition statement
This subgroup covers:

Means for cutting-off forging material.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Cutting metal in general

Arrangements for heating or cooling during processing (for preparing metal stock to be forged or pressed B21J 1/06; heating equipment per se, see the appropriate classes, e.g. H05B)
Definition statement
This group covers:

Arrangements for heating or cooling during forging.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Heating processes before forging

Heating equipment per se

Control devices specially adapted for positioning tool carriers
Definition statement
This group covers:

Control devices specially adapted for positioning tool carriers.

Illustrative examples of subject matter classified in this group:

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Informative references
Attention is drawn to the following places, which may be of interest for search:

Die mountings

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013