WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

B21K　MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS, 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 chain B21L; plating B23K)

B21K 1/00 Making machine elements

B21K 1/02 ・balls, rolls, or rollers, e.g. for bearings

B21K 1/025 ・・{of bullets}

B21K 1/04 ・ball-races {or sliding bearing races}

B21K 1/05 ・cages for bearings

B21K 1/06 ・axles or shafts

B21K 1/063 ・・{hollow (hollow racks B21K 1/768)}

B21K 1/066 ・・{splined}

B21K 1/08 ・・crankshafts

B21K 1/10 ・・of cylindrical form

B21K 1/12 ・・of specially-shaped cross-section

B21K 1/14 ・fittings

B21K 1/16 ・・parts of pipe or hose couplings

B21K 1/18 ・pistons or plungers

B21K 1/185 ・・{with cooling channels}

B21K 1/20 ・valve parts

B21K 1/205 ・・{rocker arms}

B21K 1/22 ・・poppet valves, e.g. for internal-combustion engines

B21K 1/24 ・・valve bodies; valve seats

B21K 1/26 ・housings or supporting parts, e.g. axle housings, engine mountings

B21K 1/28 ・wheels; discs

B21K 1/30 ・・with gear-teeth

B21K 1/305 ・・・{helical}

B21K 1/32 ・・discs, e.g. disc wheels

B21K 1/34 ・・wheels with spokes

B21K 1/36 ・・with blades

B21K 1/38 ・・rims; tyres

B21K 1/40 ・・hubs

B21K 1/42 ・・pulleys, e.g. cable pulleys

B21K 1/44 ・bolts, studs, or the like (making screw-thread B21K 1/56; making U-bolts B21K 1/74)

B21K 1/46 ・・with heads

B21K 1/463 ・・・{with recessed heads}

B21K 1/466 ・・・{Heading machines with an oscillating die block}

B21K 1/48 ・・・Machines working with hammers, e.g. beating in a radial direction, for forming heads

B21K 1/50 ・・・Trimming or shearing formed heads, e.g. working with dies

B21K 1/52 ・・double-ended, e.g. with heads on both ends (forming heads B21K 1/46)

B21K 1/54 ・・with grooves or notches

B21K 1/56 ・screw-threaded elements

B21K 1/58 ・rivets

B21K 1/60 ・・hollow or semi-hollow rivets

B21K 1/62 ・・special rivets, e.g. with electrical contacts

B21K 1/64 ・nuts (making screw-thread B21K 1/56)

B21K 1/66 ・・form strip bars

B21K 1/68 ・・from round or profiled bars

B21K 1/70 ・・of special shape, e.g. self-locking nuts, wing nuts

B21K 1/701 ・・・{Weld nuts}

B21K 1/702 ・・・{Clinch nuts}

B21K 1/704 ・・・{Cap nuts}

B21K 1/705 ・・・{Castellated nuts}

B21K 1/707 ・・・{Self-locking nuts}

B21K 1/708 ・・・{wing nuts}

B21K 1/72 ・hooks, e.g. crane hooks, railway track spikes (making nails in general B21G)

B21K 1/74 ・forked members or members with two or more limbs, e.g. U-bolts, anchors

B21K 1/76 ・elements not mentioned in one of the preceding groups

B21K 1/761 ・・{rings}

B21K 1/762 ・・{Coupling members for conveying mechanical motion, e.g. universal joints}

B21K 1/763 ・・・{Inner elements of coupling members}

B21K 1/765 ・・・{Outer elements of coupling members}

B21K 1/766 ・・{Connecting rods}

B21K 1/767 ・・{Toothed racks}

B21K 1/768 ・・・{hollow}

B21K 3/00 Making engine or like machine parts not covered by sub-groups of B21K 1/00; Making propellers or the like

B21K 3/02 ・cylinder heads

B21K 3/04 ・blades, e.g. for turbines; Upsetting of blade roots

B21K 5/00 Making tools or tool parts, e.g. pliers

B21K 5/02 ・drilling-tools or other for making or working on holes

B21K 5/04 ・・twisting-tools, e.g. drills, reamers

B21K 5/06 ・・Dressing, e.g. sharpening rock drills

B21K 5/08 ・・drifting tools

B21K 5/10 ・・Forming drill-bit shanks

B21K 5/12 ・other cutting tools (cutlery wares B21K 11/00)

B21K 5/14 ・hand hammers

B21K 5/16 ・tools for turning nuts

B21K 5/18 ・handles or parts therefor

B21K 5/20 ・Making working faces of dies, either recessed or outstanding

B21K 7/00 Making railway appurtenances; Making vehicle parts

B21K 7/02 ・parts for permanent way (spikes B21K 1/72)

B21K 7/04 ・・switch tongues

B21K 7/06 ・・sleepers

B21K 7/08 ・・base plates for rails, e.g. chairs

B21K 7/10 ・・rails joints

B21K 7/12 ・parts for locomotives or vehicles, e.g. frames, underframes

B21K 7/14 ・・brake rigging or brake parts

B21K 9/00 Reconditioning railroad accessories, e.g. rails

B21K 11/00 Making cutlery wares; Making garden tools or the like

B21K 11/02 ・knives

B21K 11/04 ・spoons; table forks

B21K 11/06 ・scissors

B21K 11/08 ・sickles; scythes

B21K 11/10 ・axes; picks

B21K 11/12 ・spades; shovels

B21K 11/14 ・rakes; garden forks

B21K 13/00 Making locksmiths` goods, e.g. handles for cases

B21K 13/02 ・hinges

B21K 15/00 Making blacksmiths` goods

B21K 15/02 ・horseshoes; appurtenances therefor

B21K 15/04 ・・caulks

B21K 15/06 ・metal attachments for footwear, e.g. wearresisting plates

B21K 17/00 Making sport articles, e.g. skates

B21K 19/00 Making articles for agricultural machinery

B21K 19/02 ・plough blades; ploughshares

B21K 21/00 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)

B21K 21/02 ・Producing blanks in the shape of discs or cups as semifinished articles for making hollow articles, e.g. to be deep-drawn or extruded

B21K 21/04 ・Shaping thin-walled hollow articles, e.g. cartridges

B21K 21/06 ・Shaping thick-walled hollow articles, e.g. projectiles

B21K 21/08 ・Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs

B21K 21/10 ・・cone-shaped or bell-shaped articles, e.g. insulator caps

B21K 21/12 ・Shaping end portions of hollow articles

B21K 21/14 ・・closed or substantially-closed ends, e.g. cartridge bottoms

B21K 21/16 ・Remodelling hollow bodies with respect to the shape of the cross-section (remodelling end portions only B21K 21/12)

B21K 23/00 Making other articles

B21K 23/02 ・members of endless tracks, e.g. track guides, shoes (making from sheet-metal B21D)

B21K 23/04 ・flanged articles (B21K 1/28 takes precedence; flanging tubes B21D)

B21K 25/00 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)

B21K 25/005 ・{by friction heat forging (B21J 15/027 takes precedence; friction heat forging per se B21J 5/063)}

B21K 27/00 Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof

B21K 27/02 ・Feeding devices for rods, wire, or strips

B21K 27/04 ・・allowing successive working steps

B21K 27/06 ・Cutting-off means; Arrangements thereof

B21K 29/00 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)

B21K 31/00 Control devices specially adapted for positioning tool carriers