B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
SHAPING
 B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy B22; shearing B23D; working of metal by the action of a high concentration of electric current B23H; soldering, welding, flame-cutting B23K; other working of metal B23P; punching sheet material in general B26F; processes for changing of physical properties of metals C21D, C22F; electroforming C25D 1/00)
 B21

Note(s)

  1. This class does not cover:
  2. Processes of a kind covered by this class but applied to non-metallic materials may be classified in this class if they are applicable to metal and cannot be classified fully in one other class.
 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 chains B21L; plating B23K)
 B21K

Note(s)

This subclass covers only forging, pressing, or hammering operations which are specially adapted for use in the manufacture of particular objects and which, so far as the invention is concerned, are not combined with any different metal-working operation unless the latter is a subsidiary operation performed in the same machine.

 B21K 1/00 - 
B21K 25/00
Making particular articles by forging, pressing, or hammering; Equipment therefor
 B21K 1/00
Making machine elements
 B21K 1/02
·  balls, rolls, or rollers, e.g. for bearings
 B21K 1/04
·  ball-races
 B21K 1/05
·  cages for bearings  [2]
 B21K 1/06
·  axles or shafts
 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 1/20
·  valve parts
 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 1/32
·  ·  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 1/48
·  ·  ·  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  [2]
 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
·  ·  from strip bars
 B21K 1/68
·  ·  from round or profiled bars
 B21K 1/70
·  ·  of special shape, e.g. self-locking nuts, wing nuts
 B21K 1/72
·  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 3/00
Making engine or like machine parts not covered by subgroups 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 tools 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
·  ·  rail joints
 B21K 7/12
·  parts for locomotives or vehicles, e.g. frames, underframes
 B21K 7/14
·  ·  brake rigging or brake parts  [2]
 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
·  horse-shoes; appurtenances therefor
 B21K 15/04
·  ·  caulks
 B21K 15/06
·  metal attachments for footwear, e.g. wear-resisting 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 subgroup (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 semi-finished 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, B23P 19/02)
 B21K 27/00 - 
B21K 31/00
Accessories; Auxiliary devices
 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; Arrangement 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 subclasses, e.g. H05B)
 B21K 31/00
Control devices specially adapted for positioning tool carriers