1. CPC Sections
  2. CPC Section B
  3. CPC Class B21
  4. CPC Subclass B21H
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CPC
COOPERATIVE PATENT CLASSIFICATION
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B21H
MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS (essentially from sheet metal B21D) [2018-08]
NOTE

  • This subclass covers rolling operations which are specially adapted for use in the manufacture of particular objects and which are not essentially combined with any different metal-working operation unless the latter is a subsidiary operation performed in the same machine.
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
B21H 1/00
Making articles shaped as bodies of revolution (rolling tubes B21B 17/00 - B21B 25/00) [2016-05]
B21H 1/02
.
discs; disc wheels [2013-01]
B21H 1/04
. .
with rim, e.g. railways wheels {or pulleys} [2013-01]
B21H 1/06
.
rings of restricted axial length (extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B 5/00) [2013-01]
B21H 1/08
. .
railway wheel rims [2013-01]
B21H 1/10
. .
rims for pneumatic tyres [2013-01]
B21H 1/12
. .
rings for ball or roller bearings [2013-01]
B21H 1/14
.
balls, rollers, cone rollers, or like bodies [2013-01]
B21H 1/16
. .
for bearings [2013-01]
B21H 1/18
.
cylinders, e.g. rolled transversely {cross-rolling} [2013-01]
B21H 1/20
. .
rolled longitudinally [2013-01]
B21H 1/22
.
characterised by use of rolls having circumferentially varying profile {; Die-rolling} [2017-08]
B21H 3/00
Making helical bodies or bodies having parts of helical shape (helical gears B21H 5/00; forming tubes or tube walls into helical shape B21D 11/06, B21D 15/04) [2013-01]
B21H 3/02
.
external screw-threads {; Making dies for thread rolling} [2017-08]
B21H 3/022
. .
{combined with rolling splines, ribs, grooves or the like, e.g. using compound dies} [2013-01]
B21H 3/025
. .
{Rolling locking screws} [2013-01]
B21H 3/027
. .
{Rolling of self-tapping screws} [2013-01]
B21H 3/04
. .
Making by means of profiled-rolls {or die rolls} [2013-01]
B21H 3/042
. . .
{Thread-rolling heads} [2013-01]
B21H 3/044
. . . .
{working axially} [2013-01]
B21H 3/046
. . . .
{working radially} [2013-01]
B21H 3/048
. . . .
{working tangentially} [2013-01]
B21H 3/06
. .
Making by means of profiled members other than rolls, e.g. {reciprocating flat dies or} jaws, moved longitudinally or curvilinearly with respect to each other [2013-01]
B21H 3/065
. . .
{Planetary thread rolling} [2013-01]
B21H 3/08
.
internal screw-threads [2013-01]
B21H 3/10
.
twist-drills; screw-taps [2013-01]
B21H 3/12
.
articles with helicoidal surface (bending strip or the like helically B21D 11/06) [2013-01]
B21H 5/00
Making gear wheels {, racks, spline shafts or worms} [2017-08]
B21H 5/005
.
{Worms} [2013-01]
B21H 5/02
.
with cylindrical outline {, e.g. by means of die rolls (worms B21H 5/005)} [2017-08]
B21H 5/022
. .
{Finishing gear teeth with cylindrical outline, e.g. burnishing} [2013-01]
B21H 5/025
. .
{Internally geared wheels} [2013-01]
B21H 5/027
. .
{by rolling using reciprocating flat dies, e.g. racks (B21H 5/022 takes precedence)} [2013-01]
B21H 5/04
.
bevel gears [2013-01]
B21H 5/045
. .
{Finishing bevel gear teeth, e.g. burnishing} [2013-01]
B21H 7/00
Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons (nails, pins B21G 3/30) [2013-01]
B21H 7/002
.
{Fasteners, rivets} [2013-01]
B21H 7/005
.
{railway sleepers or chains} [2013-01]
B21H 7/007
.
{Taper rolling, e.g. leaf springs} [2013-01]
B21H 7/02
.
spades; shovels [2013-01]
B21H 7/04
.
hoes [2013-01]
B21H 7/06
.
ploughshares; axes [2013-01]
B21H 7/08
.
forks; rakes {spoons} [2013-01]
B21H 7/10
.
knives; sickles; scythes [2013-01]
B21H 7/12
.
horse-shoes; articles of like shape, e.g. wear-resisting attachments for shoes [2013-01]
B21H 7/14
.
knurled articles [2013-01]
B21H 7/16
.
turbine blades; compressor blades; propeller blades [2013-01]
B21H 7/18
.
grooved pins; Rolling grooves, e.g. oil grooves, in articles {(B21H 5/00 takes precedence)} [2013-01]
B21H 7/182
. .
{Rolling annular grooves} [2013-01]
B21H 7/185
. . .
{Filet rolling, e.g. of crankshafts} [2013-01]
B21H 7/187
. .
{Rolling helical or rectilinear grooves} [2013-01]
B21H 8/00
Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects {, e.g. checkered sheets} [2016-08]
B21H 8/005
.
{Embossing sheets or rolls} [2013-01]
B21H 8/02
.
Rolls of special shape [2013-01]
B21H 9/00
Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass [2013-01]
B21H 9/02
.
for screw-rolling machines [2013-01]