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Color Curly Brackets (indicating CPC extensions to IPC)

CPC
COOPERATIVE PATENT CLASSIFICATION
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MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS (essentially from sheet metal B21D)
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.

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Making articles shaped as bodies of revolution (rolling tubes B21B 17/00 to B21B 25/00)
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B21H 1/02
.
discs; disc wheels
B21H 1/04
. .
with rim, e.g. railways wheels
{
or pulleys
}
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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)
B21H 1/08
. .
railway wheel rims
B21H 1/10
. .
rims for pneumatic tyres
B21H 1/12
. .
rings for ball or roller bearings
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B21H 1/14
.
balls, rollers, cone rollers, or like bodies
B21H 1/16
. .
for bearings
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.
cylinders, e.g. rolled transversely
{
cross-rolling
}
. .
rolled longitudinally
.
characterised by use of rolls having circumferentially varying profile;
{
Die-rolling
}
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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)
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B21H 3/02
.
external screw-threads;
{
Making dies for thread rolling
}
B21H 3/022
. .
{
combined with rolling splines, ribs, grooves or the like, e.g. using compound dies
}
B21H 3/025
. .
{
Rolling locking screws
}
B21H 3/027
. .
{
Rolling of self-tapping screws
}
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. .
Making by means of profiled-rolls
{
or die rolls
}
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. . .
{
Thread-rolling heads
}
. . . .
{
working axially
}
. . . .
{
working radially
}
. . . .
{
working tangentially
}
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. .
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
. . .
{
Planetary thread rolling
}
B21H 3/08
.
internal screw-threads
B21H 3/10
.
twist-drills; screw-taps
.
articles with helicoidal surface (bending strip or the like helically B21D 11/06)
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Making gear wheels,
{
racks, spline shafts or worms
}
.
{
Worms
}
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.
with cylindrical outline,
{
e.g. by means of die rolls (worms B21H 5/005)
}
. .
{
Finishing gear teeth with cylindrical outline, e.g. burnishing
}
. .
{
Internally geared wheels
}
. .
{
by rolling using reciprocating flat dies, e.g. racks (B21H 5/022 takes precedence)
}
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.
bevel gears
B21H 5/045
. .
{
Finishing bevel gear teeth, e.g. burnishing
}
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Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons (nails, pins B21G 3/30)
B21H 7/002
.
{
Fasteners, rivets
}
B21H 7/005
.
{
railway sleepers or chains
}
B21H 7/007
.
{
Taper rolling, e.g. leaf springs
}
B21H 7/02
.
spades; shovels
B21H 7/04
.
hoes
B21H 7/06
.
ploughshares; axes
B21H 7/08
.
forks; rakes
{
spoons
}
B21H 7/10
.
knives; sickles; scythes
B21H 7/12
.
horse-shoes; articles of like shape, e.g. wear-resisting attachments for shoes
B21H 7/14
.
knurled articles
B21H 7/16
.
turbine blades; compressor blades; propeller blades
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.
grooved pins; Rolling grooves, e.g. oil grooves, in articles
{
(B21H 5/00 takes precedence)
}
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. .
{
Rolling annular grooves
}
. . .
{
Filet rolling, e.g. of crankshafts
}
. .
{
Rolling helical or rectilinear grooves
}
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Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects
{
e.g. checkered sheets
}
.
{
Embossing sheets or rolls
}
B21H 8/02
.
Rolls of special shape
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Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass
B21H 9/02
.
for screw-rolling machines
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013