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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES (
{
centrifugal separation of water from steam B01D 45/12;
}
jet mills B02C 19/06;
{
wind sifters B07B 7/00;
}
cyclonic type combustion apparatus F23;
{
vortex burners for cyclone-type combustion apparatus F23D 1/02; cyclonic type combustion apparatus for gas turbines F23R 3/00
}
)
NOTE
-
This subclass covers apparatus for separating, mixing or like treating in which centrifugal effects are generated by free vortex flow, otherwise than by rotary bowls, rotors or curved passages.

Apparatus in which the main direction of flow follows a flat spiral;
{
so-called flat cyclones or vortex chambers
}
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Apparatus in which the axial direction of the vortex
{
(flow following a screw-thread type line)
}
remains unchanged
{
Also devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct (combined with other devices B04C 9/00)
}
B04C 2003/003
.
{
Shapes or dimensions of vortex chambers
}
B04C 2003/006
.
{
Construction of elements by which the vortex flow is generated or degenerated
}
B04C 3/02
.
with heating or cooling, e.g. quenching, means
B04C 3/04
.
Multiple arrangement thereof
{
(combined with types according to other groups, B04C 7/00)
}
B04C 3/06
.
Construction of inlets or outlets to the vortex chamber
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Apparatus in which the axial direction of the vortex is reversed
{
(combined with other devices B04C 9/00)
}
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B04C 5/02
.
Construction of inlets by which the vortex flow is generated
{
e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
}
(fluid dynamics in general F15D)
B04C 5/04
. .
Tangential inlets
B04C 5/06
. .
Axial inlets
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B04C 5/08
.
Vortex chamber constructions
B04C 5/081
. .
Shapes or dimensions
B04C 5/085
. .
with wear-resisting arrangements
B04C 5/087
. .
with flexible gas-tight walls
B04C 5/10
. .
with perforated walls
B04C 5/103
. .
Bodies or members, e.g. bulkheads, guides, in the vortex chamber (cores B04C 5/107)
B04C 5/107
. .
Cores; Devices for inducing an air-core in hydrocyclones (forming part of the outlet pipe B04C 5/13)
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B04C 5/12
.
Construction of the overflow ducting, e.g. diffusing or spiral exits
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B04C 5/13
. .
formed as a vortex finder and extending into the vortex chamber
{
(exits with bulkheads preventing reverse flow vortex B04C 3/00)
}
; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
B04C 2005/133
. . .
{
Adjustable vortex finder
}
B04C 2005/136
. . .
{
Baffles in the vortex finder
}
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B04C 5/14
.
Construction of the underflow ducting; Apex constructions; Discharge arrangements;
{
discharge through sidewall provided with a few slits or perforations (provided with a great number of slits or perforations B04C 5/10)
}
B04C 5/15
. .
with swinging flaps or revolving sluices; Sluices; Check-valves
B04C 5/16
. .
with variable-size outlets from the underflow ducting
B04C 5/18
. .
with auxiliary fluid assisting discharge
B04C 5/181
. .
Bulkheads or central bodies in the discharge opening
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B04C 5/185
. .
Dust collectors
B04C 5/187
. . .
forming an integral part of the vortex chamber
B04C 5/20
.
with heating or cooling, e.g. quenching, means
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B04C 5/22
.
with cleaning means
B04C 5/23
. .
using liquids
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.
Multiple arrangement thereof
{
(combination types according to other /00 groups, B04C 7/00)
}
B04C 5/26
. .
for series flow
B04C 5/28
. .
for parallel flow
B04C 5/30
. .
Recirculation constructions in or with cyclones which accomplish a partial recirculation of the medium, e.g. by means of conduits
Apparatus not provided for in group B04C 1/00, B04C 3/00, or B04C 5/00; Multiple arrangements not provided for in one of the groups B04C 1/00, B04C 3/00, or B04C 5/00; Combinations of apparatus covered by two or more of the groups B04C 1/00, B04C 3/00, or B04C 5/00
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Combinations with other devices, e.g. fans,
{
expansion chambers, diffusors, water locks
}
(with filters B01D 50/00)
B04C 2009/001
.
{
with means for electrostatic separation
}
B04C 2009/002
.
{
with external filters
}
B04C 2009/004
.
{
with internal filters, in the cyclone chamber or in the vortex finder
}
B04C 2009/005
.
{
with external rotors, e.g. impeller, ventilator, fan, blower, pump
}
B04C 2009/007
.
{
with internal rotors, e.g. impeller, ventilator, fan, blower, pump
}
B04C 2009/008
.
{
with injection or suction of gas or liquid into the cyclone
}
Accessories, e.g. safety or control devices, not otherwise provided for
{
e.g. regulators, valves in inlet or overflow ducting
}
(with electrostatic precipitating arrangements B03C 3/14)
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013