1. CPC Sections
  2. CPC Section B
  3. CPC Class B04
  4. CPC Subclass B04B
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
B04B
CENTRIFUGES (high-speed drum mills B02C 19/11; domestic spin driers D06F; analysing, measuring or monitoring physical or chemical properties of samples during centrifuging, see the relevant subclasses for these procedures, e.g. G01N) [2018-08]
NOTE

  • This subclass covers machines or apparatus for separating, mixing, drying, extracting, purifying, or like treating in which centrifugal effects are generated by rotary bowls or other rotors. Where such machines or apparatus involve pumping effects, such effects must be incidental or subsidiary to the treating.
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.
Types of centrifuges; Centrifuges characterised by discharging means [2013-01]
B04B 1/00
Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles [2013-01]
B04B 1/02
.
without inserted separating walls [2013-01]
B04B 1/04
.
with inserted separating walls [2013-01]
B04B 1/06
. .
of cylindrical shape [2013-01]
B04B 1/08
. .
of conical shape [2013-01]
B04B 1/10
.
with discharging outlets in the plane of the maximum diameter of the bowl {(cleaning B04B 15/06)} [2013-01]
B04B 1/12
. .
with continuous discharge [2013-01]
B04B 1/14
. .
with periodical discharge [2013-01]
B04B 1/16
. . .
with discharging outlets controlled by the rotational speed of the bowl [2013-01]
B04B 1/18
. . . .
controlled by the centrifugal force of an auxiliary liquid [2013-01]
B04B 1/20
.
discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl [2013-01]
B04B 1/2008
. .
{with an abrasion-resistant conveyor or drum} [2016-05]
B04B 1/2016
. .
{Driving control or mechanisms; Arrangement of transmission gearing} [2013-01]
B04B 2001/2025
. . .
{with drive comprising a planetary gear} [2013-01]
B04B 2001/2033
. .
{with feed accelerator inside the conveying screw} [2013-01]
B04B 2001/2041
. .
{with baffles, plates, vanes or discs attached to the conveying screw} [2013-01]
B04B 2001/205
. .
{with special construction of screw thread, e.g. segments, height} [2016-08]
B04B 2001/2058
. .
{with ribbon-type screw conveyor} [2013-01]
B04B 2001/2066
. .
{with additional disc stacks} [2013-01]
B04B 2001/2075
. .
{with means for recovering the energy of the outflowing liquid} [2013-01]
B04B 2001/2083
. .
{Configuration of liquid outlets} [2013-01]
B04B 2001/2091
. .
{Configuration of solids outlets} [2013-01]
B04B 3/00
Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering [2013-01]
B04B 3/02
.
discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges [2013-01]
B04B 3/025
. .
{with a reversible filtering device} [2013-01]
B04B 3/04
.
discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl [2013-01]
B04B 3/06
.
discharging solid particles by vibrating the bowl [2013-01]
B04B 3/08
.
discharging solid particles by bowl walls in the form of endless bands [2013-01]
B04B 5/00
Other centrifuges [2013-01]
B04B 5/005
.
{Centrifugal separators or filters for fluid circulation systems, e.g. for lubricant oil circulation systems} [2013-01]
B04B 5/02
.
Centrifuges consisting of a plurality of separate bowls rotating round an axis situated between the bowls [2013-01]
B04B 5/04
.
Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers [2013-01]
B04B 5/0407
. .
{for liquids contained in receptacles (B04B 5/0442 takes precedence)} [2013-01]
B04B 5/0414
. . .
{comprising test tubes} [2013-01]
B04B 5/0421
. . . .
{pivotably mounted} [2013-01]
B04B 5/0428
. . .
{with flexible receptacles} [2013-01]
B04B 2005/0435
. . .
{with adapters for centrifuge tubes or bags} [2013-01]
B04B 5/0442
. .
{with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation} [2013-01]
B04B 2005/045
. . .
{having annular separation channels} [2013-01]
B04B 2005/0457
. . .
{having three-dimensional spirally wound separation channels} [2013-01]
B04B 2005/0464
. . .
{with hollow or massive core in centrifuge bowl} [2013-01]
B04B 2005/0471
. . .
{with additional elutriation separation of different particles} [2013-01]
B04B 2005/0478
. . .
{with filters in the separation chamber} [2013-01]
B04B 2005/0485
. . .
{with a displaceable piston in the centrifuge chamber} [2013-01]
B04B 2005/0492
. . .
{with fluid conveying umbilicus between stationary and rotary centrifuge parts} [2013-01]
B04B 5/06
.
Centrifugal counter-current apparatus [2013-01]
B04B 5/08
.
Centrifuges for separating predominantly gaseous mixtures [2013-01]
B04B 5/10
.
Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges (B04B 5/12 takes precedence; magnetic or electrostatic separators B03C; {amassing particles by electric fields, e.g. by agglomeration B03C 3/0175}) [2013-01]
B04B 2005/105
. .
{being a grinding mill} [2013-01]
B04B 5/12
.
Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers [2013-01]
B04B 2005/125
. .
{the rotors comprising separating walls} [2013-01]
Elements; Accessories [2013-01]
B04B 7/00
Elements of centrifuges (drives B04B 9/00; feeding, charging, or discharging appurtenances or devices B04B 11/00) [2013-01]
B04B 2007/005
.
{Retaining arms for gripping the stationary part of a centrifuge bowl or hold the bowl itself} [2013-01]
B04B 7/02
.
Casings; Lids (shock absorbers, vibration dampers F16F) [2013-01]
B04B 2007/025
. .
{Lids for laboratory centrifuge rotors} [2013-01]
B04B 7/04
. .
Casings facilitating discharge [2013-01]
B04B 7/06
. .
Safety devices {; Regulating} [2017-08]
B04B 2007/065
. . .
{Devices and measures in the event of rotor fracturing, e.g. lines of weakness, stress regions} [2016-08]
B04B 7/08
.
Rotary bowls (centrifugal casting machines B22D) [2013-01]
B04B 7/085
. .
{fibre- or metal-reinforced} [2013-01]
B04B 7/10
. .
Bowls for shaping solids [2013-01]
B04B 7/12
. .
Inserts, e.g. armouring plates [2013-01]
B04B 7/14
. . .
for separating walls of conical shape [2013-01]
B04B 7/16
. . .
Sieves or filters (filters in general B01D; sieves in general B07B) [2013-01]
B04B 7/18
. .
formed or coated with sieving or filtering elements (filters in general B01D; sieves in general B07B) [2013-01]
B04B 9/00
Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls [2013-01]
B04B 9/02
.
Electric motor drives {(dynamo-electric machines associated with centrifuges H02K 7/16)} [2013-01]
B04B 9/04
. .
Direct drive [2013-01]
B04B 9/06
.
Fluid drive [2013-01]
B04B 9/08
.
Arrangement or disposition of transmission gearing {(for solid bowl screw centrifuges B04B 1/2016); Couplings; Brakes} [2013-01]
B04B 2009/085
. .
{Locking means between drive shaft and rotor} [2013-01]
B04B 9/10
.
Control of the drive; Speed regulating {(for solid bowl screw centrifuges B04B 1/2016)} [2013-01]
B04B 9/12
.
Suspending rotary bowls {; Bearings; Packings for bearings} [2017-08]
B04B 9/14
.
Balancing rotary bowls (balancing per se G01M); {Schrappers} [2013-01]
B04B 2009/143
. .
{by weight compensation with liquids} [2013-01]
B04B 9/146
. .
{Unbalance detection devices} [2013-01]
B04B 11/00
Feeding, charging, or discharging bowls (B04B 1/00, B04B 3/00, B04B 7/04 take precedence) [2013-01]
B04B 11/02
.
Continuous feeding or discharging; Control arrangements therefor [2013-01]
B04B 11/04
.
Periodical feeding or discharging; Control arrangements therefor [2013-01]
B04B 11/043
. .
{Load indication with or without control arrangements} [2013-01]
B04B 2011/046
. .
{Loading, unloading, manipulating sample containers} [2013-01]
B04B 11/05
. .
Base discharge [2013-01]
B04B 11/06
.
Arrangement of distributors or collectors in centrifuges [2013-01]
B04B 11/08
.
Skimmers or scrapers for discharging {; Regulating thereof} [2017-08]
B04B 11/082
. .
{Skimmers for discharging liquid} [2013-01]
B04B 2011/084
. .
{with cables for cake removal} [2013-01]
B04B 2011/086
. .
{with a plurality of scraper blades} [2013-01]
B04B 2011/088
. .
{with angularly and axially offset scrapers} [2013-01]
B04B 13/00
Control arrangements specially designed for centrifuges; Programme control of centrifuges (control arrangements for feed, charge, or discharge B04B 11/00) [2013-01]
B04B 13/003
.
{Rotor identification systems} [2013-01]
B04B 2013/006
.
{Interface detection or monitoring of separated components} [2013-01]
B04B 15/00
Other accessories for centrifuges [2013-01]
B04B 15/02
.
for cooling, heating, or heat insulating [2013-01]
B04B 15/04
.
for suppressing the formation of foam [2013-01]
B04B 15/06
.
for cleaning bowls, filters, sieves, inserts, or the like [2013-01]
B04B 15/08
.
for ventilating or producing a vacuum in the centrifuge [2013-01]
B04B 15/10
.
for forming a filtering layer in the rotary bowl [2013-01]
B04B 15/12
.
for drying or washing the separated solid particles [2013-01]