|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

SEPARATING; MIXING

|  | B01 - B09 |
Note(s) The following notes are meant to assist in the use of this part of the classification scheme; they must not be read as modifying in any way the elaborations. In this sub-section, the separation of different materials, e.g. of different matter, size, or state, is predominantly found in the following subclasses: Fulltext... Hierarchy... Expanded...B01D Fulltext... Hierarchy... Expanded...B03B, Fulltext... Hierarchy... Expanded...B03C, Fulltext... Hierarchy... Expanded...B03D Fulltext... Hierarchy... Expanded...B04B, Fulltext... Hierarchy... Expanded...B04C, Fulltext... Hierarchy... Expanded...B07B, Fulltext... Hierarchy... Expanded...B07C. The classifying characteristics of these subclasses are: the physical state of the matter to be separated; the principle of the process used; particular kinds of apparatus. The first of these characteristics involves six different aspects, assembled in three groups: liquid/liquid or liquid/gas and gas/gas; solid/liquid or solid/gas; solid/solid. These subclasses are to be used according to the following general rules: Fulltext... Hierarchy... Expanded...B01D is the most general class as far as separation other than solids from solids is concerned. Apparatus for separating solids from solids are covered by Fulltext... Hierarchy... Expanded...B03B when the process concerned is regarded as the equivalent of "washing" in the sense of the mining art, even if such apparatus is a pneumatic one, especially pneumatic tables or jigs. Screens per se are not covered by this subclass but are classified in Fulltext... Hierarchy... Expanded...B07B, even if they are being used in a wet process. All other apparatus for the separation of solids from solids according to dry methods are classified in Fulltext... Hierarchy... Expanded...B07B. If the separation takes place as a result of the detection or measurement of some feature of the material or articles to be sorted it is classified in Fulltext... Hierarchy... Expanded...B07C. It should also be noted that the separation of isotopes of the same chemical element is covered by Fulltext... Hierarchy... Expanded...B01D 59/00, whatever process or apparatus is employed. The following scheme illustrates the classification according to these rules.

|  | B04 |
CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES

|  | B04 |
Note(s) Attention is drawn to the Notes following the subsection title "SEPARATING; MIXING" [pages 10 and 11]

|  | B04B |
CENTRIFUGES (high-speed drum mills Fulltext... Hierarchy... Expanded...B02C 19/11; domestic spin driers Fulltext... Hierarchy... Expanded...D06F; analysing, measuring or monitoring physical or chemical properties of samples during centrifuging, see the relevant subclasses for these procedures, e.g. Fulltext... Hierarchy... Expanded...G01N)

|  | B04B |
Note(s) 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.

|  | B04B 1/00 - B04B 5/00 |
Types of centrifuges; Centrifuges characterised by discharging means

|  | B04B 1/00 |
Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles

|  | B04B 1/02 |
· | without inserted separating walls

|  | B04B 1/04 |
· | with inserted separating walls

|  | B04B 1/06 |
· · | of cylindrical shape

|  | B04B 1/08 |
· · | of conical shape

|  | B04B 1/10 |
· | with discharging outlets in the plane of the maximum diameter of the bowl

|  | B04B 1/12 |
· · | with continuous discharge

|  | B04B 1/14 |
· · | with periodical discharge

|  | B04B 1/16 |
· · · | with discharging outlets controlled by the rotational speed of the bowl

|  | B04B 1/18 |
· · · · | controlled by the centrifugal force of an auxiliary liquid

|  | B04B 1/20 |
· | discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl

|  | B04B 3/00 |
Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneously sifting or filtering

|  | B04B 3/02 |
· | discharging solid particles from the bowl by means co-axial with the bowl axis and moving to and fro, i.e. push-type centrifuges

|  | B04B 3/04 |
· | discharging solid particles from the bowl by a conveying screw co-axial with the bowl axis and rotating relatively to the bowl

|  | B04B 3/06 |
· | discharging solid particles by vibrating the bowl

|  | B04B 3/08 |
· | discharging solid particles by bowl walls in the form of endless bands

|  | B04B 5/00 |
Other centrifuges

|  | B04B 5/02 |
· | Centrifuges consisting of a plurality of separate bowls rotating round an axis situated between the bowls

|  | B04B 5/04 |
· | Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers

|  | B04B 5/06 |
· | Centrifugal counter-current apparatus

|  | B04B 5/08 |
· | Centrifuges for separating predominantly gaseous mixtures

|  | B04B 5/10 |
· | Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges (Fulltext... Hierarchy... Expanded...B04B 5/12 takes precedence; magnetic or electrostatic separators Fulltext... Hierarchy... Expanded...B03C) [2]

|  | B04B 5/12 |
· | Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers

|  | B04B 7/00 - B04B 15/00 |
Elements; Accessories

|  | B04B 7/00 |
Elements of centrifuges (drives Fulltext... Hierarchy... Expanded...B04B 9/00; feeding, charging, or discharging accessories or devices Fulltext... Hierarchy... Expanded...B04B 11/00)

|  | B04B 7/02 |
· | Casings; Lids (shock absorbers, vibration dampers Fulltext... Hierarchy... Expanded...F16F)

|  | B04B 7/04 |
· · | Casings facilitating discharge

|  | B04B 7/06 |
· · | Safety devices

|  | B04B 7/08 |
· | Rotary bowls (centrifugal casting machines Fulltext... Hierarchy... Expanded...B22D)

|  | B04B 7/10 |
· · | Bowls for shaping solids

|  | B04B 7/12 |
· · | Inserts, e.g. armouring plates

|  | B04B 7/14 |
· · · | for separating walls of conical shape

|  | B04B 7/16 |
· · · | Sieves or filters (filters in general Fulltext... Hierarchy... Expanded...B01D; sieves in general Fulltext... Hierarchy... Expanded...B07B)

|  | B04B 7/18 |
· · | formed or coated with sieving or filtering elements (filters in general Fulltext... Hierarchy... Expanded...B01D; sieves in general Fulltext... Hierarchy... Expanded...B07B)

|  | B04B 9/00 |
Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls

|  | B04B 9/02 |
· | Electric motor drives

|  | B04B 9/04 |
· · | Direct drive

|  | B04B 9/06 |
· | Fluid drive

|  | B04B 9/08 |
· | Arrangement or disposition of transmission gearing

|  | B04B 9/10 |
· | Control of the drive; Speed regulating

|  | B04B 9/12 |
· | Suspending rotary bowls

|  | B04B 9/14 |
· | Balancing rotary bowls (balancing in general Fulltext... Hierarchy... Expanded...G01M)

|  | B04B 11/00 |
Feeding, charging, or discharging bowls (Fulltext... Hierarchy... Expanded...B04B 1/00, Fulltext... Hierarchy... Expanded...B04B 3/00, Fulltext... Hierarchy... Expanded...B04B 7/04 take precedence)

|  | B04B 11/02 |
· | Continuous feeding or discharging; Control arrangements therefor

|  | B04B 11/04 |
· | Periodical feeding or discharging; Control arrangements therefor

|  | B04B 11/05 |
· · | Base discharge

|  | B04B 11/06 |
· | Arrangement of distributers or collectors in centrifuges

|  | B04B 11/08 |
· | Skimmers or scrapers for discharging

|  | B04B 13/00 |
Control arrangements specially designed for centrifuges; Programme control of centrifuges (control arrangements for feed, charge, or discharge Fulltext... Hierarchy... Expanded...B04B 11/00)

|  | B04B 15/00 |
Other accessories for centrifuges

|  | B04B 15/02 |
· | for cooling, heating, or heat insulating

|  | B04B 15/04 |
· | for suppressing the formation of foam

|  | B04B 15/06 |
· | for cleaning bowls, filters, sieves, inserts, or the like

|  | B04B 15/08 |
· | for ventilating or producing a vacuum in the centrifuge

|  | B04B 15/10 |
· | for forming a filtering layer in the rotary bowl

|  | B04B 15/12 |
· | for drying or washing the separated solid particles