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.

  1. In this sub-section, the separation of different materials, e.g. of different matter, size, or state, is predominantly found in the following subclasses:

    B01D

    B03B, B03C, B03D

    B04B, B04C

    B07B, B07C.

  2. The classifying characteristics of these subclasses are:
    1. the physical state of the matter to be separated;
    2. the principle of the process used;
    3. particular kinds of apparatus.
    The first of these characteristics involves six different aspects, assembled in three groups:
    1. liquid/liquid or liquid/gas and gas/gas;
    2. solid/liquid or solid/gas;
    3. solid/solid.
  3. These subclasses are to be used according to the following general rules:
    It should also be noted that the separation of isotopes of the same chemical element is covered by B01D 59/00, whatever process or apparatus is employed.
  4. The following scheme illustrates the classification according to these rules.

        TABLE A

        LIQUID/LIQUID

        LIQUID/GAS

        GAS/GAS

                                            Subclasses dealing with

     Operations                                 Method    Apparatus

     General                                    B01D      B01D

       by centrifugal force, using centrifuges or

       free-vortex apparatus                    B01D      B04B,

                                                            B04C

       using magnetic or electrostatic effect   B03C      B03C 

        TABLE B

        SOLID/LIQUID

        SOLID/GAS

                                            Subclasses dealing with

     Operations                                 Method    Apparatus

     General                                    B01D      B01D 

       by centrifugal force                     B01D      B01D 

       using centrifuges or free-vortex

         apparatus                              B01D      B04B,

                                                            B04C

       using magnetic or electrostatic effect   B03C      B03C

        TABLE C

        SOLID/SOLID

     Dry methods

                                             Subclasses dealing with

     Operations                                 Method    Apparatus

     General

     material in bulk                           B07B      B07B 

     Individual sorting                         B07C      B07C 

       Screening, sifting, pneumatic sorting    B07B      B07B 

         using pneumatic tables or jigs         B03B      B03B 

       by magnetic or electrostatic effect      B03C      B03C 

       by centrifugal force                     B07B      B07B 

         using centrifuges or free-vortex

         apparatus                              B07B      B04B,

                                                            B04C

     Wet methods

                                             Subclasses dealing with

     Operations                                 Method    Apparatus

     General                                    B03B      B03B 

       flotation, differential sedimentation    B03D      B03D 

       screening                                B07B      B07B

     Combinations Dry methods - wet methods     B03B 

 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].  [4]

 B04C
APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES (jet mills B02C 19/06; exhaust or silencing apparatus for machines or engines having means for removing solid constituents of exhaust, using inertial or centrifugal separators F01N 3/037; cyclonic type combustion apparatus F23)
 B04C

Note(s)

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.

 B04C 1/00
Apparatus in which the main direction of flow follows a flat spiral
 B04C 3/00
Apparatus in which the axial direction of the vortex remains unchanged
 B04C 3/02
·  with heating or cooling, e.g. quenching, means
 B04C 3/04
·  Multiple arrangement thereof
 B04C 3/06
·  Construction of inlets or outlets to the vortex chamber
 B04C 5/00
Apparatus in which the axial direction of the vortex is reversed
 B04C 5/02
·  Construction of inlets by which the vortex flow is generated (fluid dynamics in general F15D)
 B04C 5/04
·  ·  Tangential inlets
 B04C 5/06
·  ·  Axial inlets
 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)
 B04C 5/12
·  Construction of the overflow ducting, e.g. diffusing or spiral exits
 B04C 5/13
·  ·  formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
 B04C 5/14
·  Construction of the underflow ducting; Apex constructions; Discharge arrangements
 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
 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
 B04C 5/22
·  with cleaning means
 B04C 5/23
·  ·  using liquids
 B04C 5/24
·  Multiple arrangement thereof
 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
 B04C 7/00
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
 B04C 9/00
Combinations with other devices, e.g. fans (with filters B01D 50/00)
 B04C 11/00
Accessories, e.g. safety or control devices, not otherwise provided for (with electrostatic precipitating arrangements B03C 3/14)