B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
SEPARATING AND MIXING
 B04
CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES (using centrifugal force for the separation of particles from liquids or gases, in general B01D, e.g. B01D 21/26, B01D 43/00, B01D 45/12)
 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 sub-classes for these procedures, e.g. G01N)
 B04B

Note(s)

This sub-class deals with 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.


 B04C
APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES (jet mills B02C 19/06; cyclonic type combustion apparatus F23)
 B04C

Note(s)

This sub-class deals with 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.