F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
ENGINES OR PUMPS
 F04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS (charging or scavenging combustion engines by pumps F02B; engine fuel-injection pumps F02M; ion pumps H01J 41/12; electrodynamic pumps H02K 44/02)
 F04

Note(s)

Combinations of positive-displacement and non-positive-displacement pumps are classified in subclass F04B as a general subclass for pumps, and in subclasses F04C, F04D in respect of matter specific to those subclasses.

 F04F
PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED (containers or packages with special means for dispensing liquid or semi-liquid contents by internal gaseous pressure B65D 83/14); SIPHONS  [2]
 F04F

Note(s)

  1. Attention is drawn to the Notes preceding class F01.
  2. Combinations of pumps covered by this subclass with other pumps are only classified in this subclass if such other pumps are intended for preliminary pumping for diffusion pumps.
 F04F 1/00
Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped (using only negative pressure F04F 3/00; jet pumps F04F 5/00; siphons F04F 10/00)
 F04F 1/02
·  using both positively and negatively pressurised fluid medium, e.g. alternating
 F04F 1/04
·  ·  generated by vaporising and condensing
 F04F 1/06
·  the fluid medium acting on the surface of the liquid to be pumped (F04F 1/02 takes precedence)
 F04F 1/08
·  ·  specially adapted for raising liquids from great depths, e.g. in wells
 F04F 1/10
·  ·  of multiple type, e.g. with two or more units in parallel (F04F 1/08 takes precedence)
 F04F 1/12
·  ·  ·  in series
 F04F 1/14
·  ·  adapted to pump specific liquids, e.g. corrosive or hot liquids
 F04F 1/16
·  ·  characterised by the fluid medium being suddenly pressurised, e.g. by explosion
 F04F 1/18
·  the fluid medium being mixed with, or generated from, the liquid to be pumped
 F04F 1/20
·  ·  specially adapted for raising liquids from great depths, e.g. in wells
 F04F 3/00
Pumps using negative pressure acting directly on the liquid to be pumped (siphons F04F 10/00)
 F04F 5/00
Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow (diffusion pumps F04F 9/00; combination of jet pumps with pumps of other than jet type F04B; use of jet pumps for priming or boosting non-positivedisplacement pumps F04D)
 F04F 5/02
·  the inducing fluid being liquid
 F04F 5/04
·  ·  displacing elastic fluids
 F04F 5/06
·  ·  ·  of rotary type
 F04F 5/08
·  ·  ·  the elastic fluid being entrained in a free-falling column of liquid
 F04F 5/10
·  ·  displacing liquids, e.g. containing solids, or liquids and elastic fluids
 F04F 5/12
·  ·  ·  of multi-stage type
 F04F 5/14
·  the inducing fluid being elastic fluid
 F04F 5/16
·  ·  displacing elastic fluids
 F04F 5/18
·  ·  ·  for compressing
 F04F 5/20
·  ·  ·  for evacuating
 F04F 5/22
·  ·  ·  ·  of multi-stage type
 F04F 5/24
·  ·  displacing liquids, e.g. containing solids, or liquids and elastic fluids
 F04F 5/26
·  ·  ·  of multi-stage type (F04F 5/28 takes precedence)
 F04F 5/28
·  ·  ·  Restarting of inducing action
 F04F 5/30
·  ·  ·  ·  with axially-slidable combining nozzle
 F04F 5/32
·  ·  ·  ·  with hinged flap in combining nozzle
 F04F 5/34
·  ·  characterised by means for changing inducing-fluid source
 F04F 5/36
·  ·  characterised by using specific inducing fluid
 F04F 5/38
·  ·  ·  the inducing fluid being mercury vapour
 F04F 5/40
·  ·  ·  the inducing fluid being oil vapour
 F04F 5/42
·  characterised by the input flow of inducing fluid medium being radial or tangential to output flow (cyclones B04C)
 F04F 5/44
·  Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F 5/02-F04F 5/42
 F04F 5/46
·  ·  Arrangements of nozzles
 F04F 5/48
·  ·  Control
 F04F 5/50
·  ·  ·  of compressing pumps
 F04F 5/52
·  ·  ·  of evacuating pumps
 F04F 5/54
·  Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
 F04F 7/00
Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein
 F04F 7/02
·  Hydraulic rams
 F04F 9/00
Diffusion pumps
 F04F 9/02
·  of multi-stage type
 F04F 9/04
·  in combination with fore pumps, e.g. use of isolating valves
 F04F 9/06
·  Arrangement of vapour traps
 F04F 9/08
·  Control
 F04F 10/00
Siphons
 F04F 10/02
·  Gravity-actuated siphons
 F04F 11/00
Other pumps (evacuating by sorption F04B)
 F04F 11/02
·  Pressure exchangers  [3]