F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
ENGINES AND 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 to be found in the following sub-classes: F04B as a general sub-class for pumps; F04C, F04D in respect of matter peculiar to these sub-classes.

 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 belonging to this sub-class with other pumps are only classified in this sub-class if such other pumps are fore pumps of 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-positive- displacement 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]