IPC 6 English version F04F !A-F04F 11/02

F04F-F04F01102

SECTION F– MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 04

POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS (portable fire extinguishers with manually-operated pumps A 62 C 11/00, with power-driven pumps A 62 C 25/00; charging or scavenging combustion engines by pumps F 02 B; engine fuel-injection pumps F 02 M; ion pumps H 01 J 41/12; electrodynamic pumps H 02 K 44/02)

F 04 F

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 B 65 D 83/14); SIPHONS [2]

Notes

(1)

Attention is drawn to the Notes preceding class F 01.

(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.

Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped (using only negative pressure F 04 F 3/00; jet pumps F 04 F 5/00; siphons F 04 F 10/00)

using both positively and negatively pressurised fluid medium, e.g. alternating

generated by vaporising and condensing

the fluid medium acting on the surface of the liquid to be pumped (F 04 F 1/02 takes precedence)

specially adapted for raising liquids from great depths, e.g. in wells

of multiple type, e.g. with two or more units in parallel (F 04 F 1/08 takes precedence)

in series

adapted to pump specific liquids, e.g. corrosive or hot liquids

characterised by the fluid medium being suddenly pressurised, e.g. by explosion

the fluid medium being mixed with, or generated from, the liquid to be pumped

specially adapted for raising liquids from great depths, e.g. in wells

Pumps using negative pressure acting directly on the liquid to be pumped (siphons F 04 F 10/00)

Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow (diffusion pumps F 04 F 9/00; combination of jet pumps with pumps of other than jet type F 04 B; use of jet pumps for priming or boosting non-positive-displacement pumps F 04 D)

the inducing fluid being liquid

displacing elastic fluids

of rotary type

the elastic fluid being entrained in a free-falling column of liquid

displacing liquids, e.g. containing solids, or liquids and elastic fluids

of multi-stage type

the inducing fluid being elastic fluid

displacing elastic fluids

for compressing

for evacuating

of multi-stage type

displacing liquids, e.g. containing solids, or liquids and elastic fluids

of multi-stage type (F 04 F 5/28 takes precedence)

Restarting of inducing action

with axially-slidable combining nozzle

with hinged flap in combining nozzle

characterised by means for changing inducing-fluid source

characterised by using specific inducing fluid

the inducing fluid being mercury vapour

the inducing fluid being oil vapour

characterised by the input flow of inducing fluid medium being radial or tangential to output flow (cyclones B 04 C)

Component parts, details, or accessories not provided for in, or of interest apart from, groups F 04 F 5/02 to F 04 F 5/42

Arrangements of nozzles

Control

of compressing pumps

of evacuating pumps

Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type

Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein

Hydraulic rams

Diffusion pumps

of multi-stage type

in combination with fore pumps, e.g. use of isolating valves

Arrangement of vapour traps

Control

10/

Siphons

10/

Gravity-actuated siphons

11/

Other pumps (evacuating by sorption F 04 B)

11/

Pressure exchangers [3]