F04F

PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED

evacuating by sorption F04B

SIPHONS

conveying materials in bulk by flows of gas, liquid of foam B65G53/00

Attention is drawn to the notes preceding class F01.

Combinations of pumps belonging to this subclass with other pumps are only classified in this subclass if such other pumps are fore pumps of diffusion pumps.

In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.

F04F1/00

Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using only negative pressure F04F3/00; jet pumps F04F5/00; siphons F04F10/00

F04F1/02

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

F04F1/04

generated by vaporising and condensing

F04F1/06

the fluid medium acting on the surface of the liquid to be pumped F04F1/02 takes precedence

F04F1/08

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

F04F1/10

of multiple type, e.g. with two or more units in parallel F04F1/08 takes precedence

F04F1/12

in series

F04F1/14

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

F04F1/16

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

F04F1/18

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

F04F1/20

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

F04F3/00

Pumps using negative pressure acting directly on the liquid to be pumped siphons F04F10/00

F04F5/00

Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow diffusion pumps F04F9/00; 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

F04F5/02

the inducing fluid being liquid

F04F5/04

displacing elastic fluids

F04F5/06

of rotary type

F04F5/08

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

F04F5/10

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

F04F5/12

of multi-stage type

F04F5/14

the inducing fluid being elastic fluid

F04F5/16

displacing elastic fluids

F04F5/18

for compressing

F04F5/20

for evacuating

F04F5/22

of multi-stage type

F04F5/24

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

F04F5/26

of multi-stage type F04F5/28 takes precedence

F04F5/28

Restarting of inducing action

F04F5/30

with axially-slidable combining nozzle

F04F5/32

with hinged flap in combining nozzle

F04F5/34

characterised by means for changing inducing fluid source

F04F5/36

characterised by using specific inducing fluid

F04F5/38

the inducing fluid being mercury vapour

F04F5/40

the inducing fluid being oil vapour

F04F5/42

characterised by the input flow of inducing fluid medium being radial or tangential to output flow cyclones B04C

F04F5/44

Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42

F04F5/46

Arrangements of nozzles

F04F5/461

Adjustable nozzles

F04F5/462

with provisions for cooling the fluid

F04F5/463

with provisions for mixing

F04F5/464

with inversion of the direction of flow

F04F5/465

with supersonic flow mixing of supersonic fluids B01F25/20

F04F5/466

with a plurality of nozzles arranged in parallel

F04F5/467

with a plurality of nozzles arranged in series

F04F5/468

with provisions for priming

F04F5/469

for steam engines

F04F5/48

Control

F04F5/50

of compressing pumps

F04F5/52

of evacuating pumps

F04F5/54

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

F04F7/00

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

F04F7/02

Hydraulic rams

F04F9/00

Diffusion pumps

F04F9/02

of multi-stage type

F04F9/04

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

F04F9/06

Arrangement of vapour traps

F04F9/08

Control

F04F10/00

Siphons

F04F10/02

Gravity-actuated siphons

F04F13/00

Pressure exchangers

F04F99/00

Subject matter not provided for in other groups of this subclass