WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

F04F　PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPES {(evacuating by sorption F04B)}; SIPHONS {Conveying materials in bulk by flows of gas, liquid of foam B65G 53/00}

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 depth, 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 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 including 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 liquid 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 to F04F 5/42

F04F 5/46 ・・Arrangements of nozzles

F04F 5/461 ・・・{Adjustable nozzles}

F04F 5/462 ・・・{with provisions for cooling the fluid}

F04F 5/463 ・・・{with provisions for mixing}

F04F 5/464 ・・・{with inversion of the direction of flow}

F04F 5/465 ・・・{with supersonic flow (mixing of supersonic fluids B01F 5/04)}

F04F 5/466 ・・・{with a plurality of nozzles arranged in parallel}

F04F 5/467 ・・・{with a plurality of nozzles arranged in series}

F04F 5/468 ・・・{with provisions for priming}

F04F 5/469 ・・・{for steam engines}

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 vibration 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 13/00 Pressure exchangers

F04F 99/00 Subject matter not provided for in other groups of this subclass