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CPC
COOPERATIVE PATENT CLASSIFICATION
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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
}
NOTE
-
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.

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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)
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F04F 1/02
.
using both positively and negatively pressurised fluid medium, e.g. alternating
F04F 1/04
. .
generated by vaporising and condensing
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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
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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
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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)
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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)
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F04F 5/02
.
the including fluid being liquid
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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
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F04F 5/10
. .
displacing liquids, e.g. containing solids, or liquids and elastic fluids
F04F 5/12
. . .
of multi-stage type
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F04F 5/14
.
the inducing fluid being elastic fluid
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F04F 5/16
. .
displacing elastic fluids
F04F 5/18
. . .
for compressing
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F04F 5/20
. . .
for evacuating
F04F 5/22
. . . .
of multi-stage type
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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)
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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
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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)
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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
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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
}
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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
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F04F 7/00
Pumps displacing fluids by using inertia thereof, e.g. by generating vibration therein
F04F 7/02
.
Hydraulic rams
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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
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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
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Last Modified: 04/16/2013 4:31:16 PM