Skip over navigation
Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC)

CPC
COOPERATIVE PATENT CLASSIFICATION
Collapse
NON-POSITIVE DISPLACEMENT PUMPS
NOTE
-
This subclass covers non-positive-displacement pumps for liquids, for elastic fluids, or for liquids and elastic fluids whether rotary or not having pure rotation.

This subclass does not cover combinations of non-positive-displacement pumps with other pumps, which are covered by subclass F04B, except that the use of such other pumps for priming or boosting non-positive-displacement is covered by this subclass.

Attention is drawn to the Notes preceding class F01, especially as regards the definition of "pump".

Collapse
Guide Heading:
Pumping liquids, or liquids and elastic fluids, by rotary pumps( pumping liquids and elastic fluids at the same time F04D 31/00 )
Collapse
Radial-flow pumps, e.g. centrifugal pumps ; Helico-centrifugal pumps( adapted for pumping specific fluids F04D 7/00 ; priming or boosting F04D 9/00 )
F04D 1/003
.
{
Having contrarotating parts
}
F04D 1/006
.
{
double suction pumps
}
Collapse
F04D 1/02
.
having non-centrifugal stages, e.g. centripetal
F04D 1/025
. .
{
Comprising axial and raidal stages
}
F04D 1/04
.
Helico-centrifugal pumps
Collapse
F04D 1/06
.
Multi-stage pumps( F04D 1/02 , F04D 13/10 take precedence )
Collapse
F04D 1/063
. .
{
of the vertically split casing type
}
F04D 1/066
. . .
{
the casing consisting of a plurality of annuli bolted together
}
F04D 1/08
. .
the stages being situated concentrically
F04D 1/10
. .
with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side loads
F04D 1/12
.
Pumps with scoops or like paring members protruding in the fluid circulating in a bowl
F04D 1/14
.
Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis
Collapse
Axial-flow pumps( priming or boosting F04D 9/00 )
F04D 3/005
.
{
with a conventional single stage rotor
}
F04D 3/02
.
of screw type
Collapse
Pumps with circumferential or transverse flow
{
( control thereof F04D 15/005 )
}
F04D 5/001
.
{
Shear force pumps
}
Collapse
F04D 5/002
.
{
Regenerative pumps( for elastic fluids F04D 23/008 )
}
Collapse
F04D 5/003
. .
{
of multistage type
}
F04D 5/005
. . .
{
the stages being radially offset
}
F04D 5/006
. . .
{
the stages being axially offset
}
F04D 5/007
. .
{
Details of the inlet or outlet
}
F04D 5/008
. .
{
Details of the stator, e.g. channel shape
}
Collapse
Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts( F04D 11/005 , F04D 29/22 take precedence )
Collapse
F04D 7/02
.
of centrifugal type
Collapse
F04D 7/04
. .
the fluids being viscous or non-homogenous
F04D 7/045
. . .
{
with means for comminuting, mixing stirring or otherwise treating
}
Collapse
F04D 7/06
. .
the fluids being hot or corrosive, e.g. liquid metals
F04D 7/065
. . .
{
for liquid metal
}
F04D 7/08
. .
the fluids being radioactive
Collapse
Priming ; Preventing vapour lock
Collapse
F04D 9/001
.
{
Preventing vapour lock( F04D 9/041 takes precedence )
}
Collapse
F04D 9/002
. .
{
by means in the very pump( F04D 9/041 takes precedence )
}
F04D 9/003
. . .
{
separating and removing the vapour
}
Collapse
F04D 9/004
.
{
Priming of not self-priming pumps
}
F04D 9/005
. .
{
by adducting or recycling liquid( F04D 9/006 takes precedence )
}
F04D 9/006
. .
{
by venting gas or using gas valves
}
Collapse
F04D 9/007
.
{
Preventing loss of prime, siphon breakers( stopping of pumps F04D 15/02 )
}
F04D 9/008
. .
{
by means in the suction mouth, e.g. foot valves
}
F04D 9/02
.
Self-priming pumps
Collapse
F04D 9/04
.
Using priming pumps ; Using booster pumps to prevent vapour-lock
Collapse
F04D 9/041
. .
{
the priming pump having evacuating action( F04D 9/043 and F04D 9/06 take precedence )
}
F04D 9/042
. . .
{
and means for rendering its in operative
}
F04D 9/043
. .
{
the priming pump being hand operated or of the reciprocating type
}
Collapse
F04D 9/044
. .
{
Means for rendering the priming pump inoperative
}
Collapse
F04D 9/045
. . .
{
the means being liquid level sensors
}
F04D 9/046
. . . .
{
the means being floats
}
F04D 9/047
. . .
{
the means being flow sensors
}
F04D 9/048
. . .
{
the means being outlet pressure sensors
}
F04D 9/049
. . .
{
by operator interventions
}
Collapse
F04D 9/06
. .
of jet type
F04D 9/065
. . .
{
the driving fluid being a gas or vapour, e.g. exhaust of a combustion engine
}
Collapse
Other rotary non-positive-displacement pumps( pumping installations or systems F04D 13/00 )
F04D 11/005
.
{
Swash-type impeller pumps
}
Collapse
Pumping installations or systems( controlling F04D 15/00 )
Collapse
F04D 13/02
.
Units comprising pumps and their driving means( predominant aspects of the driving means, see the relevant classes for such means )
Collapse
F04D 13/021
. .
{
containing a coupling
}
Collapse
F04D 13/022
. . .
{
a coupling allowing slip, e.g. torque converter
}
F04D 13/023
. . . .
{
for reducing start torque
}
Collapse
F04D 13/024
. . .
{
a magnetic coupling
}
F04D 13/025
. . . .
{
Details of the can separating the pump and drive area
}
F04D 13/026
. . . .
{
Details of the bearings
}
F04D 13/027
. . . .
{
Details of the magnetic circuit
}
F04D 13/028
. .
{
the driving means being a planetary gear
}
Collapse
F04D 13/04
. .
the pump being fluid driven
F04D 13/043
. . .
{
the pump wheel carrying the fluid driving means
}
F04D 13/046
. . .
{
the fluid driving means being a hydraulic motor of the positive displacement type
}
Collapse
F04D 13/06
. .
the pump being electrically driven
Collapse
F04D 13/0606
. . .
{
Canned motor pumps
}
F04D 13/0613
. . . .
{
Special connection between the rotor compartments
}
F04D 13/062
. . . .
{
pressure compensation between motor- and pump- compartment
}
F04D 13/0626
. . . .
{
Details of the can
}
F04D 13/0633
. . . .
{
Details of the bearings
}
F04D 13/064
. . . .
{
Details of the magnetic circuit
}
F04D 13/0646
. . .
{
the hollow pump or motor shaft being the conduit for the working fluid
}
F04D 13/0653
. . .
{
the motor being flooded
}
F04D 13/066
. . .
{
Floating-units
}
F04D 13/0666
. . .
{
the motor being of the plane gap type
}
F04D 13/0673
. . .
{
the motor being of the inside-out type
}
F04D 13/068
. . .
{
Battery powered
}
F04D 13/0686
. . .
{
Mechanical details of the pump control unit( pump control F04D 15/00 )
}
F04D 13/0693
. . .
{
Details or arrangements of the wiring
}
Collapse
F04D 13/08
. . .
for submerged use
F04D 13/083
. . . .
{
and protected by a gas-bell
}
F04D 13/086
. . . .
{
the pump and drive motor are both submerged
}
F04D 13/10
. . . .
adapted for use in mining bore holes
Collapse
F04D 13/12
.
Combinations of two or more pumps( combinations with priming pumps or booster pumps to counteract vapour-lock F04D 9/04 )
F04D 13/14
. .
the pumps being all of centrifugal type
{
( deviation valves F04D 15/0016 )
}
F04D 13/16
.
with storage reservoirs
Collapse
Control, e.g. regulation, of pumps, pumping installations or systems
Collapse
F04D 15/0005
.
{
by using valves
}
F04D 15/0011
. .
{
by-pass valves
}
F04D 15/0016
. .
{
mixing-reversing- or deviation valves
}
F04D 15/0022
. .
{
throttling valves or valves varying the pump inlet opening or the outlet opening
}
Collapse
F04D 15/0027
.
{
Varying behaviour or the very pump( F04D 15/0055 and F04D 29/46 take precedence )
}
F04D 15/0033
. .
{
By-passing by increasing clearance between impeller and its casing
}
F04D 15/0038
. .
{
by varying the effective cross-sectional area of flow through the rotor
}
F04D 15/0044
. .
{
by introducing a gas
}
F04D 15/005
. .
{
the pumps being of the circumferential flow type
}
Collapse
F04D 15/0055
.
{
Rotors with adjustable blades
}
F04D 15/0061
. .
{
responsive to temperature
}
F04D 15/0066
.
{
by changing the speed, e.g. of the driving engine
}
F04D 15/0072
.
{
Installation or systems with two or more pumps, wherein the flow path through the stages can be changed, e.g. series-parallel
}
Collapse
F04D 15/0077
.
{
Safety measures( F04D 15/02 takes precedence )
}
F04D 15/0083
. .
{
Protection against sudden pressure change, e.g. check valves
}
F04D 15/0088
.
{
Testing machines
}
F04D 15/0094
.
{
Indicators of rotational movement
}
Collapse
F04D 15/02
.
Stopping of pumps, or operating valves, on occurrence of unwanted conditions
Collapse
F04D 15/0209
. .
{
responsive to a condition of the working fluid( F04D 15/029 takes precedence )
}
Collapse
F04D 15/0218
. . .
{
the condition being a liquid level or a lack of liquid supply
}
F04D 15/0227
. . . .
{
Lack of liquid level being detected using a flow transducer
}
F04D 15/0236
. . . .
{
Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption
}
Collapse
F04D 15/0245
. .
{
responsive to a condition of the pump
}
F04D 15/0254
. . .
{
the condition being speed or load
}
F04D 15/0263
. . .
{
the condition being temperature, ingress of humidity or leakage
}
F04D 15/0272
. . .
{
the condition being wear or a position
}
F04D 15/0281
. .
{
responsive to a condition not otherwise provided for
}
F04D 15/029
. .
{
for pumps operating in parallel
}
Collapse
Guide Heading:
Pumping elastic fluids by rotary pumps
Collapse
Radial-flow pumps e.g. centrifugal pumps ; Helico-centrifugal pumps( F04D 21/00 takes precedence )
Collapse
F04D 17/02
.
having non-centrifugal stages, e.g. centripetal
F04D 17/025
. .
{
comprising axial flow and radial flow stages
}
F04D 17/04
. .
of transverse-flow type
F04D 17/06
.
Helico-centrifugal pumps
Collapse
F04D 17/08
.
Centrifugal pumps
Collapse
F04D 17/10
. .
for compressing or evacuating
F04D 17/105
. . .
{
with double suction
}
Collapse
F04D 17/12
. . .
Multi-stage pumps
Collapse
F04D 17/122
. . . .
{
the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
}
F04D 17/125
. . . . .
{
the casing being vertically split
}
F04D 17/127
. . . .
{
with radially spaced stages, e.g. for contrarotating type
}
F04D 17/14
. . . .
with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads,( surge control F04D 27/02 )
Collapse
F04D 17/16
. .
for displacing without appreciable compression
F04D 17/161
. . .
{
Shear force pumps
}
F04D 17/162
. . .
{
Double suction pumps
}
F04D 17/164
. . .
{
Multi-stage fans, e.g. for vacuum cleaners
}
F04D 17/165
. . .
{
Axial entry and discharge
}
F04D 17/167
. . .
{
Operating by means of fibrous or porous elements( suction filters F04D 29/701 ); e.g. with sponge rotors
}
F04D 17/168
. . .
{
Pumps specially adapted to produce a vacuum
}
F04D 17/18
. .
characterised by use of centrifugal force of liquids entrained in pumps
{
e.g. by means of an auxiliary liquid; fluid ring compressors F04C 19/00
}
Collapse
Axial-flow pumps( F04D 21/00 takes precedence );
{
pump comprising axial flow and radial flow stages F04D 17/025
}
Collapse
F04D 19/002
.
{
Axial flow fans
}
F04D 19/005
. .
{
reversible fans
}
F04D 19/007
.
{
multistage fans
}
Collapse
F04D 19/02
.
Multi-stage pumps
F04D 19/022
. .
{
with concentric rows of vanes;
}
F04D 19/024
. .
{
with contrarotating parts
}
F04D 19/026
. .
{
with a plurality of shafts rotating at different speeds( F04D 19/022 takes precedence )
}
F04D 19/028
. .
{
Layout of fluid flow through the stages
}
Collapse
F04D 19/04
. .
specially adapted to the production of a high vacuum, e.g. molecular pumps
F04D 19/042
. . .
{
Turbomolecular vacuum pumps
}
F04D 19/044
. . .
{
Holweck-type pumps
}
F04D 19/046
. . .
{
Combinations of two or more different types of pumps
}
F04D 19/048
. . .
{
comprising magnetic bearings
}
Pump involving supersonic speed of pumped fluids
Collapse
Other rotary non-positive-displacement pumps( pumping installations or systems F04D 25/00 )
Collapse
F04D 23/001
.
{
Pumps adapted for conveying materials or for handling specific elastic fluids
}
F04D 23/003
. .
{
of radial-flow type
}
F04D 23/005
. .
{
of axial-flow type
}
F04D 23/006
.
{
Creating a pulsating flow
}
F04D 23/008
.
{
Regenerative pumps( for liquids or for liquids and elastic fluids F04D 5/002 )
}
Collapse
Pumping installations or systems( controlling F04D 27/00 )
Collapse
F04D 25/02
.
Units comprising pumps and their driving means( predominant aspect of the driving means, see the relevant classes for such means )
F04D 25/022
. .
{
comprising a yielding coupling, e.g. hydraulic( a magnetic coupling F04D 25/026 )
}
F04D 25/024
. .
{
the driving means being assisted by a power recovery turbine
}
F04D 25/026
. .
{
with a magnetic coupling
}
F04D 25/028
. .
{
the driving means being a planetary gear
}
Collapse
F04D 25/04
. .
the pump being fluid-driven
{
( pumps driven by exhaust gases F02B 37/00 , F02B 39/00 ; turbochargers F02C 6/12 )
}
F04D 25/045
. . .
{
the pump wheel carrying the fluid driving means, e.g. turbine blades
}
Collapse
F04D 25/06
. .
the pump being electrically driven( F04D 25/08 takes precedence )
Collapse
F04D 25/0606
. . .
{
the electric motor being specially adapted for integration in the pump
}
Collapse
F04D 25/0613
. . . .
{
the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
}
F04D 25/062
. . . . .
{
Details of the bearings
}
F04D 25/0626
. . . . .
{
Details of the lubrication
}
F04D 25/0633
. . . . .
{
Details of the magnetic circuit
}
F04D 25/064
. . . . .
{
Details of the rotor
}
F04D 25/0646
. . . . .
{
Details of the stator
}
F04D 25/0653
. . . .
{
the motor having a plane air gap, e.g. disc-type
}
F04D 25/066
. . . .
{
Linear Motors
}
F04D 25/0666
. . . .
{
a sensor is integrated into the pump/motor design
}
F04D 25/0673
. . .
{
Battery powered
}
F04D 25/068
. . .
{
Mechanical details of the pump control unit( pump control details F04D 27/00 )
}
F04D 25/0686
. . .
{
specially adapted for submerged use
}
F04D 25/0693
. . .
{
Details or arrangements of the wiring
}
Collapse
F04D 25/08
. .
the working fluid being air, e.g. for ventilation
F04D 25/082
. . .
{
the unit having provision for cooling the motor
}
Collapse
F04D 25/084
. . .
{
hand fans
}
F04D 25/086
. . . .
{
hand operated
}
F04D 25/088
. . .
{
Ceiling fans
}
Collapse
F04D 25/10
. . .
the unit having provisions for automatically changing direction of output air
F04D 25/105
. . . .
{
by changing rotor axis direction, e.g. oscillating fans( interconnecting rotary motion and oscillating motion F16H )
}
Collapse
F04D 25/12
. . .
the unit being adapted for mounting in apertures
F04D 25/14
. . . .
and having shutters, e.g. automatically closed when not in use
Collapse
F04D 25/16
.
Combinations of two or more pumps
{
Producing two or more separate gas flows
}
F04D 25/163
. .
{
driven by a common gearing arrangement
}
F04D 25/166
. .
{
using fans
}
Collapse
Control, e.g. regulation, of pumps, pumping installations or systems
WARNING
-
This group is not complete pending a reorganisation. See also group F04D 27/02 which covers also control in general not focussing on surge control

F04D 27/001
.
{
Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
}
F04D 27/002
.
{
by varying geometry within the pumps, e.g. by adjusting vanes
}
WARNING
-
This group is not complete pending a reorganisation. See also group F04D27/02C

F04D 27/003
.
{
by throttling( F04D 27/002 takes precedence )
}
WARNING
-
This group is not complete pending a reorganisation. See also group F04D 27/02 D)

F04D 27/004
.
{
by varying driving speed
}
WARNING
-
This group is not complete pending a reorganisation. See also group F04D27/02F

F04D 27/005
.
{
by changing flow path between different stages or between a plurality of compressors; Load distribution between compressors
}
WARNING
-
This group is not complete pending a reorganisation. See also group F04D 27/02 G]

F04D 27/006
.
{
by influencing fluid temperatures
}
WARNING
-
This group is not complete pending a reorganisation. See also group F04D27/02K

F04D 27/007
.
{
Conjoint control of two or more different functions
}
WARNING
-
This group is not complete pending a reorganisation. See also group F04D27/02L

F04D 27/008
.
{
Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
}
WARNING
-
This group is not complete pending a reorganisation. See also group F04D 27/0292

F04D 27/009
.
{
by bleeding, by passing or recycling fluid
}
WARNING
-
This group is not complete pending a reorganisation. See also group F04D27/02B

Collapse
F04D 27/02
.
Surge control
{
( surge detection F04D 27/001 )
}
Collapse
F04D 27/0207
. .
{
by bleeding, bypassing or recycling fluids
}
( influencing the boundary layer by an uncontrolled bleeding of the working fluid F04D 29/681 )
F04D 27/0215
. . .
{
Arrangements therefor, e.g. bleed or by-pass valves
}
F04D 27/0223
. . .
{
Control schemes therefor
}
F04D 27/023
. . .
{
Details or means for fluid extraction
}
F04D 27/0238
. . .
{
Details or means for fluid reinjection
}
F04D 27/0246
. .
{
by varying geometry within the pumps, e.g. by adjusting vanes
}
F04D 27/0253
. .
{
by throttling( F04D 27/0246 takes precedence )
}
F04D 27/0261
. .
{
by varying driving speed
}
F04D 27/0269
. .
{
by changing flow path between different stages or between a plurality of compressors; load distribution between compressors
}
F04D 27/0276
. .
{
by influencing fluid temperature
}
F04D 27/0284
. .
{
Conjoint control of two or more different functions
}
F04D 27/0292
. .
{
Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
}
Collapse
Details, component parts, or accessories( machine elements in general F16 )
F04D 29/002
.
{
especially adapted for elastic fluid pumps
}
F04D 29/005
.
{
Decorative aspects, i.e. features which have no effect on the functioning of the pump
}
F04D 29/007
.
{
especially adapted for liquid pumps
}
Collapse
F04D 29/02
.
Selection of particular materials( for handling specific liquids F04D 7/00
{
F04D 23/001
}
)
F04D 29/023
. .
{
especially adapted for elastic fluid pumps
}
F04D 29/026
. .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/04
.
Shafts or bearings, or assemblies thereof( specially adapted for elastic fluid pumps F04D 29/05 )
F04D 29/0405
. .
{
joining shafts, e.g. rigid couplings, quill shafts
}
{
WARNING: The group F04D 29/0405 is no longer used for the classification of new documents as from July 1st, 2007. The backlog of this group is being continuously reclassified to F04D 29/044 and F04D 29/054
}
Collapse
F04D 29/041
. .
Axial thrust balancing
F04D 29/0413
. . .
{
hydrostatic; hydrodynamic thrust bearings
}
F04D 29/0416
. . .
{
balancing pistons
}
F04D 29/042
. .
Axially shiftable rotors F04D 29/041 takes precedence
{
control by creating a by-pass F04D 15/0027
}
Collapse
F04D 29/043
. .
Shafts
F04D 29/044
. . .
Arrangements for joining or assembling shafts
Collapse
F04D 29/046
. .
Bearings
F04D 29/0462
. . .
{
Bearing cartridges
}
F04D 29/0465
. . .
{
Ceramic bearing designs
}
F04D 29/0467
. . .
{
Spherical bearings
}
Collapse
F04D 29/047
. . .
hydrostatic ; hydrodynamic
F04D 29/0473
. . . .
{
for radial pumps
}
F04D 29/0476
. . . .
{
for axial pumps
}
F04D 29/048
. . .
magnetic ; electromagnetic
F04D 29/049
. . .
Roller bearings
Collapse
F04D 29/05
.
Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
Collapse
F04D 29/051
. .
Axial thrust balancing
F04D 29/0513
. . .
{
hydrostatic; hydrodynamic thrust bearings
}
F04D 29/0516
. . .
{
balancing pistons
}
F04D 29/052
. .
Axially shiftable rotors F04D 29/051 takes precedence
{
control by creating a by-pass F04D 27/0246
}
Collapse
F04D 29/053
. .
Shafts
F04D 29/054
. . .
Arrangements for joining or assembling shafts
Collapse
F04D 29/056
. .
Bearings
F04D 29/0563
. . .
{
Bearings cartridges
}
F04D 29/0566
. . .
{
Ceramic bearing designs
}
F04D 29/057
. . .
hydrostatic ; hydrodynamic
F04D 29/058
. . .
magnetic ; electromagnetic
F04D 29/059
. . .
Roller bearings
Collapse
F04D 29/06
.
Lubrication
{
( F04D 13/0606 , F04D 13/0646 , F04D 13/0653 take precedence )
}
F04D 29/061
. .
{
especially adapted for liquid pumps
}
F04D 29/063
. .
especially adapted for elastic fluid pumps
Collapse
F04D 29/08
.
Sealings
F04D 29/083
. .
{
especially adapted for elastic fluid pumps
}
F04D 29/086
. .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/10
. .
Shaft sealings
Collapse
F04D 29/102
. . .
{
especially adapted for elastic fluid pumps
}
F04D 29/104
. . . .
{
the sealing fluid being other than the working fluid or being the working fluid treated
}
Collapse
F04D 29/106
. . .
{
especially adapted for liquid pumps
}
F04D 29/108
. . . .
{
the sealing fluid being other than the working liquid or being the working liquid treated
}
Collapse
F04D 29/12
. . .
using sealing-rings
Collapse
F04D 29/122
. . . .
{
especially adapted for elastic fluid pumps
}
F04D 29/124
. . . . .
{
with special means for adducting cooling or sealing fluid
}
Collapse
F04D 29/126
. . . .
{
especially adapted for liquid pumps
}
F04D 29/128
. . . . .
{
with special means for adducting cooling or sealing fluid
}
Collapse
F04D 29/14
. . .
operative only when pump is inoperative
F04D 29/143
. . . .
{
especially adapted for elastic fluid pumps
}
F04D 29/146
. . . .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/16
. .
between pressure and suction sides
Collapse
F04D 29/161
. . .
{
especially adapted for elastic fluid pumps
}
F04D 29/162
. . . .
{
of a centrifugal flow wheel
}
F04D 29/164
. . . .
{
of an axial flow wheel
}
Collapse
F04D 29/165
. . .
{
especially adapted for liquid pumps
}
F04D 29/167
. . . .
{
of a centrifugal flow wheel
}
F04D 29/168
. . . .
{
of an axial flow wheel
}
Collapse
F04D 29/18
.
Rotors( specially for elastic fluids F04D 29/26 )
Collapse
F04D 29/181
. .
{
Axial flow rotors( F04D 29/185 take precedence )
}
F04D 29/183
. . .
{
Semi axial flow rotors
}
F04D 29/185
. .
{
Rotors consisting of a plurality of wheels
}
F04D 29/186
. .
{
Shaftless rotors( F04D 13/024 takes precedence )
}
F04D 29/188
. .
{
specially for regenerative pumps
}
F04D 29/20
. .
Mounting rotors on shafts
Collapse
F04D 29/22
. .
specially for centrifugal pumps
Collapse
F04D 29/2205
. . .
{
Conventional flow pattern( F04D 29/18 takes precedence )
}
F04D 29/2211
. . . .
{
More than one set of flow passages
}
F04D 29/2216
. . . .
{
Shape, geometry( F04D 29/2211 takes precedence )
}
Collapse
F04D 29/2222
. . . .
{
Construction and assembly( F04D 29/2211 takes precedence )
}
F04D 29/2227
. . . . .
{
for special materials
}
F04D 29/2233
. . . . .
{
entirely open or stamped from one sheet
}
Collapse
F04D 29/2238
. . .
{
Special flow patterns( F04D 11/005 takes precedence )
}
F04D 29/2244
. . . .
{
Free vortex
}
F04D 29/225
. . . .
{
Channel wheels, e.g. one blade or one flow channel
}
F04D 29/2255
. . . .
{
flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect
}
Collapse
F04D 29/2261
. . .
{
with special measures
}
F04D 29/2266
. . . .
{
for sealing or thrust balance( F04D 29/04 and F04D 29/16 take precedence )
}
F04D 29/2272
. . . .
{
for influencing flow or boundary layer
}
F04D 29/2277
. . . .
{
for increasing NPSH or dealing with liquids near boiling-point
}
F04D 29/2283
. . . .
{
for reverse pumping action
}
F04D 29/2288
. . . .
{
for comminuting, mixing or separating
}
F04D 29/2294
. . . .
{
for protection, e.g. against abrasion
}
Collapse
F04D 29/24
. . .
Vanes
Collapse
F04D 29/242
. . . .
{
Geometry, shape
}
F04D 29/245
. . . . .
{
for special effects
}
F04D 29/247
. . . .
{
elastic or self-adjusting
}
Collapse
F04D 29/26
.
Rotors specially for elastic fluids
F04D 29/263
. .
{
mounting fan or blower rotors on shafts
}
F04D 29/266
. .
{
mounting compressor rotors on shafts
}
Collapse
F04D 29/28
. .
for centrifugal or helico-centrifugal pumps
{
for radial-flow or helico-centrifugal pumps
}
Collapse
F04D 29/281
. . .
{
for fans or blowers
}
Collapse
F04D 29/282
. . . .
{
the leading edge of each vane being substantially parallel to the rotation axis
}
F04D 29/283
. . . . .
{
rotors of the squirrel-cage type
}
Collapse
F04D 29/284
. . .
{
for compressors
}
F04D 29/285
. . . .
{
the compressor wheel comprising a pair of rotatable bladed hub portions axially aligned and clamped together
}
F04D 29/286
. . . .
{
multi-stage rotors
}
F04D 29/287
. . .
{
with adjusting means
}
F04D 29/288
. . .
{
Part of the wheel having an ejecting effect e.g. being bladeless diffuser
}
F04D 29/289
. . .
{
having provision against erosion or for dust-separation
}
Collapse
F04D 29/30
. . .
Vanes
F04D 29/305
. . . .
{
Flexible vanes
}
Collapse
F04D 29/32
. .
for axial flow pumps
{
multistage rotors F01D 5/00
}
Collapse
F04D 29/321
. . .
{
for axial flow compressors
}
Collapse
F04D 29/322
. . . .
{
blade mountings( F01D 5/30 takes precedence )
}
F04D 29/323
. . . . .
{
adjustable
}
F04D 29/324
. . . .
{
blades( F01D 5/282 takes precedence )
}
Collapse
F04D 29/325
. . .
{
for axial flow fans( blade mountings F04D 29/34 , blades F04D 29/38 )
}
F04D 29/326
. . . .
{
comprising a rotating shroud
}
F04D 29/327
. . . .
{
with non identical blades
}
F04D 29/328
. . . .
{
with unequal distribution of blades around the hub
}
F04D 29/329
. . . .
{
Details of the hub
}
Collapse
F04D 29/34
. . .
Blade mountings
{
for axial flow compressors F04D 29/322
}
Collapse
F04D 29/36
. . . .
adjustable
{
flexible blades F04D 29/382
}
Collapse
F04D 29/362
. . . . .
{
during rotation
}
F04D 29/364
. . . . . .
{
The blades having only a predetermined number of possible positions
}
F04D 29/366
. . . . . .
{
Adjustment by interaction of inertion and lift
}
F04D 29/368
. . . . . .
{
Adjustment by differences of temperature
}
Collapse
F04D 29/38
. . .
Blades
{
( for axial flow compressors F04D 29/324 )
}
F04D 29/382
. . . .
{
Flexible blades
}
Collapse
F04D 29/384
. . . .
{
characterised by form
}
F04D 29/386
. . . . .
{
Skewed blades
}
F04D 29/388
. . . .
{
characterised by construction
}
Collapse
F04D 29/40
.
Casings ; Connections of working fluid
{
bleed or by-pass valves F04D 15/0011 , F04D 27/0215
}
F04D 29/403
. .
{
especially adapted for elastic fluid pumps
}
F04D 29/406
. .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/42
. .
for radial or helico-centrifugal pumps
Collapse
F04D 29/4206
. . .
{
especially adapted for elastic fluid pumps
}
F04D 29/4213
. . . .
{
suction ports
}
F04D 29/422
. . . .
{
Discharge tongues( F04D 17/04 takes precedence )
}
Collapse
F04D 29/4226
. . . .
{
Fan casings
}
F04D 29/4233
. . . . .
{
with volutes extending mainly in axial or radially inward direction
}
F04D 29/424
. . . . .
{
Double entry casings
}
F04D 29/4246
. . . . .
{
comprising more than one outlet
}
F04D 29/4253
. . . . .
{
with axial entry and discharge
}
Collapse
F04D 29/426
. . .
{
especially adapted for liquid pumps
}
F04D 29/4266
. . . .
{
made of sheet metal
}
F04D 29/4273
. . . .
{
suction eyes
}
F04D 29/428
. . . .
{
Discharge tongues( F04D 17/04 takes precedence )
}
F04D 29/4286
. . . .
{
inside lining e.g. rubber
}
F04D 29/4293
. . . .
{
Details of fluid inlet or outlet
}
Collapse
F04D 29/44
. . .
Fluid-guiding means, e.g. diffusers
Collapse
F04D 29/441
. . . .
{
especially adapted for elastic fluid pumps
}
F04D 29/442
. . . . .
{
rotating diffusers
}
F04D 29/444
. . . . .
{
Bladed diffusers
}
Collapse
F04D 29/445
. . . .
{
especially adapted for liquid pumps
}
F04D 29/447
. . . . .
{
rotating diffusers
}
F04D 29/448
. . . . .
{
bladed diffusers
}
Collapse
F04D 29/46
. . . .
adjustable
Collapse
F04D 29/462
. . . . .
{
especially adapted for elastic fluid pumps
}
F04D 29/464
. . . . . .
{
adjusting flow cross-section, otherwise than by using adjustable stator blades
}
Collapse
F04D 29/466
. . . . .
{
especially adapted for liquid fluid pumps
}
F04D 29/468
. . . . . .
{
adjusting flow cross-section, otherwise than by using adjustable stator blades
}
Collapse
F04D 29/48
. . . . .
for unidirectional fluid flow in reversible pumps
{
rotors for reverse action F04D 29/2283
}
F04D 29/483
. . . . . .
{
especially adapted for elastic fluid pumps
}
F04D 29/486
. . . . . .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/50
. . . . .
for reversing fluid flow
{
rotors for reverse action F04D 29/2283
}
F04D 29/503
. . . . . .
{
especially adapted for elastic fluid pumps
}
F04D 29/506
. . . . . .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/52
. .
for axial pumps
Collapse
F04D 29/522
. . .
{
especially adapted for elastic fluid pumps
}
F04D 29/524
. . . .
{
shiftable members for obturating part of the flow path
}
F04D 29/526
. . . .
{
Details of the casing section radially opposing blade tips( ducts F04D 29/545 )
}
F04D 29/528
. . .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/54
. . .
Fluid-guiding means, e.g. diffusers
Collapse
F04D 29/541
. . . .
{
Specially adapted for elastic fluid pumps( F04D 29/56 takes precedence )
}
Collapse
F04D 29/542
. . . . .
{
Bladed diffusers( fixing blades to stators F01D 9/042 )
}
F04D 29/544
. . . . . .
{
Blade shapes
}
Collapse
F04D 29/545
. . . . .
{
Ducts
}
F04D 29/547
. . . . . .
{
having a special shape in order to influence fluid flow
}
F04D 29/548
. . . .
{
Specially adapted for liquid pumps( F04D 29/56 takes precedence )
}
Collapse
F04D 29/56
. . . .
adjustable
F04D 29/563
. . . . .
{
specially adapted for elastic fluid pumps
}
F04D 29/566
. . . . .
{
specially adapted for liquid pumps
}
Collapse
F04D 29/58
.
Cooling( of machines or engines in general F01P ) ; Heating ; Diminishing heat transfer
{
for the motor of air-pump units F04D 25/082 ; cooling of shafts or bearings F04D 29/04
}
F04D 29/5806
. .
{
Cooling the drive system
}
F04D 29/5813
. .
{
Cooling the control unit
}
Collapse
F04D 29/582
. .
{
specially adapted for elastic fluid pumps
}
Collapse
F04D 29/5826
. . .
{
Cooling at least part of the working fluid in a heat exchanger
}
F04D 29/5833
. . . .
{
flow schemes and regulation thereto
}
F04D 29/584
. . .
{
cooling or heating the machine( F04D 29/5846 , F04D 29/5853 take precedence )
}
F04D 29/5846
. . .
{
cooling by injection
}
F04D 29/5853
. . .
{
heat insulation or conduction
}
Collapse
F04D 29/586
. .
{
specially adapted for liquid pumps
}
Collapse
F04D 29/5866
. . .
{
Cooling at last part of the working fluid in a heat exchanger
}
F04D 29/5873
. . . .
{
flow schemes and regulation thereto
}
F04D 29/588
. . .
{
cooling or heating the machine( F04D 29/5886 , F04D 29/5893 take precedence )
}
F04D 29/5886
. . .
{
cooling by injection
}
F04D 29/5893
. . .
{
heat insulation or conduction
}
Collapse
F04D 29/60
.
Mounting ; Assembling ; Disassembling
{
F04D 13/10 takes precedence
}
Collapse
F04D 29/601
. .
{
specially adapted for elastic fluid pumps
}
Collapse
F04D 29/602
. . .
{
Mounting in cavities
}
F04D 29/603
. . . .
{
means for positioning from outside
}
F04D 29/604
. . . .
{
means for removing without depressurising the cavity
}
Collapse
F04D 29/605
. .
{
specially adapted for liquid pumps
}
Collapse
F04D 29/606
. . .
{
Mounting in cavities
}
F04D 29/607
. . . .
{
means for positioning from outside
}
F04D 29/608
. . . .
{
means for removing without depressurizing the cavity
}
Collapse
F04D 29/62
. .
of radial or helico-centrifugal pumps
F04D 29/622
. . .
{
Adjusting the clearances between rotary and stationary parts
}
Collapse
F04D 29/624
. . .
{
especially adapted for elastic fluid pumps
}
F04D 29/626
. . . .
{
Mounting or removal of fans
}
F04D 29/628
. . .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/64
. .
of axial pumps
F04D 29/642
. . .
{
by adjusting the clearances between rotary and stationary parts
}
Collapse
F04D 29/644
. . .
{
especially adapted for elastic fluid pumps
}
F04D 29/646
. . . .
{
Mounting or removal of fans
}
F04D 29/648
. . .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/66
.
Combating cavitation, whirls, noise, vibration or the like( gas-flow silencers for machines or engines in general F01N ) ; Balancing( surge control F04D 27/02 )
Collapse
F04D 29/661
. .
{
especially adapted for elastic fluid pumps
}
F04D 29/662
. . .
{
Balancing of rotors( compensating unbalance G01M 1/36 )
}
Collapse
F04D 29/663
. . .
{
Sound attenuation
}
F04D 29/664
. . . .
{
by means of sound absorbing material
}
F04D 29/665
. . . .
{
by means of resonance chambers or interference
}
F04D 29/666
. . .
{
by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
}
F04D 29/667
. . .
{
by influencing the flow pattern, e.g. suppression of turbulence
}
F04D 29/668
. . .
{
damping or preventing mechanical vibrations
}
F04D 29/669
. .
{
especially adapted for liquid pumps( F04D 29/18 takes precedence )
}
Collapse
F04D 29/68
. .
by influencing boundary layers
{
( by bleeding elastic fluid F04D 27/0215 )
}
Collapse
F04D 29/681
. . .
{
especially adapted for elastic fluid pumps
}
F04D 29/682
. . . .
{
by fluid extraction
}
F04D 29/684
. . . .
{
by fluid injection
}
F04D 29/685
. . . .
{
Inducing localised fluid recirculation in the stator-rotor interface
}
F04D 29/687
. . . .
{
Plasma actuators therefore
}
F04D 29/688
. . .
{
especially adapted for liquid pumps
}
Collapse
F04D 29/70
.
Suction grids ; Strainers ; Dust separation ; Cleaning
Collapse
F04D 29/701
. .
{
especially adapted for elastic fluid pumps
}
F04D 29/703
. . .
{
specially for fans, e.g. fan guards
}
F04D 29/705
. . .
{
Adding liquids
}
F04D 29/706
. . .
{
Humidity separation
}
F04D 29/708
. .
{
specially for liquid pumps
}
Collapse
Guide Heading:
Other non-positive-displacement pumps
Pumping liquids and elastic fluids at the same time
Non-positive-displacement pumps with other than pure rotation, e.g. of oscillating type( F04D 35/00 takes precedence; hand-held fans A45B )
Pumps producing waves in liquids, i.e. wave.producers( for bath tubs A47K 3/10 )
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013