F:	MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING ENGINES OR PUMPS
F04:	POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04D:	NON-POSITIVE DISPLACEMENT PUMPS
F04D1/00:	Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
F04D1/00B:	. Having contrarotating parts
F04D1/00C:	. double suction pumps
F04D1/02:	. having non-centrifugal stages, e.g. centripetal
F04D1/02B:	. . Comprising axial and raidal stages
F04D1/04:	. Helico-centrifugal pumps
F04D1/06:	. Multi-stage pumps
F04D1/06B:	. . of the vertically split casing type
F04D1/06B2:	. . . the casing consisting of a plurality of annuli bolted together
F04D1/08:	. . the stages being situated concentrically
F04D1/10:	. . with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side loads
F04D1/12:	. Pumps with scoops or like paring members protruding in the fluid circulating in a bowl
F04D1/14:	. Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis
F04D3/00:	Axial-flow pumps
F04D3/00B:	. with a conventional single stage rotor
F04D3/02:	. of screw type
F04D5/00:	Pumps with circumferential or transverse flow control thereof F04D15/00C6
F04D5/00B:	. Shear force pumps
F04D5/00R:	. Regenerative pumps for elastic fluids F04D23/00R
F04D5/00R2:	. . of multistage type
F04D5/00R2B:	. . . the stages being radially offset
F04D5/00R2D:	. . . the stages being axially offset
F04D5/00R4:	. . Details of the inlet or outlet
F04D5/00R6:	. . Details of the stator, e.g. channel shape
F04D7/00:	Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
F04D7/02:	. of centrifugal type
F04D7/04:	. . the fluids being viscous or non-homogenous
F04D7/04B:	. . . with means for comminuting, mixing stirring or otherwise treating
F04D7/06:	. . the fluids being hot or corrosive, e.g. liquid metals
F04D7/06B:	. . . for liquid metal
F04D7/08:	. . the fluids being radioactive
F04D9/00:	Priming; Preventing vapour lock
F04D9/00B:	. Preventing vapour lock F04D9/04B takes precedence
F04D9/00B2:	. . by means in the very pump F04D9/04B takes precedence
F04D9/00B2B:	. . . separating and removing the vapour
F04D9/00C:	. Priming of not self-priming pumps
F04D9/00C2:	. . by adducting or recycling liquid F04D9/00C3 takes precedence
F04D9/00C3:	. . by venting gas or using gas valves
F04D9/00D:	. Preventing loss of prime, siphon breakers stopping of pumps F04D15/02
F04D9/00D2:	. . by means in the suction mouth, e.g. foot valves
F04D9/02:	. Self-priming pumps
F04D9/04:	. Using priming pumps; Using booster pumps to prevent vapour-lock
F04D9/04B:	. . the priming pump having evacuating action F04D9/04C and F04D9/06 take precedence
F04D9/04B2:	. . . and means for rendering its in operative
F04D9/04C:	. . the priming pump being hand operated or of the reciprocating type
F04D9/04E:	. . Means for rendering the priming pump inoperative
F04D9/04E2:	. . . the means being liquid level sensors
F04D9/04E2B:	. . . . the means being floats
F04D9/04E4:	. . . the means being flow sensors
F04D9/04E6:	. . . the means being outlet pressure sensors
F04D9/04E8:	. . . by operator interventions
F04D9/06:	. . of jet type
F04D9/06B:	. . . the driving fluid being a gas or vapour, e.g. exhaust of a combustion engine
F04D11/00:	Other rotary non-positive-displacement pumps
F04D11/00B:	. Swash-type impeller pumps
F04D13/00:	Pumping installations or systems
F04D13/02:	. Units comprising pumps and their driving means (predominant aspects of the driving means, see the relevant classes for such means)
F04D13/02B:	. . containing a coupling
F04D13/02B2:	. . . a coupling allowing slip, e.g. torque converter
F04D13/02B2B:	. . . . for reducing start torque
F04D13/02B3:	. . . a magnetic coupling
F04D13/02B3B:	. . . . Details of the can separating the pump and drive area
F04D13/02B3D:	. . . . Details of the bearings
F04D13/02B3F:	. . . . Details of the magnetic circuit
F04D13/02C:	. . the driving means being a planetary gear
F04D13/04:	. . the pump being fluid driven
F04D13/04B:	. . . the pump wheel carrying the fluid driving means
F04D13/04C:	. . . the fluid driving means being a hydraulic motor of the positive displacement type
F04D13/06:	. . the pump being electrically driven
F04D13/06B:	. . . Canned motor pumps
F04D13/06B2:	. . . . Special connection between the rotor compartments
F04D13/06B3:	. . . . pressure compensation between motor- and pump- compartment
F04D13/06B5:	. . . . Details of the can
F04D13/06B7:	. . . . Details of the bearings
F04D13/06B9:	. . . . Details of the magnetic circuit
F04D13/06C:	. . . the hollow pump or motor shaft being the conduit for the working fluid
F04D13/06D:	. . . the motor being flooded
F04D13/06F:	. . . Floating-units
F04D13/06G:	. . . the motor being of the plane gap type
F04D13/06J:	. . . the motor being of the inside-out type
F04D13/06L:	. . . Battery powered
F04D13/06N:	. . . Mechanical details of the pump control unit pump control F04D15/00
F04D13/06W:	. . . Details or arrangements of the wiring
F04D13/08:	. . . for submerged use
F04D13/08B:	. . . . and protected by a gas-bell
F04D13/08D:	. . . . the pump and drive motor are both submerged
F04D13/10:	. . . . adapted for use in mining bore holes
F04D13/12:	. Combinations of two or more pumps
F04D13/14:	. . the pumps being all of centrifugal type deviation valves F04D15/00B3
F04D13/16:	. with storage reservoirs
F04D15/00:	Control, e.g. regulation, of pumps, pumping installations or systems
F04D15/00B:	. by using valves
F04D15/00B2:	. . by-pass valves
F04D15/00B3:	. . mixing-reversing- or deviation valves
F04D15/00B4:	. . throttling valves or valves varying the pump inlet opening or the outlet opening
F04D15/00C:	. Varying behaviour or the very pump F04D15/00D and F04D29/46 take precedence
F04D15/00C2:	. . By-passing by increasing clearance between impeller and its casing
F04D15/00C3:	. . by varying the effective cross-sectional area of flow through the rotor
F04D15/00C4:	. . by introducing a gas
F04D15/00C6:	. . the pumps being of the circumferential flow type
F04D15/00D:	. Rotors with adjustable blades [M1111]
F04D15/00D2:	. . responsive to temperature
F04D15/00G:	. by changing the speed, e.g. of the driving engine
F04D15/00H:	. Installation or systems with two or more pumps, wherein the flow path through the stages can be changed, e.g. series-parallel [M1111]
F04D15/00K:	. Safety measures F04D15/02 takes precedence [M1111]
F04D15/00K2:	. . Protection against sudden pressure change, e.g. check valves
F04D15/00L:	. Testing machines [M1111]
F04D15/00R:	. Indicators of rotational movement
F04D15/02:	. Stopping of pumps, or operating valves, on occurrence of unwanted conditions
F04D15/02B:	. . responsive to a condition of the working fluid F04D15/02F takes precedence
F04D15/02B2:	. . . the condition being a liquid level or a lack of liquid supply
F04D15/02B2H:	. . . . Lack of liquid level being detected using a flow transducer
F04D15/02B2J:	. . . . Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption
F04D15/02C:	. . responsive to a condition of the pump
F04D15/02C2:	. . . the condition being speed or load
F04D15/02C3:	. . . the condition being temperature, ingress of humidity or leakage
F04D15/02C4:	. . . the condition being wear or a position
F04D15/02D:	. . responsive to a condition not otherwise provided for
F04D15/02F:	. . for pumps operating in parallel [M1111]
F04D17/00:	Radial-flow pumps e.g. centrifugal pumps; Helico-centrifugal pumps
F04D17/02:	. having non-centrifugal stages, e.g. centripetal
F04D17/02B:	. . comprising axial flow and radial flow stages
F04D17/04:	. . of transverse-flow type
F04D17/06:	. Helico-centrifugal pumps
F04D17/08:	. Centrifugal pumps
F04D17/10:	. . for compressing or evacuating
F04D17/10B:	. . . with double suction
F04D17/12:	. . . Multi-stage pumps
F04D17/12B:	. . . . the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
F04D17/12B2:	. . . . . the casing being vertically split
F04D17/12C:	. . . . with radially spaced stages, e.g. for contrarotating type
F04D17/14:	. . . . with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads,
F04D17/16:	. . for displacing without appreciable compression
F04D17/16B:	. . . Shear force pumps
F04D17/16C:	. . . Double suction pumps
F04D17/16D:	. . . Multi-stage fans, e.g. for vacuum cleaners
F04D17/16F:	. . . Axial entry and discharge
F04D17/16G:	. . . Operating by means of fibrous or porous elements suction filters F04D29/70C; e.g. with sponge rotors
F04D17/16H:	. . . Pumps specially adapted to produce a vacuum
F04D17/18:	. . characterised by use of centrifugal force of liquids entrained in pumps e.g. by means of an auxiliary liquid; fluid ring compressors F04C19/00
F04D19/00:	Axial-flow pumps ; pump comprising axial flow and radial flow stages F04D17/02B
F04D19/00B:	. Axial flow fans
F04D19/00B2:	. . reversible fans
F04D19/00C:	. multistage fans
F04D19/02:	. Multi-stage pumps
F04D19/02B:	. . with concentric rows of vanes;
F04D19/02C:	. . with contrarotating parts
F04D19/02D:	. . with a plurality of shafts rotating at different speeds F04D19/02B takes precedence
F04D19/02G:	. . Layout of fluid flow through the stages
F04D19/04:	. . specially adapted to the production of a high vacuum, e.g. molecular pumps
F04D19/04B:	. . . Turbomolecular vacuum pumps
F04D19/04C:	. . . Holweck-type pumps
F04D19/04D:	. . . Combinations of two or more different types of pumps
F04D19/04F:	. . . comprising magnetic bearings
F04D21/00:	Pump involving supersonic speed of pumped fluids
F04D23/00:	Other rotary non-positive-displacement pumps
F04D23/00B:	. Pumps adapted for conveying materials or for handling specific elastic fluids
F04D23/00B2:	. . of radial-flow type
F04D23/00B3:	. . of axial-flow type
F04D23/00D:	. Creating a pulsating flow
F04D23/00R:	. Regenerative pumps (for liquids or for liquids and elastic fluids 5/00R)
F04D25/00:	Pumping installations or systems
F04D25/02:	. Units comprising pumps and their driving means (predominant aspect of the driving means, see the relevant classes for such means)
F04D25/02B:	. . comprising a yielding coupling, e.g. hydraulic (a magnetic coupling 25/02D)
F04D25/02C:	. . the driving means being assisted by a power recovery turbine
F04D25/02D:	. . with a magnetic coupling
F04D25/02F:	. . the driving means being a planetary gear
F04D25/04:	. . the pump being fluid-driven pumps driven by exhaust gases F02B37/00, F02B39/00; turbochargers F02C6/12
F04D25/04B:	. . . the pump wheel carrying the fluid driving means, e.g. turbine blades
F04D25/06:	. . the pump being electrically driven
F04D25/06B:	. . . the electric motor being specially adapted for integration in the pump [M1111]
F04D25/06B2:	. . . . the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator [M1111]
F04D25/06B2B:	. . . . . Details of the bearings
F04D25/06B2D:	. . . . . Details of the lubrication
F04D25/06B2F:	. . . . . Details of the magnetic circuit
F04D25/06B2H:	. . . . . Details of the rotor
F04D25/06B2J:	. . . . . Details of the stator
F04D25/06B3:	. . . . the motor having a plane air gap, e.g. disc-type
F04D25/06B4:	. . . . Linear Motors [M1111]
F04D25/06B6:	. . . . a sensor is integrated into the pump/motor design
F04D25/06L:	. . . Battery powered
F04D25/06N:	. . . Mechanical details of the pump control unit (pump control details F04D27)
F04D25/06S:	. . . specially adapted for submerged use
F04D25/06W:	. . . Details or arrangements of the wiring
F04D25/08:	. . the working fluid being air, e.g. for ventilation
F04D25/08B:	. . . the unit having provision for cooling the motor
F04D25/08C:	. . . hand fans
F04D25/08C2:	. . . . hand operated
F04D25/08D:	. . . Ceiling fans
F04D25/10:	. . . the unit having provisions for automatically changing direction of output air
F04D25/10C:	. . . . by changing rotor axis direction, e.g. oscillating fans interconnecting rotary motion and oscillating motion F16H
F04D25/12:	. . . the unit being adapted for mounting in apertures
F04D25/14:	. . . . and having shutters, e.g. automatically closed when not in use
F04D25/16:	. Combinations of two or more pumps Producing two or more separate gas flows
F04D25/16B:	. . driven by a common gearing arrangement
F04D25/16C:	. . using fans
F04D27/00:	Control, e.g. regulation, of pumps, pumping installations or systems
F04D27/00B:	. Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring [M1111]
F04D27/00C:	. by varying geometry within the pumps, e.g. by adjusting vanes
F04D27/00D:	. by throttling F04D27/00C takes precedence
F04D27/00F:	. by varying driving speed
F04D27/00G:	. by changing flow path between different stages or between a plurality of compressors; Load distribution between compressors
F04D27/00K:	. by influencing fluid temperatures
F04D27/00L:	. Conjoint control of two or more different functions
F04D27/00P:	. Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
F04D27/00R:	. by bleeding, by passing or recycling fluid
F04D27/02:	. Surge control surge detection F04D27/00B
F04D27/02B:	. . by bleeding, bypassing or recycling fluids
F04D27/02B2:	. . . Arrangements therefor, e.g. bleed or by-pass valves
F04D27/02B4:	. . . Control schemes therefor
F04D27/02B6:	. . . Details or means for fluid extraction
F04D27/02B8:	. . . Details or means for fluid reinjection
F04D27/02C:	. . by varying geometry within the pumps, e.g. by adjusting vanes
F04D27/02D:	. . by throttling F04D27/02C takes precedence
F04D27/02F:	. . by varying driving speed
F04D27/02G:	. . by changing flow path between different stages or between a plurality of compressors; load distribution between compressors
F04D27/02K:	. . by influencing fluid temperature
F04D27/02L:	. . Conjoint control of two or more different functions
F04D27/02P:	. . Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
F04D29/00:	Details, component parts, or accessories
F04D29/00C:	. especially adapted for elastic fluid pumps
F04D29/00E:	. Decorative aspects, i.e. features which have no effect on the functioning of the pump
F04D29/00P:	. especially adapted for liquid pumps
F04D29/02:	. Selection of particular materials
F04D29/02C:	. . especially adapted for elastic fluid pumps
F04D29/02P:	. . especially adapted for liquid pumps
F04D29/04:	. Shafts or bearings, or assemblies thereof (specially adapted for elastic fluid pumps F04D29/05)
F04D29/041:	. . Axial thrust balancing
F04D29/041B:	. . . [N: hydrostatic; hydrodynamic thrust bearings]
F04D29/041D:	. . . [N: balancing pistons]
F04D29/042:	. . Axially shiftable rotors F04D29/041 takes precedence [N: control by creating a by-pass F04D15/00C]
F04D29/043:	. . Shafts
F04D29/044:	. . . Arrangements for joining or assembling shafts
F04D29/046:	. . Bearings
F04D29/046B:	. . . [N: Bearing cartridges]
F04D29/046D:	. . . [N: Ceramic bearing designs]
F04D29/046F:	. . . [N: Spherical bearings]
F04D29/047:	. . . hydrostatic; hydrodynamic
F04D29/047B:	. . . . [N: for radial pumps]
F04D29/047D:	. . . . [N: for axial pumps]
F04D29/048:	. . . magnetic; electromagnetic
F04D29/049:	. . . Roller bearings
F04D29/04B:	. . [N: joining shafts, e.g. rigid couplings, quill shafts] [N: WARNING: The group F04D29/04B 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 F04D29/044 and F04D29/054]
F04D29/05:	. Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
F04D29/051:	. . Axial thrust balancing
F04D29/051B:	. . . [N: hydrostatic; hydrodynamic thrust bearings]
F04D29/051D:	. . . [N: balancing pistons]
F04D29/052:	. . Axially shiftable rotors F04D29/051 takes precedence [N: control by creating a by-pass F04D27/02C]
F04D29/053:	. . Shafts
F04D29/054:	. . . Arrangements for joining or assembling shafts
F04D29/056:	. . Bearings
F04D29/056B:	. . . [N: Bearings cartridges]
F04D29/056D:	. . . [N: Ceramic bearing designs]
F04D29/057:	. . . hydrostatic; hydrodynamic
F04D29/058:	. . . magnetic; electromagnetic
F04D29/059:	. . . Roller bearings
F04D29/06:	. Lubrication [N: (F04D13/06B, F04D13/06C, F04D13/06D take precedence)]
F04D29/063:	. . especially adapted for elastic fluid pumps
F04D29/06P:	. . [N: especially adapted for liquid pumps]
F04D29/08:	. Sealings
F04D29/08C:	. . especially adapted for elastic fluid pumps
F04D29/08P:	. . especially adapted for liquid pumps
F04D29/10:	. . Shaft sealings
F04D29/10C:	. . . especially adapted for elastic fluid pumps
F04D29/10C2:	. . . . the sealing fluid being other than the working fluid or being the working fluid treated
F04D29/10P:	. . . especially adapted for liquid pumps
F04D29/10P2:	. . . . the sealing fluid being other than the working liquid or being the working liquid treated
F04D29/12:	. . . using sealing-rings
F04D29/12C:	. . . . especially adapted for elastic fluid pumps
F04D29/12C2:	. . . . . with special means for adducting cooling or sealing fluid
F04D29/12P:	. . . . especially adapted for liquid pumps
F04D29/12P2:	. . . . . with special means for adducting cooling or sealing fluid
F04D29/14:	. . . operative only when pump is inoperative
F04D29/14C:	. . . . especially adapted for elastic fluid pumps
F04D29/14P:	. . . . especially adapted for liquid pumps
F04D29/16:	. . between pressure and suction sides
F04D29/16C:	. . . especially adapted for elastic fluid pumps
F04D29/16C2:	. . . . of a centrifugal flow wheel
F04D29/16C3:	. . . . of an axial flow wheel
F04D29/16P:	. . . especially adapted for liquid pumps
F04D29/16P2:	. . . . of a centrifugal flow wheel
F04D29/16P3:	. . . . of an axial flow wheel
F04D29/18:	. Rotors
F04D29/18A:	. . Axial flow rotors F04D29/18B take precedence
F04D29/18A2:	. . . Semi axial flow rotors
F04D29/18B:	. . Rotors consisting of a plurality of wheels
F04D29/18C:	. . Shaftless rotors F04D13/02B3 takes precedence
F04D29/18R:	. . specially for regenerative pumps
F04D29/20:	. . Mounting rotors on shafts
F04D29/22:	. . specially for centrifugal pumps
F04D29/22B:	. . . Conventional flow pattern F04D29/18 takes precedence
F04D29/22B2:	. . . . More than one set of flow passages
F04D29/22B3:	. . . . Shape, geometry F04D29/22B2 takes precedence
F04D29/22B4:	. . . . Construction and assembly F04D29/22B2 takes precedence
F04D29/22B4B:	. . . . . for special materials
F04D29/22B4C:	. . . . . entirely open or stamped from one sheet
F04D29/22C:	. . . Special flow patterns F04D11/00B takes precedence
F04D29/22C2:	. . . . Free vortex
F04D29/22C3:	. . . . Channel wheels, e.g. one blade or one flow channel
F04D29/22C4:	. . . . flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect
F04D29/22D:	. . . with special measures
F04D29/22D2:	. . . . for sealing or thrust balance F04D29/04 and F04D29/16 take precedence
F04D29/22D3:	. . . . for influencing flow or boundary layer
F04D29/22D4:	. . . . for increasing NPSH or dealing with liquids near boiling-point
F04D29/22D5:	. . . . for reverse pumping action
F04D29/22D6:	. . . . for comminuting, mixing or separating
F04D29/22D7:	. . . . for protection, e.g. against abrasion
F04D29/24:	. . . Vanes
F04D29/24A:	. . . . Geometry, shape
F04D29/24A2:	. . . . . for special effects
F04D29/24B:	. . . . elastic or self-adjusting
F04D29/26:	. Rotors specially for elastic fluids
F04D29/26B:	. . mounting fan or blower rotors on shafts
F04D29/26D:	. . mounting compressor rotors on shafts
F04D29/28:	. . for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
F04D29/28B:	. . . for fans or blowers
F04D29/28B2:	. . . . the leading edge of each vane being substantially parallel to the rotation axis
F04D29/28B2B:	. . . . . rotors of the squirrel-cage type
F04D29/28C:	. . . for compressors
F04D29/28C2:	. . . . the compressor wheel comprising a pair of rotatable bladed hub portions axially aligned and clamped together
F04D29/28C3:	. . . . multi-stage rotors
F04D29/28D:	. . . with adjusting means
F04D29/28F:	. . . Part of the wheel having an ejecting effect e.g. being bladeless diffuser
F04D29/28G:	. . . having provision against erosion or for dust-separation
F04D29/30:	. . . Vanes
F04D29/30B:	. . . . Flexible vanes
F04D29/32:	. . for axial flow pumps multistage rotors F01D5/00
F04D29/32B:	. . . for axial flow compressors
F04D29/32B2:	. . . . blade mountings F01D5/30 takes precedence
F04D29/32B2B:	. . . . . adjustable
F04D29/32B3:	. . . . blades F01D5/28B takes precedence
F04D29/32K:	. . . for axial flow fans blade mountings F04D29/34, blades F04D29/38
F04D29/32K2:	. . . . comprising a rotating shroud
F04D29/32K4:	. . . . with non identical blades
F04D29/32K6:	. . . . with unequal distribution of blades around the hub
F04D29/32K8:	. . . . Details of the hub
F04D29/34:	. . . Blade mountings for axial flow compressors F04D29/32B2
F04D29/36:	. . . . adjustable flexible blades F04D29/38B
F04D29/36B:	. . . . . during rotation
F04D29/36B2:	. . . . . . The blades having only a predetermined number of possible positions
F04D29/36B3:	. . . . . . Adjustment by interaction of inertion and lift
F04D29/36B4:	. . . . . . Adjustment by differences of temperature
F04D29/38:	. . . Blades for axial flow compressors F04D29/32B3
F04D29/38B:	. . . . Flexible blades
F04D29/38C:	. . . . characterised by form
F04D29/38C2:	. . . . . Skewed blades
F04D29/38D:	. . . . characterised by construction
F04D29/40:	. Casings; Connections of working fluid bleed or by-pass valves F04D15/00B2, F04D27/02B2
F04D29/40C:	. . especially adapted for elastic fluid pumps
F04D29/40P:	. . especially adapted for liquid pumps
F04D29/42:	. . for radial or helico-centrifugal pumps
F04D29/42C:	. . . especially adapted for elastic fluid pumps
F04D29/42C2:	. . . . suction ports
F04D29/42C3:	. . . . Discharge tongues F04D17/04 takes precedence
F04D29/42C4:	. . . . Fan casings
F04D29/42C4B:	. . . . . with volutes extending mainly in axial or radially inward direction
F04D29/42C4C:	. . . . . Double entry casings
F04D29/42C4D:	. . . . . comprising more than one outlet
F04D29/42C4F:	. . . . . with axial entry and discharge
F04D29/42P:	. . . especially adapted for liquid pumps
F04D29/42P1:	. . . . made of sheet metal
F04D29/42P2:	. . . . suction eyes
F04D29/42P3:	. . . . Discharge tongues F04D17/04 takes precedence
F04D29/42P4:	. . . . inside lining e.g. rubber
F04D29/42P6:	. . . . Details of fluid inlet or outlet
F04D29/44:	. . . Fluid-guiding means, e.g. diffusers
F04D29/44C:	. . . . especially adapted for elastic fluid pumps
F04D29/44C2:	. . . . . rotating diffusers
F04D29/44C3:	. . . . . Bladed diffusers
F04D29/44P:	. . . . especially adapted for liquid pumps
F04D29/44P2:	. . . . . rotating diffusers
F04D29/44P3:	. . . . . bladed diffusers
F04D29/46:	. . . . adjustable
F04D29/46C:	. . . . . especially adapted for elastic fluid pumps
F04D29/46C2:	. . . . . . adjusting flow cross-section, otherwise than by using adjustable stator blades
F04D29/46P:	. . . . . especially adapted for liquid fluid pumps
F04D29/46P2:	. . . . . . adjusting flow cross-section, otherwise than by using adjustable stator blades
F04D29/48:	. . . . . for unidirectional fluid flow in reversible pumps rotors for reverse action F04D29/22D5
F04D29/48C:	. . . . . . especially adapted for elastic fluid pumps
F04D29/48P:	. . . . . . especially adapted for liquid pumps
F04D29/50:	. . . . . for reversing fluid flow rotors for reverse action F04D29/22D5
F04D29/50C:	. . . . . . especially adapted for elastic fluid pumps
F04D29/50P:	. . . . . . especially adapted for liquid pumps
F04D29/52:	. . for axial pumps
F04D29/52C:	. . . especially adapted for elastic fluid pumps
F04D29/52C2:	. . . . shiftable members for obturating part of the flow path
F04D29/52C4:	. . . . Details of the casing section radially opposing blade tips ducts F04D29/54C3
F04D29/52P:	. . . especially adapted for liquid pumps
F04D29/54:	. . . Fluid-guiding means, e.g. diffusers
F04D29/54C:	. . . . Specially adapted for elastic fluid pumps F04D29/56 takes precedence
F04D29/54C2:	. . . . . Bladed diffusers fixing blades to stators F01D9/04C
F04D29/54C2B:	. . . . . . Blade shapes
F04D29/54C3:	. . . . . Ducts
F04D29/54C3C:	. . . . . . having a special shape in order to influence fluid flow
F04D29/54P:	. . . . Specially adapted for liquid pumps F04D29/56 takes precedence
F04D29/56:	. . . . adjustable
F04D29/56C:	. . . . . specially adapted for elastic fluid pumps
F04D29/56P:	. . . . . specially adapted for liquid pumps
F04D29/58:	. Cooling ; Heating; Diminishing heat transfer for the motor of air-pump units F04D25/08B; cooling of shafts or bearings F04D29/04
F04D29/58A:	. . Cooling the drive system
F04D29/58B:	. . Cooling the control unit
F04D29/58C:	. . specially adapted for elastic fluid pumps
F04D29/58C2:	. . . Cooling at least part of the working fluid in a heat exchanger
F04D29/58C2B:	. . . . flow schemes and regulation thereto
F04D29/58C3:	. . . cooling or heating the machine F04D29/58C4, F04D29/58C6 take precedence
F04D29/58C4:	. . . cooling by injection
F04D29/58C6:	. . . heat insulation or conduction
F04D29/58P:	. . specially adapted for liquid pumps
F04D29/58P2:	. . . Cooling at last part of the working fluid in a heat exchanger
F04D29/58P2B:	. . . . flow schemes and regulation thereto
F04D29/58P3:	. . . cooling or heating the machine F04D29/58P4, F04D29/58P6 take precedence
F04D29/58P4:	. . . cooling by injection
F04D29/58P6:	. . . heat insulation or conduction
F04D29/60:	. Mounting; Assembling; Disassembling F04D13/10 takes precedence
F04D29/60C:	. . specially adapted for elastic fluid pumps
F04D29/60C2:	. . . Mounting in cavities
F04D29/60C2B:	. . . . means for positioning from outside
F04D29/60C2D:	. . . . means for removing without depressurising the cavity
F04D29/60P:	. . specially adapted for liquid pumps
F04D29/60P2:	. . . Mounting in cavities
F04D29/60P2B:	. . . . means for positioning from outside
F04D29/60P2D:	. . . . means for removing without depressurizing the cavity
F04D29/62:	. . of radial or helico-centrifugal pumps
F04D29/62A:	. . . Adjusting the clearances between rotary and stationary parts
F04D29/62C:	. . . especially adapted for elastic fluid pumps
F04D29/62C2:	. . . . Mounting or removal of fans [M1111]
F04D29/62P:	. . . especially adapted for liquid pumps
F04D29/64:	. . of axial pumps
F04D29/64A:	. . . by adjusting the clearances between rotary and stationary parts
F04D29/64C:	. . . especially adapted for elastic fluid pumps
F04D29/64C2:	. . . . Mounting or removal of fans [M1111]
F04D29/64P:	. . . especially adapted for liquid pumps
F04D29/66:	. Combating cavitation, whirls, noise, vibration or the like ; Balancing
F04D29/66C:	. . especially adapted for elastic fluid pumps
F04D29/66C2:	. . . Balancing of rotors compensating unbalance G01M1/36
F04D29/66C4:	. . . Sound attenuation
F04D29/66C4B:	. . . . by means of sound absorbing material
F04D29/66C4C:	. . . . by means of resonance chambers or interference
F04D29/66C6:	. . . by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
F04D29/66C7:	. . . by influencing the flow pattern, e.g. suppression of turbulence
F04D29/66C8:	. . . damping or preventing mechanical vibrations
F04D29/66P:	. . especially adapted for liquid pumps F04D29/18 takes precedence
F04D29/68:	. . by influencing boundary layers by bleeding elastic fluid F04D27/02B2
F04D29/68C:	. . . especially adapted for elastic fluid pumps
F04D29/68C2:	. . . . by fluid extraction
F04D29/68C4:	. . . . by fluid injection
F04D29/68C6:	. . . . Inducing localised fluid recirculation in the stator-rotor interface
F04D29/68C8:	. . . . Plasma actuators therefore
F04D29/68P:	. . . especially adapted for liquid pumps
F04D29/70:	. Suction grids; Strainers; Dust separation; Cleaning
F04D29/70C:	. . especially adapted for elastic fluid pumps
F04D29/70C2:	. . . specially for fans, e.g. fan guards
F04D29/70C3:	. . . Adding liquids
F04D29/70C4:	. . . Humidity separation
F04D29/70P:	. . specially for liquid pumps
F04D31/00:	Pumping liquids and elastic fluids at the same time
F04D33/00:	Non-positive-displacement pumps with other than pure rotation, e.g. of oscillating type
F04D35/00:	Pumps producing waves in liquids, i.e. wave.producers