IPC 7 English version
F04D-F04D03500

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING


F 04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS (portable fire extinguishers with manually-operated pumps A62C 11/00, with power-driven pumps A62C 25/00; charging or scavenging combustion engines by pumps F02B; engine fuel-injection pumps F02M; ion pumps H01J 41/12; electrodynamic pumps H02K 44/02)


F 04 DNON-POSITIVE-DISPLACEMENT PUMPS


Notes

(1)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.

(2)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.

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


Subclass Index

ROTARY PUMPS FOR LIQUID AND ELASTIC FLUID OR LIQUID ALONE 

Kind of flow: radial or helico-centrifugal; axial; circumferential or transverse; other 

F04D 1/00; F04D 3/00; F04D 5/00; F04D 11/00 

For handling specific fluids 

F04D 7/00 

Priming, preventing vapour lock 

F04D 9/00 

Pumping installations or systems; control 

F04D 13/00; F04D 15/00 

ROTARY PUMPS FOR ELASTIC FLUID 

Kind of flow: radial or helico-centrifugal; axial; other 

F04D 17/00; F04D 19/00; F04D 23/00 

Involving supersonic speed of fluid 

F04D 21/00 

Pumping installations; control 

F04D 25/00; F04D 27/00 

DETAILS OR ACCESSORIES 

F04D 29/00 

OTHER KINDS OF PUMPS 

Pumping liquid and elastic fluid at the same time 

F04D 31/00 

With other than pure rotation 

F04D 33/00 

Wave producers 

F04D 35/00 


Pumping liquids, or liquids and elastic fluids, by rotary pumps (pumping liquids and elastic fluids at the same time F04D 31/00)


1/

00Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00)

1/

02.having non-centrifugal stages, e.g. centripetal

1/

04.Helico-centrifugal pumps

1/

06.Multi-stage pumps (F04D 1/02 takes precedence)

1/

08..the stages being situated concentrically

1/

10..with means for changing the flow-path through the stages, e.g. series/parallel

1/

12.Pumps with scoops or like paring members protruding in the fluid circulating in a bowl

1/

14.Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis


3/

00Axial-flow pumps (priming or boosting F04D 9/00)

3/

02.of screw type


5/

00Pumps with circumferential or transverse flow


7/

00Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts

7/

02.of centrifugal type

7/

04..the fluids being viscous or non-homogeneous

7/

06..the fluids being hot or corrosive, e.g. liquid metal

7/

08..the fluids being radioactive


9/

00Priming; Preventing vapour lock

9/

02.Self-priming pumps

9/

04.using priming pumps; using booster pumps to prevent vapour lock

9/

06..of jet type


11/

00Other rotary non-positive-displacement pumps (pumping installations or systems F04D 13/00)


13/

00Pumping installations or systems (controlling F04D 15/00)

13/

02.Units comprising pumps and their driving means (predominant aspects of the driving means, see the relevant classes for such means)

13/

04..the pump being fluid-driven

13/

06..the pump being electrically driven

13/

08...for submerged use

13/

10....adapted for use in mining bore holes

13/

12.Combinations of two or more pumps (combinations with priming pumps or booster pumps to counter-act vapour lock F04D 9/04)

13/

14..the pumps being all of centrifugal type

13/

16.with storage reservoirs


15/

00Control, e.g. regulation, of pumps, pumping installations, or systems

15/

02.Stopping of pumps, or operating valves, on occurrence of unwanted conditions


Pumping elastic fluids by rotary pumps


17/

00Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (F04D 21/00 takes precedence)

17/

02.having non-centrifugal stages, e.g. centripetal

17/

04..of transverse-flow type

17/

06.Helico-centrifugal pumps

17/

08.Centrifugal pumps

17/

10..for compressing or evacuating

17/

12...Multi-stage pumps

17/

14....with means for changing the flow-path through the stages, e.g. series/parallel (surge control F04D 27/02)

17/

16..for displacing without appreciable compression

17/

18..characterised by use of centrifugal force of liquids entrained in pumps


19/

00Axial-flow pumps (F04D 21/00 takes precedence)

19/

02.Multi-stage pumps

19/

04..specially adapted to the production of a high vacuum, e.g. molecular pumps


21/

00Pumps involving supersonic speed of pumped fluids


23/

00Other rotary non-positive-displacement pumps (pumping installations or systems F04D 25/00)


25/

00Pumping installations or systems (controlling F04D 27/00)

25/

02.Units comprising pumps and their driving means (predominant aspects of the driving means, see the relevant classes for such means)

25/

04..the pump being fluid-driven

25/

06..the pump being electrically driven (F04D 25/08 takes precedence)

25/

08..the working fluid being air, e.g. for ventilation

25/

10...the unit having provisions for automatically changing the direction of output air

25/

12...the unit being adapted for mounting in apertures

25/

14....and having shutters, e.g. automatically closed when not in use

25/

16.Combinations of two or more pumps


27/

00Control, e.g. regulation, of pumps, pumping installations, or systems

27/

02.Surge control


29/

00Details, component parts, or accessories (machine elements in general F16)

29/

02.Selection of particular materials (for handling specific liquids F04D 7/00)

29/

04.Shafts; Bearings; Lubrication (of machines or engines in general F01M)

29/

06..Lubrication

29/

08.Sealings

29/

10..Shaft sealings

29/

12...using sealing-rings

29/

14...operative only when pump is inoperative

29/

16..between pressure and suction sides

29/

18.Rotors (specially for elastic fluids F04D 29/26)

29/

20..Mounting rotors on shafts

29/

22..specially for centrifugal pumps

29/

24...Vanes

29/

26.Rotors specially for elastic fluids

29/

28..for centrifugal or helico-centrifugal pumps

29/

30...Vanes

29/

32..for axial-flow pumps

29/

34...Blade mountings

29/

36....adjustable

29/

38...Blades

29/

40.Casings; Connections for working fluid

29/

42..for radial or helico-centrifugal pumps

29/

44...Fluid-guiding means, e.g. diffusers

29/

46....adjustable

29/

48.....for unidirectional fluid flow in reversible pumps

29/

50.....for reversing fluid flow

29/

52..for axial pumps

29/

54...Fluid-guiding means, e.g. diffusers

29/

56....adjustable

29/

58.Cooling (of machines or engines in general F01P); Heating; Diminishing heat transfer

29/

60.Mounting; Assembling; Disassembling

29/

62..of radial or helico-centrifugal pumps

29/

64..of axial pumps

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)

29/

68..by influencing boundary layers

29/

70.Suction grids; Strainers; Dust separation; Cleaning


Other non-positive-displacement pumps


31/

00Pumping liquids and elastic fluids at the same time


33/

00Non-positive-displacement pumps with other than pure rotation, e.g. of oscillating type (F04D 35/00 takes precedence; hand-held fans A45B) [2]


35/

00Pumps producing waves in liquids, i.e. wave-producers (for bath tubs A47K 3/10) [2]