|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

ENGINES AND PUMPS

|  | F04 |
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS (charging or scavenging combustion engines by pumps Fulltext... Hierarchy... Expanded...F02B; engine fuel-injection pumps Fulltext... Hierarchy... Expanded...F02M; electric discharge pumps Fulltext... Hierarchy... Expanded...H01J 41/00; pumping by electrodynamic action Fulltext... Hierarchy... Expanded...H02N 4/20)

|  | F04 |
Note(s) Combinations of positive-displacement and non-positive-displacement pumps are to be found in the following sub-classes: Fulltext... Hierarchy... Expanded...F04B as a general sub-class for pumps; Fulltext... Hierarchy... Expanded...F04C, D in respect of matter peculiar to these sub-classes.

|  | F04D |
NON-POSITIVE-DISPLACEMENT PUMPS

|  | F04D |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards the definition of the term "pump". This sub-class comprises: non-positive-displacement pumps for liquids, for elastic fluids, or for liquids and elastic fluids, whether rotary or not having pure rotation. Combinations of non-positive-displacement pumps with other pumps are dealt with in sub-class Fulltext... Hierarchy... Expanded...F04B, except that the use of such other pumps for priming or boosting non-positive-displacement pumps is dealt with in the present sub-class (Fulltext... Hierarchy... Expanded...F04D).

|  | F04D 1/00 - F04D 15/00 |
Pumping liquids, or liquids and elastic fluids, by rotary pumps (pumping liquids and elastic fluids at the same time Fulltext... Hierarchy... Expanded...F04D 31/00)

|  | F04D 1/00 |
Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids Fulltext... Hierarchy... Expanded...F04D 7/00; priming or boosting Fulltext... Hierarchy... Expanded...F04D 9/00)

|  | F04D 1/02 |
· | having non-centrifugal stages, e.g. centripetal

|  | F04D 1/04 |
· | Helico-centrifugal pumps

|  | F04D 1/06 |
· | Multi-stage pumps (Fulltext... Hierarchy... Expanded...F04D 1/02 takes precedence)

|  | 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

|  | 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

|  | F04D 3/00 |
Axial-flow pumps (priming or boosting Fulltext... Hierarchy... Expanded...F04D 9/00)

|  | F04D 3/02 |
· | of screw type

|  | F04D 5/00 |
Pumps with circumferential or transverse flow

|  | F04D 7/00 |
Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts

|  | F04D 7/02 |
· | of centrifugal type

|  | F04D 7/04 |
· · | the fluids being viscous or non-homogeneous

|  | F04D 7/06 |
· · | the fluids being hot or corrosive, e.g. liquid metal

|  | F04D 7/08 |
· · | the fluids being radioactive

|  | F04D 9/00 |
Priming; Preventing vapour lock

|  | F04D 9/02 |
· | Self-priming pumps

|  | F04D 9/04 |
· | Using priming pumps; Using booster pumps to prevent vapour lock

|  | F04D 9/06 |
· · | of jet type

|  | F04D 11/00 |
Other rotary non-positive-displacement pumps (pumping installations or systems Fulltext... Hierarchy... Expanded...F04D 13/00)

|  | F04D 13/00 |
Pumping installations or systems (controlling Fulltext... Hierarchy... Expanded...F04D 15/00)

|  | F04D 13/02 |
· | Units comprising pumps and their driving means (predominant aspects of the driving means, see the relevant classes for such means)

|  | F04D 13/04 |
· · | the pump being fluid-driven

|  | F04D 13/06 |
· · | the pump being electrically driven

|  | F04D 13/08 |
· · · | for submerged use

|  | F04D 13/10 |
· · · · | adapted for use in mining bore holes

|  | F04D 13/12 |
· | Combinations of two or more pumps (combinations with priming pumps or booster pumps to counter-act vapour lock Fulltext... Hierarchy... Expanded...F04D 9/04)

|  | F04D 13/14 |
· · | the pumps being all of centrifugal type

|  | F04D 13/16 |
· | with storage reservoirs

|  | F04D 15/00 |
Control, e.g. regulation, of pumps, pumping installations, or systems

|  | F04D 15/02 |
· | Stopping of pumps, or operating valves, on occurrence of unwanted conditions

|  | F04D 17/00 - F04D 27/00 |
Pumping elastic fluids by rotary pumps

|  | F04D 17/00 |
Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (Fulltext... Hierarchy... Expanded...F04D 21/00 takes precedence)

|  | F04D 17/02 |
· | having non-centrifugal stages, e.g. centripetal

|  | F04D 17/04 |
· · | of transverse-flow type

|  | F04D 17/06 |
· | Helico-centrifugal pumps

|  | F04D 17/08 |
· | Centrifugal pumps

|  | F04D 17/10 |
· · | for compressing or evacuating

|  | F04D 17/12 |
· · · | Multi-stage pumps

|  | F04D 17/14 |
· · · · | with means for changing the flow-path through the stages, e.g. series/parallel (surge control Fulltext... Hierarchy... Expanded...F04D 27/02)

|  | F04D 17/16 |
· · | for displacing without appreciable compression

|  | F04D 17/18 |
· · | characterised by use of centrifugal force of liquids entrained in pumps

|  | F04D 19/00 |
Axial-flow pumps (Fulltext... Hierarchy... Expanded...F04D 21/00 takes precedence)

|  | F04D 19/02 |
· | Multi-stage pumps

|  | F04D 19/04 |
· · | specially adapted to the production of a high vacuum, e.g. molecular pumps

|  | F04D 21/00 |
Pumps involving supersonic speed of pumped fluids

|  | F04D 23/00 |
Other rotary non-positive-displacement pumps (pumping installations or systems Fulltext... Hierarchy... Expanded...F04D 25/00)

|  | F04D 25/00 |
Pumping installations or systems (controlling Fulltext... Hierarchy... Expanded...F04D 27/00)

|  | F04D 25/02 |
· | Units comprising pumps and their driving means (predominant aspects of the driving means, see the relevant classes for such means)

|  | F04D 25/04 |
· · | the pump being fluid-driven

|  | F04D 25/06 |
· · | the pump being electrically driven (Fulltext... Hierarchy... Expanded...F04D 25/08 takes precedence)

|  | F04D 25/08 |
· · | the working fluid being air, e.g. for ventilation

|  | F04D 25/10 |
· · · | the unit having provisions for automatically changing the direction of output air

|  | 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

|  | F04D 25/16 |
· | Combinations of two or more pumps

|  | F04D 27/00 |
Control, e.g. regulation, of pumps, pumping installations, or systems

|  | F04D 27/02 |
· | Surge control

|  | F04D 29/00 |
Details, component parts, or accessories of rotary pumps, not provided for in, or of interest apart from, groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F04D 1/00-F04D 27/00

|  | F04D 29/00 |
Details, component parts, or accessories (machine elements in general Fulltext... Hierarchy... Expanded...F16)

|  | F04D 29/02 |
· | Selection of particular materials (for handling specific liquids Fulltext... Hierarchy... Expanded...F04D 7/00)

|  | F04D 29/04 |
· | Shafts; Bearings; Lubrication (of machines or engines in general Fulltext... Hierarchy... Expanded...F01M)

|  | F04D 29/06 |
· · | Lubrication

|  | F04D 29/08 |
· | Sealings

|  | F04D 29/10 |
· · | Shaft sealings

|  | F04D 29/12 |
· · · | using sealing-rings

|  | F04D 29/14 |
· · · | operative only when pump is inoperative

|  | F04D 29/16 |
· · | between pressure and suction sides

|  | F04D 29/18 |
· | Rotors (specially for elastic fluids Fulltext... Hierarchy... Expanded...F04D 29/26)

|  | F04D 29/20 |
· · | Mounting rotors on shafts

|  | F04D 29/22 |
· · | specially for centrifugal pumps

|  | F04D 29/24 |
· · · | Vanes

|  | F04D 29/26 |
· | Rotors specially for elastic fluids

|  | F04D 29/28 |
· · | for centrifugal or helico-centrifugal pumps

|  | F04D 29/30 |
· · · | Vanes

|  | F04D 29/32 |
· · | for axial-flow pumps

|  | F04D 29/34 |
· · · | Blade mountings

|  | F04D 29/36 |
· · · · | adjustable

|  | F04D 29/38 |
· · · | Blades

|  | F04D 29/40 |
· | Casings; Connections for working fluid

|  | F04D 29/42 |
· · | for radial or helico-centrifugal pumps

|  | F04D 29/44 |
· · · | Fluid-guiding means, e.g. diffusers

|  | F04D 29/46 |
· · · · | adjustable

|  | F04D 29/48 |
· · · · · | for unidirectional fluid flow in reversible pumps

|  | F04D 29/50 |
· · · · · | for reversing fluid flow

|  | F04D 29/52 |
· · | for axial pumps

|  | F04D 29/54 |
· · · | Fluid-guiding means, e.g. diffusers

|  | F04D 29/56 |
· · · · | adjustable

|  | F04D 29/58 |
· | Cooling (of machines or engines in general Fulltext... Hierarchy... Expanded...F01P); Heating; Diminishing heat transfer

|  | F04D 29/60 |
· | Mounting; Assembling; Disassembling

|  | F04D 29/62 |
· · | of radial or helico-centrifugal pumps

|  | F04D 29/64 |
· · | of axial pumps

|  | F04D 29/66 |
· | Combating cavitation, whirls, noise, vibration, or the like (gas-flow silencers for machines or engines in general Fulltext... Hierarchy... Expanded...F01N); Balancing (surge control Fulltext... Hierarchy... Expanded...F04D 27/02)

|  | F04D 29/68 |
· · | by influencing boundary layers

|  | F04D 29/70 |
· | Suction grids; Strainers; Dust separation; Cleaning

|  | F04D 31/00 - F04D 33/00 |
Other non-positive-displacement pumps

|  | F04D 31/00 |
Pumping liquids and elastic fluids at the same time

|  | F04D 33/00 |
Non-positive-displacement pumps with other than pure rotation, e.g. of oscillating type (hand-held fans Fulltext... Hierarchy... Expanded...A45B)