|  | 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.

|  | F04B |
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type Fulltext... Hierarchy... Expanded...F04C; non-positive-displacement pumps Fulltext... Hierarchy... Expanded...F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped Fulltext... Hierarchy... Expanded...F04F; crankshafts, crossheads, connecting-rods Fulltext... Hierarchy... Expanded...F16C; flywheels Fulltext... Hierarchy... Expanded...F16F; gearings for interconverting rotary motion and reciprocating motion in general Fulltext... Hierarchy... Expanded...F16H; pistons, piston-rods, cylinders, in general Fulltext... Hierarchy... Expanded...F16J)

|  | F04B |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards the definitions of "machines", "pumps", and 'positive-displacement".

|  | F04B 1/00 - F04B 23/00 |
Pumps for liquids or for liquid and elastic fluids; Positive-displacement machines for liquids (having flexible working members Fulltext... Hierarchy... Expanded...F04B 43/00; pumps for raising fluids from great depths Fulltext... Hierarchy... Expanded...F04B 47/00)

|  | F04B 1/00 |
Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (Fulltext... Hierarchy... Expanded...F04B 3/00 takes precedence; fluid-driven pumps Fulltext... Hierarchy... Expanded...F04B 9/08)

|  | F04B 1/02 |
· | having two cylinders (in V-arrangement Fulltext... Hierarchy... Expanded...F04B 1/04)

|  | F04B 1/04 |
· | having cylinders in V-, star-, or fan-arrangement

|  | F04B 1/06 |
· · | Control (control of reciprocating machines or pumps in general Fulltext... Hierarchy... Expanded...F04B 49/00)

|  | F04B 1/08 |
· · · | regulated by delivery pressure

|  | F04B 1/10 |
· | the cylinders being movable, e.g. rotary

|  | F04B 1/12 |
· | having cylinders axes coaxial with, or parallel or inclined to, main shaft axis

|  | F04B 1/14 |
· · | having stationary cylinders

|  | F04B 1/16 |
· · · | having two or more sets of cylinders or pistons

|  | F04B 1/18 |
· · · | having self-acting distribution members, i.e. actuated by working fluid

|  | F04B 1/20 |
· · | having rotary cylinder block

|  | F04B 1/22 |
· · · | having two or more sets of cylinders or pistons

|  | F04B 1/24 |
· · · · | inclined to main shaft axis

|  | F04B 1/26 |
· · | Control (control of reciprocating machines or pumps in general Fulltext... Hierarchy... Expanded...F04B 49/00)

|  | F04B 1/28 |
· · · | for machines or pumps with stationary cylinders

|  | F04B 1/30 |
· · · | for machines or pumps with rotary cylinder block

|  | F04B 3/00 |
Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage

|  | F04B 5/00 |
Machines or pumps with differential-surface pistons

|  | F04B 7/00 |
Machines or pumps characterised by having positively-driven distribution members (with cylinders in V-, star-, or fan-arrangement Fulltext... Hierarchy... Expanded...F04B 1/04; with cylinder axes coaxial with, or parallel or inclined to, main shaft axis Fulltext... Hierarchy... Expanded...F04B 1/12)

|  | F04B 7/02 |
· | the members being fluid-actuated

|  | F04B 7/04 |
· · | in which the pistons and cylinders coact to open and close intake or outlet ports

|  | F04B 7/06 |
· · · | the pistons and cylinders being relatively reciprocated and rotated

|  | F04B 9/00 |
Machines or pumps characterised by the driving or driven means to or from their working members (gearing per se Fulltext... Hierarchy... Expanded...F16H)

|  | F04B 9/02 |
· | the means being mechanical

|  | F04B 9/04 |
· · | the means being cams, eccentrics, or pin-and-slot mechanisms (with cylinder axes coaxial with, or parallel or inclined to, main shaft axis Fulltext... Hierarchy... Expanded...F04B 1/12)

|  | F04B 9/06 |
· · | the means including spring- or weight-loaded lost-motion devices

|  | F04B 9/08 |
· | the means being fluid

|  | F04B 9/10 |
· · | the fluid being liquid

|  | F04B 9/12 |
· · | the fluid being elastic, e.g. steam

|  | F04B 9/14 |
· | Pumps characterised by muscle-power operation

|  | F04B 11/00 |
Equalisation of pulses, e.g. by use of air vessels; Counter-acting cavitation

|  | F04B 13/00 |
Pumps specially modified to deliver fixed or variable measured quantities (for transferring liquid from bulk storage containers or reservoirs into vehicles or into portable containers Fulltext... Hierarchy... Expanded...B67D 5/40)

|  | F04B 13/02 |
· | of two or more fluids at the same time

|  | F04B 15/00 |
Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts

|  | F04B 15/02 |
· | the fluids being viscous or non-homogeneous

|  | F04B 15/04 |
· | the fluids being hot or corrosive (Fulltext... Hierarchy... Expanded...F04B 15/06 takes precedence)

|  | F04B 15/06 |
· | for liquids near their boiling point, e.g. under subnormal pressure

|  | F04B 15/08 |
· · | the liquids having low boiling points

|  | F04B 17/00 |
Pumps characterised by combination with, or adaptation to, specific driving engines or motors

|  | F04B 17/02 |
· | driven by wind motors

|  | F04B 17/04 |
· | using solenoids

|  | F04B 17/06 |
· | Mobile combinations

|  | F04B 19/00 |
Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F04B 1/00-F04B 17/00

|  | F04B 19/02 |
· | having movable cylinders

|  | F04B 19/04 |
· | Pumps for special use (for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers Fulltext... Hierarchy... Expanded...B67D 5/40)

|  | F04B 19/06 |
· | Pumps for delivery of both liquid and elastic fluids at the same time (wet gas pumps Fulltext... Hierarchy... Expanded...F04B 37/20)

|  | F04B 19/08 |
· | Scoop devices

|  | F04B 19/10 |
· · | of wheel type

|  | F04B 19/12 |
· · | of helical or screw type

|  | F04B 19/14 |
· · | of endless-chain type, e.g. with the chains carrying pistons co-operating with open-ended cylinders

|  | F04B 19/16 |
· | Adhesion-type liquid-lifting devices

|  | F04B 19/18 |
· · | Adhesion members therefor

|  | F04B 19/20 |
· | Other positive-displacement pumps

|  | F04B 19/22 |
· · | of reciprocating-piston type

|  | F04B 19/24 |
· · | Pumping by heat expansion of pumped fluid

|  | F04B 21/00 |
Component parts, details, or accessories, not provided for in, or of interest apart from, groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F04B 1/00-F04B 19/00 (for controlling Fulltext... Hierarchy... Expanded...F04B 49/00)

|  | F04B 21/02 |
· | Adaptations or arrangements of valves (arranged in pistons Fulltext... Hierarchy... Expanded...F04B 21/04; used as foot valves Fulltext... Hierarchy... Expanded...F04B 21/06)

|  | F04B 21/04 |
· | Adaptations of pistons

|  | F04B 21/06 |
· | Adaptations or arrangements of valves used as foot valves, of suction strainers, or of mud-boxes

|  | F04B 21/08 |
· | Adaptations of cylinders

|  | F04B 23/00 |
Pumping installations or systems (Fulltext... Hierarchy... Expanded...F04B 17/00 takes precedence)

|  | F04B 23/02 |
· | having reservoirs

|  | F04B 23/04 |
· | Combinations of two or more pumps

|  | F04B 23/06 |
· · | the pumps being all of reciprocating positive-displacement type

|  | F04B 23/08 |
· · | the pumps being of different types

|  | F04B 23/10 |
· · · | at least one pump being of the reciprocating positive-displacement type

|  | F04B 23/12 |
· · · | at least one pump being of the rotary-piston positive-displacement type (Fulltext... Hierarchy... Expanded...F04B 23/10 takes precedence)

|  | F04B 23/14 |
· · · | at least one pump being of the non-positive-displacement type (Fulltext... Hierarchy... Expanded...F04B 23/10, Fulltext... Hierarchy... Expanded...F04B 23/12 take precedence)

|  | F04B 25/00 - F04B 41/00 |
Pumps specially adapted for elastic fluids (having a flexible working member Fulltext... Hierarchy... Expanded...F04B 45/00; for raising fluid from great depths Fulltext... Hierarchy... Expanded...F04B 47/00)

|  | F04B 25/00 |
Multi-cylinder pumps

|  | F04B 25/02 |
· | of stepped-piston type

|  | F04B 25/04 |
· | having cylinders coaxial with, or parallel or inclined to, main shaft axis

|  | F04B 27/00 |
Multi-cylinder pumps characterised by number or arrangement of cylinders (Fulltext... Hierarchy... Expanded...F04B 25/00 takes precedence)

|  | F04B 27/02 |
· | having cylinders arranged oppositely relative to main shaft

|  | F04B 27/04 |
· | having cylinders in V-, fan-, or star-arrangement

|  | F04B 27/06 |
· · | the cylinders being movable, e.g. rotary

|  | F04B 27/08 |
· | having cylinders coaxial with, or parallel or inclined to, main shaft axis

|  | F04B 29/00 |
Other pumps with movable, e.g. rotatable, cylinders

|  | F04B 31/00 |
Free-piston pumps; Systems incorporating such pumps (muscle-driven pumps in which the stroke is not defined by gearing Fulltext... Hierarchy... Expanded...F04B 33/00; free-piston combustion engines, free-piston gas generators Fulltext... Hierarchy... Expanded...F02B 71/00; systems predominated by prime mover aspects, see the relevant class for the prime mover)

|  | F04B 33/00 |
Pumps actuated by muscle power, e.g. for inflating

|  | F04B 33/02 |
· | with intermediate gearing

|  | F04B 35/00 |
Pumps characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for (predominant aspects of the engines or motors, see the relevant classes)

|  | F04B 35/02 |
· | having fluid transmitting link

|  | F04B 35/04 |
· | having electric drive

|  | F04B 35/06 |
· | Mobile combinations

|  | F04B 37/00 |
Pumps having pertinent characteristics not provided for in, or of interest apart from, groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F04B 25/00-F04B 35/00

|  | F04B 37/02 |
· | for evacuating by absorption or adsorption (absorption or adsorption in general Fulltext... Hierarchy... Expanded...B01J)

|  | F04B 37/04 |
· · | Selection of specific absorption or adsorption materials

|  | F04B 37/06 |
· | for evacuating by thermal means

|  | F04B 37/08 |
· · | by condensing or freezing

|  | F04B 37/10 |
· | for special use (Fulltext... Hierarchy... Expanded...F04B 37/02, Fulltext... Hierarchy... Expanded...F04B 37/06 take precedence)

|  | F04B 37/12 |
· · | to obtain high pressure

|  | F04B 37/14 |
· · | to obtain high vacuum

|  | F04B 37/16 |
· · · | Means for nullifying unswept space

|  | F04B 37/18 |
· · | for specific elastic fluids

|  | F04B 37/20 |
· · · | for wet gases, e.g. wet air

|  | F04B 39/00 |
Component parts, details, or accessories, of pumps or pumping systems, not otherwise provided for in, or of interest apart from, groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F04B 25/00-F04B 37/00 (for controlling Fulltext... Hierarchy... Expanded...F04B 47/00)

|  | F04B 39/02 |
· | Lubrication (of machines or engines in general Fulltext... Hierarchy... Expanded...F01M)

|  | F04B 39/04 |
· | Measures to avoid lubricant contaminating the pumped fluid

|  | F04B 39/06 |
· | Cooling (of machines or engines in general Fulltext... Hierarchy... Expanded...F01P); Heating; Prevention of freezing

|  | F04B 39/08 |
· | Actuation of distribution members

|  | F04B 39/10 |
· | Adaptations or arrangements of distribution members

|  | F04B 39/12 |
· | Casings (casings for machines or engines in general Fulltext... Hierarchy... Expanded...F16M); Cylinders; Cylinder heads; Fluid connections

|  | F04B 39/14 |
· | Provisions for readily assembling or disassembling

|  | F04B 39/16 |
· | Filtration; Moisture separation

|  | F04B 41/00 |
Pumping installations or systems (Fulltext... Hierarchy... Expanded...F04B 31/00, Fulltext... Hierarchy... Expanded...F04B 35/00 take precedence)

|  | F04B 41/02 |
· | having reservoirs

|  | F04B 41/04 |
· | Conversion of internal-combustion engine cylinder units to pumps

|  | F04B 41/06 |
· | Combinations of two or more pumps

|  | F04B 43/00 - F04B 45/00 |
Machines or pumps having flexible working members

|  | F04B 43/00 |
Machines, pumps, or pumping installations having flexible working members (pumps or pumping installations specially adapted for elastic fluids Fulltext... Hierarchy... Expanded...F04B 45/00)

|  | F04B 43/02 |
· | having plate-like flexible members, e.g. diaphragms

|  | F04B 43/04 |
· · | Pumps having electric drive

|  | F04B 43/06 |
· · | Pumps having fluid drive

|  | F04B 43/08 |
· | having tubular flexible members (Fulltext... Hierarchy... Expanded...F04B 43/12 takes precedence)

|  | F04B 43/10 |
· · | Pumps having fluid drive

|  | F04B 43/12 |
· | having peristaltic action

|  | F04B 45/00 |
Pumps or pumping installations having flexible working members and specially adapted for elastic fluids

|  | F04B 45/02 |
· | Bellows

|  | F04B 45/04 |
· | having plate-like flexible members, e.g. diaphragms

|  | F04B 45/06 |
· | having tubular flexible members (Fulltext... Hierarchy... Expanded...F04B 45/02 takes precedence)

|  | F04B 45/08 |
· · | having peristaltic action

|  | F04B 47/00 |
Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps (by using positive or negative pressurised fluid medium acting directly on the liquid to be pumped Fulltext... Hierarchy... Expanded...F04F 1/00)

|  | F04B 47/02 |
· | the driving mechanisms being situated at ground level (Fulltext... Hierarchy... Expanded...F04B 47/12 takes precedence)

|  | F04B 47/04 |
· · | the driving means incorporating fluid means

|  | F04B 47/06 |
· | having motor-pump units situated at great depth

|  | F04B 47/08 |
· · | the motors being actuated by fluid

|  | F04B 47/10 |
· · · | the units or parts thereof being liftable to ground level by fluid pressure

|  | F04B 47/12 |
· | having free plunger lifting the fluid to the surface

|  | F04B 47/14 |
· | Counterbalancing

|  | F04B 49/00 |
Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F04B 1/00-F04B 47/00

|  | F04B 49/02 |
· | Stopping, starting, unloading, or idling control

|  | F04B 49/04 |
· | Regulating by means of floats

|  | F04B 49/06 |
· | Control using electricity (regulating by means of floats actuating electric switches Fulltext... Hierarchy... Expanded...F04B 49/04)

|  | F04B 49/08 |
· | Regulating by delivery pressure

|  | F04B 49/10 |
· | Other safety measures

|  | F04B 51/00 |
Testing machines, pumps, or pumping installations