IPC 7 English version F04B 23/00-F04B 53/22

F04B02300-F04B05322

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

F 04

POSITIVE-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 B

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

23/

Pumping installations or systems (F04B 17/00 takes precedence)

23/

having reservoirs

23/

Combinations of two or more pumps

23/

the pumps being all of reciprocating positive-displacement type

23/

the pumps being of different types

23/

at least one pump being of the reciprocating positive-displacement type

23/

at least one pump being of the rotary-piston positive-displacement type (F04B 23/10 takes precedence)

23/

at least one pump being of the non-positive-displacement type (F04B 23/10, F04B 23/12 take precedence)

Pumps specially adapted for elastic fluids (having a flexible working member F04B 45/00; for raising fluid from great depths F04B 47/00)

25/

Multi-stage pumps

25/

of stepped-piston type

25/

having cylinders coaxial with, or parallel or inclined to, main shaft axis

27/

Multi-cylinder pumps characterised by number or arrangement of cylinders (F04B 25/00 takes precedence; control of reciprocating machines or pumps in general F04B 49/00)

27/

having cylinders arranged oppositely relative to main shaft

27/

having cylinders in star- or fan-arrangement [6]

27/

047

with an actuating element at the outer ends of the cylinders [6]

27/

053

with an actuating element at the inner ends of the cylinders [6]

27/

the cylinders being movable, e.g. rotary

27/

067

Control [6]

27/

073

by varying the relative eccentricity between two members, e.g. a cam and a drive shaft [6]

27/

having cylinders coaxial with, or parallel or inclined to, main shaft axis

27/

having stationary cylinders [6]

27/

having plural sets of cylinders or pistons [6]

27/

Control [6]

27/

of pumps with stationary cylinders [6]

27/

by varying the relative positions of a swash plate and a cylinder block [6]

27/

of pumps with rotary cylinder block [6]

27/

by varying the relative positions of a swash plate and a cylinder block [6]

27/

Control not provided for in a single group of groups F04B 27/02 to F04B 27/22 [6]

31/

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

33/

Pumps actuated by muscle power, e.g. for inflating

33/

with intermediate gearing

35/

Piston 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)

35/

the means being mechanical [6]

35/

the means being fluid

35/

the means being electric

35/

Mobile combinations

37/

Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B 25/00 to F04B 35/00

37/

for evacuating by absorption or adsorption (absorption or adsorption in general B01J)

37/

Selection of specific absorption or adsorption materials

37/

for evacuating by thermal means

37/

by condensing or freezing, e.g. cryogenic pumps (cold traps B01D 8/00)

37/

for special use (F04B 37/02, F04B 37/06 take precedence)

37/

to obtain high pressure

37/

to obtain high vacuum

37/

Means for nullifying unswept space

37/

for specific elastic fluids

37/

for wet gases, e.g. wet air

39/

Component parts, details, or accessories, of pumps or pumping systems, not otherwise provided for in, or of interest apart from, groups F04B 25/00 to F04B 37/00 (for controlling F04B 49/00)

39/

Lubrication (of machines or engines in general F01M)

39/

Measures to avoid lubricant contaminating the pumped fluid

39/

Cooling (of machines or engines in general F01P); Heating; Prevention of freezing

39/

Actuation of distribution members

39/

Adaptation or arrangement of distribution members

39/

Casings (casings for machines or engines in general F16M); Cylinders; Cylinder heads; Fluid connections

39/

Provisions for readily assembling or disassembling

39/

Filtration; Moisture separation

41/

Pumping installations or systems (F04B 31/00, F04B 35/00 take precedence)

41/

having reservoirs

41/

Conversion of internal-combustion engine cylinder units to pumps

41/

Combinations of two or more pumps

Machines or pumps having flexible working members

43/

Machines, pumps, or pumping installations having flexible working members (pumps or pumping installations specially adapted for elastic fluids F04B 45/00)

43/

having plate-like flexible members, e.g. diaphragms (F04B 43/14 takes precedence) [3]

43/

Pumps having electric drive

43/

Pumps having fluid drive

43/

067

the fluid being actuated directly by a piston [6]

43/

073

the actuating fluid being controlled by at least one valve [6]

43/

having tubular flexible members (F04B 43/12 takes precedence)

43/

Pumps having electric drive [6]

43/

Pumps having fluid drive

43/

107

the fluid being actuated directly by a piston [6]

43/

113

the actuating fluid being controlled by at least one valve [6]

43/

having peristaltic action

43/

having plate-like flexible members [3]

45/

Pumps or pumping installations having flexible working members and specially adapted for elastic fluids

45/

having bellows

45/

027

having electric drive [6]

45/

033

having fluid drive [6]

45/

having plate-like flexible members, e.g. diaphragms (F04B 45/10 takes precedence) [3]

45/

047

Pumps having electric drive [6]

45/

053

Pumps having fluid drive [6]

45/

having tubular flexible members (F04B 45/02, F04B 45/08 take precedence) [3]

45/

067

Pumps having electric drive [6]

45/

073

Pumps having fluid drive [6]

45/

having peristaltic action [3]

45/

having plate-like flexible members [3]

47/

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 F04F 1/00)

47/

the driving mechanisms being situated at ground level (F04B 47/12 takes precedence)

47/

the driving means incorporating fluid means

47/

having motor-pump units situated at great depth

47/

the motors being actuated by fluid

47/

the units or parts thereof being liftable to ground level by fluid pressure

47/

having free plunger lifting the fluid to the surface

47/

Counterbalancing

49/

Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups F04B 1/00 to F04B 47/00

49/

Stopping, starting, unloading, or idling control (controlled electrically F04B 49/06) [6]

49/

025

by means of floats [6]

49/

by means of valves [6]

49/

035

Bypassing [6]

49/

Regulating by means of floats (F04B 49/025 takes precedence) [6]

49/

Control using electricity (regulating by means of floats actuating electric switches F04B 49/04)

49/

Regulating by delivery pressure

49/

Other safety measures

49/

by varying the length of stroke of the working members [6]

49/

Adjusting abutments located in the path of reciprocation [6]

49/

by adjusting the capacity of dead spaces of working chambers [6]

49/

by changing the effective cross-section of the working surface of the piston [6]

49/

by changing the driving speed (controlled electrically F04B 49/06) [6]

49/

by means of valves (F04B 49/03 takes precedence) [6]

49/

Bypassing [6]

51/

Testing machines, pumps, or pumping installations

53/

Component parts, details or accessories not provided for in, or of interest apart from, groups F04B 1/00 to F04B 23/00 or F04B 39/00 to F04B 47/00 [6]

53/

Packing the free space between cylinders and pistons [6]

53/

Draining [6]

53/

Venting [6]

53/

Cooling (of machines or engines in general F01P); Heating; Preventing freezing [6]

53/

Valves; Arrangement of valves [6]

53/

arranged in or on pistons [6]

53/

Pistons, piston-rods or piston-rod connections [6]

53/

Casings; Cylinders; Cylinder liners or heads; Fluid connections [6]

53/

Lubricating (of machines or engines in general F01M) [6]

53/

Filtering [6]

53/

Arrangements for enabling ready assembly or disassembly [6]

F04 - F04B 19/24