IPC 6 English version F04B !A-F04B 19/24

F04-F04B01924

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 A 62 C 11/00, with power-driven pumps A 62 C 25/00; charging or scavenging combustion engines by pumps F 02 B; engine fuel-injection pumps F 02 M; ion pumps H 01 J 41/12; electrodynamic pumps H 02 K 44/02)

F 04 B

POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F 04 C; non-positive-displacement pumps F 04 D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F 04 F; crankshafts, crossheads, connecting-rods F 16 C; flywheels F 16 F; gearings for interconverting rotary motion and reciprocating motion in general F 16 H; pistons, piston-rods, cylinders, in general F 16 J)

Notes

(1)

In this subclass, the following term is used with the meaning indicated:

–

"piston" also covers a plunger.

(2)

Attention is drawn to the Notes preceding class F 01, especially as regards the definitions of "machines", "pumps", and "positive-displacement".

Pumps for liquids or for liquid and elastic fluids; Positive-displacement machines for liquids (having flexible working members F 04 B 43/00; pumps for raising fluids from great depths F 04 B 47/00)

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (F 04 B 3/00 takes precedence; fluid-driven pumps F 04 B 9/08; control of reciprocating machines or pumps in general F 04 B 49/00)

having two cylinders (in V-arrangement F 04 B 1/04)

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

047

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

053

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

Control

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

regulated by delivery pressure

the cylinders being movable, e.g. rotary [6]

107

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

113

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

having cylinder axes coaxial with, or parallel or inclined to, main shaft axis

having stationary cylinders

having two or more sets of cylinders or pistons

having self-acting distribution members, i.e. actuated by working fluid

having rotary cylinder block

having two or more sets of cylinders or pistons

inclined to main shaft axis

Control

for machines or pumps with stationary cylinders

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

for machines or pumps with rotary cylinder block

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

Control not provided for in a single group of groups F 04 B 1/02 to F 04 B 1/32 [6]

Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage

Machines or pumps with differential-surface pistons

with double-acting pistons [6]

Piston machines or pumps characterised by having positively-driven valving (with cylinders in star- or fan-arrangement F 04 B 1/04; with cylinder axes coaxial with, or parallel or inclined to, main shaft axis F 04 B 1/12)

the valving being fluid-actuated

in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports [3]

the pistons and cylinders being relatively reciprocated and rotated [3]

Piston machines or pumps characterised by the driving or driven means to or from their working members

the means being mechanical

the means being cams, eccentrics, or pin-and-slot mechanisms (with cylinder axes coaxial with, or parallel or inclined to, main shaft axis F 04 B 1/12)

the means including spring- or weight-loaded lost-motion devices

the means being fluid

the fluid being liquid

103

having only one pumping chamber [6]

105

reciprocating movement of the pumping member being obtained by a double-acting liquid motor [6]

107

rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring [6]

109

having plural pumping chambers [6]

111

with two mechanically connected pumping members [6]

113

reciprocating movement of the pumping members being obtained by a double-acting liquid motor [6]

115

reciprocating movement of the pumping members being obtained by two single-acting liquid motors, each acting in one direction [6]

117

the pumping members not being mechanically connected to each other [6]

the fluid being elastic, e.g. steam or air

123

having only one pumping chamber [6]

125

reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor [6]

127

rectilinear movement of the pumping member in the working direction being obtained by a single-acting elastic-fluid motor, e.g. actuated in the other direction by gravity or a spring [6]

129

having plural pumping chambers [6]

131

with two mechanically connected pumping members [6]

133

reciprocating movement of the pumping members being obtained by a double-acting elastic-fluid motor [6]

135

reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction [6]

137

the pumping members not being mechanically connected to each other [6]

Pumps characterised by muscle-power operation

11/

Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation

13/

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 B 67 D 5/40)

13/

of two or more fluids at the same time

15/

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

15/

the fluids being viscous or non-homogeneous

15/

the fluids being hot or corrosive (F 04 B 15/06 takes precedence)

15/

for liquids near their boiling point, e.g. under subnormal pressure

15/

the liquids having low boiling points

17/

Pumps characterised by combination with, or adaptation to, specific driving engines or motors

17/

driven by wind motors

17/

driven by electric motors [6]

17/

using solenoids [6]

17/

driven by internal-combustion engines [6]

17/

Mobile combinations

19/

Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F 04 B 1/00 to F 04 B 17/00

19/

having movable cylinders

19/

Pumps for special use (for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers B 67 D 5/40)

19/

Pumps for delivery of both liquid and elastic fluids at the same time (wet gas pumps F 04 B 37/20) [6]

19/

Scoop devices

19/

of wheel type

19/

of helical or screw type

19/

of endless-chain type, e.g. with the chains carrying pistons co-operating with open-ended cylinders

19/

Adhesion-type liquid-lifting devices

19/

Adhesion members therefor

19/

Other positive-displacement pumps

19/

of reciprocating-piston type

19/

Pumping by heat expansion of pumped fluid

F04B 21/00 - F04B 53/22