IPC 7 English version F04C !A-F04C 29/10

F04C-F04C02910

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 C

ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

Note

Attention is drawn to the Notes preceding class F01, especially as regards the definitions of "machines", "pumps", "positive displacement", "rotary-piston machines", "oscillating-piston machines", "rotary piston", "co-operating members", "movement of co-operating members", "teeth or tooth-equivalents", and "internal axis".

Subclass Index

MACHINES OR PUMPS

Rotary-piston

general characteristics; non-parallel axes of movement of co-operating members

F04C 2/00; F04C 3/00

resiliently-deformable chamber walls; fluid ring

F04C 5/00; F04C 7/00

Oscillating-piston

F04C 9/00

Combinations or adaptations

F04C 11/00, F04C 13/00

Other details or accessories

F04C 15/00

Pump installations

F04C 11/00

PUMPS SPECIALLY ADAPTED FOR ELASTIC FLUIDS

Rotary-piston: General characteristics; fluid ring; sealing arrangements

F04C 18/00; F04C 19/00; F04C 27/00

Oscillating-piston

F04C 21/00

Combinations; adaptations

F04C 23/00; F04C 25/00

Other details or accessories

F04C 29/00

Pump installations

F04C 23/00

Rotary-piston, or oscillating-piston, positive-displacement machines or pumps for liquids; Rotary-piston, or oscillating-piston, positive-displacement pumps

Rotary-piston machines or pumps (with non-parallel axes of co-operating members F04C 3/00; with the working-chamber walls at least partly resiliently deformable F04C 5/00; with fluid ring or the like F04C 7/00; rotary-piston machines or pumps in which the working-fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F04B) [3]

Note

Group F04C 2/30 takes precedence over groups F04C 2/02 to F04C 2/28. [3]

of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents [3]

of internal-axis type [3]

of other than internal-axis type (F04C 2/063 takes precedence) [3]

063

with coaxially-mounted members having continuously-changing circumferential spacing between them [3]

067

having cam-and-follower type drive [3]

having crankshaft-and-connecting-rod type drive [3]

073

having pawl-and-ratchet type drive [3]

077

having toothed-gearing type drive [3]

of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [3]

of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member [3]

107

with helical teeth [3]

113

the inner member carrying rollers intermeshing with the outer member [3]

of other than internal-axis type [3]

with toothed rotary pistons [3]

with helical teeth, e.g. chevron-shaped, screw type [3]

with similar tooth forms (F04C 2/16 takes precedence) [3]

with dissimilar tooth forms (F04C 2/16 takes precedence) [3]

of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth-equivalents than the outer member [3]

of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions [3]

of internal-axis type [3]

of other than internal-axis type [3]

having the characteristics covered by two or more of groups F04C 2/02, F04C 2/08, F04C 2/22, F04C 2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members [3]

having both the movement defined in group F04C 2/02 and relative reciprocation between the co-operating members [3]

324

with vanes hinged to the inner member and reciprocating with respect to the outer member [3]

328

and hinged to the outer member [3]

332

with vanes hinged to the outer member and reciprocating with respect to the inner member [3]

336

and hinged to the inner member [3]

having the movement defined in group F04C 2/08 or F04C 2/22 and relative reciprocation between the co-operating members [3]

344

with vanes reciprocating with respect to the inner member [3]

348

the vanes positively engaging, with circumferential play, an outer rotatable member [3]

352

the vanes being pivoted on the axis of the outer member [3]

356

with vanes reciprocating with respect to the outer member [3]

having both the movements defined in groups F04C 2/22 and F04C 2/24 [3]

having the movement defined in group F04C 2/02 and having a hinged member (F04C 2/32 takes precedence) [3]

with vanes hinged to the inner as well as to the outer member [3]

having the movement defined in group F04C 2/08 or F04C 2/22 and having a hinged member [3]

with vanes hinged to the inner member [3]

with vanes hinged to the outer member [3]

Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type (with the working-chamber walls at least partly resiliently deformable F04C 5/00)

the axes being arranged at an angle of 90 degrees [5]

of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [5]

the axes being arranged otherwise than at an angle of 90 degrees [5]

of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [5]

Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable

Rotary-piston machines or pumps with fluid ring or the like

Oscillating-piston machines or pumps

11/

Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations (F04C 13/00 takes precedence; fluid gearing F16H)

13/

Adaptations of machines or pumps for special use, e.g. for extremely high pressures

15/

Component parts, details, or accessories, of machines, pumps, or pumping installations, not provided for in, or of interest apart from, other groups

15/

Control of working-fluid admission or discharge

15/

Other regulation or control

Rotary-piston, or oscillating-piston, positive-displacement pumps specially adapted for elastic fluids

18/

Rotary-piston pumps (with fluid ring or the like F04C 19/00; rotary-piston pumps in which the working-fluid is exclusively displaced by one or more reciprocating pistons F04B) [3]

Note

Group F04C 18/30 takes precedence over groups F04C 18/02 to F04C 18/28 and F04C 18/48 to F04C 18/56. [3,5]

18/

of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents [3]

18/

of internal-axis type [3]

18/

of other than internal-axis type (F04C 18/063 takes precedence) [3]

18/

063

with coaxially-mounted members having continuously-changing circumferential spacing between them [3]

18/

067

having cam-and-follower type drive [3]

18/

having crankshaft-and-connecting-rod type drive [3]

18/

073

having pawl-and-ratchet type drive [3]

18/

077

having toothed-gearing type drive [3]

18/

of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [3]

18/

of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member [3]

18/

107

with helical teeth [3]

18/

113

the inner member carrying rollers intermeshing with the outer member [3]

18/

of other than internal-axis type [3]

18/

with toothed rotary pistons [3]

18/

with helical teeth, e.g. chevron-shaped, screw type [3]

18/

with similar tooth forms (F04C 18/16 takes precedence) [3]

18/

with dissimilar tooth forms (F04C 18/16 takes precedence) [3]

18/

of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions [3]

18/

of internal-axis type [3]

18/

of other than internal-axis type [3]

18/

having the characteristics covered by two or more of groups F04C 18/02, F04C 18/08, F04C 18/22, F04C 18/24, F04C 18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members [3]

18/

having both the movement defined in group F04C 18/02 and relative reciprocation between the co-operating members [3]

18/

324

with vanes hinged to the inner member and reciprocating with respect to the outer member [3]

18/

328

and hinged to the outer member [3]

18/

332

with vanes hinged to the outer member and reciprocating with respect to the inner member [3]

18/

336

and hinged to the inner member [3]

18/

having the movement defined in group F04C 18/08 or F04C 18/22 and relative reciprocation between the co-operating members [3]

18/

344

with vanes reciprocating with respect to the inner member [3]

18/

348

the vanes positively engaging, with circumferential play, an outer rotatable member [3]

18/

352

the vanes being pivoted on the axis of the outer member [3]

18/

356

with vanes reciprocating with respect to the outer member [3]

18/

having both the movements defined in groups F04C 18/22 and F04C 18/24 [3]

18/

having the movement defined in group F04C 18/02 and having a hinged member (F04C 18/32 takes precedence) [3]

18/

with vanes hinged to the inner as well as to the outer member [3]

18/

having the movement defined in group F04C 18/08 or F04C 18/22 and having a hinged member [3]

18/

with vanes hinged to the inner member [3]

18/

with vanes hinged to the outer member [3]

18/

Rotary-piston pumps with non-parallel axes of movement of co-operating members [5]

18/

the axes being arranged at an angle of 90 degrees [5]

18/

of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [5]

18/

the axes being arranged otherwise than at an angle of 90 degrees [5]

18/

of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [5]

19/

Rotary-piston pumps with fluid ring or the like

21/

Oscillating-piston pumps

23/

Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type; Pumping installations; Multi-stage pumps (F04C 25/00 takes precedence)

23/

Pumps characterised by combination with, or adaptation to, specific driving engines or motors (predominant aspects of the engines or motors, see the relevant classes)

25/

Adaptations of pumps for special use

25/

for producing high vacuum (sealing arrangements F04C 27/00; silencing F04C 29/06)

27/

Sealing arrangements in rotary-piston pumps (sealing in general F16J)

27/

Liquid sealing for high-vacuum pumps

29/

Component parts, details, or accessories, of pumps or pumping installations, not provided for in, or of interest apart from, groups F04C 18/00 to F04C 27/00

29/

Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D)

29/

Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L 59/00)

29/

Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N)

29/

Control of working-fluid admission or discharge

29/

Other regulation or control