F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
ENGINES OR PUMPS
F04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS

Note(s)

  • Combinations of positive-displacement and non-positive-displacement pumps are classified in subclass F04B as a general subclass for pumps, and in subclasses F04C, F04D in respect of matter specific to those subclasses.
F04C
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines driven by liquids F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M)

Note(s)

  • 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 FOR LIQUIDS; PUMPS FOR LIQUIDS OR FOR LIQUIDS AND ELASTIC FLUIDS
Rotary-piston
general characteristics; non-parallel axes of movement of co-operating members 2/00, 3/00
resiliently-deformable chamber walls; fluid ring 5/00, 7/00
Oscillating-piston 9/00
Combinations or adaptations 11/00, 13/00
Pump installations 11/00
Control; monitoring; safety arrangements 14/00
Other details or accessories 15/00
PUMPS SPECIALLY ADAPTED FOR ELASTIC FLUIDS
Rotary-piston pumps 18/00
Rotary-piston pumps with fluid ring or the like 19/00
Oscillating-piston pumps 21/00
Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type; Pumping installations; Multi-stage pumps 23/00
Adaptations of pumps for special use 25/00
Sealing arrangements in rotary-piston pumps 27/00
Control; monitoring; safety arrangements 28/00
Other components parts, details or accessories 29/00
Machines for liquids; Pumps for liquids or for liquids and elastic fluids [2011.01]
F04C 2/00
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 pumps specially adapted for elastic fluids F04C 18/00, F04C 19/00; rotary-piston machines or pumps in which the working-fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F04B) [2006.01]

Note(s) [3]

F04C 2/02
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 [2006.01]
F04C 2/04
of internal-axis type [2006.01]
F04C 2/06
of other than internal-axis type (F04C 2/063 takes precedence) [2006.01]
F04C 2/063
with coaxially-mounted members having continuously-changing circumferential spacing between them [2006.01]
F04C 2/067
having cam-and-follower type drive [2006.01]
F04C 2/07
having crankshaft-and-connecting-rod type drive [2006.01]
F04C 2/073
having pawl-and-ratchet type drive [2006.01]
F04C 2/077
having toothed-gearing type drive [2006.01]
F04C 2/08
of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [2006.01]
F04C 2/10
of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member [2006.01]
F04C 2/107
with helical teeth [2006.01]
F04C 2/113
the inner member carrying rollers intermeshing with the outer member [2006.01]
F04C 2/12
of other than internal-axis type [2006.01]
F04C 2/14
F04C 2/16
with helical teeth, e.g. chevron-shaped, screw type [2006.01]
F04C 2/18
with similar tooth forms (F04C 2/16 takes precedence) [2006.01]
F04C 2/20
with dissimilar tooth forms (F04C 2/16 takes precedence) [2006.01]
F04C 2/22
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 [2006.01]
F04C 2/24
of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions [2006.01]
F04C 2/26
of internal-axis type [2006.01]
F04C 2/28
of other than internal-axis type [2006.01]
F04C 2/30
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 [2006.01]
F04C 2/32
having both the movement defined in group F04C 2/02 and relative reciprocation between the co-operating members [2006.01]
F04C 2/324
with vanes hinged to the inner member and reciprocating with respect to the outer member [2006.01]
F04C 2/328
and hinged to the outer member [2006.01]
F04C 2/332
with vanes hinged to the outer member and reciprocating with respect to the inner member [2006.01]
F04C 2/336
and hinged to the inner member [2006.01]
F04C 2/34
having the movement defined in group F04C 2/08 or F04C 2/22 and relative reciprocation between the co-operating members [2006.01]
F04C 2/344
with vanes reciprocating with respect to the inner member [2006.01]
F04C 2/348
the vanes positively engaging, with circumferential play, an outer rotatable member [2006.01]
F04C 2/352
the vanes being pivoted on the axis of the outer member [2006.01]
F04C 2/356
with vanes reciprocating with respect to the outer member [2006.01]
F04C 2/36
having both the movements defined in groups F04C 2/22 and F04C 2/24 [2006.01]
F04C 2/38
having the movement defined in group F04C 2/02 and having a hinged member (F04C 2/32 takes precedence) [2006.01]
F04C 2/39
with vanes hinged to the inner as well as to the outer member [2006.01]
F04C 2/40
having the movement defined in group F04C 2/08 or F04C 2/22 and having a hinged member [2006.01]
F04C 2/44
with vanes hinged to the inner member [2006.01]
F04C 2/46
with vanes hinged to the outer member [2006.01]
F04C 3/00
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; rotary-piston pumps with non-parallel axes of movement of co-operating members specially adapted for elastic fluids F04C 18/48) [2006.01]
F04C 3/02
the axes being arranged at an angle of 90 degrees [2006.01]
F04C 3/04
of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [2006.01]
F04C 3/06
the axes being arranged otherwise than at an angle of 90 degrees [2006.01]
F04C 3/08
of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [2006.01]
F04C 5/00
Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable (such pumps specially adapted for elastic fluids F04C 18/00) [2006.01]
F04C 7/00
Rotary-piston machines or pumps with fluid ring or the like (such pumps specially adapted for elastic fluids F04C 19/00) [2006.01]
F04C 9/00
Oscillating-piston machines or pumps (such pumps specially adapted for elastic fluids F04C 21/00) [2006.01]
F04C 11/00
Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type (combinations of such pumps specially adapted for elastic fluids F04C 23/00); Pumping installations (F04C 13/00 takes precedence; specially adapted for elastic fluids F04C 23/00; fluid gearing  F16H 39/00-F16H 47/00) [2006.01]
F04C 13/00
Adaptations of machines or pumps for special use, e.g. for extremely high pressures (of pumps specially adapted for elastic fluids F04C 25/00) [2006.01]
F04C 14/00
Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations (of pumps or pumping installations specially adapted for elastic fluids F04C 28/00) [2006.01]
F04C 14/02
specially adapted for several machines or pumps connected in series or in parallel [2006.01]
F04C 14/04
specially adapted for reversible machines or pumps [2006.01]
F04C 14/06
specially adapted for stopping, starting, idling or no-load operation [2006.01]
F04C 14/08
characterised by varying the rotational speed [2006.01]
F04C 14/10
characterised by changing the positions of the inlet or outlet openings with respect to the working chamber [2006.01]
F04C 14/12
using sliding valves [2006.01]
F04C 14/14
using rotating valves [2006.01]
F04C 14/16
using lift valves [2006.01]
F04C 14/18
characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C 14/10) [2006.01]
F04C 14/20
by changing the form of the inner or outer contour of the working chamber [2006.01]
F04C 14/22
by changing the eccentricity between cooperating members [2006.01]
F04C 14/24
characterised by using valves controlling pressure or flow rate, e.g. discharge valves (F04C 14/10 takes precedence) [2006.01]
F04C 14/26
using bypass channels [2006.01]
F04C 14/28
Safety arrangements; Monitoring [2006.01]
F04C 15/00
Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C 2/00-F04C 14/00 (of pumps specially adapted for elastic fluids F04C 18/00-F04C 29/00) [2006.01]
F04C 15/06
Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet [2006.01]
Pumps specially adapted for elastic fluids
F04C 18/00
Rotary-piston pumps specially adapted for elastic fluids (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) [2006.01]

Note(s) [5]

F04C 18/02
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 [2006.01]
F04C 18/04
of internal-axis type [2006.01]
F04C 18/06
of other than internal-axis type (F04C 18/063 takes precedence) [2006.01]
F04C 18/063
with coaxially-mounted members having continuously-changing circumferential spacing between them [2006.01]
F04C 18/067
having cam-and-follower type drive [2006.01]
F04C 18/07
having crankshaft-and-connecting-rod type drive [2006.01]
F04C 18/073
having pawl-and-ratchet type drive [2006.01]
F04C 18/077
having toothed-gearing type drive [2006.01]
F04C 18/08
of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [2006.01]
F04C 18/10
of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member [2006.01]
F04C 18/107
with helical teeth [2006.01]
F04C 18/113
the inner member carrying rollers intermeshing with the outer member [2006.01]
F04C 18/12
of other than internal-axis type [2006.01]
F04C 18/14
F04C 18/16
with helical teeth, e.g. chevron-shaped, screw type [2006.01]
F04C 18/18
with similar tooth forms (F04C 18/16 takes precedence) [2006.01]
F04C 18/20
with dissimilar tooth forms (F04C 18/16 takes precedence) [2006.01]
F04C 18/22
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 [2006.01]
F04C 18/24
of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions [2006.01]
F04C 18/26
of internal-axis type [2006.01]
F04C 18/28
of other than internal-axis type [2006.01]
F04C 18/30
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 [2006.01]
F04C 18/32
having both the movement defined in group F04C 18/02 and relative reciprocation between the co-operating members [2006.01]
F04C 18/324
with vanes hinged to the inner member and reciprocating with respect to the outer member [2006.01]
F04C 18/328
and hinged to the outer member [2006.01]
F04C 18/332
with vanes hinged to the outer member and reciprocating with respect to the inner member [2006.01]
F04C 18/336
and hinged to the inner member [2006.01]
F04C 18/34
having the movement defined in group F04C 18/08 or F04C 18/22 and relative reciprocation between the co-operating members [2006.01]
F04C 18/344
with vanes reciprocating with respect to the inner member [2006.01]
F04C 18/348
the vanes positively engaging, with circumferential play, an outer rotatable member [2006.01]
F04C 18/352
the vanes being pivoted on the axis of the outer member [2006.01]
F04C 18/356
with vanes reciprocating with respect to the outer member [2006.01]
F04C 18/36
having both the movements defined in groups F04C 18/22 and F04C 18/24 [2006.01]
F04C 18/38
having the movement defined in group F04C 18/02 and having a hinged member (F04C 18/32 takes precedence) [2006.01]
F04C 18/39
with vanes hinged to the inner as well as to the outer member [2006.01]
F04C 18/40
having the movement defined in group F04C 18/08 or F04C 18/22 and having a hinged member [2006.01]
F04C 18/44
with vanes hinged to the inner member [2006.01]
F04C 18/46
with vanes hinged to the outer member [2006.01]
F04C 18/48
Rotary-piston pumps with non-parallel axes of movement of co-operating members [2006.01]

Note(s) [2006.01]

F04C 18/50
the axes being arranged at an angle of 90 degrees [2006.01]
F04C 18/52
of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [2006.01]
F04C 18/54
the axes being arranged otherwise than at an angle of 90 degrees [2006.01]
F04C 18/56
of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [2006.01]
F04C 19/00
Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids [2006.01]
F04C 21/00
Oscillating-piston pumps specially adapted for elastic fluids [2006.01]
F04C 23/00
Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (F04C 25/00 takes precedence) [2006.01]
F04C 23/02
Pumps characterised by combination with, or adaptation to, specific driving engines or motors (predominant aspects of the engines or motors, see the relevant classes) [2006.01]
F04C 25/00
Adaptations for special use of pumps for elastic fluids [2006.01]
F04C 25/02
for producing high vacuum (sealing arrangements F04C 27/00; silencing F04C 29/06) [2006.01]
F04C 27/00
Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids [2006.01]
F04C 27/02
Liquid sealing for high-vacuum pumps [2006.01]
F04C 28/00
Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids [2006.01]
F04C 28/02
specially adapted for several pumps connected in series or in parallel [2006.01]
F04C 28/04
specially adapted for reversible pumps [2006.01]
F04C 28/06
specially adapted for stopping, starting, idling or no-load operation [2006.01]
F04C 28/08
characterised by varying the rotational speed [2006.01]
F04C 28/10
characterised by changing the positions of the inlet or outlet openings with respect to the working chamber [2006.01]
F04C 28/12
using sliding valves [2006.01]
F04C 28/14
using rotating valves [2006.01]
F04C 28/16
using lift valves [2006.01]
F04C 28/18
characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C 28/10) [2006.01]
F04C 28/20
by changing the form of the inner or outer contour of the working chamber [2006.01]
F04C 28/22
by changing the eccentricity between cooperating members [2006.01]
F04C 28/24
characterised by using valves controlling pressure or flow rate, e.g. discharge valves (F04C 28/10 takes precedence) [2006.01]
F04C 28/26
using bypass channels [2006.01]
F04C 28/28
Safety arrangements; Monitoring [2006.01]
F04C 29/00
Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups F04C 18/00-F04C 28/00 [2006.01]
F04C 29/02
Lubrication; Lubricant separation [2006.01]
F04C 29/04
Heating; Cooling; Heat insulation [2006.01]
F04C 29/06
Silencing [2006.01]
F04C 29/12
Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet [2006.01]