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 F02B; engine fuel-injection pumps F02M; ion pumps H01J 41/12; electrodynamic pumps H02K 44/02)
 F04

Note(s)

Combinations of positive-displacement and non-positive-displacement pumps are to be found in the following sub-classes: F04B as a general sub-class for pumps; F04C, F04D in respect of matter peculiar to these sub-classes.

 F04C
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
 F04C

Note(s)

Attention is drawn to the notes preceding class F01, especially as regards the meanings 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".

 F04C 2/00 - 
F04C 15/00
Rotary-piston, or oscillating-piston, positive-displacement machines or pumps for liquids; Rotary-piston, or oscillating-piston, positive-displacement pumps
 F04C 1/00
( transferred to F04C 2/00 )
 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 machines or pumps in which the working-fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F04B)  [3]
 F04C 2/02 - 
F04C 2/28

Note(s)

Group F04C 2/30 takes precedence over groups F04C 2/02-F04C 2/28[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  [3]
 F04C 2/04
·  ·  of internal-axis type  [3]
 F04C 2/06
·  ·  of other than internal-axis type  [3]
 F04C 2/063
·  ·  ·  with coaxially-mounted members having continuously-changing circumferential spacing between them  [3]
 F04C 2/067
·  ·  ·  ·  having cam-and-follower type drive  [3]
 F04C 2/07
·  ·  ·  ·  having rankshaft-and-connecting-rod type drive  [3]
 F04C 2/073
·  ·  ·  ·  having pawl-and-ratchet type drive  [3]
 F04C 2/077
·  ·  ·  ·  having toothed-gearing type drive  [3]
 F04C 2/08
·  of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing  [3]
 F04C 2/10
·  ·  of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member  [3]
 F04C 2/107
·  ·  ·  with helical teeth  [3]
 F04C 2/113
·  ·  ·  the inner member carrying rollers intermeshing with the outer member  [3]
 F04C 2/12
·  ·  of other than internal-axis type  [3]
 F04C 2/14
·  ·  ·  with toothed rotary pistons  [3]
 F04C 2/16
·  ·  ·  ·  with helical teeth, e.g. chevron-shaped, screw type  [3]
 F04C 2/18
·  ·  ·  ·  with similar tooth forms (F04C 2/16 takes precedence)  [3]
 F04C 2/20
·  ·  ·  ·  with dissimilar tooth forms (F04C 2/16 takes precedence)  [3]
 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  [3]
 F04C 2/24
·  of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions  [3]
 F04C 2/26
·  ·  of internal-axis type  [3]
 F04C 2/28
·  ·  of other than internal-axis type  [3]
 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  [3]
 F04C 2/32
·  ·  having both the movement defined in group F04C 2/02 and relative reciprocation between the co-operating members  [3]
 F04C 2/324
·  ·  ·  with vanes hinged to the inner member and reciprocating with respect to the outer member  [3]
 F04C 2/328
·  ·  ·  ·  and hinged to the outer member  [3]
 F04C 2/332
·  ·  ·  with vanes hinged to the outer member and reciprocating with respect to the inner member  [3]
 F04C 2/336
·  ·  ·  ·  and hinged to the inner member  [3]
 F04C 2/34
·  ·  having the movement defined in group F04C 2/08 or F04C 2/22 and relative reciprocation between the co-operating members  [3]
 F04C 2/344
·  ·  ·  with vanes reciprocating with respect to the inner member  [3]
 F04C 2/348
·  ·  ·  ·  the vanes positively engaging, with circumferential play, an outer rotatable member  [3]
 F04C 2/352
·  ·  ·  ·  the vanes being pivoted on the axis of the outer member  [3]
 F04C 2/356
·  ·  ·  with vanes reciprocating with respect to the outer member  [3]
 F04C 2/36
·  ·  having both the movements defined in groups F04C 2/22 and F04C 2/24  [3]
 F04C 2/38
·  ·  having the movement defined in group F04C 2/02 and having a hinged member (F04C 2/32 takes precedence)  [3]
 F04C 2/39
·  ·  ·  with vanes hinged to the inner as well as to the outer member  [3]
 F04C 2/40
·  ·  having the movement defined in group F04C 2/08 or F04C 2/22 and having a hinged member  [3]
 F04C 2/44
·  ·  ·  with vanes hinged to the inner member  [3]
 F04C 2/46
·  ·  ·  with vanes hinged to the outer member  [3]
 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)
 F04C 5/00
Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
 F04C 7/00
Rotary-piston machines or pumps with fluid ring or the like
 F04C 9/00
Oscillating-piston machines or pumps
 F04C 11/00
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)
 F04C 13/00
Adaptations of machines or pumps for special use, e.g. for extremely high pressures
 F04C 15/00
Component parts, details, or accessories, of machines, pumps, or pumping installations, not provided for in, or of interest apart from, other groups
 F04C 15/02
·  Control of working-fluid admission or discharge
 F04C 15/04
·  Other regulation or control
 F04C 18/00 - 
F04C 29/00
Rotary-piston, or oscillating-piston, positive-displacement pumps specially adapted for elastic fluids
 F04C 17/00
( transferred to F04C 18/00 )
 F04C 18/00
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]
 F04C 18/02 - 
F04C 18/28

Note(s)

Group F04C 18/30 takes precedence over groups F04C 18/02-F04C 18/28[3]

 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  [3]
 F04C 18/04
·  ·  of internal-axis type  [3]
 F04C 18/06
·  ·  of other than internal-axis type  [3]
 F04C 18/063
·  ·  ·  with coaxially-mounted members having continuously-changing circumferential spacing between them  [3]
 F04C 18/067
·  ·  ·  ·  having cam-and-follower type drive  [3]
 F04C 18/07
·  ·  ·  ·  having rankshaft-and-connecting-rod type drive  [3]
 F04C 18/073
·  ·  ·  ·  having pawl-and-ratchet type drive  [3]
 F04C 18/077
·  ·  ·  ·  having toothed-gearing type drive  [3]
 F04C 18/08
·  of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing  [3]
 F04C 18/10
·  ·  of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member  [3]
 F04C 18/107
·  ·  ·  with helical teeth  [3]
 F04C 18/113
·  ·  ·  the inner member carrying rollers intermeshing with the outer member  [3]
 F04C 18/12
·  ·  of other than internal-axis type  [3]
 F04C 18/14
·  ·  ·  with toothed rotary pistons  [3]
 F04C 18/16
·  ·  ·  ·  with helical teeth, e.g. chevron-shaped, screw type  [3]
 F04C 18/18
·  ·  ·  ·  with similar tooth forms (F04C 18/16 takes precedence)  [3]
 F04C 18/20
·  ·  ·  ·  with dissimilar tooth forms (F04C 18/16 takes precedence)  [3]
 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  [3]
 F04C 18/24
·  of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions  [3]
 F04C 18/26
·  ·  of internal-axis type  [3]
 F04C 18/28
·  ·  of other than internal-axis type  [3]
 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 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members  [3]
 F04C 18/32
·  ·  having both the movement defined in group F04C 18/02 and relative reciprocation between the co-operating members  [3]
 F04C 18/324
·  ·  ·  with vanes hinged to the inner member and reciprocating with respect to the outer member  [3]
 F04C 18/328
·  ·  ·  ·  and hinged to the outer member  [3]
 F04C 18/332
·  ·  ·  with vanes hinged to the outer member and reciprocating with respect to the inner member  [3]
 F04C 18/336
·  ·  ·  ·  and hinged to the inner member  [3]
 F04C 18/34
·  ·  having the movement defined in group F04C 18/08 or F04C 18/22 and relative reciprocation between the co-operating members  [3]
 F04C 18/344
·  ·  ·  with vanes reciprocating with respect to the inner member  [3]
 F04C 18/348
·  ·  ·  ·  the vanes positively engaging, with circumferential play, an outer rotatable member  [3]
 F04C 18/352
·  ·  ·  ·  the vanes being pivoted on the axis of the outer member  [3]
 F04C 18/356
·  ·  ·  with vanes reciprocating with respect to the outer member  [3]
 F04C 18/36
·  ·  having both the movements defined in groups F04C 18/22 and F04C 18/24  [3]
 F04C 18/38
·  ·  having the movement defined in group F04C 18/02 and having a hinged member (F04C 18/32 takes precedence)  [3]
 F04C 18/39
·  ·  ·  with vanes hinged to the inner as well as to the outer member  [3]
 F04C 18/40
·  ·  having the movement defined in group F04C 18/08 or F04C 18/22 and having a hinged member  [3]
 F04C 18/44
·  ·  ·  with vanes hinged to the inner member  [3]
 F04C 18/46
·  ·  ·  with vanes hinged to the outer member  [3]
 F04C 19/00
Rotary-piston pumps with fluid ring or the like
 F04C 21/00
Oscillating-piston pumps
 F04C 23/00
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)
 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)
 F04C 25/00
Adaptations of pumps for special use
 F04C 25/02
·  for producing high vacuum (sealing arrangements F04C 27/00; silencing F04C 29/06)
 F04C 27/00
Sealing arrangements in rotary-piston pumps (sealing in general F16J)
 F04C 27/02
·  Liquid sealing for high-vacuum pumps
 F04C 29/00
Component parts, details, or accessories, of pumps or pumping installations, not provided for in, or of interest apart from, groups F 04 C 17/00 to F04C 27/00
 F04C 29/02
·  Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D)
 F04C 29/04
·  Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L 59/00)
 F04C 29/06
·  Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N)
 F04C 29/08
·  Control of working-fluid admission or discharge
 F04C 29/10
·  Other regulation or control