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 41/00; electrodynamic pumps H02N 4/20)
 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, D 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 definitions of "machines", "pumps", "rotary-piston machines", "oscillating-piston machines", "co-operating members", and "internal axis".

 F04C 1/00 - 
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
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)
 F04C 1/02
·  of arcuate-engagement type, i.e. with circular translatory movement of co-operating members (coaxial type F04C 1/16)
 F04C 1/04
·  of intermeching-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
 F04C 1/06
·  ·  of internal-axis type with the outer member having more teeth or tooth-equivalents than the inner member, e.g. of Moineau type
 F04C 1/08
·  ·  of other than internal-axis type, with toothed rotors
 F04C 1/10
·  ·  ·  with helical teeth, e.g. chevron-shaped or screw type
 F04C 1/12
·  of internal-axis type with co-operating members moving in the same direction at the point of interengagement, the inner member having more teeth or tooth-equivalents than the outer member
 F04C 1/14
·  of counter-engagement type, i.e. the movement of co-operating members at the point of interengagement being in opposite directions
 F04C 1/16
·  Rotary-piston machines or pumps not restricted to only one of the sub-groups F04C 1/02, F04C 1/04, F04C 1/12, or F04C 1/14)
 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 17/00 - 
F04C 29/00
Rotary-piston, or oscillating-piston, positive-displacement pumps specially adapted for elastic fluids
 F04C 17/00
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)
 F04C 17/02
·  of arcuate-engagement type, i.e. with circular translatory movement of co-operating members (coaxial type F04C 17/18)
 F04C 17/04
·  of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
 F04C 17/06
·  ·  of internal-axis type with the outer member having more teeth, or tooth-equivalents than the inner member
 F04C 17/08
·  ·  of other than internal-axis type
 F04C 17/10
·  ·  ·  with toothed rotors
 F04C 17/12
·  ·  ·  ·  with helical teeth, e, g. chevron-shaped or screw type
 F04C 17/14
·  of internal-axis type with co-operating members moving in the same direction at the point of interengagement, the inner member having more teeth or tooth-equivalents than the outer member
 F04C 17/16
·  of counter-engagement type, i.e. the movement of co-operating members at the point of interengagement being in opposite directions
 F04C 17/18
·  Rotary-piston pumps not restricted to only one of the sub-groups F04C 17/02, F04C 17/04, F04C 17/14 or F04C 17/16)
 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 F04C 17/00-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