|  | 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 Fulltext... Hierarchy... Expanded...F02B; engine fuel-injection pumps Fulltext... Hierarchy... Expanded...F02M; electric discharge pumps Fulltext... Hierarchy... Expanded...H01J 41/00; pumping by electrodynamic action Fulltext... Hierarchy... Expanded...H02N 4/20)

|  | F04 |
Note(s) Combinations of positive-displacement and non-positive-displacement pumps are to be found in the following sub-classes: Fulltext... Hierarchy... Expanded...F04B as a general sub-class for pumps; Fulltext... Hierarchy... Expanded...F04C, D in respect of matter peculiar to these sub-classes.

|  | F04C |
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines Fulltext... Hierarchy... Expanded...F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

|  | F04C |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards the definitions of "machine", "pump", "rotary-piston machine", "oscillating-piston machine", "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 Fulltext... Hierarchy... Expanded...F04C 3/00; with the working-chamber walls at least partly resiliently deformable Fulltext... Hierarchy... Expanded...F04C 5/00; with fluid ring or the like Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04B)

|  | F04C 1/02 |
· | of arcuate-engagement type, i.e. with circular translatory movement of co-operating members (coaxial type Fulltext... Hierarchy... Expanded...F04C 1/16)

|  | F04C 1/04 |
· | of intermeshing-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 Fulltext... Hierarchy... Expanded...F04C 1/02, Fulltext... Hierarchy... Expanded...F04C 1/04, Fulltext... Hierarchy... Expanded...F04C 1/12, or Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...F04C 13/00 takes precedence; fluid gearing Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 19/00; rotary-piston pumps in which the working fluid is exclusively displaced by one or more reciprocating pistons Fulltext... Hierarchy... Expanded...F04B)

|  | F04C 17/02 |
· | of arcuate-engagement type, i.e. with circular translatory movement of co-operating members (coaxial type Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 17/02, Fulltext... Hierarchy... Expanded...F04C 17/04, Fulltext... Hierarchy... Expanded...F04C 17/14 or Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 27/00; silencing Fulltext... Hierarchy... Expanded...F04C 29/06)

|  | F04C 27/00 |
Sealing arrangements in rotary-piston pumps (sealing in general Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F04C 17/00-F04C 27/00

|  | F04C 29/02 |
· | Lubrication (of machines or engines in general Fulltext... Hierarchy... Expanded...F01M); Lubricant separation (separation in general Fulltext... Hierarchy... Expanded...B01D)

|  | F04C 29/04 |
· | Heating; Cooling (of machines or engines in general Fulltext... Hierarchy... Expanded...F01P); Heat insulation (heat insulation in general Fulltext... Hierarchy... Expanded...F16L 59/00)

|  | F04C 29/06 |
· | Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general Fulltext... Hierarchy... Expanded...F01N)

|  | F04C 29/08 |
· | Control of working-fluid admission or discharge

|  | F04C 29/10 |
· | Other regulation or control