|  | 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; ion pumps Fulltext... Hierarchy... Expanded...H01J 41/12; electrodynamic pumps Fulltext... Hierarchy... Expanded...H02K 44/02)

|  | 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, Fulltext... Hierarchy... Expanded...F04D 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 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 Fulltext... Hierarchy... Expanded...F04C 2/00 )

|  | F04C 2/00 |
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) [3]

|  | F04C 2/02 - F04C 2/28 |
Note(s) Group Fulltext... Hierarchy... Expanded...F04C 2/30 takes precedence over groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...F04C 2/16 takes precedence) [3]

|  | F04C 2/20 |
· · · · | with dissimilar tooth forms (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 2/02, Fulltext... Hierarchy... Expanded...F04C 2/08, Fulltext... Hierarchy... Expanded...F04C 2/22, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 2/08 or Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 2/22 and Fulltext... Hierarchy... Expanded...F04C 2/24 [3]

|  | F04C 2/38 |
· · | having the movement defined in group Fulltext... Hierarchy... Expanded...F04C 2/02 and having a hinged member (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 2/08 or Fulltext... Hierarchy... Expanded...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 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 18/00 - F04C 29/00 |
Rotary-piston, or oscillating-piston, positive-displacement pumps specially adapted for elastic fluids

|  | F04C 17/00 |
( transferred to Fulltext... Hierarchy... Expanded...F04C 18/00 )

|  | F04C 18/00 |
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) [3]

|  | F04C 18/02 - F04C 18/28 |
Note(s) Group Fulltext... Hierarchy... Expanded...F04C 18/30 takes precedence over groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...F04C 18/16 takes precedence) [3]

|  | F04C 18/20 |
· · · · | with dissimilar tooth forms (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 18/02, Fulltext... Hierarchy... Expanded...F04C 18/08, Fulltext... Hierarchy... Expanded...F04C 18/22, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 18/08 or Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 18/22 and Fulltext... Hierarchy... Expanded...F04C 18/24 [3]

|  | F04C 18/38 |
· · | having the movement defined in group Fulltext... Hierarchy... Expanded...F04C 18/02 and having a hinged member (Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...F04C 18/08 or Fulltext... Hierarchy... Expanded...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 (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 F 04 C 17/00 to Fulltext... Hierarchy... Expanded...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