WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

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

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; rotary-piston machines or pumps in which the working-fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F04B)

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

F04C 2/025 ・・{the moving and the stationary member having co-operating elements in spiral form}

F04C 2/04 ・・of internal axis type

F04C 2/045 ・・・{having a C-shaped piston}

F04C 2/06 ・・of other than internal-axis type

F04C 2/063 ・・・with coaxially-mounted members having continuously-changing circumferential spacing between them

F04C 2/067 ・・・・having cam-and-follower type drive

F04C 2/07 ・・・・having crankshaft-and-connecting-rod type drive

F04C 2/073 ・・・・having pawl-and-ratchet type drive

F04C 2/077 ・・・・having toothed-gearing type drive

F04C 2/08 ・of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

F04C 2/082 ・・{Details specially related to intermeshing engagement type machines or pumps}

F04C 2/084 ・・・{Toothed wheels}

F04C 2/086 ・・・{Carter}

F04C 2/088 ・・・{Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement}

F04C 2/10 ・・of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member

F04C 2/101 ・・・{with a crescent-shaped filler element, located between the inner and outer intermeshing members}

F04C 2/102 ・・・{the two members rotating simultaneously around their respective axes}

F04C 2/103 ・・・{one member having simultaneously a rotational movement about its own axis and an orbital movement}

F04C 2/104 ・・・・{having an articulated driving shaft}

F04C 2/105 ・・・・{Details concerning timing or distribution valves}

F04C 2/106 ・・・・・{Spool type distribution valves}

F04C 2/107 ・・・with helical teeth

F04C 2/1071 ・・・・{the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type}

F04C 2/1073 ・・・・・{where one member is stationary while the other member rotates and orbits}

F04C 2/1075 ・・・・・・{Construction of the stationary member}

F04C 2/1076 ・・・・・{where one member orbits or wobbles relative to the other member which rotates around a fixed axis}

F04C 2/1078 ・・・・・{where one member rotates and both members are allowed to orbit or wobble}

F04C 2/113 ・・・the inner member carrying rollers intermeshing with the outer member

F04C 2/12 ・・of other than internal-axis type

F04C 2/123 ・・・{with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth}

F04C 2/126 ・・・{with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type}

F04C 2/14 ・・・with toothed rotary pistons

F04C 2/16 ・・・・with helical teeth, e.g. chevron-shaped, screw type {(for non-parallel axes of movement F04C 3/00)}

F04C 2/165 ・・・・・{having more than two rotary pistons with parallel axes}

F04C 2/18 ・・・・with similar tooth forms (F04C 2/16 takes precedence)

F04C 2/20 ・・・・with dissimilar tooth forms (F04C 2/16 takes precedence)

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

F04C 2/24 ・of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions

F04C 2/26 ・・of internal-axis type

F04C 2/28 ・・of other than internal-axis type

F04C 2/30 ・having the characteristics covered by two or more 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

F04C 2/32 ・・having both the movement defined in groups F04C 2/02 and relative reciprocation between co-operating members

F04C 2/321 ・・・{with vanes hinged to the inner member and reciprocating with respect to the inner member}

F04C 2/322 ・・・{with vanes hinged to the outer member and reciprocating with respect to the outer member}

F04C 2/324 ・・・with vanes hinged to the inner member and reciprocating with respect to the outer member

F04C 2/328 ・・・・and hinged to the outer member

F04C 2/332 ・・・with vanes hinged to the outer member and reciprocating with respect to the inner member

F04C 2/336 ・・・・and hinged to the inner member

F04C 2/34 ・・having the movement defined in groups F04C 2/08 or F04C 2/22 and relative reciprocation between the co-operating members

F04C 2/344 ・・・with vanes reciprocating with respect to the inner member

F04C 2/3441 ・・・・{the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation}

F04C 2/3442 ・・・・・{the surfaces of the inner and outer member, forming the working space, being surfaces of revolution}

F04C 2/3443 ・・・・・{with a separation element located between the inlet and outlet opening}

F04C 2/3445 ・・・・・{the vanes having the form of rollers, slippers or the like}

F04C 2/3446 ・・・・{the inner and outer member being in contact along more than one line or surface}

F04C 2/3447 ・・・・・{the vanes having the form of rollers, slippers or the like}

F04C 2/3448 ・・・・{with axially movable vanes}

F04C 2/348 ・・・・the vanes positively engaging, with circumferential play, an outer rotatable member

F04C 2/352 ・・・・the vanes being pivoted on the axis of the outer member

F04C 2/356 ・・・with vanes reciprocating with respect to the outer member

F04C 2/3562 ・・・・{the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation}

F04C 2/3564 ・・・・・{the surfaces of the inner and outer member, forming the working space, being surfaces of revolution}

F04C 2/3566 ・・・・{the inner and outer member being in contact along more than one line or surface}

F04C 2/3568 ・・・・{with axially movable vanes}

F04C 2/36 ・・having both the movements defined in groups F04C 2/22 and F04C 2/24

F04C 2/38 ・・having the movement defined in group F04C 2/02 and having a hinged member (F04C 2/32 takes precedence)

F04C 2/39 ・・・with vanes hinged to the inner as well as to the outer member

F04C 2/40 ・・having the movement defined in group F04C 2/08 or F04C 2/22 and having a hinged member

F04C 2/44 ・・・with vanes hinged to the inner member

F04C 2/46 ・・・with vanes hinged to the outer member

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)

F04C 3/02 ・the axes being arranged at an angle of 90 degrees

F04C 3/04 ・・of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

F04C 3/06 ・the axes being arranged otherwise than at an angle of 90 degrees

F04C 3/08 ・・of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

F04C 3/085 ・・・{the axes of cooperating members being on the same plane}

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)

F04C 7/00 Rotary-piston machines or pumps with fluid ring or the like (such pumps specially adapted for elastic fluids F04C 19/00)

F04C 9/00 Oscillating-piston machines or pumps (such pumps specially adapted for elastic fluids F04C 21/00)

F04C 9/002 ・{the piston oscillating around a fixed axis}

F04C 9/005 ・{the piston oscillating in the space, e.g. around a fixed point (rotary-piston machines or pumps with non-parallel axes of movement between co-operating members F04C 3/00)}

F04C 9/007 ・{the points of the moving element describing approximately an alternating movement in axial direction with respect to the other element}

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)

F04C 11/001 ・{of similar working principle}

F04C 11/003 ・・{having complementary function}

F04C 11/005 ・{of dissimilar working principle}

F04C 11/006 ・・{having complementary function}

F04C 11/008 ・{Enclosed motor pump units}

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)

F04C 13/001 ・{Pumps for particular liquids}

F04C 13/002 ・・{for homogeneous viscous liquids}

F04C 13/004 ・・・{with means for fluidising or diluting the material being pumped}

F04C 13/005 ・{Removing contaminants, deposits or scale from the pump; Cleaning}

F04C 13/007 ・{Venting; Gas and vapour separation during pumping (preventing vapour lock in fuel pumps F02M 37/20, in centrifugal pumps F04D 9/00)}

F04C 13/008 ・{Pumps for submersible use, i.e. down-hole pumping}

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)

F04C 14/02 ・specially adapted for several machines or pumps connected in series or in parallel

F04C 14/04 ・specially adapted for reversible machines or pumps

F04C 14/06 ・specially adapted for stopping, starting, idling or no-load operation

F04C 14/065 ・・{Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable}

F04C 14/08 ・characterised by varying the rotational speed

F04C 14/10 ・characterised by changing the positions of the inlet or outlet openings with respect to the working chamber

F04C 14/12 ・・using sliding valves

F04C 14/14 ・・using rotating valves

F04C 14/16 ・・using lift valves

F04C 14/18 ・characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C 14/10)

F04C 14/185 ・・{by varying the useful pumping length of the cooperating members in the axial direction}

F04C 14/20 ・・by changing the form of the inner or outer contour of the working chamber

F04C 14/22 ・・by changing the eccentricity between cooperating members

F04C 14/223 ・・・{using a movable cam}

F04C 14/226 ・・・・{by pivoting the cam around an eccentric axis}

F04C 14/24 ・characterised by using valves regulating pressure or flow rate, e.g. discharge valves, {unloading valves}(F04C 14/10 takes precedence)

F04C 14/26 ・・using bypass channels

F04C 14/265 ・・・{being obtained by displacing a lateral sealing face}

F04C 14/28 ・Safety arrangements; Monitoring

F04C 15/00 Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C 2/00 to F04C 14/00(of pumps specially adapted for elastic fluids F04C 18/00 to F04C 29/00)

F04C 15/0003 ・{Sealing arrangements in rotary-piston machines or pumps (sealing in general F16J)}

F04C 15/0007 ・・{Radial sealings for working fluid}

F04C 15/0011 ・・・{of rigid material}

F04C 15/0015 ・・・{of resilient material}

F04C 15/0019 ・・・{Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps, e.g. gear machines or pumps}

F04C 15/0023 ・・{Axial sealings for working fluid}

F04C 15/0026 ・・・{Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps}

F04C 15/003 ・・{Sealings for working fluid between radially and axially moving parts}

F04C 15/0034 ・・{for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine}

F04C 15/0038 ・・・{Shaft sealings specially adapted for rotary-piston machines or pumps}

F04C 15/0042 ・{Systems for the equilibration of forces acting on the machines or pump (interstice adjustment other than by fluid pressure F01C 21/102)}

F04C 15/0046 ・・{Internal leakage control}

F04C 15/0049 ・・{Equalization of pressure pulses (silencing for compressors F04C 29/06)}

F04C 15/0053 ・{Venting means for starting}

F04C 15/0057 ・{Driving elements, brakes, couplings, transmission specially adapted for machines or pumps (brakes, couplings, transmissions per se F16, B60)}

F04C 15/0061 ・・{Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions}

F04C 15/0065 ・・・{for eccentric movement}

F04C 15/0069 ・・・{Magnetic couplings}

F04C 15/0073 ・・・{Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft}

F04C 15/0076 ・・{Fixing rotors on shafts, e.g. by clamping together hub and shaft}

F04C 15/008 ・・{Prime movers}

F04C 15/0084 ・・{Brakes, braking assemblies}

F04C 15/0088 ・{Lubrication (of machines or engines in general F01M)}

F04C 15/0092 ・・{Control systems for the circulation of the lubricant}

F04C 15/0096 ・{Heating; Cooling (of machines or engines in general F01P)}

F04C 15/06 ・Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

F04C 15/062 ・・{Arrangements for supercharging the working space (similar arrangements for internal combustion engines F02B 33/00, F02B 37/00)}

F04C 15/064 ・・{with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps}

F04C 15/066 ・・・{of the non-return type}

F04C 15/068 ・・・・{of the elastic type, e.g. reed valves}

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)

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

F04C 18/0207 ・・{both members having co-operating elements in spiral form}

F04C 18/0215 ・・・{where only one member is moving}

F04C 18/0223 ・・・・{with symmetrical double wraps}

F04C 18/023 ・・・{where both members are moving}

F04C 18/0238 ・・・・{with symmetrical double wraps}

F04C 18/0246 ・・・{Details concerning the involute wraps or their base, e.g. geometry}

F04C 18/0253 ・・・・{Details concerning the base}

F04C 18/0261 ・・・・・{Details of the ports, e.g. location, number, geometry}

F04C 18/0269 ・・・・{Details concerning the involute wraps}

F04C 18/0276 ・・・・・{Different wall heights}

F04C 18/0284 ・・・・・{Details of the wrap tips}

F04C 18/0292 ・・・・・{Ports or channels located in the wrap}

F04C 18/04 ・・of internal-axis type

F04C 18/045 ・・・{having a C-shaped piston}

F04C 18/06 ・・of other than internal-axis type

F04C 18/063 ・・・with coaxially-mounted members having continuously-changing circumferential spacing between them

F04C 18/067 ・・・・having cam-and-follower type drive

F04C 18/07 ・・・・having crankshaft-and-connecting-rod type drive

F04C 18/073 ・・・・having pawl-and-ratchet type drive

F04C 18/077 ・・・・having toothed-gearing type drive

F04C 18/08 ・of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

F04C 18/082 ・・{Details specially related to intermeshing engagement type pumps}

F04C 18/084 ・・・{Toothed wheels}

F04C 18/086 ・・・{Carter}

F04C 18/088 ・・・{Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement}

F04C 18/10 ・・of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member

F04C 18/103 ・・・{with a crescent shaped filler element, located between the inner and outer intermeshing elements}

F04C 18/107 ・・・with helical teeth

F04C 18/1075 ・・・・{the inner and outer member having a different number of threads and one of the two being made of elastic material, e.g. Moineau type}

F04C 18/113 ・・・the inner member carrying rollers intermeshing with the outer member

F04C 18/12 ・・of other than internal-axis type

F04C 18/123 ・・・{with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth}

F04C 18/126 ・・・{with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type}

F04C 18/14 ・・・with toothed rotary pistons

F04C 18/16 ・・・・with helical teeth, e.g. chevron-shaped, screw type {(for non-parallel axes of movement F04C 18/48)}

F04C 18/165 ・・・・・{having more than two rotary pistons with parallel axes}

F04C 18/18 ・・・・with similar tooth forms (F04C 18/16 takes precedence)

F04C 18/20 ・・・・with dissimilar tooth forms (F04C 18/16 takes precedence)

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

F04C 18/24 ・of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions

F04C 18/26 ・・of internal-axis type

F04C 18/28 ・・of other than internal-axis type

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

F04C 18/32 ・・having both the movement defined in group F04C 18/02 and relative reciprocation between the co-operating members

F04C 18/321 ・・・{with vanes hinged to the inner member and reciprocating with respect to the inner member}

F04C 18/322 ・・・{with vanes hinged to the outer member and reciprocating with respect to the outer member}

F04C 18/324 ・・・with vanes hinged to the inner member and reciprocating with respect to the outer member

F04C 18/328 ・・・・and hinged to the outer member

F04C 18/332 ・・・with vanes hinged to the outer member and reciprocating with respect to the inner member

F04C 18/336 ・・・・and hinged to the inner member

F04C 18/34 ・・having the movement defined in group F04C 18/08 or F04C 18/22 and relative reciprocation between the co-operating members

F04C 18/344 ・・・with vanes reciprocating with respect to the inner member

F04C 18/3441 ・・・・{the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation}

F04C 18/3442 ・・・・・{the surfaces of the inner and outer member, forming the inlet and outlet opening}

F04C 18/3443 ・・・・・{with a separation element located between the inlet and outlet opening}

F04C 18/3445 ・・・・・{the vanes having the form of rollers, slippers or the like}

F04C 18/3446 ・・・・{the inner and outer member being in contact along more than one line or surface}

F04C 18/3447 ・・・・・{the vanes having the form of rollers, slippers or the like}

F04C 18/3448 ・・・・{with axially movable vanes}

F04C 18/348 ・・・・the vanes positively engaging, with circumferential play, an outer rotatable member

F04C 18/352 ・・・・the vanes being pivoted on the axis of the outer member

F04C 18/356 ・・・with vanes reciprocating with respect to the outer member

F04C 18/3562 ・・・・{the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation}

F04C 18/3564 ・・・・・{the surfaces of the inner and outer member, forming the working space, being surfaces of revolution}

F04C 18/3566 ・・・・{the inner and outer member being in contact along more than line or surface}

F04C 18/3568 ・・・・{with axially movable vanes}

F04C 18/36 ・・having both the movement defined in groups F04C 18/22 and F04C 18/24

F04C 18/38 ・・having the movement defined in group F04C 18/02 and having a hinged member (F04C 18/32 takes precedence)

F04C 18/39 ・・・with vanes hinged to the inner as well as to the outer member

F04C 18/40 ・・having the movement defined in group F04C 18/08 or F04C 18/22 and having a hinged member

F04C 18/44 ・・・with vanes hinged to the inner member

F04C 18/46 ・・・with vanes hinged to the outer member

F04C 18/48 ・Rotary-piston pumps with non-parallel axes of movement of co-operating members

F04C 18/50 ・・the axes being arranged at an angle of 90 degrees

F04C 18/52 ・・・of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

F04C 18/54 ・・the axes being arranged otherwise than at an angle of 90 degrees

F04C 18/56 ・・・of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

F04C 18/565 ・・・・{the axes of cooperating members being on the same plane}

F04C 19/00 Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids

F04C 19/001 ・{General arrangements, plants, flowsheets}

F04C 19/002 ・{with rotating outer members}

F04C 19/004 ・{Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply}

F04C 19/005 ・{Details concerning the admission or discharge}

F04C 19/007 ・・{Port members in the form of side plates}

F04C 19/008 ・・{Port members in the form of conical or cylindrical pieces situated in the centre of the impeller}

F04C 21/00 Oscillating-piston pumps specially adapted for elastic fluids

F04C 21/002 ・{the piston oscillating around a fixed axis}

F04C 21/005 ・{the piston oscillating in the space, e.g. around a fixed point (rotary-piston pumps with non-parallel axes of rotation between co-operating members F04C 18/48)}

F04C 21/007 ・{the points of the moving element describing approximately an alternating movement in axial direction with respect to the other element}

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)

F04C 23/001 ・{of similar working principle}

F04C 23/003 ・・{having complementary function}

F04C 23/005 ・{of dissimilar working principle}

F04C 23/006 ・・{having complementary function}

F04C 23/008 ・{Hermetic pumps}

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 of pumps for elastic fluids

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 specially adapted for elastic fluids

F04C 27/001 ・{Radial sealings for working fluid}

F04C 27/002 ・・{of rigid material}

F04C 27/003 ・・{of resilient material}

F04C 27/004 ・・{Radial sealing elements specially adapted for intermeshing-engagement type pumps, e.g. gear pumps}

F04C 27/005 ・{Axial sealings for working fluid}

F04C 27/006 ・・{Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type pumps, e.g. gear pumps}

F04C 27/007 ・{Sealings for working fluid between radially and axially moving parts}

F04C 27/008 ・{for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine}

F04C 27/009 ・・{Shaft sealings specially adapted for pumps}

F04C 27/02 ・Liquid sealing for high-vacuum pumps {or for compressors}

F04C 28/00 Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids

F04C 28/02 ・specially adapted for several pumps connected in series or in parallel

F04C 28/04 ・specially adapted for reversible pumps

F04C 28/06 ・specially adapted for stopping, starting, idling or no-load operation

F04C 28/065 ・・{Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable}

F04C 28/08 ・characterised by varying the rotational speed

F04C 28/10 ・characterised by changing the positions of the inlet or outlet openings with respect to the working chamber

F04C 28/12 ・・using sliding valves

F04C 28/125 ・・・{with sliding valves controlled by the use of fluid other than the working fluid}

F04C 28/14 ・・using rotating valves

F04C 28/16 ・・using lift valves

F04C 28/18 ・characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C 28/10)

F04C 28/185 ・・{by varying the useful pumping length of the cooperating members in the axial direction}

F04C 28/20 ・・by changing the form of the inner or outer contour of the working chamber

F04C 28/22 ・・by changing the eccentricity between cooperating members

F04C 28/24 ・characterised by using valves regulating pressure or flow rate, e.g. discharge valves {unloading valves}(F04C 28/10 takes precedence)

F04C 28/26 ・・using bypass channels

F04C 28/265 ・・・{being obtained by displacing a lateral sealing face}

F04C 28/28 ・Safety arrangements; Monitoring

F04C 29/00 Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C 18/00 to F04C 28/00

F04C 29/0007 ・{Injection of a fluid in the working chamber for sealing, cooling and lubricating (sealing only F04C 27/00; lubrication only F04C 29/02; cooling F02B 47/02, F02D 21/00, F02M 25/00)}

F04C 29/0014 ・・{with control systems for the injection of the fluid}

F04C 29/0021 ・{Systems for the equilibration of forces acting on the pump}(interstice adjustment other than by fluid pressure F01C 21/102)

F04C 29/0028 ・・{Internal leakage control}

F04C 29/0035 ・・{Equalization of pressure pulses (silencing F04C 29/06)}

F04C 29/0042 ・{Driving elements, brakes, couplings, transmissions specially adapted for pumps (brakes, couplings, transmissions per se F16, B60)}

F04C 29/005 ・・{Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions}

F04C 29/0057 ・・・{for eccentric movement}

F04C 29/0064 ・・・{Magnetic couplings}

F04C 29/0071 ・・・{Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft}

F04C 29/0078 ・・{Fixing rotors on shafts, e.g. by clamping together hub and shaft}

F04C 29/0085 ・・{Prime movers}

F04C 29/0092 ・{Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning}

F04C 29/02 ・Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D)

F04C 29/021 ・・{Control systems for the circulation of the lubricant}

F04C 29/023 ・・{Lubricant distribution through a hollow driving shaft (F04C 29/025 takes precedence)}

F04C 29/025 ・・{using a lubricant pump}

F04C 29/026 ・・{Lubricant separation}

F04C 29/028 ・・{Means for improving or restricting lubricant flow}

F04C 29/04 ・Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L 59/00)

F04C 29/042 ・・{by injecting a fluid (injection of fluid for sealing, cooling or lubrication F04C 29/0007)}

F04C 29/045 ・・{of the electric motor in hermetic pumps}

F04C 29/047 ・・{Cooling of electronic devices installed inside the pump housing, e.g. inverters}

F04C 29/06 ・Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N)

F04C 29/061 ・・{Silencers using overlapping frequencies, e.g. Helmholtz resonators}

F04C 29/063 ・・{Sound absorbing materials}

F04C 29/065 ・・{Noise dampening volumes, e.g. muffler chambers}

F04C 29/066 ・・・{with means to enclose the source of noise}

F04C 29/068 ・・{the silencing means being arranged inside the pump housing}

F04C 29/12 ・Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

F04C 29/122 ・・{Arrangements for supercharging the working space (similar arrangements for internal combustion engines F02B 33/00, F02B 37/00)}

F04C 29/124 ・・{with inlet and outlet valves specially adapted for rotary or oscillating piston pumps}

F04C 29/126 ・・・{of the non-return type}

F04C 29/128 ・・・・{of the elastic type, e.g. reed valves}

F04C 2210/00 Fluid

F04C 2210/10 ・working

F04C 2210/1005 ・・Air

F04C 2210/1011 ・・Amine

F04C 2210/1016 ・・Blood

F04C 2210/1022 ・・C3HmFn

F04C 2210/1027 ・・CO2

F04C 2210/1033 ・・Concrete

F04C 2210/1038 ・・Cooking oil

F04C 2210/1044 ・・Fuel

F04C 2210/105 ・・Helium (He)

F04C 2210/1055 ・・Hydrogen (H2)

F04C 2210/1061 ・・LPG

F04C 2210/1066 ・・Nitrogen (N2)

F04C 2210/1072 ・・Oxygen (O2)

F04C 2210/1077 ・・Steam

F04C 2210/1083 ・・Urea

F04C 2210/1088 ・・Vegetable oil

F04C 2210/1094 ・・Water

F04C 2210/12 ・auxiliary

F04C 2210/122 ・・Nitrogen (N2)

F04C 2210/124 ・・Sodium (Na)

F04C 2210/126 ・・Tin

F04C 2210/128 ・・Water

F04C 2210/14 ・Lubricant

F04C 2210/142 ・・Ester

F04C 2210/145 ・・PAG

F04C 2210/147 ・・Water

F04C 2210/20 ・liquid, i.e. incompressible

F04C 2210/201 ・・DME

F04C 2210/203 ・・Fuel

F04C 2210/205 ・・Ink

F04C 2210/206 ・・Oil

F04C 2210/208 ・・Water

F04C 2210/22 ・gaseous, i.e. compressible

F04C 2210/221 ・・Air

F04C 2210/222 ・・Carbon dioxide (CO2)

F04C 2210/224 ・・Hydrogen (H2)

F04C 2210/225 ・・Nitrogen (N2)

F04C 2210/227 ・・Steam

F04C 2210/228 ・・Vapour

F04C 2210/24 ・mixed, e.g. two-phase fluid

F04C 2210/242 ・・Steam

F04C 2210/245 ・・Vapour

F04C 2210/247 ・・Water

F04C 2210/26 ・Refrigerants with particular properties, e.g. HFC-134a

F04C 2210/261 ・・Carbon dioxide (CO2)

F04C 2210/263 ・・HFO1234YF

F04C 2210/265 ・・Ammoniac (NH3)

F04C 2210/266 ・・Propane

F04C 2210/268 ・・R32

F04C 2210/40 ・Properties

F04C 2210/42 ・・magnetic or ferromagnetic; Ferrofluids

F04C 2210/44 ・・Viscosity

F04C 2210/60 ・Condition

F04C 2210/62 ・・Purity

F04C 2220/00 Application

F04C 2220/10 ・Vacuum

F04C 2220/12 ・・Dry running

F04C 2220/20 ・Pumps with means for separating and evacuating the gaseous phase

F04C 2220/22 ・for very low temperatures, i.e. cryogenic

F04C 2220/24 ・for metering throughflow

F04C 2220/26 ・for step-by-step output movement

F04C 2220/28 ・for pulsed fluid flow

F04C 2220/30 ・Use in a chemical vapor deposition (CVD) process or in a similar process

F04C 2220/40 ・Pumps with means for venting areas other than the working chamber, e.g. bearings, gear chambers, shaft seals

F04C 2220/50 ・Pumps with means for introducing gas under pressure for ballasting

F04C 2230/00 Manufacture

F04C 2230/10 ・by removing material

F04C 2230/101 ・・by electrochemical methods

F04C 2230/102 ・・by spark erosion methods

F04C 2230/103 ・・using lasers

F04C 2230/20 ・essentially without removing material

F04C 2230/21 ・・by casting

F04C 2230/22 ・・by sintering

F04C 2230/23 ・・by permanently joining parts together

F04C 2230/231 ・・・by welding

F04C 2230/24 ・・by extrusion

F04C 2230/25 ・・by forging

F04C 2230/26 ・・by rolling

F04C 2230/27 ・・by hydroforming

F04C 2230/40 ・Heat treatment

F04C 2230/41 ・・Hardening; Annealing

F04C 2230/60 ・Assembly methods

F04C 2230/601 ・・Adjustment

F04C 2230/602 ・・Gap; Clearance

F04C 2230/603 ・・Centering; Aligning

F04C 2230/604 ・・Mounting devices for pumps or compressors

F04C 2230/605 ・・Balancing

F04C 2230/70 ・Disassembly methods

F04C 2230/80 ・Repairing methods

F04C 2230/85 ・Methods for improvement by repair or exchange of parts

F04C 2230/90 ・Improving properties of machine parts

F04C 2230/91 ・・Coating

F04C 2230/92 ・・Surface treatment

F04C 2240/00 Components

F04C 2240/10 ・Stators

F04C 2240/102 ・・with means for discharging condensate or liquid separated from the gas pumped

F04C 2240/20 ・Rotors

F04C 2240/30 ・Casings or housings

F04C 2240/40 ・Electric motor

F04C 2240/401 ・・Linear motor

F04C 2240/402 ・・Plurality of electronically synchronised motors

F04C 2240/403 ・・with inverter for speed control

F04C 2240/45 ・Hybrid prime mover

F04C 2240/50 ・Bearings

F04C 2240/51 ・・for cantilever assemblies

F04C 2240/52 ・・for assemblies with supports on both sides

F04C 2240/54 ・・Hydrostatic or hydrodynamic bearing assemblies specially adapted for rotary positive displacement pumps or compressors

F04C 2240/56 ・・Bearing bushings or details thereof

F04C 2240/60 ・Shafts

F04C 2240/601 ・・Shaft flexion

F04C 2240/603 ・・with internal channels for fluid distribution, e.g. hollow shaft

F04C 2240/605 ・・Shaft sleeves or details thereof

F04C 2240/70 ・Use of multiplicity of similar components; Modular construction

F04C 2240/80 ・Other components

F04C 2240/801 ・・Wear plates

F04C 2240/802 ・・Liners

F04C 2240/803 ・・Electric connectors or cables; Fittings therefor

F04C 2240/804 ・・Accumulators for refrigerant circuits

F04C 2240/805 ・・Fastening means, e.g. bolts

F04C 2240/806 ・・Pipes for fluids; Fittings therefor

F04C 2240/807 ・・Balance weight, counterweight

F04C 2240/808 ・・Electronic circuits (e.g. inverters) installed inside the machine

F04C 2240/809 ・・Lubricant sump

F04C 2240/81 ・・Sensor, e.g. electronic sensor for control or monitoring

F04C 2240/811 ・・Actuator for control, e.g. pneumatic, hydraulic, electric

F04C 2250/00 Geometry

F04C 2250/10 ・of the inlet or outlet

F04C 2250/101 ・・of the inlet

F04C 2250/102 ・・of the outlet

F04C 2250/20 ・of the rotor

F04C 2250/201 ・・conical shape

F04C 2250/30 ・of the stator

F04C 2250/301 ・・compression chamber profile defined by a mathematical expression or by parameters

F04C 2270/00 Control; Monitoring or safety arrangements

F04C 2270/01 ・Load

F04C 2270/015 ・・Controlled or regulated

F04C 2270/02 ・Power

F04C 2270/025 ・・Controlled or regulated

F04C 2270/03 ・Torque

F04C 2270/035 ・・Controlled or regulated

F04C 2270/04 ・Force

F04C 2270/041 ・・Controlled or regulated

F04C 2270/042 ・・radial

F04C 2270/0421 ・・・Controlled or regulated

F04C 2270/0422 ・・・centrifugal

F04C 2270/04225 ・・・・Controlled or regulated

F04C 2270/044 ・・axial

F04C 2270/0445 ・・・Controlled or regulated

F04C 2270/05 ・Speed

F04C 2270/051 ・・Controlled or regulated

F04C 2270/052 ・・angular

F04C 2270/0525 ・・・Controlled or regulated

F04C 2270/054 ・・linear

F04C 2270/0545 ・・・Controlled or regulated

F04C 2270/06 ・Acceleration

F04C 2270/065 ・・Controlled or regulated

F04C 2270/07 ・Electric current

F04C 2270/075 ・・Controlled or regulated

F04C 2270/08 ・Amplitude of electric current

F04C 2270/085 ・・Controlled or regulated

F04C 2270/09 ・Electric current frequency

F04C 2270/095 ・・Controlled or regulated

F04C 2270/10 ・Voltage

F04C 2270/105 ・・Controlled or regulated

F04C 2270/11 ・Magnetic flux

F04C 2270/115 ・・Controlled or regulated

F04C 2270/12 ・Vibration

F04C 2270/125 ・・Controlled or regulated

F04C 2270/13 ・Noise

F04C 2270/135 ・・Controlled or regulated

F04C 2270/14 ・Pulsations

F04C 2270/145 ・・Controlled or regulated

F04C 2270/15 ・Resonance

F04C 2270/155 ・・Controlled or regulated

F04C 2270/16 ・Wear

F04C 2270/165 ・・Controlled or regulated

F04C 2270/17 ・Tolerance; Play; Gap

F04C 2270/175 ・・Controlled or regulated

F04C 2270/18 ・Pressure

F04C 2270/185 ・・Controlled or regulated

F04C 2270/19 ・Temperature

F04C 2270/195 ・・Controlled or regulated

F04C 2270/20 ・Flow

F04C 2270/205 ・・Controlled or regulated

F04C 2270/21 ・Pressure difference

F04C 2270/215 ・・Controlled or regulated

F04C 2270/22 ・Temperature difference

F04C 2270/225 ・・Controlled or regulated

F04C 2270/23 ・Working cycle timing control

F04C 2270/24 ・Level of liquid, e.g. lubricant or cooling liquid

F04C 2270/40 ・Conditions across a pump or machine

F04C 2270/42 ・Conditions at the inlet of a pump or machine

F04C 2270/44 ・Conditions at the outlet of a pump or machine

F04C 2270/46 ・Conditions in the working chamber

F04C 2270/48 ・Conditions of a reservoir linked to a pump or machine

F04C 2270/50 ・Conditions before a throttle

F04C 2270/52 ・Conditions after a throttle

F04C 2270/54 ・Conditions in a control cylinder/piston unit

F04C 2270/56 ・Number of pump/machine units in operation

F04C 2270/58 ・Valve parameters

F04C 2270/585 ・・Controlled or regulated

F04C 2270/60 ・Prime mover parameters

F04C 2270/605 ・・Controlled or regulated

F04C 2270/70 ・Safety, emergency conditions or requirements

F04C 2270/701 ・・Cold start

F04C 2270/72 ・・preventing reverse rotation

F04C 2270/78 ・Warnings

F04C 2270/782 ・・Sound

F04C 2270/784 ・・Light

F04C 2270/80 ・Diagnostics

F04C 2270/86 ・Detection

F04C 2270/90 ・Remote control, e.g. wireless, via LAN, by radio, or by a wired connection from a central computer

F04C 2280/00 Arrangements for preventing or removing deposits or corrosion

F04C 2280/02 ・Preventing solid deposits in pumps, e.g. in vacuum pumps with chemical vapour deposition (CVD) processes

F04C 2280/04 ・Preventing corrosion