IPC Classification

Class code (prefix) Descriptions Number of results
F04F 1/00 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
F04F 1/02 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating
F04F 1/04 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating generated by vaporising and condensing
F04F 1/06 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
F04F 1/08 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped specially adapted for raising liquids from great depths, e.g. in wells
F04F 1/10 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped of multiple type, e.g. with two or more units in parallel
F04F 1/12 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped of multiple type, e.g. with two or more units in parallel in series
F04F 1/14 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped adapted to pump specific liquids, e.g. corrosive or hot liquids
F04F 1/16 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped characterised by the fluid medium being suddenly pressurised, e.g. by explosion
F04F 1/18 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium being mixed with, or generated from, the liquid to be pumped
F04F 1/20 Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium being mixed with, or generated from, the liquid to be pumped specially adapted for raising liquids from great depths, e.g. in wells
F04F 3/00 Pumps using negative pressure acting directly on the liquid to be pumped
F04F 5/00 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow
F04F 5/02 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
F04F 5/04 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids
F04F 5/06 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids of rotary type
F04F 5/08 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids the elastic fluid being entrained in a free-falling column of liquid
F04F 5/10 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
F04F 5/12 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids of multi-stage type
F04F 5/14 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
F04F 5/16 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
F04F 5/18 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for compressing
F04F 5/20 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
F04F 5/22 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type
F04F 5/24 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids
F04F 5/26 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids of multi-stage type
F04F 5/28 Restarting of inducing action
F04F 5/30 Restarting of inducing action with axially-slidable combining nozzle
F04F 5/32 Restarting of inducing action with hinged flap in combining nozzle
F04F 5/34 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid characterised by means for changing inducing-fluid source
F04F 5/36 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid characterised by using specific inducing fluid
F04F 5/38 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid characterised by using specific inducing fluid the inducing fluid being mercury vapour
F04F 5/40 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid characterised by using specific inducing fluid the inducing fluid being oil vapour
F04F 5/42 Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow characterised by the input flow of inducing fluid medium being radial or tangential to output flow
F04F 5/44 Component parts, details, or accessories not provided for in, or of interest apart from, groups
F04F 5/46 Arrangements of nozzles
F04F 5/48 Control
F04F 5/50 Control of compressing pumps
F04F 5/52 Control of evacuating pumps
F04F 5/54 Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
F04F 7/00 Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein
F04F 7/02 Hydraulic rams
F04F 9/00 Diffusion pumps
F04F 9/02 Diffusion pumps of multi-stage type
F04F 9/04 Diffusion pumps in combination with fore pumps, e.g. use of isolating valves
F04F 9/06 Arrangement of vapour traps
F04F 9/08 Control
F04F 10/00 Siphons
F04F 10/02 Gravity-actuated siphons
F04F 13/00 Pressure exchangers
F04F 99/00 Subject matter not provided for in other groups of this subclass