F04F1/00	7	Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped (using only negative pressure F04F3/00; jet pumps F04F5/00; siphons F04F10/00)	F04F1/00	F04F1/00		328
F04F1/02	8	using both positively and negatively pressurised fluid medium, e.g. alternating	F04F1/02	F04F1/02		314
F04F1/04	9	generated by vaporising and condensing	F04F1/04	F04F1/04		132
F04F1/06	8	the fluid medium acting on the surface of the liquid to be pumped (F04F1/02 takes precedence)	F04F1/06	F04F1/06		1510
F04F1/08	9	specially adapted for raising liquids from great depths, e.g. in wells	F04F1/08	F04F1/08		159
F04F1/10	9	of multiple type, e.g. with two or more units in parallel (F04F1/08 takes precedence)	F04F1/10	F04F1/10		231
F04F1/12	10	in series	F04F1/12	F04F1/12		161
F04F1/14	9	adapted to pump specific liquids, e.g. corrosive or hot liquids	F04F1/14	F04F1/14		130
F04F1/16	9	characterised by the fluid medium being suddenly pressurised, e.g. by explosion	F04F1/16	F04F1/16		203
F04F1/18	8	the fluid medium being mixed with, or generated from the liquid to be pumped	F04F1/18	F04F1/18		702
F04F1/20	9	specially adapted for raising liquids from great depths, e.g. in wells	F04F1/20	F04F1/20		90
F04F3/00	7	Pumps using negative pressure acting directly on the liquid to be pumped (siphons F04F10/00)	F04F3/00	F04F3/00		415
F04F5/00	7	Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow (diffusion pumps F04F9/00; combination of jet pumps with pumps of other than jet type F04B; use of jet pumps for priming or boosting non-positive-displacement pumps F04D)	F04F5/00	F04F5/00		152
F04F5/02	8	the inducing fluid being liquid	F04F5/02	F04F5/02		122
F04F5/04	9	displacing elastic fluids	F04F5/04	F04F5/04		374
F04F5/06	10	of rotary type	F04F5/06	F04F5/06		58
F04F5/08	10	the elastic fluid being entrained in a free falling column of liquid	F04F5/08	F04F5/08		142
F04F5/10	9	displacing liquids, e.g. containing solids, or liquids and elastic fluids	F04F5/10	F04F5/10		765
F04F5/12	10	of multi-stage type	F04F5/12	F04F5/12		60
F04F5/14	8	the inducing fluid being elastic fluid	F04F5/14	F04F5/14		152
F04F5/16	9	displacing elastic fluids	F04F5/16	F04F5/16		1547
F04F5/18	10	for compressing	F04F5/18	F04F5/18		152
F04F5/20	10	for evacuating	F04F5/20	F04F5/20		588
F04F5/22	11	of multi-stage type	F04F5/22	F04F5/22		278
F04F5/24	9	displacing liquids, e.g. containing solids, or liquids and elastic fluids	F04F5/24	F04F5/24		490
F04F5/26	10	of multi-stage type (F04F5/28 takes precedence)	F04F5/26	F04F5/26		41
F04F5/28	10	Restarting of inducing action	F04F5/28	F04F5/28		9
F04F5/30	11	with axially-slidable combining nozzle	F04F5/30	F04F5/30		16
F04F5/32	11	with hinged flap in combining nozzle	F04F5/32	F04F5/32		37
F04F5/34	9	characterised by means for changing inducing fluid source	F04F5/34	F04F5/34		13
F04F5/36	9	characterised by using specific inducing fluid	F04F5/36	F04F5/36		55
F04F5/38	10	the inducing fluid being mercury vapour	F04F5/38	F04F5/38		11
F04F5/40	10	the inducing fluid being oil vapour	F04F5/40	F04F5/40		5
F04F5/42	8	characterised by the input flow of inducing fluid medium being radial or tangential to output flow (cyclones B04C)	F04F5/42	F04F5/42		290
F04F5/44	8	Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02&#160;-&#160;F04F5/42	F04F5/44	F04F5/44		1067
F04F5/46	9	Arrangements of nozzles	F04F5/46	F04F5/46		1461
F04F5/461	10	{Adjustable nozzles}	F04F5/46	F04F5/46		952
F04F5/462	10	{with provisions for cooling the fluid}	F04F5/46	F04F5/46		126
F04F5/463	10	{with provisions for mixing}	F04F5/46	F04F5/46		300
F04F5/464	10	{with inversion of the direction of flow}	F04F5/46	F04F5/46		287
F04F5/465	10	{with supersonic flow (mixing of supersonic fluids B01F25/20)}	F04F5/46	F04F5/46		98
F04F5/466	10	{with a plurality of nozzles arranged in parallel}	F04F5/46	F04F5/46		807
F04F5/467	10	{with a plurality of nozzles arranged in series}	F04F5/46	F04F5/46		400
F04F5/468	10	{with provisions for priming}	F04F5/46	F04F5/46		99
F04F5/469	10	{for steam engines}	F04F5/46	F04F5/46		375
F04F5/48	9	Control	F04F5/48	F04F5/48		614
F04F5/50	10	of compressing pumps	F04F5/50	F04F5/50		74
F04F5/52	10	of evacuating pumps	F04F5/52	F04F5/52		341
F04F5/54	8	Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type	F04F5/54	F04F5/54		807
F04F7/00	7	Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein	F04F7/00	F04F7/00		496
F04F7/02	8	Hydraulic rams	F04F7/02	F04F7/02		375
F04F9/00	7	Diffusion pumps	F04F9/00	F04F9/00		1010
F04F9/02	8	of multi-stage type	F04F9/02	F04F9/02		14
F04F9/04	8	in combination with fore pumps, e.g. use of isolating valves	F04F9/04	F04F9/04		104
F04F9/06	8	Arrangement of vapour traps	F04F9/06	F04F9/06		54
F04F9/08	8	Control	F04F9/08	F04F9/08		34
F04F10/00	7	Siphons	F04F10/00	F04F10/00		990
F04F10/02	8	Gravity-actuated siphons	F04F10/02	F04F10/02		112
F04F13/00	7	Pressure exchangers	F04F13/00	F04F13/00		686
F04F99/00	7	Subject matter not provided for in other groups of this subclass	F04F99/00	F04F99/00		93
