F04F - Pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped; Siphons

More topics under "F04F - Pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped; Siphons" (8,836)
F04F 1 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped (1,650)
F04F 10 - Siphons (775)
F04F 13 - Pressure exchangers (345)
F04F 3 - Pumps using negative pressure acting directly on the liquid to be pumped (370)
F04F 5 - Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow (4,425)
F04F 7 - Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein (455)
F04F 9 - Diffusion pumps (148)
F04F 99 - Subject matter not provided for in other groups of this subclass (668)

Patents for F04F - Pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped; Siphons (28)
07/2011
07/26/2011	CA2435580C Gas lift valve with central body venturi for controlling the flow of injection gas in oil wells producing by continuous gas lift
08/2006
08/02/2006	EP1360418B1 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift
06/2005
06/29/2005	EP1360418A4 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift
03/2004
03/30/2004	CA2274003C Self-priming siphon, in particular for irrigation
11/2003
11/12/2003	EP1360418A1 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift
09/2003
09/03/2003	CN1119926C Self-priming siphon, in particular for irrigation
05/2003
05/27/2003	US6568473 Gas lift valve with central body venturi
11/2002
11/21/2002	WO2002059485B1 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift
08/2002
08/01/2002	WO2002059485A1 Gas lift valve with central body ventury for controlling the flow of injection gas in oil wells producing by continuous gas lift
07/2002
07/25/2002	US20020096332 Gas lift valve with central body venturi for controlling the flow of injection gas in oil wells producing by continuous gas lift
03/2001
03/14/2001	EP0954217B1 Self-priming siphon, in particular for irrigation
01/2001
01/30/2001	US6178984 Self-priming siphon, in particular for irrigation
11/2000
11/07/2000	US6142746 Pulsating valve for hydraulic rams having a liquid vessel attached thereto
01/2000
01/19/2000	CN1241900A Self-priming siphon, in particular for irrigation
12/1999
12/15/1999	CN1238827A Pump device
11/1999
11/10/1999	EP0954217A1 Self-priming siphon, in particular for irrigation
11/03/1999	EP0953117A1 A pump device
01/1999
01/06/1999	CN2303039Y Sunshade and rain-proof awning
07/1998
07/09/1998	WO1998028967A1 Self-priming siphon, in particular for irrigation
04/1998
04/30/1998	WO1998017920A1 A pump device
04/30/1998	CA2269765A1 A pump device
12/1997
12/10/1997	EP0524313B1 Dispensing method and apparatus
11/1994
11/15/1994	US5363888 Dispensing method and apparatus
07/1994
07/05/1994	US5326228 Liquid ejection mixing and dispensing apparatus
06/1993
06/24/1993	WO1992014063A3 Dispensing method and apparatus
01/1993
01/27/1993	EP0524313A1 Dispensing method and apparatus
08/1992
08/20/1992	WO1992014063A2 Dispensing method and apparatus
01/1989
01/03/1989	CA1247984A1 Valve for use with hydraulic ram assemblies