Patents
Sitemap › F04 - Positive-displacement machines for liquids; Pumps for liquids or elastic fluids › F04F - Pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped; Siphons › F04F 3 - Pumps using negative pressure acting directly on the liquid to be pumped
Patents for F04F 3 - Pumps using negative pressure acting directly on the liquid to be pumped (370)
06/1997
06/11/1997CN1151775A A vacuum unit and a vacuum toilet system comprising such a unit
06/04/1997CN2255520Y Liquid-suction pump
05/1997
05/28/1997CN2254964Y Flow-guiding means
03/1997
03/26/1997CN2250440Y Fully automatic vacuum device
03/05/1997EP0760039A1 A vacuum unit and a vacuum toilet system comprising such a unit
12/1996
12/27/1996EP0749534A1 Engine coolant extractor/injector with double shut-off coupling
11/1996
11/27/1996EP0744180A2 Breast pump
11/13/1996CN2240063Y Siphon drain pump
09/1996
09/04/1996CN2234519Y Priming pump
04/1996
04/17/1996CN2224943Y Siphon pump
01/1996
01/18/1996WO1996001345A1 A vacuum unit and a vacuum toilet system comprising such a unit
01/18/1996CA2193950A1 A vacuum unit and a vacuum toilet system comprising such a unit
11/1995
11/08/1995CN2212099Y 真空负压装置 Vacuum device
10/1995
10/11/1995EP0675987A1 Suction device
10/04/1995EP0587678B1 A pump system
09/1995
09/26/1995US5452765 For removing fluids from a subterranean formation
09/14/1995WO1995024564A1 Engine coolant extractor/injector with double shut-off coupling
09/14/1995CA2183574A1 Engine coolant extractor/injector with double shut-off coupling
07/1995
07/27/1995WO1995011354A3 Suction device
06/1995
06/28/1995EP0660001A1 Pump device for sensitive liquids
06/28/1995CN1104302A Water-pumping method by means of steam and its apparatus
06/27/1995US5427505 Engine coolant extractor/injector with double shut-off coupling
05/1995
05/17/1995CN2197498Y Self sucking nozzle
04/1995
04/27/1995WO1995011354A2 Suction device
04/20/1995DE4407053C1 Method for the generation and/or control of flows
04/11/1995US5405247 Pre-charged vacuum fluid charge/disposal apparatus
03/1995
03/28/1995US5400858 Groundwater recovery system
03/23/1995WO1995008043A1 Groundwater recovery system
01/1995
01/12/1995DE4335021A1 Method and arrangement for transporting liquids with a high gas portion in pipelines
07/1994
07/19/1994US5329982 Method and apparatus for internal combustion engine coolant extractor/injector with coupling
03/1994
03/31/1994DE4232361A1 Sensitive liq. transport device - provides suction lift action e.g. in biological clarification plant
03/23/1994EP0587678A1 A pump system.
09/1993
09/07/1993US5242273 Method and apparatus for internal combustion engine coolant extractor/injector
07/1993
07/29/1993DE4202253A1 Automatic lifting tower for coastal drainage projects - has suction containers joined by riser pipes in form of cascade
04/1993
04/01/1993WO1993006373A1 Method and apparatus for automobile coolant extractor/injector
04/01/1993CA2118716A1 Method and apparatus for internal combustion engine coolant extractor/injector
03/1993
03/31/1993EP0534663A2 Method, system and apparatus for transferring fluids
03/27/1993CA2077862A1 Method, system and apparatus for transferring fluids
12/1992
12/30/1992CN2126338U Partition heat-exchanging water-cooling air-conditioner
12/10/1992WO1992021879A1 A pump system
12/1991
12/11/1991EP0460271A1 Process and device for sucking up liquid from a container
04/1990
04/12/1990DE3830716A1 System for raising water to a higher level
03/1990
03/14/1990CN2054500U Automatic vacuum fast-speed oil-sucking (refuelling) machine
02/1990
02/14/1990CN2052834U Air pressure water suction device
07/1989
07/04/1989US4844797 Vacuum extraction system
04/1989
04/19/1989CN2036220U Liquid transferring controller
04/19/1989CN2036219U Manual siphon liquid pumping device
02/1989
02/01/1989CN2031601U Rice thresher set with pedal micropump
11/1988
11/09/1988CN88210245U Hand operating pneumatic liquid pump
08/1987
08/19/1987CN86100661A Multi-pipe pump
06/1987
06/09/1987US4671741 Pipe for elevating liquids through successively arranged accumulating and communicating portions, and device provided therewith
11/1986
11/05/1986EP0199860A1 Water lift system
07/1986
07/08/1986US4599048 Industrial suction apparatus
11/1985
11/19/1985CA1196817A1 Pressure differential liquid transfer system
05/1985
05/07/1985US4514977 To create a liquid energy head at an elevational B
05/1984
05/09/1984EP0107950A1 Industrial suction apparatus
01/1983
01/04/1983CA1138783A1 Anti-pollution equipment
08/1982
08/24/1982US4345647 Apparatus to increase oil well flow
07/1982
07/13/1982US4339232 Pressure differential liquid transfer system
06/1982
06/08/1982US4333830 Vacuum drain system
11/1981
11/03/1981CA1111620A1 Method and device for removing solid and/or liquid means containing harmful substances
03/1980
03/25/1980US4194978 Pollution control
01/1980
01/22/1980US4184527 Device for collecting oil floating on the surface of water
07/1979
07/11/1979EP0002810A1 Apparatus for removing liquids or solids containing harmful matter
05/1979
05/22/1979US4155851 Vacuum drainage system
04/1979
04/17/1979CA1052569A1 Refractory pumping apparatus
02/1979
02/27/1979US4141391 Water lifting system
02/20/1979CA1048891A1 Vacuum drain system
01/1979
01/23/1979CA1046893A1 Vacuum drainage system
03/1978
03/21/1978US4080104 Wet-dry vacuum apparatus with pump means for discharging liquid therefrom
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