| Patents for F04F 1 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped (1,650) |
|---|
| 05/01/1979 | CA1053812A1 Device for purifying sewer water in small sewer systems |
| 04/17/1979 | US4149829 Gas lift valve and mandrel combination with improvement of the screening for said valve |
| 03/20/1979 | CA1050821A1 Air-pressure actuated slurry pump |
| 01/30/1979 | US4136721 Method and apparatus for transferring liquid from a storage container to a vessel in a controlled manner |
| 01/23/1979 | US4135364 Air lift pump energy conversion apparatus |
| 01/23/1979 | CA1046893A1 Vacuum drainage system |
| 12/26/1978 | US4131214 Method and apparatus for emptying the contents of a tank carried by an engine-powered vehicle |
| 12/20/1978 | EP0000093A1 A pump dispenser for a vacuum bottle |
| 10/17/1978 | CA1040526A1 Method and apparatus for transferring liquid from a storage container to a vessel in a controlled manner |
| 10/10/1978 | US4119244 Unitary mounted air-pressure pump and liquid outlet |
| 10/03/1978 | US4117978 System for feeding solutions and suspensions |
| 09/26/1978 | US4116211 Valve assembly |
| 09/12/1978 | US4113147 Vacuum bottle with air pump to pressurized bottle to effect dispensing |
| 09/05/1978 | US4110980 Apparatus for producing mechanical kinetic energy from falling water |
| 08/22/1978 | US4108380 Tank spreader |
| 06/13/1978 | US4094616 Steam-heater-pump |
| 06/06/1978 | US4093551 Device for purifying sewer water in small sewer systems |
| 06/06/1978 | US4093108 Syringe adapted to overcome a pressure resistance |
| 05/30/1978 | US4092087 Air operated pump |
| 05/23/1978 | US4090814 Gas-lift device |
| 05/16/1978 | US4089621 Selectively pressurized tank for hydraulic fluid |
| 04/11/1978 | US4083661 Pneumatic sewage ejector |
| 12/06/1977 | US4061273 Tank spreader |
| 11/22/1977 | US4059123 Cleaning and preservation unit for turbine engine |
| 11/08/1977 | US4057364 Fluid transfer systems and valves therefor |
| 09/27/1977 | US4050854 Fluid lifting apparatus |
| 07/26/1977 | US4038511 Method for electropneumatic conversion |
| 07/26/1977 | US4037992 Slurry continuous pressure-feeding apparatus |
| 06/14/1977 | US4029094 Device for regulating perfusion flowrate |
| 05/24/1977 | US4025237 Latching magnetic level sensor |
| 05/24/1977 | US4025235 System for improving oil well production |
| 05/10/1977 | US4022687 Method for the non-mechanical conveying of a collected quantity of liquid and apparatus for the performance of the method |
| 05/03/1977 | US4021147 Gas pressure driven pump |
| 01/11/1977 | US4002440 Method and apparatus for operating on liquids and gases |
| 12/14/1976 | US3996846 Coffee maker with improved hot water pump |
| 11/30/1976 | US3994082 Air operated dredging apparatus |
| 11/16/1976 | US3991825 Secondary recovery system utilizing free plunger air lift system |
| 08/24/1976 | US3976124 Cooling-controlled tank for hydraulic fluid |
| 08/03/1976 | US3972651 Solar-powered pump |
| 08/03/1976 | US3972650 Sewage system |
| 07/27/1976 | US3971437 Apparatus for dewatering boreholes |
| 07/27/1976 | US3971400 Portable vacuum and pressure liquid tank apparatus |
| 07/20/1976 | US3969834 Airlift |
| 06/15/1976 | US3963377 Pneumatically powered pump system |
| 05/25/1976 | US3958346 Multiple pumping chamber dredging apparatus |
| 03/02/1976 | US3941511 Pressurized |
| 03/02/1976 | US3941510 Artificial lift for oil wells |
| 03/02/1976 | US3941509 Pumping system |
| 01/06/1976 | US3930757 Pressure equalizing pump |
| 01/06/1976 | US3930755 Air-pressure actuated slurry pump |