| Patents for F04B 43 - Machines, pumps, or pumping installations having flexible working members (13,111) |
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| 02/20/1991 | EP0413069A1 Dual chamber pumping apparatus |
| 02/20/1991 | CN2071715U Manual siphon fueller for fuel tank of automobile |
| 02/20/1991 | CN2071714U Device for inducing liquid to flow by gravity |
| 02/19/1991 | US4993925 Diaphragm pump with noise intercepting insert |
| 02/15/1991 | CA2003402A1 Dual chamber pumping apparatus |
| 02/14/1991 | DE3926343A1 Membrane pump with tubular membrane in pipe casing - has outer casings and inner support pipe with central working fluid control valve |
| 02/13/1991 | EP0412856A1 Device for the propulsion of a fluid |
| 02/13/1991 | EP0412270A1 Micromechanical compressor cascade and method of increasing the pressure at extremely low operating pressure |
| 02/13/1991 | EP0412093A1 Pneumatic valve, particularly for control of compressed-air-operated membrane pumps. |
| 02/13/1991 | CN2071264U Telescopinc soft hose liquid suction tube |
| 02/13/1991 | CN2071263U Liquid self flow pump device |
| 02/09/1991 | CA2020472A1 Pulseless piston pump |
| 02/07/1991 | WO1991001464A1 Anti-return valve, particularly for micropump and micropump provided with such a valve |
| 02/06/1991 | EP0411564A2 Pump for liquids |
| 02/06/1991 | EP0411543A2 Peristaltic pump |
| 02/05/1991 | US4990066 Metering pump |
| 02/05/1991 | US4990062 Positive displacement pumps |
| 01/30/1991 | EP0410872A1 Transfusion pump |
| 01/30/1991 | EP0410394A1 Internally pressurized bellows pump |
| 01/30/1991 | EP0410125A1 Piston unit with rolling membrane |
| 01/30/1991 | CN2070369U Full-sealing corrosion-resistant pump |
| 01/29/1991 | US4988069 Stepping motor mounting |
| 01/29/1991 | CA1279616C System for dispensing precisely metered quantities of a fluid and method ofutilizing the system |
| 01/26/1991 | CA2021810A1 Internally pressurized bellows pump |
| 01/24/1991 | DE4019594A1 Pump for oil industry has chamber with flexible bags - and can pump mixt. contg. gases, liq. hydrocarbon(s) and solid particles without problems affecting rotary pumps |
| 01/23/1991 | EP0409001A1 Liquid injection device |
| 01/16/1991 | EP0408083A1 Aggressive liquids dosage membrane pump |
| 01/16/1991 | EP0407517A1 Diaphragm pump. |
| 01/15/1991 | US4984970 Arrangements on coned rings which are applicable in high pressure pumps and related devices |
| 01/10/1991 | WO1990013795A3 Enhanced pressure measurement flow control system |
| 01/10/1991 | DE3921084A1 Electrically-driven diaphragm vacuum pump or pressure pump - has cage around electromagnet coil through which central armature shaft extends between two vibratory spring plates |
| 01/09/1991 | EP0407317A1 Adjustable membrane pump |
| 01/09/1991 | EP0407315A1 Membrane pump |
| 01/09/1991 | EP0127674B1 Real time servo control apparatus and method |
| 01/09/1991 | CN2069037U Pump having fluid automatic drive |
| 01/09/1991 | CN2069034U Pumps by muscle power operation |
| 01/08/1991 | US4983876 Diaphragm |
| 01/08/1991 | US4983104 Bellows-type pump |
| 01/08/1991 | US4983102 Self-enclosed filter pumping system |
| 01/08/1991 | US4982903 Coating material dispensing system |
| 01/08/1991 | CA2020583A1 Diaphragm pump |
| 01/08/1991 | CA1278843C Flow control system using boyle's law |
| 01/02/1991 | CN2068606U Membrane hand civil water pump |
| 01/01/1991 | US4981418 Internally pressurized bellows pump |
| 12/27/1990 | WO1990015930A1 Variable roller pump tubing |
| 12/26/1990 | CN2068160U Mampower pumping sprinkler |
| 12/21/1990 | WO1990015630A1 Improving blood flow |
| 12/21/1990 | CA2062733A1 Improving blood flow |
| 12/18/1990 | US4978478 Control membrane for a carburetor |
| 12/15/1990 | WO1990015929A1 Improved micro-pump |
| 12/13/1990 | DE3918805A1 Pair of bellows for inflating air bed - has combination of two functionally different hollow inflatable sections |
| 12/12/1990 | CN2067331U Man-powered double-suction diaphragm pump |
| 12/11/1990 | US4976590 Fluid conduit-responsively adjustable pump arrangement and pump/conduit arrangement and method, and fluid conduits therefor |
| 12/11/1990 | US4976162 Enhanced pressure measurement flow control system |
| 12/07/1990 | WO1990015248A1 Peristaltic pump |
| 12/07/1990 | CA2058446A1 Peristaltic pump |
| 12/06/1990 | DE3918246A1 Water pressure intensifier system - incorporates single pump with adjustable capacity |
| 12/05/1990 | EP0400693A2 High pressure pump |
| 12/05/1990 | EP0400507A2 High pressure unit |
| 12/05/1990 | CN2066907U Liquid siphon device |
| 12/04/1990 | US4975026 For limiting the maximum displacement of a member to minimize stress |
| 12/04/1990 | US4974674 Extraction system with a pump having an elastic rebound inner tube |
| 12/04/1990 | CA1277206C Diaphragm chamber device |
| 11/28/1990 | EP0399118A1 Pumping mechanism |
| 11/28/1990 | CN1047368A Pump apparatus for biomedical use |
| 11/24/1990 | WO1990014517A1 Bellow-type pump with a plurality of radially arranged bellows |
| 11/24/1990 | CA2057067A1 Bellow-type pump with a plurality of radially arranged bellows |
| 11/22/1990 | EP0398583A2 Pump apparatus for biomedical use |
| 11/22/1990 | DE4010216A1 Electrohydraulic impulse piston pump - makes use of spark discharge in dielectric fluid |
| 11/21/1990 | CN1047132A Hand pump valve tube |
| 11/20/1990 | US4971523 Dual diaphragm apparatus with diaphragm assembly and rupture detection methods |
| 11/13/1990 | US4969808 Elastic tubing pump |
| 11/07/1990 | WO1990013743A1 Peristaltic pump |
| 11/07/1990 | CN2065253U Vaccum drainer |
| 11/07/1990 | CN2065252U Drainage device for siphon |
| 11/07/1990 | CN1046788A Manual piston-free water compressor |
| 11/06/1990 | US4968229 Pressure infusion apparatus |
| 11/06/1990 | US4968225 Magnet holder for electromagnetic diaphragm pump |
| 11/06/1990 | US4968224 Vibrator for diaphragm pump and magnet holder therefor |
| 11/02/1990 | WO1990013795A2 Enhanced pressure measurement flow control system |
| 11/01/1990 | WO1990012962A1 Electric motor driven diaphragm pump |
| 10/31/1990 | EP0394442A1 Stretched tube pump |
| 10/31/1990 | DE4012350A1 Pump for delivery of liq. concrete - has arrangement of membranes in hollow ball working chambers |
| 10/31/1990 | CN2064831U Elastic soft piston hand water pump |
| 10/30/1990 | US4966533 Vacuum pump with rotational sliding piston support |
| 10/30/1990 | US4966528 Apparatus for controlling the hydraulic circuit of a piston diaphragm pump |
| 10/26/1990 | CA2009361A1 Electric motor driven diaphragm pump |
| 10/24/1990 | EP0393800A2 Valve device |
| 10/24/1990 | EP0393354A1 Medical pump appliance |
| 10/18/1990 | WO1990012209A1 Constant flow-rate micropump |
| 10/17/1990 | EP0392978A1 Constant flow rate micro pump |
| 10/16/1990 | US4963075 Radial diaphragm pump |
| 10/11/1990 | CA2014235A1 Micropump having a constant output |
| 10/03/1990 | EP0390298A2 Fluid pump apparatus |
| 10/03/1990 | EP0390161A2 Electromagnetically controlled diaphragm pump and its usage |
| 10/02/1990 | CA1274810A1 Throw-away distributing pump for liquids or pastes |
| 10/02/1990 | CA1274721A1 Downhole inflatable packer pump and testing apparatus |
| 09/30/1990 | CA2013561A1 Electromagnetically controllable membrane pump and use thereof |
| 09/27/1990 | DE3909800A1 Diaphragm pump for pneumatic delivery of fluidised bulk solids |
| 09/26/1990 | EP0388787A1 Miniature peristaltic pump |