| Patents for F04B 19 - Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups (2,867) |
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| 03/21/1989 | US4813849 Fluid pump with air inducer |
| 03/08/1989 | CN1031582A Valve gear for internal combustion machine driven by eccentric rotary piston pump |
| 02/21/1989 | US4805804 Potted plant feeder |
| 01/31/1989 | US4800801 Pump |
| 12/20/1988 | US4792283 For transporting liquid by bubbles |
| 09/20/1988 | US4772184 Piston pump for abrasive conveyances |
| 09/13/1988 | US4770614 Apparatus for transferring fluid medium |
| 08/10/1988 | EP0277131A1 Loop pump. |
| 07/19/1988 | US4758131 Apparatus for displacing high viscous substances |
| 06/21/1988 | CA1238243A1 Fluid powered generator |
| 06/08/1988 | CN87213430U Piston for reciprocating pump |
| 06/07/1988 | CA1237679A1 Lube oil ring pump |
| 06/01/1988 | CN87106493A 柱塞泵 Piston |
| 04/27/1988 | EP0264632A2 Coaxial - piston pumping unit |
| 04/19/1988 | US4738598 Metering pump with annular elements |
| 03/09/1988 | CN87106319A Reciprocal multifunctional suction-compression pump with a cylinder and two chambers |
| 02/23/1988 | US4726747 For repeatedly discharging a medium such as pharmaceutical products |
| 02/17/1988 | EP0255872A2 Device for pumping upwards a rinsing stream |
| 01/07/1988 | EP0251664A1 Heat-driven pump |
| 12/15/1987 | US4712984 Process and apparatus for circulating fluids by pumping |
| 12/15/1987 | US4712667 Device for recovering fluid from a well |
| 11/25/1987 | CN87102904A 负压计量泵 Negative pressure metering pump |
| 10/21/1987 | EP0242145A2 Apparatus for displacing high viscous substances |
| 09/09/1987 | EP0236166A1 Process and installation for circulating fluids by pumping |
| 08/27/1987 | DE3705887A1 Pump |
| 08/12/1987 | CN86204287U Uniformly rotating pumping unit |
| 08/04/1987 | US4684335 Pumps |
| 07/22/1987 | CN86207446U Rotary scoop-type metering pump |
| 07/02/1987 | WO1987003936A1 Pump |
| 07/02/1987 | WO1987003935A1 Device for pumping fluid medium |
| 06/10/1987 | CN86201697U Gas-liquid mixture pump |
| 05/12/1987 | CA1221668A1 Hydrogen compressor |
| 04/23/1987 | WO1987002425A1 Loop pump |
| 04/22/1987 | CN86106587A Loop pump |
| 04/14/1987 | US4657489 Fluid pumping apparatus |
| 01/21/1987 | CN85105455A Mixing pump used for delivering and effective mixing (homogenizing) of two or more liquids (gases) with constant (but adjustable) proportion of liquids |
| 01/20/1987 | US4637784 Metering pump with diaphragm |
| 12/23/1986 | CA1215582A1 Vapor pressure pump |
| 12/10/1986 | EP0204011A1 Aggregate with through flow by a fluid |
| 11/12/1986 | EP0201147A1 Pump |
| 10/08/1986 | CN85105320A 泵 Pump |
| 10/07/1986 | CA1212313A1 Hydraulic well pump |
| 09/16/1986 | US4611970 Apparatus for removing water from the ground |
| 08/27/1986 | CN85100395A Superhigh pressure liquid booster |
| 07/08/1986 | CA1207112A1 Fluid pressure operated reciprocating mechanism |
| 06/18/1986 | EP0184686A1 Piston pump for an active-substance dispenser |
| 06/11/1986 | EP0184207A2 Method for manufacturing a trough for a hydraulic screw |
| 06/04/1986 | EP0183380A2 Positive-displacement screw pump |
| 05/27/1986 | US4591024 Lube oil ring pump |
| 04/22/1986 | CA1203499A1 Animal waste pumping system |
| 02/25/1986 | US4571939 Hydraulic well pump |
| 12/17/1985 | US4558985 Pump with screw conveyors on each end |
| 12/03/1985 | US4556368 Vapor pressure pump |
| 11/26/1985 | US4555307 Sea water distillation system |
| 11/12/1985 | US4552514 Wave driven work extracting device |
| 10/09/1985 | EP0157217A1 Lube oil ring pump |
| 08/27/1985 | CA1192457A1 Fluid injection system for internal combustion engine |
| 07/09/1985 | US4527460 Radial piston machine |
| 06/05/1985 | EP0143521A2 Pump having piston and cylinder rotatable respectively about spaced axes transverse to the reciprocating axis |
| 05/21/1985 | CA1187330A1 Constant pressure pump |
| 04/09/1985 | US4509903 Catalyst slave pump |
| 03/19/1985 | US4505120 Hydrogen compressor |
| 03/05/1985 | US4502535 Jet engine pump and downhole heater |
| 09/11/1984 | US4470759 Capillary check valve pump and method |
| 09/04/1984 | US4469472 Pump mechanism powered by gaseous expansion |
| 08/08/1984 | EP0115159A2 Hydrogen compressor |
| 07/24/1984 | US4461245 Fluid injection system for internal combustion engine |
| 07/18/1984 | EP0113486A2 Proportioning device |
| 07/17/1984 | US4459718 Side view mirror mechanism |
| 06/26/1984 | US4456119 Device for elevating a liquid |
| 06/13/1984 | EP0110552A1 Improvements in or relating to pumps for dispensing beverages |
| 05/29/1984 | US4451210 Diaphragm vapor pump |
| 05/22/1984 | US4449894 Centrifugal-reciprocating compressor |
| 05/01/1984 | US4445826 Peristaltic pump apparatus |
| 05/01/1984 | US4445823 Animal waste pumping system |
| 04/17/1984 | US4443163 Fluid motor or pump |
| 03/27/1984 | US4439115 Manure transfer system having a pull pump |
| 03/21/1984 | EP0103536A1 Piston pump |
| 03/06/1984 | US4435363 Nuclear fuel processing |
| 03/06/1984 | US4435133 Free piston engine pump with energy rate smoothing |
| 02/14/1984 | US4431385 Solar displacement pump |
| 01/18/1984 | EP0098419A1 Equipment for the addition of a disinfectant to water |
| 01/18/1984 | EP0098340A1 Screw conveyer with a screw supported at both ends |
| 11/30/1983 | EP0095288A1 Bore hole pump |
| 11/22/1983 | US4416589 Vibration actuated liquid pump |
| 11/22/1983 | US4416588 Air compressor for paint pumps |
| 11/22/1983 | US4416587 Heat operated pump |
| 11/15/1983 | US4415313 Hydraulic generator with free-piston engine |
| 10/19/1983 | EP0091752A1 Water injection system for internal combustion engine |
| 09/27/1983 | US4406587 Vibration actuated liquid pump |
| 09/20/1983 | US4405286 Actively suspended counter-rotating machine |
| 08/30/1983 | US4401159 Jet engine pump and downhole heater |
| 08/24/1983 | EP0086725A1 Hydraulic-pressure generator |
| 07/12/1983 | US4392791 Pressure pumping and priming pump apparatus |
| 07/12/1983 | CA1149673A2 Concrete pump valve |
| 06/07/1983 | US4386889 Radial wave pump |
| 03/08/1983 | CA1142491A1 Liquid dispenser |
| 02/01/1983 | CA1140391A1 Screw pump for conveying waste water and the like |
| 01/18/1983 | US4368909 Oil well bailer apparatus |
| 01/12/1983 | EP0069520A2 Continuous countercurrent liquid-solids contactor |