| Patents for F04B 9 - Piston machines or pumps characterised by the driving or driven means to or from their working members (9,236) |
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| 05/31/1994 | CA1329894C Apparatus for removing fluid from the ground and method for same |
| 05/24/1994 | US5314025 Fluid pumping apparatus and method of pumping fluid |
| 05/18/1994 | EP0596977A1 Diaphragm pump. |
| 05/18/1994 | CN2165255Y Oiler for stir-frying in kitchen |
| 05/18/1994 | CN2165254Y Pedal hydraulic water pump |
| 05/18/1994 | CN2165253Y Plane secondary envelope cambered surface worm-gears driven reciprocating pump |
| 05/17/1994 | US5312233 Linear liquid dispensing pump for dispensing liquid in nanoliter volumes |
| 05/11/1994 | WO1994010452A1 Reciprocating engine |
| 05/04/1994 | CN2163882Y Hand-operated variable-pitch vacuum water pump |
| 05/04/1994 | CN2163881Y Machine double-cylinder water lift |
| 05/03/1994 | CA1329052C Fluid-driven pump |
| 04/28/1994 | WO1994008645A1 Self-contained drip apparatus |
| 04/28/1994 | CA2125496A1 Autonomous perfusion appliance |
| 04/26/1994 | US5306125 Dispensing pump for substances of low viscosity, especially paste-like substances |
| 04/21/1994 | DE4316985A1 Shaft drive for engine or pump - has connecting piece operating with drive-wheel on first shaft to drive second shaft |
| 04/21/1994 | DE4233990A1 High pressure cleaning equipment using piston pump - has eccentric in sideways engagement with hollow piston, having ball bearing fitting into groove in piston which has stop against which eccentric presses |
| 04/20/1994 | EP0593411A1 Fluid control and/or moving device |
| 04/20/1994 | EP0592395A1 A displacement pump as well as a pump assembly comprising two displacement pumps. |
| 04/20/1994 | CN2162543Y Water pump |
| 04/20/1994 | CN2162542Y Portable no-power perfusion pump |
| 04/13/1994 | CN2161746Y Portable fuel charger |
| 04/12/1994 | US5302090 Method and apparatus for the utilization of the energy stored in a gas pipeline |
| 04/12/1994 | US5301860 Water supply apparatus for bicycle |
| 04/07/1994 | DE4333578A1 Hydraulic pump for vehicle antilock brake - uses piston with pair of seals insertable into housing bore |
| 03/30/1994 | EP0588845A1 Device for feeding pressurized liquid to a hydraulic circuit. |
| 03/30/1994 | CN2160030Y Multi-purpose liquid adding device |
| 03/30/1994 | CN2160022Y Liquid pumping device |
| 03/23/1994 | EP0587879A1 Pressure booster |
| 03/22/1994 | US5296145 Apparatus and method for supercritical fluid extraction |
| 03/17/1994 | WO1993024754A3 A gas compressor |
| 03/09/1994 | CN1083568A Water supply booster unit for pressure pump of water source |
| 03/03/1994 | WO1994004853A1 Piston-articulating pin-connecting rod assembly for reciprocating hermetic compressors |
| 02/23/1994 | CN2157328Y Manual magnetic pump |
| 02/23/1994 | CN2157327Y Well head for pumped well |
| 02/23/1994 | CN2157326Y Slide valve type clutch pump system |
| 02/23/1994 | CN2157325Y Miniature inflator for bicycle |
| 02/23/1994 | CN2157324Y Inflating machine for tyre |
| 02/17/1994 | WO1994003727A1 Pump with internal pressure relief |
| 02/17/1994 | CA2140664A1 Pump with internal pressure relief |
| 02/16/1994 | EP0582625A1 Process and device for the controlled metering of at least one pourable component. |
| 02/16/1994 | CN2156326Y Self-flow oil suction device |
| 02/16/1994 | CN2156306Y Pocket high pressure inflator |
| 02/16/1994 | CN2156305Y Flow and suction two-purpose pump |
| 02/16/1994 | CN2156304Y Driving device for plunger pump |
| 02/16/1994 | CN2156303Y 柱塞泵传动装置 Piston actuator |
| 02/16/1994 | CN1023828C Reciprocating pump air compressor transmission mechanism |
| 02/09/1994 | EP0582159A1 Manually actuated diaphragm pump for an injection system of an internal combustion engine |
| 02/09/1994 | CN2155447Y Secondary hand-operated pump for liquid distributing system |
| 02/09/1994 | CN1081745A Multi-function automatic water pump |
| 02/03/1994 | DE4225103A1 Hub-driven pump for bicycle tyre - uses piston parallel to wheel shaft and controlled by rotating guide groove |
| 02/01/1994 | US5282552 Disposable plastic liquid pump |
| 01/25/1994 | US5281108 Diaphragm pumps |
| 01/25/1994 | US5281104 Sequential displacement piston pump |
| 01/25/1994 | US5280745 Radial-pluger-type apparatus with variable plunger stroke |
| 01/25/1994 | CA1326433C2 Valve apparatus |
| 01/19/1994 | CN2153650Y Liquid guiding pump |
| 01/18/1994 | US5279209 Rotary machine |
| 01/13/1994 | DE4222918A1 High-pressure piston machine - has piston with formed base operated via contoured piston shoe on eccentric shaft |
| 01/12/1994 | CN2152920Y Manpower hydraulic water pump |
| 01/11/1994 | US5277555 Fluid activated double diaphragm pump |
| 01/11/1994 | US5277254 Helical rod guide |
| 01/06/1994 | WO1994000689A1 Pump arrangement |
| 01/06/1994 | WO1993018306A3 Hydraulic oil well pump drive system |
| 01/05/1994 | EP0576604A1 Constant-pressure fluid supply system with multiple fluid capability |
| 01/05/1994 | EP0576467A1 Distillation. |
| 01/05/1994 | CN1023371C Compressed sprayer in additional use for inflator |
| 01/04/1994 | US5275539 Internal combustion engine oil pump |
| 01/04/1994 | US5275014 Heat pump system |
| 12/29/1993 | CN2151272Y Single cylinder hydraulic mud pump |
| 12/29/1993 | CN2151271Y 直线往复活塞压缩机 Reciprocating piston compressor |
| 12/28/1993 | US5273405 Fluid cushioning apparatus for hydraulic intensifier assembly |
| 12/28/1993 | CA1325551C Water to emulsion transformer |
| 12/23/1993 | DE4220077A1 Micro-pump for delivery of gases - uses working chamber warmed by heating element and controlled by silicon wafer valves. |
| 12/22/1993 | CN2150357Y Gun type oil-pumping machine |
| 12/22/1993 | CN2150356Y Electric-heating two-purpose hand-driven oil pump |
| 12/22/1993 | CN2150355Y Hydraulic double-action pressure increaser |
| 12/15/1993 | CN2149493Y Apparatus for pumping water for domestic water tank |
| 12/15/1993 | CN2149492Y Hand pressing type pumping device |
| 12/14/1993 | US5269930 Apparatus and method for supercritical fluid extraction |
| 12/09/1993 | WO1993024754A2 A gas compressor |
| 12/09/1993 | CA2136716A1 A gas compressor |
| 12/07/1993 | US5268103 Apparatus and method for supercritical fluid extraction |
| 12/07/1993 | US5268102 Apparatus and method for supercritical fluid extraction |
| 12/07/1993 | US5267838 Severe service compressor system |
| 12/01/1993 | CN1079026A Digit control hydraulic meter high molecular pump |
| 12/01/1993 | CN1079025A High rpessure plug pump with digit control electric motor |
| 11/30/1993 | US5265421 Underwater hydraulic system for reducing liquidborne noise |
| 11/24/1993 | CN2147368Y High stroke hand pressure pump |
| 11/24/1993 | CN2147367Y Pedal water pump device |
| 11/23/1993 | US5263828 Two-cylinder thick matter pump having a piston storage |
| 11/18/1993 | EP0426772B1 Self-reversing reciprocating piston pump with hydraulic transmission of the inversion signal |
| 11/16/1993 | US5261798 Double membrane pump |
| 11/16/1993 | CA1324371C Unit apt to act upon the flow |
| 11/16/1993 | CA1324358C Spray pump |
| 11/11/1993 | WO1993022556A1 Dosing arrangement |
| 11/10/1993 | EP0568742A1 Transfer of production fluid from a well |
| 11/10/1993 | CN2145878Y Rotating reciprocatable piston pump |
| 11/09/1993 | CA2095764A1 Transfer of production fluid from a well |
| 11/03/1993 | EP0567826A2 Solid pump |
| 11/03/1993 | CN2145269Y Pressure combined deep-water manpower well pump for household |