| Patents for F04B 9 - Piston machines or pumps characterised by the driving or driven means to or from their working members (9,236) |
|---|
| 04/10/1991 | EP0421940A1 Gas driven pump |
| 04/10/1991 | EP0421461A1 Axial piston pump |
| 04/10/1991 | CN2074827U Negative siphon oil feeder |
| 04/10/1991 | CN2074826U Single cylinder water pump spraying device |
| 04/10/1991 | CN2074825U Hand oil pump |
| 04/10/1991 | CN1050590A High pressure quick inflator |
| 04/09/1991 | US5006103 Disposable container for a centrifuge |
| 04/03/1991 | EP0420481A2 Dual action piston pump |
| 04/03/1991 | EP0419695A1 Slurry pumping apparatus |
| 04/03/1991 | EP0208770B1 Fluid means for data transmission |
| 04/03/1991 | CN2074379U Agricultural waterwheel |
| 04/03/1991 | CN2074378U Pressure oil pump for oil drum |
| 04/02/1991 | US5004404 Variable positive fluid displacement apparatus with movable chambers |
| 03/28/1991 | DE4029436A1 Pressure controller for water jet cutting equipment - includes auxiliary high pressure pump compensating drops between pressure peaks of reciprocating pistons |
| 03/28/1991 | CA2018087A1 Dual action piston pump |
| 03/27/1991 | EP0418926A1 Device for dispensing metered quantities of liquids from a storage container |
| 03/27/1991 | CN2073945U Siphonal device for infusion |
| 03/26/1991 | US5002469 Switching device for reciprocating pumps |
| 03/26/1991 | US5002468 Switching device for reciprocating pumps |
| 03/26/1991 | US5002207 Precompression pump, for dispensing liquid products from containers |
| 03/26/1991 | CA1281938C Reverse osmosis system and automatic cycling booster pump therefor |
| 03/20/1991 | CN2073486U Hand drawing water pump |
| 03/19/1991 | US5000845 Reverse osmosis system and automatic cycling booster pump therefor |
| 03/13/1991 | EP0416971A1 Adjustable hand-operated pump on the neck of a vessel |
| 03/13/1991 | CN2073038U High efficiency light inflater |
| 03/13/1991 | CN2073037U Foot-treaded high pressure inflater |
| 03/12/1991 | US4998633 Stopper for a container such as a bottle and including slit valve structure, for use with a pump for altering and thereafter maintaining altered pressure in the container |
| 03/12/1991 | CA1281195C Multiple machine drive shaft and coupling adapter assembly |
| 03/06/1991 | EP0414933A1 Shaft, especially a rotor shaft of an electric motor for driving a pump, extended with an excentric end trunnion |
| 03/06/1991 | CN2072605U Hand pumper |
| 03/06/1991 | CN2072604U Hand oil-well pump |
| 03/06/1991 | CN2072603U High-pressure well head |
| 03/05/1991 | US4997346 Well pumping systems |
| 02/27/1991 | CN1011773B Apparatus for supplying liquid |
| 02/26/1991 | US4995793 Reverse osmosis system and automatic cycling booster pump therefor |
| 02/26/1991 | CA1280718C2 Pump and stopper apparatus |
| 02/21/1991 | WO1991002158A1 Pulseless piston pump |
| 02/19/1991 | US4993924 Reciprocating pump |
| 02/06/1991 | CN2070833U Oil pumping unit |
| 02/05/1991 | US4990062 Positive displacement pumps |
| 02/05/1991 | US4990058 At a selected flow rate |
| 02/05/1991 | US4989469 Eccentric gear pump and drive mechanism therefor |
| 01/30/1991 | EP0410857A1 Assembly for dispensing at least one product, especially cosmetics, in cream, fluid or powder form |
| 01/30/1991 | EP0410394A1 Internally pressurized bellows pump |
| 01/30/1991 | CN2070366U Fuel feeding device for automobile |
| 01/29/1991 | CA1279618C Pump dispenser for viscous fluids |
| 01/26/1991 | CA2021810A1 Internally pressurized bellows pump |
| 01/24/1991 | DE4022379A1 Control of pressure transmitter for pump - involves use of piston subject to alternating pump pressures |
| 01/23/1991 | CN2069933U Portable hand pump round box |
| 01/22/1991 | US4986727 Pressure-operated oil and gas well swabbing device |
| 01/16/1991 | EP0408127A2 Pressure pump for flowable mediums |
| 01/16/1991 | EP0408083A1 Aggressive liquids dosage membrane pump |
| 01/16/1991 | CN2069493U Piston type high pressure inflater |
| 01/16/1991 | CN2069492U Drainage device for liquid |
| 01/16/1991 | CN2069491U Double action pressure pump |
| 01/15/1991 | US4984601 Unit apt to act upon the flow |
| 01/10/1991 | WO1991000417A1 Diaphragm pumps |
| 01/09/1991 | CN2069034U Pumps by muscle power operation |
| 01/09/1991 | CN2069033U Kotary hand air inflating cylinder for deformity men |
| 01/08/1991 | US4983876 Diaphragm |
| 01/08/1991 | US4983305 Power recovery pump turbine |
| 01/08/1991 | US4983103 Annular plunger pump |
| 01/02/1991 | CN2068606U Membrane hand civil water pump |
| 01/02/1991 | CN2068604U Marine hand emergency fire pump |
| 01/02/1991 | CN2068603U Farm water pump |
| 01/02/1991 | CN2068602U Folding rocker arm air pump |
| 01/02/1991 | CN2068601U Double-piston wobble pump |
| 01/02/1991 | CN2068600U Plunger type sucker |
| 01/01/1991 | US4981418 Internally pressurized bellows pump |
| 12/26/1990 | CN2068160U Mampower pumping sprinkler |
| 12/26/1990 | CN2068159U Multi-functional high-efficient hand pump |
| 12/26/1990 | CN2068158U High-efficient manpower pump |
| 12/26/1990 | CN2068157U Dual-cylinder reciprocating pump |
| 12/25/1990 | US4979428 Reciprocating air compressor with improved drive linkage |
| 12/19/1990 | EP0402390A1 Control arrangement for two-cylinder pumps for viscous liquids. |
| 12/19/1990 | CN2067771U Hand-operated big-flow grease charger |
| 12/19/1990 | CN2067769U Suction tube type fuel charger |
| 12/18/1990 | CA1277867C Lubrication pump |
| 12/15/1990 | WO1990015929A1 Improved micro-pump |
| 12/12/1990 | CN2067331U Man-powered double-suction diaphragm pump |
| 12/12/1990 | CN2067329U Hand liquid pump |
| 12/05/1990 | EP0400507A2 High pressure unit |
| 12/05/1990 | CN2066905U Pumping device |
| 12/05/1990 | CN2066904U Double tub multi-purpose high pressure water pump |
| 11/29/1990 | WO1990014578A1 Pivot-action portioning apparatus |
| 11/29/1990 | WO1990014270A1 Food dispensing method and apparatus and metering device therefor |
| 11/28/1990 | EP0398977A1 Apparatus for removing fluid from the ground and method for same |
| 11/28/1990 | CN2066512U Manual liquid adder |
| 11/28/1990 | CN2066511U Simple manpower water pump |
| 11/28/1990 | CN2066510U Siphon oil pumping device for car |
| 11/22/1990 | EP0398209A1 Reciprocating oil pump |
| 11/22/1990 | EP0397922A2 Lubricant pump |
| 11/22/1990 | DE4010216A1 Electrohydraulic impulse piston pump - makes use of spark discharge in dielectric fluid |
| 11/21/1990 | CN2066085U Manpower submersible pump |
| 11/21/1990 | CN1047132A Hand pump valve tube |
| 11/20/1990 | US4971531 Pump arrangement driven by compressed-air |
| 11/20/1990 | US4970861 Geared rotary-to-linear motion converting system for bidirectional pump drive |
| 11/14/1990 | EP0397332A1 Reverse osmosis system with automatic cycling booster pump therefor |
| 11/14/1990 | CN2065682U Straight pump with winding sealing sleeve |
| 11/14/1990 | CN2065681U Manpower water pump |