| Patents for F04B 49 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups (22,036) |
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| 10/01/1991 | US5052897 Compressor and method of detecting quantity of mixture of coolant and lubricant in the compressor |
| 10/01/1991 | US5052896 Regulating valve for a hydraulically adjustable control pump |
| 10/01/1991 | US5052894 Portable compressed air supply with remote control |
| 09/30/1991 | CA2038805A1 Telescopic moving part for reciprocating pump driving |
| 09/24/1991 | US5052041 Silencer |
| 09/24/1991 | US5050397 Air conditioner apparatus with starting control for parallel operated compressors based on high pressure detection |
| 09/24/1991 | US5050379 Displacement of a variable displacemet hydraulic pump and speed of an engine driving the pump controlled based on demand |
| 09/24/1991 | CA1289598C Hydraulic pump with integrated sump and accumulator |
| 09/19/1991 | DE4008127A1 Control device for variable flow vol hydrostatic machine - performs rapid control pressure correction via variable flow cross=section discharge points along control line |
| 09/18/1991 | EP0446898A2 A spring biased valve for use in a positive displacement volumetric pump |
| 09/18/1991 | EP0446897A2 Volumetric pump with spring-biased cracking valves |
| 09/18/1991 | EP0446757A1 Hydraulic system to supply a variable displacement pump |
| 09/18/1991 | EP0258424B1 Intravenous line valving system |
| 09/17/1991 | US5050233 Rotary compressor |
| 09/17/1991 | US5049043 Variable capacity vane compressor |
| 09/17/1991 | US5049042 Anti-return safety apparatus |
| 09/17/1991 | US5049040 Compressor capacity modulation |
| 09/17/1991 | US5049037 Automatic well pump skimmer level control |
| 09/17/1991 | US5048559 Valve and apparatus using said valve |
| 09/16/1991 | CA2038287A1 Spring biased valve for use in a positive displacement volumetric pump |
| 09/16/1991 | CA2038286A1 Volumetric pump with spring-biased cracking valves |
| 09/11/1991 | EP0445247A1 Anti-flooding sewage grinder pump liquid level control system in separately mounted canister |
| 09/11/1991 | EP0445241A1 Vacuum pumping group. |
| 09/10/1991 | US5046927 Wobble plate type variable capacity compressor with a capacity detector |
| 09/10/1991 | US5046926 Control device for a variable displacement hydrostatic machine |
| 09/10/1991 | US5046666 Metering dispenser with screw pump |
| 09/10/1991 | US5046397 Electrohydraulic and hydromechanical valve system for dual-piston stroke controller |
| 09/10/1991 | US5046326 Transport refrigeration system |
| 09/10/1991 | US5046244 Method for manufacturing stators, in particular extended stators, for pumps or motors with eccentric shafts |
| 09/05/1991 | DE4104033A1 Solar cell driven garden pump - has current supply controlled by storage and control electronics for operation of immersion pump |
| 09/04/1991 | CN1054296A Operation control circuit for pump motor |
| 09/03/1991 | US5044894 Capacity volume ratio control for twin screw compressors |
| 09/03/1991 | US5044889 Phase adjustable metering pump, and method of adjusting the flow rate thereof |
| 09/03/1991 | CA1288502C Pressure activated pump-off control |
| 09/03/1991 | CA1288401C Portable air pump assembly and detachable safety lamp for automotive vehicle |
| 08/29/1991 | DE4104805A1 Multi-pump hydraulic installation for auxiliaries of motor vehicle - includes hydraulic pressure sensor for time limitation of flow from start until desired |
| 08/28/1991 | CN2083646U Air volume adjustable pump |
| 08/27/1991 | US5042521 Switching apparatus for suction system in a vacuum pump |
| 08/22/1991 | DE4020407C1 High pressure fluid cleaner - has pressure pump with intake and by=pass shut=off valve |
| 08/14/1991 | EP0441681A1 Improvement in a diaphragm failure detection device for a double diaphragm pump |
| 08/14/1991 | EP0440802A1 Device for controlling hydraulic pump |
| 08/14/1991 | EP0440690A1 Body support system |
| 08/14/1991 | DE4004142A1 IC-piston engine - has adjustable displaced volume with drive shaft encompassed by eccentric wheels rotatable in relation to drive shaft |
| 08/13/1991 | US5039282 Slant plate type compressor with variable displacement mechanism |
| 08/13/1991 | US5039281 Method and apparatus for supplying compressed air to auxiliary systems of a vehicle |
| 08/13/1991 | US5039280 Pump assembly for obtaining a high vacuum |
| 08/08/1991 | WO1991011617A1 Airflow control system pump and housing |
| 08/07/1991 | EP0440320A1 Pumping system |
| 08/07/1991 | EP0439621A1 Pressure oil feed circuit device for hydraulic cylinder of operation machine |
| 08/07/1991 | EP0287670B1 Driving control apparatus for hydraulic construction machines |
| 08/07/1991 | CN1053664A Supervisory control method and apparatus for micropump |
| 07/31/1991 | EP0438932A1 Hydromechanical device for fluid flow distribution |
| 07/30/1991 | US5035584 Variable-delivery vane-type rotary compressor |
| 07/30/1991 | US5035582 Electro-pneumatic governor for a compressed air-system |
| 07/30/1991 | US5035581 Fluid level monitoring and control system |
| 07/30/1991 | US5035580 Bypass mode control for high pressure washing system |
| 07/25/1991 | WO1991010934A1 Peristaltic pump monitoring device and method |
| 07/24/1991 | EP0437617A1 Method of and device for controlling induction motor for compressor |
| 07/18/1991 | DE4101210A1 Control arrangement for vane cell pump - incorporates adjustable opening in control piston |
| 07/16/1991 | US5032065 Radial piston pump |
| 07/16/1991 | US5032063 Precision fluid pump |
| 07/16/1991 | US5032061 Hydraulic pumps |
| 07/16/1991 | US5032060 Continuously variable capacity swash plate type refrigerant compressor |
| 07/16/1991 | US5032058 Calibrated fluid injection system |
| 07/16/1991 | CA1286148C Hydraulic gain reduction circuit |
| 07/12/1991 | WO1991010946A1 Peristaltic pump motor drive |
| 07/10/1991 | EP0436512A2 Valveless positive displacement pump |
| 07/10/1991 | CN1013142B Controlling valve of compressor |
| 07/04/1991 | DE4000016A1 Stepless controllable piston vacuum pump - involves eccentrically mounted worm drive mechanism |
| 07/02/1991 | US5028212 Method and apparatus for removal of floating immiscible liquids |
| 06/27/1991 | CA2029167A1 Method and apparatus for supplying compressed air to auxiliary systems of a vehicle |
| 06/26/1991 | EP0434478A1 Device for the compression and storage of air |
| 06/26/1991 | EP0434259A1 Electronic control of fluid flow rate |
| 06/25/1991 | USRE33620 Continuously variable capacity refrigeration system |
| 06/25/1991 | US5026316 Variable capacity wobble plate compressor |
| 06/25/1991 | US5026258 High-volume auxiliary-overload-bypass valve |
| 06/25/1991 | US5026257 Variable displacement vane-type rotary compressor |
| 06/25/1991 | US5025830 Valve unloader finger assembly, a method of forming the same, a kit, and a plate therefor |
| 06/25/1991 | CA1285194C Pressure flow compensating control circuit |
| 06/19/1991 | EP0432934A1 Variable displacement high pressure pump with internal power limiting arrangement |
| 06/19/1991 | CA2030982A1 Air compressing and accumulating device |
| 06/18/1991 | US5024584 Pump unit with adjustable piston stroke length |
| 06/18/1991 | US5024347 Adjustably controllable accuracy-enhancing pump arrangement and method |
| 06/12/1991 | EP0432085A2 Protection for electrically driven device |
| 06/12/1991 | EP0431460A1 Vacuum pump control apparatus for an evacuating type waste water collecting system |
| 06/12/1991 | EP0431287A1 Process for optimised operation of two or more compressors in parallel or series operation |
| 06/12/1991 | CN1052177A Low pressure recirculation valve |
| 06/12/1991 | CN1012835B Monitor-type dynamic hydraulic oil lubricator |
| 06/11/1991 | US5022832 Ring valve type air compressor |
| 06/11/1991 | US5022826 Variable capacity type swash plate compressor |
| 06/05/1991 | CN2078398U No load protection stop valve for air-balanced oil suction device |
| 06/04/1991 | US5020980 Valveless, positive displacement pump including hinge for angular adjustment |
| 06/04/1991 | US5020976 Variale capacity vane compressor |
| 06/04/1991 | US5020975 Variable-delivery vane-type rotary compressor |
| 06/04/1991 | US5020972 Method and apparatus for preventing the no-load operation of a pump for a liquid supply system |
| 06/04/1991 | US5020826 Vehicle suspension system |
| 06/04/1991 | US5020324 Charge flow priority circuit |
| 06/04/1991 | CA1284599C2 High pressure flow through diaphragm pump |
| 05/31/1991 | CA2030318A1 Variable displacement high pressure pump with internal power limiting arrangement |
| 05/29/1991 | EP0429125A2 Circuit for controlling a free-piston engine, in particular of a refrigerator compressor |