| 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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| 01/02/1990 | US4890986 Variable capacity compressor |
| 01/02/1990 | US4890983 Above-ground storage system |
| 12/27/1989 | EP0149667B1 Plural hydraulic pump system with automatic displacement control |
| 12/26/1989 | US4889088 Fluid flow control method and apparatus for a positive displacement engine or compressor |
| 12/20/1989 | CN1006174B Computer controlled metering pump |
| 12/19/1989 | US4887943 Gas compressor of variable volume |
| 12/19/1989 | US4887941 Method and apparatus for starting series-coupled vacuum pumps |
| 12/14/1989 | DE3819490A1 Pump system of a hydraulic actuator, e.g. for a motor vehicle |
| 12/13/1989 | EP0346268A1 Function control valve for a compressor |
| 12/12/1989 | US4886425 Capacity control device of scroll-type fluid compressor |
| 12/12/1989 | US4886422 Control apparatus of variable delivery pump |
| 12/06/1989 | EP0344311A1 Hydraulic apparatus for construction machines |
| 12/05/1989 | US4884545 Fuel injection system for an internal combustion engine |
| 12/05/1989 | US4884412 Compressor slugging protection device and method therefor |
| 12/05/1989 | CA1263724A1 Pure-air generator |
| 11/30/1989 | WO1989011302A1 Infusion device with disposable elements |
| 11/29/1989 | EP0343914A1 Evacuation apparatus and method |
| 11/29/1989 | EP0343581A1 Variable capacity type swash plate compressor |
| 11/28/1989 | US4884013 Motor unit for a fluid pump and method of operation |
| 11/28/1989 | US4883409 Pumping apparatus for delivering liquid at high pressure |
| 11/23/1989 | EP0342928A2 Cooling fan controlling apparatus for a vehicle with an air conditioner |
| 11/23/1989 | EP0342751A1 Radial piston hydraulic motor of variable cylinder capacity |
| 11/21/1989 | US4881873 Capacitance level sensor for a bilge pump |
| 11/16/1989 | WO1989011050A1 Single spool selector valve for simultaneous pump displacement and motor direction control in hydrostatic drive |
| 11/14/1989 | US4880359 Summation power output regulating system for at least two hydrostatic transmissions |
| 11/08/1989 | EP0341149A1 Compensation device by overflow of a proportioned quantity of liquid and its application for replenishment of a hydraulic circuit |
| 11/08/1989 | CN2047311U Automatic pressure-control pump |
| 11/08/1989 | CN1005742B Rotary fluid pressure device having free-wheeling capability |
| 11/07/1989 | US4879439 Apparatus for controlling start up and stop down of a hydraulic pump |
| 11/07/1989 | US4878818 Common compression zone access ports for positive displacement compressor |
| 11/07/1989 | US4878814 Variable capacity compressor with capacity-indicating device |
| 11/07/1989 | CA1262664A1 Method and apparatus for supplying feedwater to a forced flow boiler |
| 11/02/1989 | WO1989010489A1 Lift valve in a rotary screw machine |
| 11/02/1989 | EP0340024A1 Slant plate type compressor with variable displacement mechanism |
| 11/02/1989 | EP0339897A1 Slant plate type compressor with variable displacement mechanism |
| 11/02/1989 | DE3813286A1 Device for regulating the pressure of a pump |
| 10/31/1989 | US4877380 Control system for controlling the internal volume in a rotary compressor |
| 10/31/1989 | US4876859 Multi-type air conditioner system with starting control for parallel operated compressors therein |
| 10/26/1989 | DE3812411A1 Series pump-step arrangement with controllable useful delivery rate for mobile use |
| 10/24/1989 | CA1262483A1 Method and device for pumping a highly viscous liquid |
| 10/19/1989 | WO1989008573A3 Brake system |
| 10/18/1989 | EP0337439A2 Fixed cylinder type radial piston pump with volume control apparatus |
| 10/17/1989 | US4874294 Oil well pump control |
| 10/11/1989 | CN1036173A Portable air pump assembly and detachable safety lamp for automotive vehicle |
| 10/10/1989 | US4873635 Pump-off control |
| 10/05/1989 | WO1989009144A1 Motor propulsion, in particular for an automobile vehicle and vehicle comprising such a unit |
| 10/05/1989 | DE3909159A1 Control device for positive-displacement pumps |
| 10/04/1989 | EP0335716A1 Gas compressors |
| 10/04/1989 | EP0335278A2 Evacuation pump control for a centrifuge instrument |
| 10/04/1989 | EP0334994A1 Reciprocating type fluid delivery pump |
| 10/03/1989 | US4870819 Control device for a hydrostatic drive for at least two actuators |
| 09/28/1989 | DE3810341A1 Fluid-conveying device, in particular high-pressure cleaning device |
| 09/28/1989 | DE3807452A1 Brake system |
| 09/27/1989 | CN2045030U Auto inflator |
| 09/26/1989 | US4869652 Variable capacity compressor |
| 09/26/1989 | US4869374 Chromatographic pumping system |
| 09/26/1989 | US4869291 Compressor plate valve |
| 09/26/1989 | US4869065 Single spool selector valve for simultaneous pump displacement and motor direction control in hydrostatic drive |
| 09/26/1989 | CA1261034A1 Computer controlled diesel engine fire pump controller |
| 09/26/1989 | CA1260761A1 Metering pump |
| 09/26/1989 | CA1259972A1 Fluid compressor with rotational speed detecting device |
| 09/21/1989 | WO1989008573A2 Brake system |
| 09/21/1989 | DE3808126A1 Brake pressure control device |
| 09/21/1989 | DE3807510A1 Device for pumping against a growing counterpressure |
| 09/19/1989 | US4867651 Variable capacity vane compressor |
| 09/19/1989 | CA1259683A1 Compressor with rotation detection device |
| 09/13/1989 | EP0331830A1 Delivery system for dental treatment solution |
| 09/12/1989 | US4865528 Method and arrangement for starting an hydraulic diaphragm pump against load |
| 09/12/1989 | US4865524 Variable capacity compressor |
| 09/12/1989 | US4864832 Air conditioner system for automobiles |
| 09/12/1989 | US4864822 Control device for a hydrostatic drive for at least two actuators |
| 09/08/1989 | WO1989008190A1 Hydraulic control unit of hydraulic excavators |
| 09/07/1989 | DE3904349A1 Unit for producing hydraulic power |
| 09/05/1989 | US4863355 Air compressor having control means to select a continuous or intermittent operation mode |
| 08/31/1989 | DE3805287A1 Valve arrangement for at least one hydraulic consumer fed by a pump with variable delivery volume |
| 08/29/1989 | US4861235 Variable capacity type compressor |
| 08/29/1989 | US4861231 Liquid level sensing device |
| 08/29/1989 | US4860787 Pressure regulator with integrated sensor |
| 08/29/1989 | US4860549 Variable displacement wobble plate type compressor |
| 08/29/1989 | CA1258838A1 Cylinder head with pressure regulator valve |
| 08/23/1989 | EP0328696A1 Valve unit |
| 08/23/1989 | CN1034981A Contant-flow adjustment system and method for volume-type hydraulic pump with electric leakage compensation |
| 08/22/1989 | US4859155 Bypass valve for a displacement pump |
| 08/22/1989 | US4859154 Variable-delivery vane-type rotary compressor |
| 08/22/1989 | US4858645 Lubricant delivery system including flow measuring |
| 08/16/1989 | EP0327609A1 Fluid composition and volumetric delivery control. |
| 08/15/1989 | US4857811 Evacuation pump control for a centrifuge instrument |
| 08/15/1989 | US4856291 Air conditioning system for automotive vehicles |
| 08/15/1989 | CA1258510A1 Alternator circuit arrangement useful in liquid level control system |
| 08/09/1989 | EP0327209A2 Motor unit for a fluid pump |
| 08/03/1989 | DE3801157A1 Electronically controlled piston dosing pump |
| 08/02/1989 | EP0326376A1 Hydraulic pump unloader means |
| 08/01/1989 | US4852613 Fluidic pump control systems |
| 07/27/1989 | DE3800964A1 Pump system for operating pump installations comprising a plurality of pumps |
| 07/27/1989 | DE3800900A1 Circuit arrangement for controlling the rotational speed of a hydrostatic machine |
| 07/25/1989 | US4851703 Electro/hydraulic power pack |
| 07/25/1989 | US4850828 Plunger pump of quick pressure-rise type |
| 07/25/1989 | US4850824 Arrangement for control of the stroke length |
| 07/25/1989 | US4850815 Variable capacity vane compressor |
| 07/25/1989 | US4850814 Hydraulic gear pump |