| 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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| 06/20/1990 | EP0374117A2 Spray apparatus |
| 06/20/1990 | EP0373975A1 Pumping unit for obstaining a high vacuum |
| 06/20/1990 | EP0373809A2 Ultrasonicc bilge pump control device |
| 06/20/1990 | EP0373269A1 Scroll type compressor with variable displacement mechanism |
| 06/19/1990 | US4934903 Oil discharge detecting device for marine engine |
| 06/19/1990 | US4934143 Electrohydraulic fluid control system for variable displacement pump |
| 06/13/1990 | EP0372913A1 Wobble plate compressor |
| 06/13/1990 | EP0372154A1 Input power saving device for piston compressors, especially for the compressed-air installation of a motor vehicle |
| 06/13/1990 | EP0372081A1 Hydraulic control unit of hydraulic excavators |
| 06/13/1990 | DE3909531A1 Device for saving power in piston compressors, in particular for compressed-air generation in motor vehicles |
| 06/13/1990 | CN1008388B Fluid operated pump displacement control system |
| 06/13/1990 | CA2005465A1 Fluid flow control apparatus |
| 06/12/1990 | US4932844 Control section for a control system for controlling the internal volume of a rotary compressor |
| 06/12/1990 | US4932841 Combination oil pressure regulator and low oil pressure detector for refrigerant compressor |
| 06/12/1990 | US4932840 Control apparatus of variable delivery pump |
| 06/12/1990 | US4932631 Apparatus to transmit drive force between two components |
| 06/12/1990 | US4932220 Air conditioner system with optimum high pressure control function |
| 06/06/1990 | EP0371407A2 Ring valve type air compressor |
| 06/06/1990 | EP0371396A2 Air compressor unloading system |
| 06/06/1990 | CN1042756A Electronic-controlled double-direction magnetic driving reciprocating pump |
| 06/06/1990 | CN1042659A Medical pump with infusion controlled by detachable coded label |
| 06/05/1990 | US4930992 Control apparatus of variable delivery pump |
| 06/05/1990 | US4930320 Cooling fan controlling apparatus for vehicle with air conditioner |
| 05/29/1990 | US4929156 Variable capacity compressor |
| 05/29/1990 | US4928723 Capacity control valve for a compressor |
| 05/29/1990 | US4928500 Control device for freezer |
| 05/22/1990 | US4927411 Drive mechanism for disposable fluid infusion pumping cassette |
| 05/22/1990 | US4927335 Pump for transferring liquids, in particular beer or carbonated beverages |
| 05/22/1990 | US4926942 Method for reducing sand production in submersible-pump wells |
| 05/17/1990 | WO1990002878A3 Electronically controlled cryopump |
| 05/15/1990 | US4925371 Flow rate control for a variable stroke pump |
| 05/15/1990 | US4925370 Electric motor driven pump with an automatic transmission |
| 05/10/1990 | DE3837599A1 Gear pump having two pairs of gear wheels arranged next to one another in the pump casing |
| 05/09/1990 | EP0367476A1 Variable displacement pumps |
| 05/09/1990 | CN2056945U Level-signaling apparauts on water isolating pump |
| 05/02/1990 | EP0366464A2 Compressed air dispensing machine |
| 05/02/1990 | CA2001780A1 Variable displacement pumps |
| 05/01/1990 | US4920859 Radial piston pump and motor |
| 05/01/1990 | US4920748 Hydraulic drive system |
| 05/01/1990 | CA1268394A1 Summing pressure compensation control |
| 04/28/1990 | CA2001699A1 Compressed air dispensing machine |
| 04/25/1990 | CN1041636A Protective device for oil pumping machine |
| 04/24/1990 | US4919595 Fluid delivery system with deficit flow compensation |
| 04/24/1990 | US4919343 Anti-flooding sewage grinder pump liquid level control system in separately mounted canister |
| 04/24/1990 | US4918930 Electronically controlled cryopump |
| 04/19/1990 | WO1990003750A1 Body support system |
| 04/18/1990 | EP0364010A2 Infusion parameter control for a medical pump |
| 04/18/1990 | CN1041421A Monitor-type dynamic hydraulic oil lubricator |
| 04/17/1990 | US4918585 Maintenance reminder system for a pump |
| 04/17/1990 | US4917578 Variable capacity compressor |
| 04/11/1990 | CN1007543B Power transmission system |
| 04/10/1990 | US4915126 Method and arrangement for changing the pressure in pneumatic or hydraulic systems |
| 04/05/1990 | WO1990003519A1 Pump control method and poppet valve therefor |
| 04/04/1990 | EP0361927A1 Pump control method and poppet valve therefor |
| 04/03/1990 | US4913625 Automatic pump protection system |
| 04/03/1990 | US4913624 Low pulsation displacement pump |
| 04/03/1990 | US4913089 Pump for a viscous slurry |
| 04/03/1990 | CA1267395A1 Rotary compressor relief valve |
| 03/29/1990 | DE3930248A1 Radial piston pump with cylinders in parallel planes - incorporates differently positioned different-sized inlet bores |
| 03/28/1990 | CN2055194U Hydraulic variable flow valve |
| 03/27/1990 | US4911617 Air pressure circuit |
| 03/27/1990 | US4911615 Hydraulic pump unloader |
| 03/27/1990 | US4911405 Valve unit |
| 03/22/1990 | WO1990002878A2 Electronically controlled cryopump |
| 03/22/1990 | WO1990002876A1 Radial piston pump |
| 03/22/1990 | DE3930542A1 Radial piston pump for engine cooling system - uses electromagnet to operate flow control valve |
| 03/21/1990 | EP0359695A2 Automatic control for variable displacement pump |
| 03/21/1990 | EP0358743A1 Brake system. |
| 03/14/1990 | CN1040417A 旋转压缩机 Rotary compressor |
| 03/08/1990 | WO1990002264A1 Above-ground storage system |
| 03/07/1990 | EP0356702A2 Arrangement for monitoring the output flow of a dosing pump |
| 03/06/1990 | US4905477 Refrigerant circuit with passageway control mechanism |
| 02/28/1990 | EP0355260A2 Screw type vacuum pump |
| 02/28/1990 | EP0355249A2 Terminal element for simulator and controller |
| 02/27/1990 | US4904164 Scroll type compressor with variable displacement mechanism |
| 02/27/1990 | US4904162 Fuel supplying pump |
| 02/27/1990 | US4904161 Apparatus for controlling hydrualic pump |
| 02/27/1990 | US4903579 Pressure-release valve and conduit for preventing damage to seal of hydraulic power drive unit |
| 02/21/1990 | CN1039880A Controlling valve of compressor |
| 02/21/1990 | CN1006926B Compressor with rotation detecting device |
| 02/20/1990 | US4902202 Variable discharge gear pump with energy recovery |
| 02/20/1990 | US4901837 Clutch driven compressor assembly |
| 02/20/1990 | CA1265955A1 Pumping systems |
| 02/14/1990 | EP0354867A2 Scroll type compressor |
| 02/07/1990 | EP0353520A2 Method of and apparatus for detecting shaft position of compressor for air conditioner, and control apparatus for stopping air compressor by using shaft position detecting apparatus |
| 02/07/1990 | CN1039468A Slant plate type compressor with variable displacement mechanism |
| 02/06/1990 | US4898129 Valve control of internal combustion engines by means of a cam-driven rotary piston pump |
| 02/06/1990 | US4897996 Low-loss cyclically-operating pressure-responsive bypass valve for fixed displacement pump flow control |
| 02/05/1990 | EP0246227A4 Cyclic speed control apparatus in variable stroke machines. |
| 01/31/1990 | CN1039286A Slant plate type compressor with variable displacement mechanism |
| 01/30/1990 | US4897022 Multi-tank/multi-pump water pressure booster system |
| 01/25/1990 | DE3824752A1 Swash plate compressor |
| 01/25/1990 | DE3824293A1 Method for adjusting desired values in regulated pump systems |
| 01/23/1990 | US4894999 Automatic air conditioning system with variable displacement compressor, for automotive vehicles |
| 01/18/1990 | DE3919407A1 Verfahren zum steuern eines verdichters und steuerungseinrichtung A method for controlling a com- pressor and control device |
| 01/17/1990 | CN1038858A Method and apparatus for controlling pumps in drainage system |
| 01/10/1990 | EP0350426A2 Common compression zone access ports for positive displacement compressor |
| 01/10/1990 | EP0181865B1 Hydrostatic vehicle control |
| 01/09/1990 | US4892465 Automatic control for variable displacement pump |
| 01/04/1990 | DE3821844A1 Hydrostatische verdraengermaschine (pumpe oder motor) Hydrostatic displacement (pump or motor) |