| 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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| 07/25/1989 | US4850806 Controlled by-pass for a booster pump |
| 07/25/1989 | US4850805 Pump control system |
| 07/25/1989 | US4850513 Control system and method for high production plaster pump |
| 07/19/1989 | CN2041372U Fully-automatic microelectronic controlled compressor |
| 07/18/1989 | US4848790 Hydraulic pressure supply system variable of pressure supply rate depending upon driving condition of automotive vehicle |
| 07/11/1989 | US4846633 Variable-capacity scroll-type compressor |
| 07/11/1989 | US4846632 Variable displacement vane compressor |
| 07/11/1989 | US4845950 Rotation angle dependent correction of speed control signal in low-speed constant torque control hydraulic drive |
| 07/06/1989 | DE3840428A1 Radial-piston pump |
| 07/05/1989 | EP0323301A1 Timing device for a volumetric engine and compressor |
| 07/04/1989 | US4844703 Air conditioning system for a vehicle |
| 07/04/1989 | US4844702 Lubrication circuit of rotary vacuum pumps |
| 07/04/1989 | US4843834 Device for controlling capacity of variable capacity compressor |
| 06/27/1989 | US4843575 Interactive dynamic real-time management system |
| 06/27/1989 | US4842490 Variable displacement vane compressor |
| 06/27/1989 | US4841737 Method for controlling a displacement changing mechanism of a variable displacement refrigerant compressor for a car air-conditioner |
| 06/27/1989 | US4841736 Method for controlling the operation of a variable displacement refrigerant compressor for a car air-conditioner |
| 06/22/1989 | DE3740672A1 Device for delivery rate control of a valve-controlled multipiston pump |
| 06/21/1989 | EP0321376A2 Apparatus for controlling start up and stop down of a hydraulic pump |
| 06/21/1989 | EP0321339A1 Flow rate regulating system for an alternating dosing pump |
| 06/21/1989 | EP0321295A2 Automatic pump protection system |
| 06/20/1989 | US4840545 Scroll compressor relief valve |
| 06/15/1989 | WO1989005405A1 Oil hydraulic pump |
| 06/13/1989 | US4839136 Spacer for nuclear fuel rods |
| 06/13/1989 | US4838768 Convertible pump system |
| 06/13/1989 | US4838740 Variable displacement vane compressor |
| 06/07/1989 | EP0319093A1 Pump unit |
| 06/06/1989 | US4836340 Anti-backlash device for a pump shaft |
| 05/31/1989 | EP0317705A1 Device for the controlled dosage and infusion of liquids from a reservoir into the body |
| 05/30/1989 | US4834618 Oil feeding systems |
| 05/23/1989 | US4832579 Plural hydraulic pump system with automatic displacement control and pressure relief valve |
| 05/23/1989 | US4832575 Automatic test system for check valve closure in pump for liquid chromatography system |
| 05/17/1989 | EP0316164A1 A variable flow rate pump for fluid |
| 05/16/1989 | US4830589 Variable stroke positive displacement pump |
| 05/10/1989 | EP0315264A1 Pump for transferring liquids, in particular beer or carbonated beverages |
| 05/10/1989 | EP0314994A1 Pump arrangement with double pump |
| 05/10/1989 | CN2037402U Multi-functional valve switch |
| 05/09/1989 | US4828462 Pressure detecting system for a hydraulic device |
| 05/03/1989 | EP0314665A1 Plate-type valve for a compressor |
| 05/02/1989 | CA1253593A1 Oil detecting switch for controlling a pump |
| 04/25/1989 | US4824331 Variable discharge gear pump with energy recovery |
| 04/25/1989 | US4824330 Use with automobile air conditioning systems |
| 04/25/1989 | US4823552 Failsafe electrohydraulic control system for variable displacement pump |
| 04/20/1989 | WO1989003482A1 Rotary displacement compressor |
| 04/18/1989 | US4822260 Device for controlling fluid supply to a rotary piston machine |
| 04/18/1989 | US4821527 Cooling device equipped with a variable displacement type compressor |
| 04/18/1989 | US4821514 Pressure flow compensating control circuit |
| 04/13/1989 | DE3733396A1 Electric closed-loop control of a pump for regulation of the delivery rate and pressure at a consumer |
| 04/13/1989 | DE3732323A1 Safety valve for the protection of air pumps against the backflow of water, other liquids and air backpressure |
| 04/11/1989 | US4820129 Pressure measurement in fluid pump systems |
| 04/05/1989 | EP0309596A1 Pumping apparatus for delivering liquid at high pressure |
| 04/04/1989 | US4819123 Compressed air supply system |
| 04/04/1989 | US4818189 Variable capacity vane compressor |
| 03/29/1989 | EP0308846A1 Method for starting vacuum pumps connected in series, and device for carrying out the method |
| 03/28/1989 | US4816019 Infiltration detection system using pressure measurement |
| 03/28/1989 | US4815950 Multi-stage compressor capacity control apparatus |
| 03/28/1989 | US4815945 Variable capacity vane compressor |
| 03/28/1989 | US4815944 Variable capacity compressor |
| 03/28/1989 | US4815943 Variable displacement wobble plate compressor with capacity control valve |
| 03/28/1989 | US4815941 Automatic water delivery system |
| 03/28/1989 | US4815300 Air conditioner system for automobiles |
| 03/22/1989 | EP0307637A1 Valve control for an internal-combustion engine by means of an offset-driven rotary-piston pump |
| 03/21/1989 | US4813854 Variable capacity vane compressor |
| 03/21/1989 | US4813235 Hydraulic gain reduction circuit |
| 03/21/1989 | CA1251353A1 Control circuit and control valve for radial piston pump |
| 03/15/1989 | EP0221062B1 Regulation device for a positive displacement pump, particularly a vane-type pump |
| 03/15/1989 | CN1031745A Compressor with rotation detecting device |
| 03/14/1989 | US4811624 Hydraulically actuated stroke adjusting device |
| 03/09/1989 | DE3728207A1 Valve arrangement for two load-regulated pumps driven by a common drive |
| 03/08/1989 | CN1031582A Valve gear for internal combustion machine driven by eccentric rotary piston pump |
| 03/07/1989 | US4810943 Method and apparatus for controlling air-conditioning apparatus |
| 03/07/1989 | US4810171 Regulator for an adjustable hydrostatic machine |
| 03/07/1989 | US4809504 Control system for controlling input power to variable displacement hydraulic pumps of a hydraulic system |
| 02/28/1989 | US4808161 Pressure-measurement flow control system |
| 02/28/1989 | US4808083 Variable capacity type vane compressor |
| 02/28/1989 | US4808078 Pump control system for instantly reversing the drive motor |
| 02/28/1989 | US4808077 Pulsationless duplex plunger pump and control method thereof |
| 02/23/1989 | WO1988010460A3 Fluid composition and volumetric delivery control |
| 02/21/1989 | US4806839 Device for energizing a hermetic motor using inverter |
| 02/15/1989 | EP0303469A2 Portable air pump assembly |
| 02/15/1989 | EP0303220A2 Low pulsation displacement pump |
| 02/14/1989 | US4804360 Intravenous line valve |
| 02/02/1989 | DE3724276A1 Vorrichtung zur verhinderung von leckagen an einem eine abgedichtete fluidkammer aufweisenden bauteil Device for prevention of leaks in a sealed fluid chamber having a component |
| 02/01/1989 | EP0301886A2 Variable discharge gear pump with energy recovery |
| 02/01/1989 | EP0301312A2 Variable capacity vane compressor |
| 01/31/1989 | US4801251 Sliding-vane rotary compressor |
| 01/31/1989 | US4801247 Variable displacement piston pump |
| 01/31/1989 | US4800730 Arrangement for influencing the speed of a compressor of a refrigerating system |
| 01/25/1989 | EP0300866A1 Hermetic motor compressor |
| 01/25/1989 | EP0179824B1 Device for stirring or pumping |
| 01/24/1989 | US4799865 Intermittent service screw compressor |
| 01/24/1989 | US4799864 Hydro-pneumatic pumpsets |
| 01/18/1989 | EP0299337A2 Fuel injection system for an internal combustion engine |
| 01/18/1989 | EP0248839B1 Intermittent service screw compressor |
| 01/17/1989 | US4798050 Control system for hydraulic tandem pump in motor vehicle |
| 01/11/1989 | CN2030662U Regulator for double-cylinder mud pump |
| 01/10/1989 | US4797834 Process for controlling a pump to account for compressibility of liquids in obtaining steady flow |
| 01/10/1989 | CA1248410A1 Power transmission |
| 01/05/1989 | DE3720567A1 Infinitely variable radial piston machine |
| 01/04/1989 | EP0297840A2 Scroll type compressor with variable displacement mechanism |