| 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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| 03/10/1992 | US5094592 Variable capacity vane compressor having a seal protective structure |
| 03/10/1992 | CA1296912C Refrigerant circuit with passageway control mechanism |
| 03/05/1992 | DE4027920A1 High pressure aggregate for water delivery systems - makes use a membrane and seals between two cover plates |
| 03/03/1992 | US5093864 Silencer |
| 03/03/1992 | US5092750 Device for the compression and storage of air |
| 02/27/1992 | DE4026684A1 Power economy device for piston compressor - involves suction valve with control pressure switchable between work and no-load positions |
| 02/26/1992 | EP0471930A1 Method for real time compensation of fluid compressibility in high pressure reciprocating pumps |
| 02/26/1992 | EP0471842A1 Variable capacity pump controller of hydraulically driven wheel |
| 02/26/1992 | CN1059019A Valve unloader finger assembly, method of forming same, kit and plate therefor |
| 02/25/1992 | US5090880 Scroll compressor with discharge valves |
| 02/25/1992 | US5090872 Method of controlling the operation of a pump in a pumping installation by detecting counterflow |
| 02/25/1992 | US5090871 Junction assembly with leak detection means |
| 02/25/1992 | US5090437 Low friction proportional unloading valve |
| 02/25/1992 | CA1296194C Refrigeration system |
| 02/19/1992 | EP0471579A1 Valve unloader finger assembly, a method of forming the same, a kit and a plate therefor |
| 02/19/1992 | EP0471166A1 Control apparatus for regulating the delivery flow rate setting of several hydrostatic adjustable pumps |
| 02/19/1992 | EP0471098A1 Hydraulic piston apparatus |
| 02/17/1992 | CA2049254A1 Valve unloader finger assembly, a method of forming the same, a kit therefor, and a plate therefor |
| 02/12/1992 | EP0470342A1 Membrane pump |
| 02/11/1992 | US5086975 Pressure washer with spring-less outlet to inlet bypass |
| 02/06/1992 | WO1992001868A1 Relief valve for a high-pressure pump |
| 02/06/1992 | DE4115169A1 Variable stroke piston pump - has mechanism to vary pump stroke when pump is operating |
| 02/06/1992 | DE4024487A1 Pressure regulator for vehicle brakes compressed air supply - has operating piston with sealing membrane between insert body and regulator housing |
| 02/04/1992 | CA1295306C Valve assembly and compressor modulation apparatus |
| 01/29/1992 | EP0468834A1 Hydraulic alternating piston pump |
| 01/29/1992 | EP0468833A1 Hydraulic reciprocating piston pump |
| 01/28/1992 | US5083590 Three-way valve |
| 01/23/1992 | DE4123689A1 Throttle control for vane cell pump - uses bush and sleeve to vary flow curve via throttling |
| 01/23/1992 | DE4023039A1 Stroke ring adjustment for hydrostatic pump - has circuit for providing position signals from delivery pipe |
| 01/21/1992 | US5081907 Hydrostatic displacement engine |
| 01/15/1992 | EP0466291A2 Apparatus and method for supercritical fluid extraction |
| 01/15/1992 | EP0465474A1 Control arrangement for a two-cylinder pump for thick materials. |
| 01/14/1992 | US5080563 Fuel pumping apparatus |
| 01/14/1992 | US5079924 Circuit for controlling a free-piston engine in particular of a refrigerator compressor |
| 01/09/1992 | DE4020325A1 Swashplate hydraulic pump assembly - has control system which reduces pump flow as delivery pressure increases |
| 01/08/1992 | EP0464571A1 Device for the safe managing of a vacuum pump |
| 01/08/1992 | EP0464301A1 Phase adjustable metering pump, and method of adjusting the flow rate thereof |
| 01/08/1992 | CN1057706A Valve for hermetic refrigeration compressor |
| 01/07/1992 | US5078577 Automatic bilge pumping and alarm unit |
| 01/07/1992 | US5077975 Control for a load-dependently operating variable displacement pump |
| 01/07/1992 | US5077974 Constant power displacement control cutoff system with adjustable relief valve |
| 01/03/1992 | WO1992000456A1 Reversible variable displacement hydraulic device |
| 01/03/1992 | CA2063703A1 Reversible variable displacement hydraulic device |
| 12/31/1991 | US5076057 Hydromechanical continuously variable transmission employing plunger-type hydraulic unit |
| 12/30/1991 | WO1992000455A1 Radial piston fluid machine and/or adjustable rotor |
| 12/27/1991 | EP0462589A2 Control system for load sensing hydraulic drive circuit |
| 12/24/1991 | US5074763 Telescopic moving equipment for driving a reciprocating pump |
| 12/24/1991 | US5074761 Rotary compressor |
| 12/24/1991 | US5074760 Scroll type compressor |
| 12/24/1991 | US5074756 Infusion device with disposable elements |
| 12/24/1991 | US5074746 Constant speed vertical pump with aeration |
| 12/19/1991 | DE4018972A1 Infinitely variable pump system - can supply several hydraulic users and is regulated by varying load pressures |
| 12/18/1991 | EP0461943A2 Compression device, especially for filling a tank under pressure |
| 12/18/1991 | EP0461331A1 Three way valve |
| 12/18/1991 | EP0262182B1 Pressure-measurement flow control system |
| 12/17/1991 | US5073091 Variable displacement rotary hydraulic machine |
| 12/12/1991 | WO1991019100A1 Device for and method of controlling vehicle for loading work |
| 12/12/1991 | DE4018700A1 Output regulator for hydraulically controlled pump - uses second independent hydraulic circuit to produce counteracting control pressure |
| 12/10/1991 | US5071326 Double piston portioning apparatus |
| 12/10/1991 | US5070695 Hydrostatic drive system |
| 12/04/1991 | EP0459434A2 Hydropneumatic constant pressure device for automatic control of the operation and stopping of electrical motorpumps |
| 12/04/1991 | EP0407436B1 Motor propulsion, in particular for an automobile vehicle and vehicle comprising such a unit |
| 12/04/1991 | CN1015021B Contant-flow adjustment system and method for volume-type hydraulic pump with electric leakage compensation |
| 11/28/1991 | WO1991017912A1 Device for dampening vibrations in hydraulic systems |
| 11/26/1991 | US5067654 Pressure washer |
| 11/21/1991 | EP0457365A2 Apparatus for controlling hydraulic pump |
| 11/19/1991 | US5066201 Driving load controller for variable displacement type hydraulic pump |
| 11/19/1991 | US5066200 Double containment pumping system for pumping hazardous materials |
| 11/19/1991 | US5065589 Control apparatus used for a refrigerant circuit having a compressor with a variable displacement mechanism |
| 11/14/1991 | DE4114847A1 Hydrostatic displacement pump integral to closed hydraulic system - has filler pump which tops up pressure medium lost through leakage |
| 11/13/1991 | EP0455659A1 High-pressure cleaning appliance. |
| 11/12/1991 | US5064352 Slant plate type compressor with variable dispalcement mechanism |
| 11/12/1991 | US5064351 Variable displacement pumps |
| 11/12/1991 | US5064350 Pump station |
| 11/12/1991 | US5064349 Method of monitoring and controlling a pumped well |
| 11/12/1991 | US5064348 Determination of well pumping system downtime |
| 11/12/1991 | US5064347 Pressure responsive fluid pump shut off and alarm system |
| 11/06/1991 | EP0252955B1 Pressure regulator with integrated pick-off |
| 11/05/1991 | US5062278 Air-conditioning apparatus including an indoor unit and an outdoor unit having its compressor driven by a three-phase AC power supply |
| 10/29/1991 | US5061156 Bellows-type dispensing pump |
| 10/23/1991 | CN1055584A Numerically-controlled compressor with variable operation conditions |
| 10/22/1991 | US5058553 Variable-discharge high pressure pump |
| 10/16/1991 | CN1014346B Rotary compressor |
| 10/16/1991 | CN1014343B Slant plate type compressor with variable displacement mechanism |
| 10/15/1991 | US5056990 Variable capacity vane compressor |
| 10/10/1991 | DE4010049C1 Pump unit for heating or cooling circuit - uses frequency regulator to reduce rotation of pump motor upon detected overheating |
| 10/09/1991 | EP0450586A1 Rotary type fluid energy converter |
| 10/09/1991 | EP0344311B1 Hydraulic apparatus for construction machines |
| 10/08/1991 | US5056036 Computer controlled metering pump |
| 10/08/1991 | US5055001 Volumetric pump with spring-biased cracking valves |
| 10/08/1991 | US5054995 Apparatus for controlling a fluid compression system |
| 10/08/1991 | US5054293 Apparatus and method for protecting a compressor in a heat pump |
| 10/02/1991 | EP0449686A1 Telescopic mobile equipment for driving a reciprocating pump |
| 10/02/1991 | EP0449153A2 Pump unit |
| 10/02/1991 | EP0448592A1 Fluid flow control apparatus. |
| 10/02/1991 | EP0246227B1 Cyclic speed control apparatus in variable stroke machines |
| 10/02/1991 | CN1014167B Power transmission |
| 10/02/1991 | CN1014132B Portable air pump for automative vehicle |
| 10/01/1991 | US5052901 Lift valve in a rotary screw machine |
| 10/01/1991 | US5052900 Pressure relief valve for positive pressure pumps |