| 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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| 05/03/1994 | CA1329184C Common compression zone access ports for positive displacement compressor |
| 05/03/1994 | CA1329182C Scroll compressor with anti-fluttering valves for the variable displacement mechanism |
| 05/03/1994 | CA1329153C Above-ground storage system |
| 04/28/1994 | WO1994009275A1 Process for operating a dry-compression vacuum pump |
| 04/28/1994 | DE4327602C1 High pressure pump set - comprises high pressure pump, IC engine with fuel injection and speed governor |
| 04/27/1994 | EP0594137A2 Hydraulic power steering apparatus |
| 04/27/1994 | EP0540542B1 Relief valve for a high-pressure pump |
| 04/27/1994 | EP0455659B1 High-pressure cleaning appliance |
| 04/26/1994 | US5307288 Unitary fluid flow production and control system |
| 04/26/1994 | US5305789 Hydraulic directional control valve combining pressure compensation and maximum pressure selection for controlling a feed pump, and multiple hydraulic control apparatus including a plurality of such valves |
| 04/21/1994 | DE4244516C1 Start-up monitoring apparatus for hydraulically driven machine - has time control component connected to electrical pressure switch, magnet-valve and disconnecting switch of motor. |
| 04/21/1994 | DE4234750A1 Delivery pump for vehicle braking system - uses throttle responsive to opening pressure of by=pass valve which can overcome pre-set evacuation negative pressure at pump outlet |
| 04/20/1994 | EP0593225A1 Method and apparatus for controlling a system of compressors to achieve load sharing |
| 04/20/1994 | CN1085632A Digital-control supercritical beam-pumping unit |
| 04/19/1994 | US5303559 Method and apparatus for refrigerant recovery |
| 04/14/1994 | WO1994007717A1 Process and circuit arrangement for regulating the flow rate of an hydraulic pump |
| 04/14/1994 | DE4234169A1 Verfahren zum Betrieb einer trockenverdichteten Vakuumpumpe sowie für dieses Betriebsverfahren geeignete Vakuumpumpe Method for operating a dry compressed vacuum pump and suitable for this method of operation vacuum pump |
| 04/13/1994 | CN2161752Y Circulating timing control box of oil pumping unit for oil field |
| 04/13/1994 | CN1085292A Mast-type numerically-controlled oil pumping unit |
| 04/12/1994 | US5302011 Braking pressure control device for a hydraulic automotive vehicle brake system |
| 04/06/1994 | CN2160774Y Safety protection monitoring alarm for air-compressor |
| 04/06/1994 | CN2160773Y Automatic overspeed controller for pneumatic pump |
| 04/05/1994 | US5299918 Bearing for compressor drive shaft |
| 03/31/1994 | WO1994006997A1 Submersible well probe sleeve |
| 03/31/1994 | DE4332446A1 Fuel pressure regulator having two chambers sepd. by flexible diaphragm |
| 03/31/1994 | DE4232130A1 Verfahren und Schaltungsanordnung zur Regelung der Förderleistung einer Hydraulikpumpe Method and circuit for controlling the flow rate of a hydraulic pump |
| 03/30/1994 | EP0589667A1 Valved discharge mechanism of a refrigerant compressor |
| 03/30/1994 | EP0589505A1 Pump control system |
| 03/30/1994 | CN2160026Y Alarm timer for oil pump stop |
| 03/29/1994 | US5297941 Control systems for hydraulic pumps of the variable displacement type |
| 03/22/1994 | US5296145 Apparatus and method for supercritical fluid extraction |
| 03/22/1994 | US5295812 Electromagnetic clutch and pulley bearing arrangement |
| 03/22/1994 | US5295807 Variable output pump adjustment mechanism |
| 03/22/1994 | US5295790 Flow-controlled sampling pump apparatus |
| 03/22/1994 | US5295353 Controlling arrangement for travelling work vehicle |
| 03/22/1994 | CA1328005C Cooling fan controlling apparatus for vehicle with air conditioner |
| 03/17/1994 | WO1994006068A1 Air sampling pump system |
| 03/17/1994 | WO1994005355A1 Systems and methods for communicating with ambulatory medical devices such as drug delivery devices |
| 03/16/1994 | CN1024035C Numerically-controlled compressor with variable operation conditions |
| 03/09/1994 | EP0448592B1 Fluid flow control apparatus |
| 03/09/1994 | CN2158457Y Device for controling phase of air compressor |
| 03/08/1994 | US5292234 System for preventing cavitation in an hydraulic pump |
| 03/08/1994 | US5292232 Liquid pump pressure control system |
| 03/08/1994 | US5291777 System for monitoring oil well performance |
| 03/08/1994 | CA1327498C Medical pump with infusion controlled by a detachable coded label |
| 03/03/1994 | DE4328382A1 Pressure-cleaning equipment - has by=pass pipe stop valve coupled directly by Bowden cable to governor increasing engine speed when valve shuts |
| 03/03/1994 | DE4229297A1 Positive-displacement pump - has pressure limitation valve with discharge side opening into discharge channel directed towards regulator piston |
| 03/03/1994 | DE4228357A1 Radial piston pump - has pressure oil intake channel, adjusted by externally accessible throttle which is formed as adjusting screw and adjusted by rotary slide |
| 03/01/1994 | US5290159 Downhole pump of constant differential hydraulic pressure |
| 03/01/1994 | US5290142 Method of monitoring a pumping limit of a multistage turbocompressor with intermediate cooling |
| 02/23/1994 | EP0583779A1 Pressure compensation device for high-pressure liquid pump |
| 02/22/1994 | US5287875 Draining pump system and drainage preference operating method therefor |
| 02/22/1994 | CA2014653C Control apparatus used for a refrigerant circuit having a compressor with a variable displacement mechanism |
| 02/16/1994 | EP0582625A1 Process and device for the controlled metering of at least one pourable component. |
| 02/15/1994 | US5287086 Proximity detection system and oscillator |
| 02/15/1994 | US5286172 Slant plate type compressor with variable capacity control mechanism |
| 02/15/1994 | US5285642 Load sensing control system for hydraulic machine |
| 02/15/1994 | US5285641 Flow dividing pump |
| 02/08/1994 | US5284423 Computer controlled positive displacement pump for physiological flow simulation |
| 02/08/1994 | US5284180 Controlling vacuum level with a two-level vacuum system controller and adjustable speed drive |
| 02/08/1994 | CA2073592C Power limiter control for variable displacement axial piston pump |
| 02/03/1994 | DE4224973A1 Oil supply pressure control - uses multistage valve with oil filter acting as resistance and throttle |
| 02/01/1994 | US5282723 Refrigeration compressor with electronic control arrangement |
| 02/01/1994 | US5282722 Electronic pressure control |
| 01/26/1994 | EP0580558A1 Device for the control of elevating pumps in a drainage installation or similar |
| 01/25/1994 | US5281101 Water supply system and method of operation thereof |
| 01/25/1994 | US5281100 Well pump control system |
| 01/25/1994 | US5281014 Electrohydraulic control apparatus for anti-lock brake system |
| 01/25/1994 | US5280745 Radial-pluger-type apparatus with variable plunger stroke |
| 01/25/1994 | CA1326475C Slant plate type compressor with variable displacement mechanism |
| 01/19/1994 | EP0579117A1 Variable displacement hydrostatic device and neutral return mechanism therefor |
| 01/18/1994 | US5279206 Variable displacement hydrostatic device and neutral return mechanism therefor |
| 01/17/1994 | CA2074013A1 Brake assembly for rotating rod |
| 01/13/1994 | DE4222867A1 Industrial water conduction system - has at least one conveying pump driven by controller |
| 01/12/1994 | EP0578338A2 Calibrating plural pump fluid flow system |
| 01/12/1994 | CN1080694A Energy-saving power device for sliding beam oil pump |
| 01/12/1994 | CN1080693A Sliding beam type oil pump numerical controlled power device |
| 01/11/1994 | US5277553 Valve-controlled displacer unit having valve triggering |
| 01/11/1994 | US5277545 Vapor emission control |
| 01/11/1994 | US5277156 Common-rail fuel injection system for an engine |
| 01/11/1994 | CA1325984C Lubricant delivery system including flow measuring |
| 01/06/1994 | WO1994000691A1 Radial piston pump |
| 01/06/1994 | WO1994000690A1 High-pressure cleaning device |
| 01/05/1994 | DE4221192A1 Hochdruckreinigungsgerät High pressure cleaning equipment |
| 12/29/1993 | EP0576238A1 Load sharing method and apparatus for controlling a main gas parameter of a compressor station with multiple dynamic compressors |
| 12/29/1993 | EP0575880A1 A reciprocating piston volumetric compressor, particularly for pneumatic braking systems |
| 12/29/1993 | CN2151278Y Oil sucker controller |
| 12/28/1993 | CA1325578C Variable elasticity elastic battery propulsion engine; the vehicle thus equipped |
| 12/23/1993 | WO1993025816A1 Programmable infusion pump with interchangeable tubing |
| 12/23/1993 | CA2137772A1 Programmable infusion pump with interchangeable tubing |
| 12/23/1993 | CA2098941A1 Load sharing method and apparatus for controlling a main gas parameter compressor station with multiple dynamic compressors |
| 12/22/1993 | EP0574623A1 Power transmission |
| 12/22/1993 | CN1023245C Scroll type compressor |
| 12/22/1993 | CN1023244C Scroll-type compressor |
| 12/21/1993 | US5271722 Automotive control system for hydrostatic pumps |
| 12/18/1993 | CA2071411A1 Power transmission |
| 12/16/1993 | DE4319495A1 Hydraulic steering servo, for vehicle, with variable reaction force - has flow control by=pass channel to regulate flow-rate and control reaction force to steering. |
| 12/16/1993 | DE4319097A1 Adjustable displacement swashplate compressor - uses magnetic displacement detector with detector wires placed along path traversed by magnet |
| 12/16/1993 | DE4209679A1 Pump for thick fluids like mud - has piston in cylinder with inlet and outlet valves plus computer to determine volume flow exactly |
| 12/15/1993 | EP0573734A1 Method for controlling hydraulic pump driven by engine |