| Patents for F04B 11 - Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation (1,551) |
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| 09/17/1991 | US5049042 Anti-return safety apparatus |
| 09/17/1991 | US5048559 Valve and apparatus using said valve |
| 09/05/1991 | DE4104033A1 Solar cell driven garden pump - has current supply controlled by storage and control electronics for operation of immersion pump |
| 09/05/1991 | DE4006470A1 High pressure reciprocating piston pump with two pistons - has system to eliminate pressure troughs in output flow, caused when alternately operating pistons reverse |
| 08/28/1991 | EP0443665A1 Pressure pump |
| 08/14/1991 | EP0441026A1 Compressor discharge gas sound attenuation |
| 08/08/1991 | DE4003101A1 High pressure aggregate for cutting by jets of water - makes use of markings on pistons detectable by sensors |
| 08/01/1991 | DE4002578A1 High pressure water pump - has three-piston pump pistons connected to pump drive |
| 07/09/1991 | US5030070 Piston pump |
| 07/04/1991 | DE3943224A1 Piston pump output flow regulation - measuring input flow volumetrically to enable derivation of output flow and corresp. control parameter |
| 06/25/1991 | US5026255 Pulseless pump apparatus having pressure crossover detector and control means |
| 06/13/1991 | DE3940730A1 Peristaltic flexible hose pump - has rotor with rollers mounted on spring-loaded levers |
| 06/12/1991 | EP0431753A1 Reciprocating pump |
| 06/11/1991 | US5022831 Positive displacement pump with rotating reciprocating piston |
| 06/04/1991 | US5020978 Apparatus and method for reducing vehicular fuel pump noise |
| 06/02/1991 | CA2031132A1 Solution pumping system including disposable pump cassette |
| 05/28/1991 | US5018554 Device for the damping of pumps with intermittent delivery |
| 04/18/1991 | DE3933445A1 Twin piston high pressure pump aggregate - makes use of sensors to determine stroke sequence |
| 04/17/1991 | EP0422745A1 Concrete-pumping device |
| 03/28/1991 | DE4029436A1 Pressure controller for water jet cutting equipment - includes auxiliary high pressure pump compensating drops between pressure peaks of reciprocating pistons |
| 03/07/1991 | DE3929500A1 Multiple-plunger pump - has springs between driving members and plungers varying displacement dependent on working pressure |
| 03/06/1991 | EP0415317A2 No-return security apparatus |
| 03/06/1991 | EP0415311A2 Valve and device using the same |
| 02/21/1991 | WO1991002158A1 Pulseless piston pump |
| 02/21/1991 | DE3926805A1 High pressure fuel injection system - has pairs of pumps arranged in series to form pressure stages |
| 02/06/1991 | CN1011478B Pump control system |
| 01/29/1991 | US4988269 Hermetic |
| 01/29/1991 | US4988147 Hydraulic high-pressure pump for a vehicle brake system |
| 01/16/1991 | EP0407721A1 Device for the damping of pressure pulsations |
| 12/18/1990 | US4977817 Motion modifier method and apparatus |
| 12/12/1990 | EP0401320A1 Hydraulic pump. |
| 10/30/1990 | CA1275573C Method and apparatus for increasing the operating efficiency of a liquid-flow machine |
| 10/25/1990 | DE3912937A1 Piston-type hydraulic pump |
| 10/23/1990 | US4964985 Liquid chromatograph |
| 10/16/1990 | CA1275199C Constant suction pump for high performance liquid chromatography |
| 10/03/1990 | EP0389785A2 Two-cylinder-slurrypump with piston-accumulator |
| 09/29/1990 | CA2013356A1 Two cylinder solids handling pump with piston reservoir |
| 09/20/1990 | WO1990010791A1 Peristaltic pump |
| 09/19/1990 | EP0388374A1 A single cylinder reciprocating pump |
| 09/19/1990 | EP0387506A1 Hydraulic high-pressure pump for a brake system of a vehicle |
| 08/01/1990 | EP0379718A2 Device and method for moving fluid mediums |
| 07/31/1990 | US4944661 Electro-magnet actuated fuel piston pump |
| 07/25/1990 | EP0378629A1 Piston pump. |
| 07/04/1990 | EP0376247A2 Fluid sampler with miniature single-acting pump assembly |
| 06/28/1990 | WO1990007060A1 Hydraulic pump |
| 06/28/1990 | DE3842602A1 Hydraulic pump |
| 06/27/1990 | CA2006488A1 Fluid sampler with miniature single-acting pump assembly |
| 06/26/1990 | US4936383 Downhole pump pulsation dampener |
| 05/09/1990 | EP0367099A2 Liquid piston pump for chromatographic analysis appliances |
| 04/26/1990 | DE3934731A1 Prevention of cavitation in liq. displacement pump - involves valve piston used to control cross=sectional flow |
| 04/03/1990 | US4913624 Low pulsation displacement pump |
| 02/28/1990 | EP0355681A1 Damping device for pulsating delivering pumps |
| 02/28/1990 | EP0355680A1 Damping device for pulsating delivering pumps |
| 02/27/1990 | US4905161 Flow stability reporting system for a liquid chromatography system |
| 01/30/1990 | US4896548 Fluid sampler with miniature single-acting pump assembly |
| 01/25/1990 | WO1990000682A1 Piston pump |
| 01/04/1990 | DE3821726A1 Pulsation damper |
| 12/19/1989 | US4887870 Feed pump for brake systems |
| 11/30/1989 | WO1989011341A1 Method and high pressure spraying pump for pumping liquid and paste-like stuffs |
| 11/28/1989 | US4883409 Pumping apparatus for delivering liquid at high pressure |
| 11/08/1989 | EP0340374A1 Pump installation for low-pressure gradients |
| 10/05/1989 | DE3808901A1 Radial piston pump, in particular for motor-vehicle brake systems with ABS |
| 10/04/1989 | EP0334994A1 Reciprocating type fluid delivery pump |
| 09/14/1989 | DE3806464A1 Damping arrangement for damping pressure shocks in a fluid flow |
| 08/29/1989 | US4861238 Pulsation preventive member for pump |
| 07/25/1989 | US4850805 Pump control system |
| 06/27/1989 | US4842486 Method and apparatus for increasing the operating efficiency of a liquid-flow machine |
| 05/23/1989 | US4832580 Fluid pressurizing delivery pump system |
| 05/23/1989 | CA1254443A1 Reciprocating pump |
| 04/11/1989 | US4820129 Pressure measurement in fluid pump systems |
| 04/05/1989 | EP0309596A1 Pumping apparatus for delivering liquid at high pressure |
| 03/07/1989 | US4810168 Low pulsation pump device |
| 03/01/1989 | EP0304741A1 In-line pump for fuel injection systems with controlled injectors for i.c. engines |
| 02/28/1989 | US4808077 Pulsationless duplex plunger pump and control method thereof |
| 02/15/1989 | EP0303220A2 Low pulsation displacement pump |
| 01/31/1989 | US4801245 Method of damping surges in recirpocating compressors |
| 01/11/1989 | EP0298367A2 Portable ventilator apparatus |
| 01/10/1989 | US4797834 Process for controlling a pump to account for compressibility of liquids in obtaining steady flow |
| 12/13/1988 | US4790732 Driving means of the triple-cylinder plunger pump |
| 10/12/1988 | CN87208284U Universal hydraulic filter |
| 09/21/1988 | CN88101279A Pump control system |
| 09/14/1988 | EP0282323A2 Pump control system |
| 09/14/1988 | EP0177548B1 A pulsation damper for absorbing pressure pulsations in a high pressure hydraulic system. |
| 08/17/1988 | EP0278739A1 Constant suction pump for high performance liquid chromatography |
| 06/28/1988 | US4753581 Constant suction pump for high performance liquid chromatography |
| 05/05/1988 | DE3735816A1 Pump system for dispensing pressurised fluid |
| 05/04/1988 | EP0265591A2 Reciprocating pump |
| 04/27/1988 | EP0264934A2 Low pulsation pump device |
| 03/29/1988 | US4734011 Pulsation dampener for reciprocating pumps |
| 03/23/1988 | EP0260760A2 Liquid chromatograph |
| 03/08/1988 | US4729720 Apparatus for continuously generating hydraulic pressure |
| 02/23/1988 | CA1233070A1 Oscillating-deflector pump |
| 02/16/1988 | CA1232825A1 Cross loop attenuator for hydraulic systems |
| 01/26/1988 | US4721444 Fluid pump incorporating pulsation dampener surrounding its shaft |
| 12/15/1987 | US4712584 Surge suppressor |
| 11/04/1987 | EP0243675A1 Method of pulsation damping at piston compressors |
| 09/01/1987 | US4690622 Liquid intensifier unit |
| 08/18/1987 | US4687426 Cam machine |
| 08/13/1987 | DE3603148A1 Hydraulic pump, in particular steering booster pump |
| 07/29/1987 | EP0229970A1 Method and apparatus for the operation of liquid flow machines |