| Patents for F04B 11 - Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation (1,551) |
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| 12/09/1993 | WO1993024755A1 Reduced pulsation tapered ramp pump head |
| 12/09/1993 | CA2136015A1 Reduced pulsation tapered ramp pump head |
| 11/30/1993 | US5265421 Underwater hydraulic system for reducing liquidborne noise |
| 11/17/1993 | CN1078540A Pumping of liquified gas |
| 11/16/1993 | US5261798 Double membrane pump |
| 11/02/1993 | US5257917 Peristaltic pump having means for reducing flow pulsation |
| 10/20/1993 | EP0566151A1 Pumping of liquified gas |
| 10/19/1993 | US5253982 Electrohydraulic pump load control system |
| 10/12/1993 | US5252037 Piston valved vertical pump for particulate materials |
| 10/07/1993 | DE4211015A1 Piston pump or membrane pump for delivery of fuel to burner for heater - uses balancing system of cylinder chamber and piston to ensure pulsation-free output. |
| 10/05/1993 | US5249929 Liquid chromatographic pump |
| 09/28/1993 | US5247869 Method and a device for damping flow pulsations in hydrostatic hydraulic machines of the displacement type |
| 09/22/1993 | EP0561262A1 Pump for viscous materials having cylinders, in particular two cylinder concrete pump |
| 09/20/1993 | CA2092044A1 Slurry pump with discharge cylinders, especially two-cylinder concrete pump |
| 09/14/1993 | US5244364 Pumping unit |
| 07/29/1993 | DE4201825A1 Valve for vehicle antilock braking circuit - has throttle in front of inlet and uses slider subject to pump pressure |
| 07/27/1993 | US5230614 Reduced pulsation tapered ramp pump head |
| 07/14/1993 | EP0550810A2 Double diaphragm pump |
| 07/01/1993 | DE4142993A1 Electric motor driving radial force loads, e.g. pumps and compressors - has disk-shaped vibration absorber inserted on rotor shaft at back side of motor case |
| 06/17/1993 | DE4141211A1 Fuel delivery system for motor vehicle - has fuel pump in housing, encapsulated by gas-filled housing, and pump elastically supported in second housing by springs and dampers |
| 06/15/1993 | US5220225 Integrated electric motor driven inline hydraulic apparatus |
| 06/15/1993 | US5219273 Torsional damper for air conditioning compressor |
| 06/15/1993 | US5218827 Pumping of liquified gas |
| 05/25/1993 | US5213482 Hydraulic radial-type piston pump |
| 05/25/1993 | US5213478 Slurry pumping method and apparatus |
| 04/28/1993 | EP0378629B1 Piston pump |
| 04/13/1993 | US5201175 Hydraulic actuating system and method |
| 04/06/1993 | US5199857 Dual plunger pump system |
| 03/25/1993 | DE4130295A1 Dispensing system for aggressive fluids or pastes - has double piston pump units operated in synchronised cycle to deliver output keeping pulsation low |
| 03/23/1993 | US5195879 Improved method for injecting treatment chemicals using a constant flow positive displacement pumping apparatus |
| 03/03/1993 | EP0529393A1 Dosing pump |
| 03/02/1993 | US5190443 Hydropneumatic constant pressure device |
| 02/28/1993 | CA2076062A1 Method and device for dosing pumping |
| 02/23/1993 | US5188519 Saturated fluid pumping apparatus |
| 01/28/1993 | DE4124394C1 Hydraulic pump with opposed pistons - is used in two=stroke engine and has shut=off valve fitted to compensating cylinders |
| 01/21/1993 | DE4123669A1 Intake-controlled reciprocating pump - having pressure medium duct with varying coefficients of resistance |
| 01/20/1993 | EP0523302A2 Saturated fluid pumping apparatus |
| 12/30/1992 | EP0520286A2 Radial piston pump |
| 12/29/1992 | US5174713 Circumferential flow type fuel pump |
| 12/23/1992 | WO1992022748A1 Programmable high pressure intensifier |
| 12/15/1992 | US5171134 For reducing the effect of pulsations of flowing liquid in a pumping system |
| 12/15/1992 | CA2044704A1 Programmable high pressure intensifier |
| 12/10/1992 | WO1992021879A1 A pump system |
| 12/10/1992 | DE4118949A1 Pump or compressor of radial or axial piston type - inclusion of noise damper having expansion chamber with tangential and constricted pressure inlet |
| 12/02/1992 | EP0515914A1 Homogenising machine and its method of operation |
| 12/01/1992 | US5167495 Reciprocating hydraulic pump |
| 11/24/1992 | US5165875 Reciprocating hydraulic pump |
| 11/24/1992 | CA1310512C Pump control system |
| 11/19/1992 | DE4215403A1 Double piston pump for spraying wet concrete or mortar - uses alternating pistons with changeover link to pump material and sensors to detect end of stroke |
| 11/17/1992 | US5163822 Radial piston pump |
| 11/12/1992 | WO1992019867A1 Process and device for the controlled metering of at least one pourable component |
| 11/11/1992 | EP0512688A2 Proportioning pump |
| 10/28/1992 | EP0511124A1 Vibrating pump with improved efficiency |
| 10/27/1992 | US5158441 Proportioning pump |
| 10/20/1992 | US5156537 Multiphase fluid mass transfer pump |
| 09/08/1992 | US5145339 Pulseless piston pump |
| 08/27/1992 | DE4135491A1 Pressure shock damper for pipes in bore hole - uses air chamber above submerged pump |
| 08/25/1992 | US5141415 Piston pump |
| 07/15/1992 | EP0494275A1 Pressure pulsation absorber |
| 07/14/1992 | US5129792 Refrigerant compressor having gas pulsation suppression device |
| 07/08/1992 | EP0486556A4 Pulseless piston pump |
| 07/07/1992 | US5127807 Ultra high pressure field end for a reciprocating pump |
| 07/07/1992 | US5127712 ABS pump output pulsation dampener |
| 06/24/1992 | EP0491159A1 Hydraulic antilock brake system for vehicles |
| 06/23/1992 | US5123819 Pressure fluid pumping device with a reciprocating piston pump |
| 05/27/1992 | EP0486556A1 Pulseless piston pump. |
| 05/19/1992 | US5114319 Concrete-pumping device |
| 05/19/1992 | US5114314 Reciprocating type fluid delivery pump |
| 05/07/1992 | DE4102704A1 High pressure drive unit, control or pump - has reciprocating pistons on timed basis and activated and controlled by fluid pressure |
| 04/29/1992 | EP0482774A2 Positive displacement pump with rotating reciprocating piston |
| 04/28/1992 | US5108264 Method and apparatus for real time compensation of fluid compressibility in high pressure reciprocating pumps |
| 04/25/1992 | CA2052201A1 Positive displacement pump with rotating reciprocating piston and improved pulsation dampening |
| 04/09/1992 | DE4031239A1 Adjustable pressure pulse damper for piston pumps - has nitrogen@-filled damping vol. bounded by membrane at end of plunger with magnetic position feedback |
| 04/08/1992 | EP0479620A1 Filter device |
| 04/07/1992 | US5102311 Integral pressure pulse attenuator |
| 03/19/1992 | WO1992004543A1 A displacement pump as well as a pump assembly comprising two displacement pumps |
| 03/17/1992 | US5096400 Hydraulic pump |
| 03/17/1992 | US5096394 Positive displacement pump with rotating reciprocating piston and improved pulsation dampening |
| 03/10/1992 | US5094599 Radial piston pump, in particular for automotive vehicle brake systems with anti-lock control |
| 02/26/1992 | EP0471930A1 Method for real time compensation of fluid compressibility in high pressure reciprocating pumps |
| 02/18/1992 | US5088903 Compressor, spray apparatus using the compressor, and air brush for the spray apparatus |
| 02/18/1992 | US5088898 Reciprocating pump |
| 02/06/1992 | WO1992001867A1 Pressure pulsation absorber |
| 01/30/1992 | DE4023709A1 Vorrichtung zur absorption von druckpulsationen A device for absorbing pressure pulsations |
| 01/29/1992 | EP0468834A1 Hydraulic alternating piston pump |
| 01/29/1992 | EP0468833A1 Hydraulic reciprocating piston pump |
| 01/08/1992 | EP0464762A2 Circumferential flow type fuel pump |
| 12/31/1991 | US5076769 Double acting pump |
| 12/08/1991 | WO1991019099A1 Apparatus for repetitively dispensing a measured volume of liquid |
| 12/08/1991 | CA2084675A1 Apparatus for repetitively dispensing a measured volume of liquid |
| 12/04/1991 | EP0459434A2 Hydropneumatic constant pressure device for automatic control of the operation and stopping of electrical motorpumps |
| 11/27/1991 | EP0458114A1 Radial piston pump |
| 11/19/1991 | US5066199 Method for injecting treatment chemicals using a constant flow positive displacement pumping apparatus |
| 11/13/1991 | CN2088609U Self air lift tube oil pump |
| 11/12/1991 | US5064360 Surge chamber for swing valve grout pumps |
| 11/05/1991 | US5062774 Solution pumping system including disposable pump cassette |
| 10/22/1991 | US5058961 Apparatus for damping pressure fluctuations |
| 10/16/1991 | EP0451942A1 Double-acting positive displacement pump |
| 10/12/1991 | CA2037591A1 Double-acting positive displacement pump |
| 09/18/1991 | EP0446454A1 Pump installation with a piston pump |