| Patents for F04B 1 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (10,723) |
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| 02/17/1994 | WO1994003708A1 Axial piston machine, in particular an axial piston pump or an axial piston motor |
| 02/17/1994 | DE4227037A1 Hydrostatic axial piston pump - uses three beings for two shafts to reduce structural length |
| 02/17/1994 | CA2141812A1 Axial piston machine, in particular an axial piston pump or an axial piston motor |
| 02/16/1994 | CN1082149A Volume-changing mechanism for digital variable volume pump with axial plunger |
| 02/16/1994 | CN1023825C Flexible piston engine |
| 02/15/1994 | US5285641 Flow dividing pump |
| 02/09/1994 | CN2155446Y Gas-liquid pump |
| 02/03/1994 | WO1994002740A1 Hydraulic positive-displacement pump |
| 02/03/1994 | DE4225381A1 Axial piston swash plate pump - incorporates auxiliary positive displacement pump to reduce installation space in hydrostatic drive |
| 02/02/1994 | EP0491809B1 Radial piston pump |
| 01/27/1994 | DE4224651A1 Vehicular automatic or stepless transmission with radial piston pump - has electronic controller of valve for filling pump which sucks oil into pockets distributed around inlet channel |
| 01/27/1994 | DE4224592A1 Hydraulische Verdrängerpumpe Displacement hydraulic pump |
| 01/26/1994 | CN2154362Y Miniature plunger type electric lubricating oil pump |
| 01/25/1994 | US5281104 Sequential displacement piston pump |
| 01/25/1994 | US5280746 Pressure fluid pump for a brake system |
| 01/25/1994 | CA1326475C Slant plate type compressor with variable displacement mechanism |
| 01/20/1994 | WO1994001676A1 Hydrostatic machine with axial thrust compensation |
| 01/19/1994 | EP0579117A1 Variable displacement hydrostatic device and neutral return mechanism therefor |
| 01/18/1994 | US5279867 Subjecting gas medium to radiation; decomposition of compound or alloy at low temperature |
| 01/18/1994 | US5279209 Rotary machine |
| 01/18/1994 | US5279208 Rotary reciprocating engine with synchronization mechanism |
| 01/18/1994 | US5279206 Variable displacement hydrostatic device and neutral return mechanism therefor |
| 01/13/1994 | DE4322560A1 Radial piston pump - has pistons with increased cross section at seal with flat base against eccentric intermediate |
| 01/12/1994 | EP0578390A1 An integrated electric motor-driven inline hydraulic apparatus |
| 01/12/1994 | EP0578005A1 Sound-dampened hydrostatic fluid displacement machine |
| 01/12/1994 | EP0490894B1 Hydraulic motor or pump with constant clamping force between rotor and port plate |
| 01/12/1994 | EP0377047B1 Main bearing device for motor of bent axis type axial piston pump |
| 01/11/1994 | US5277553 Valve-controlled displacer unit having valve triggering |
| 01/11/1994 | US5277338 Fluid metering apparatus |
| 01/06/1994 | WO1994000691A1 Radial piston pump |
| 01/05/1994 | EP0576727A1 Control systems for variable displacement hydraulic pumps |
| 01/05/1994 | EP0576467A1 Distillation. |
| 01/05/1994 | DE4221705A1 Hydrostatische Maschine mit axialem Schubausgleich Hydrostatic machine with axial thrust balancing |
| 12/28/1993 | US5273403 Control systems for variable displacement hydraulic pumps |
| 12/15/1993 | EP0573734A1 Method for controlling hydraulic pump driven by engine |
| 12/09/1993 | WO1993024753A1 Double pump |
| 12/09/1993 | DE4318073A1 Radial piston pump with pot-shaped pistons - uses inserts concentric with piston springs to minimise fluid dead space |
| 12/02/1993 | DE4238376A1 Radial piston pump with elastic valve ring - uses fluid pressure from pistons to rotate valve ring and so distribute wear uniformly |
| 12/01/1993 | EP0478675B1 A loading machine equipped with a first and a second pump supplying pressure oil to at least one hydraulically driven working component, such as a hydraulic piston-cylinder device or hydraulic motor |
| 12/01/1993 | CN2148198Y Positive displacement well pump |
| 12/01/1993 | CN2148191Y Submersible pump |
| 11/30/1993 | US5265331 Method of manufacturing a piston for an axial piston fluid translating device |
| 11/25/1993 | WO1993023670A1 Hydrostatic engine with oil leakage channel |
| 11/25/1993 | DE4216487A1 Radial piston pump with suction side throttle - uses control journal with two-section flow control channel to create throttle gap |
| 11/23/1993 | US5263401 Hydraulic regenerative braking and four wheel drive system |
| 11/16/1993 | US5261796 Electric-motor in-line integrated hydraulic pump |
| 11/16/1993 | US5261318 Pressure fluid mechanism provided with special balancing enclosures |
| 11/16/1993 | CA1324361C Variable displacement compressor with biased inclined member |
| 11/11/1993 | DE4214765A1 Piston-slipper connection for axial piston swashplate pump - uses ball with flattened surfaces attached to neck of slipper |
| 11/09/1993 | US5259738 Fluid-working machine |
| 11/03/1993 | EP0567805A1 Mounting of two mutually inclined components within a housing |
| 10/28/1993 | DE4213861A1 Radial piston pump with small axial dimensions - has cylinder block divided into two parts along plane parallel to central axis |
| 10/28/1993 | DE4213815A1 Radial piston pump having high delivery volume - uses lift curve element with peripherally spaced maxima to give harmonic movement |
| 10/28/1993 | DE4213798A1 Radial piston fuel pump for combustion engine - uses valve plate contained entirely within recess in cylinder head |
| 10/28/1993 | DE4213781A1 Radial piston fuel pump for combustion engine - uses channel from suction valve intake having two distinct profiles |
| 10/20/1993 | EP0566067A2 Bearing unit and electric pump using the same |
| 10/20/1993 | CN2144193Y High-pressure plunger pump |
| 10/19/1993 | US5253983 Axial piston pump having fixed slant cam plate for causing reciprocation of pistons |
| 10/19/1993 | US5253576 Swashplate assembly for an axial piston pump |
| 10/14/1993 | DE4311501A1 Multispeed hydraulic drive system - consists of radial and axial reciprocating machines connected by distributor disc |
| 10/13/1993 | EP0564500A1 A radial piston motor or pump. |
| 10/12/1993 | US5251537 Hydraulic driving system |
| 10/12/1993 | US5251536 Fluid translating device |
| 10/07/1993 | DE4211551A1 Adjustable pump with cartridge type valves - has pressure limiting valve and pressure switching valve incorporated as single unit |
| 10/07/1993 | DE4209461A1 Axial piston swash plate pump for use as high pressure cleaner - has series of second bores arranged in parallel with each piston bore |
| 10/05/1993 | US5249935 Piston pump |
| 10/05/1993 | US5249512 hydrostatic pump and motor |
| 10/05/1993 | US5249507 Swash-plate plunger type hydraulic apparatus |
| 10/05/1993 | US5249506 Rotary piston machines with a wear-resistant driving mechanism |
| 09/30/1993 | DE4210038A1 Speed dependent, hydraulic camshaft adjustment for IC engine - has pump with supply volume controlled by motor between camshaft and drive via hydraulic operating chamber |
| 09/29/1993 | EP0561933A1 A radial piston motor or pump. |
| 09/29/1993 | CN1076764A Slant plate type compressor with variable capacity control mechanism |
| 09/28/1993 | US5247869 Method and a device for damping flow pulsations in hydrostatic hydraulic machines of the displacement type |
| 09/28/1993 | US5247794 Cylinder block positive hold-down for cold start-up |
| 09/22/1993 | EP0436564B1 Low-noise pump assembly |
| 09/21/1993 | US5246355 Well service pumping assembly |
| 09/16/1993 | DE4307745A1 Variable delivery compressor with eccentrically mounted rotor - has by=pass channel between chambers which is opened and closed by folding bellows. |
| 09/16/1993 | DE4208004A1 Electrohydraulic power-assisted steering for motor vehicles - has purely mechanical valve arrangement integrated into reversible pump contg. radial pistons and eccentric sliding bearing ring |
| 09/15/1993 | EP0560233A2 Metal-ceramic compound component |
| 09/14/1993 | US5244356 Hydraulic piston apparatus |
| 09/08/1993 | EP0558696A1 Drive unit, in particular motor-driven pump unit for slip controlled braking systems |
| 09/07/1993 | US5241872 Swashplate centering mechanism for a variable displacement pump |
| 09/07/1993 | US5241822 Axial piston machine for installation in a gearbox |
| 09/01/1993 | EP0558389A1 Hydraulic piston pump with inlet valves |
| 09/01/1993 | EP0557316A1 A method in a radial piston eccentric motor/pump and a corresponding radial piston eccentric motor/pump |
| 09/01/1993 | CN1075774A Non-crankshaft and non-connecting rod engine and compressor |
| 08/31/1993 | US5239893 W-mechanism and radial-plunger-type hydraulic pressure apparatus incorporating such W-mechanism |
| 08/29/1993 | CA2090715A1 Improved suction valve piston hydraulic pumps |
| 08/24/1993 | US5237907 Radial piston machine having working fluid passing through the crankcase |
| 08/19/1993 | DE4304390A1 Radial piston pump - has needle bearing as roller bearing, with outer ring of deep-drawn metal plate, and needles rolling off shaft journal |
| 08/18/1993 | EP0556020A1 Variable displacement fluid pressure energy translating device |
| 08/12/1993 | DE4203619A1 Combined axial piston pump and electric motor unit - incorporates noise curbing elements between flanges of pump support block attached to motor |
| 08/11/1993 | EP0554537A1 Machine with axial pistons, particularly hydraulic pump of swash plate or inclined axis type, with an output adjusting device |
| 08/10/1993 | US5234321 Variable displacement hydrostatic pump and neutral return mechanism therefor |
| 08/05/1993 | WO1993014960A1 Pump with pressure valve |
| 08/03/1993 | US5231914 Variable displacement compressor |
| 08/03/1993 | US5231912 Bent axis type variable displacement hydraulic machine |
| 07/29/1993 | DE4201826A1 Pumpe mit einem druckventil Pump with a pressure valve |
| 07/28/1993 | CN1074733A Slant plate type compressor with variable capacity control mechanism |
| 07/27/1993 | US5230610 Axial piston pump |