| Patents for F04B 1 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (10,723) |
|---|
| 10/03/1990 | CA2012510A1 Apparatus for controlling the operation of hydraulic motors |
| 09/25/1990 | US4958989 Digital fluid control of a pressure compensated pump |
| 09/20/1990 | DE3908744A1 Piston engine with positively interlocking power-transmitting parts |
| 09/18/1990 | CA1274120A1 Folded channel radial pump |
| 09/12/1990 | EP0386738A2 Variable displacement pump or motor and neutral centering mechanism therefor |
| 09/11/1990 | US4955585 Hydraulically driven fan system for water cooling tower |
| 09/05/1990 | EP0384974A1 Hydrostatic machine |
| 09/05/1990 | CN1009478B Crankshaft-type axial piston pump or motor |
| 09/04/1990 | US4953524 Radial piston engine |
| 09/04/1990 | US4953426 Housing support for hydraulic displacement unit swashplate |
| 08/28/1990 | US4952121 Radial piston pump with means preventing ovalization of piston chamber |
| 08/28/1990 | US4951551 Variable displacement hydraulic motor |
| 08/22/1990 | EP0383546A2 Fuel injection pump |
| 08/22/1990 | EP0383167A1 Axial piston engine |
| 08/21/1990 | US4950137 Radial piston machine having pivoted control means engaging cam ring |
| 08/16/1990 | EP0382388A1 Fuel injection pump |
| 08/09/1990 | DE4002712A1 Radial piston pump with flanged cup - uses tapered thread to secure pressure limiting valve |
| 08/08/1990 | CN1009125B Cylinder piston type rotary mechanism with a centre-fixed ball shaft |
| 08/07/1990 | US4945817 Axial piston device |
| 08/01/1990 | EP0379501A1 Axial piston motor, reversible as a pump, with modular multiple piston chambers |
| 07/23/1990 | CA2008410A1 Pump fluid end |
| 07/18/1990 | CN2059459U Electric reciprocating pump |
| 07/11/1990 | EP0377047A1 Main bearing device for motor of bent axis type axial piston pump |
| 07/11/1990 | CN1008759B Cylinder head for refrigerating compressor |
| 06/28/1990 | WO1990007059A1 Hydraulic motor or pump with constant clamping force between rotor and port plate |
| 06/20/1990 | EP0373252A1 Axial piston unit and control device |
| 06/20/1990 | CN1008466B Cylinder block for refrigerating compressor |
| 06/19/1990 | US4934253 Axial piston pump |
| 06/19/1990 | US4934252 Variable displacement pump or motor and neutral centering mechanism therefor |
| 06/19/1990 | US4934251 Hydraulic motor or pump with constant clamping force between rotor and port plate |
| 06/16/1990 | CA2002487A1 Hydraulic motor or pump with constant clamping force between rotor and port plate |
| 06/13/1990 | CN1042970A Multilayer plunger pump |
| 06/13/1990 | CN1008388B Fluid operated pump displacement control system |
| 06/12/1990 | US4932310 Bearing lubrication in axial piston fluid devices |
| 06/07/1990 | DE3840549A1 Device for driving a variable delivery (displacement, volume) pump |
| 06/07/1990 | DE3840548A1 Device for driving a variable delivery (displacement, volume) pump |
| 06/05/1990 | US4930994 Radial piston pump |
| 06/05/1990 | US4930312 Brake actuator for hydraulic motors |
| 05/23/1990 | DE3838801A1 Axial-piston unit and cam body |
| 05/22/1990 | US4927338 Radial piston pump |
| 05/22/1990 | CA1269303A1 Swashblock lubrication in axial piston fluid displacement devices |
| 05/17/1990 | WO1990005243A1 Radial piston pump |
| 05/17/1990 | DE3935116A1 Positive-displacement radial plunger pump - has plain bearing connected to pipe for oil to be pumped |
| 05/17/1990 | DE3838284A1 Axial-piston unit |
| 05/10/1990 | DE3935117A1 Radial piston pump with eccentric on shaft - chill mould casting technique provides bearing metal layer |
| 05/09/1990 | EP0367476A1 Variable displacement pumps |
| 05/08/1990 | US4922715 Hydraulically operated continuously variable transmission |
| 05/02/1990 | CN1007833B Rotary fluid energy conversion device |
| 05/02/1990 | CA2001780A1 Variable displacement pumps |
| 05/01/1990 | US4920860 Device for biasing a cylinder drum of a variable-displacement axial piston machine against an associated slide valve member |
| 05/01/1990 | US4920859 Radial piston pump and motor |
| 05/01/1990 | US4920856 Axial piston machine of the swashplate or bent axis type having slot control and pressure balancing passages |
| 04/25/1990 | EP0365420A1 Dual-capacity mechanism driven by pressurised fluid, and its use in a closed circuit |
| 04/24/1990 | US4918918 Variable displacement piston machine |
| 04/19/1990 | WO1990004101A1 Variable capacitance, oblique spindle type hydraulique machine |
| 04/19/1990 | DE3835315A1 Segmental bearing for swivelling movements |
| 04/18/1990 | EP0363361A1 Folded channel radial pump |
| 04/11/1990 | CN2055872U Double cylinder axial piston pump |
| 04/11/1990 | CN1007543B Power transmission system |
| 04/10/1990 | US4915595 Valve/piston cartridge and rotor bearing pre-load for a radial piston pump |
| 04/05/1990 | WO1990003520A1 Low-noise pump assembly |
| 04/05/1990 | WO1990003519A1 Pump control method and poppet valve therefor |
| 04/05/1990 | WO1990003518A1 Axial piston hydrostatic machine with variable displacement |
| 04/04/1990 | EP0361927A1 Pump control method and poppet valve therefor |
| 04/03/1990 | US4913628 Radial piston pump for pumping water |
| 03/29/1990 | DE3930248A1 Radial piston pump with cylinders in parallel planes - incorporates differently positioned different-sized inlet bores |
| 03/29/1990 | DE3927963A1 Rotary piston pump and motor - has ball bearings which engage inclined groove in piston |
| 03/27/1990 | US4911064 Piston and barrel machine with fixed centering toggle type joint |
| 03/27/1990 | US4911063 Hydraulically operated swash-plate apparatus |
| 03/27/1990 | US4910846 Method of adjusting the axial play between a journalled shaft and a surrounding bearing casing |
| 03/22/1990 | WO1990002876A1 Radial piston pump |
| 03/22/1990 | DE3930542A1 Radial piston pump for engine cooling system - uses electromagnet to operate flow control valve |
| 03/15/1990 | DE3928006A1 Axial piston pump for high pressure cleaning installation - has cast cylinder block with integral inlet and outlet section |
| 03/14/1990 | EP0357698A1 Hydrostatic axial piston engine, in particular for a motor vehicle gearbox with power split. |
| 03/13/1990 | US4907408 Variable displacement hydraulic servomotor system |
| 02/28/1990 | EP0204837B1 Swashplate centring device |
| 02/28/1990 | CN1007001B Rotary fluid transfer device |
| 02/28/1990 | CN1006999B Rotary fluid energy converter |
| 02/27/1990 | US4904161 Apparatus for controlling hydrualic pump |
| 02/27/1990 | US4903577 Adjustable axial piston machine with a swash plate design |
| 02/27/1990 | US4903545 Hydrostatic transmission center section |
| 02/20/1990 | US4902208 Pump having piston and cylinder rotatable respectively about spaced axes transverse to the reciprocating axis |
| 02/20/1990 | CA1265976A1 Axial piston pump including ball piston |
| 02/14/1990 | EP0354725A1 Hydraulic pump and motor assemblies for vehicle systems |
| 02/13/1990 | US4899957 Air borne craft, for example helicopter, and related devices |
| 02/07/1990 | CN1039468A Slant plate type compressor with variable displacement mechanism |
| 02/06/1990 | US4898129 Valve control of internal combustion engines by means of a cam-driven rotary piston pump |
| 02/06/1990 | US4898077 Self-bleeding hydraulic pumping apparatus |
| 02/06/1990 | US4898076 Multiple cylinder-capacity pressurized fluid (motor or pump) mechanism |
| 01/30/1990 | US4896585 Adjustable axial piston machine |
| 01/30/1990 | US4896583 Saddle bearing support for axial piston pumps and motors |
| 01/25/1990 | DE3923529A1 Multiple cylinder radial piston pump - makes use of fluid storage chamber to damp out pressure pulsations |
| 01/16/1990 | US4894045 Universal joint having driving pins parallel to one of coupled shafts and swingably and radially slidable to the other shaft |
| 01/16/1990 | US4893994 Guide assembly and guide shoe for a variable angle wobble plate compressor |
| 01/16/1990 | US4893549 Adjustable axial piston machine having a bent axis design |
| 01/16/1990 | US4893548 Hydraulically operated swash-type apparatus |
| 01/09/1990 | US4892468 Hydraulic pump |
| 01/04/1990 | DE3822329A1 Method of manufacturing a drive shaft for a hydrostatic machine, and such a drive shaft |
| 01/04/1990 | DE3821844A1 Hydrostatische verdraengermaschine (pumpe oder motor) Hydrostatic displacement (pump or motor) |
| 01/02/1990 | US4890539 Control body arrangement for axial flow applyable in pumps, motors or engines |