| Patents for F04B 1 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (10,723) |
|---|
| 05/21/1991 | US5017095 Power transmission |
| 05/21/1991 | US5016597 Crankshaft driven compressor for supplying air to a fuel injection mechanism |
| 05/16/1991 | WO1991006760A1 Inclined-shaft axial piston machine |
| 05/16/1991 | DE4035748A1 High speed axial piston pump - has pressed against seal of barrel and including pressure zone |
| 05/15/1991 | CN2077038U Dual-cylinder hand pressure pump |
| 05/14/1991 | US5014513 Self-sealing transfer tube for port plate |
| 05/08/1991 | DE3936812A1 Axialkolbenmaschine in schraegachsenbauweise Axial piston schraegachsenbauweise |
| 05/07/1991 | US5013219 Positive displacement piston pump |
| 05/02/1991 | DE4034267A1 radial piston pump with hollow pistons - has arrangement of control chamber as polygon with radial bores |
| 05/02/1991 | DE3935800A1 Axial piston machine of swash plate type - has provision for fitting of interchangeable position controllers |
| 04/30/1991 | US5011377 Swash-plate type piston pump motor |
| 04/30/1991 | US5011305 Cage for a sectorial antifriction bearing |
| 04/23/1991 | US5009580 Multiple reciprocating pump |
| 04/18/1991 | WO1991005163A1 Improved fluid-working machine |
| 04/18/1991 | WO1991005161A1 Piston type pump motor |
| 04/17/1991 | CN1050756A Power transmission |
| 04/16/1991 | US5007805 Reversible variable displacement hydraulic device |
| 04/16/1991 | US5007332 Piston for piston machines |
| 04/10/1991 | EP0421834A1 Process for depositing an amorphous, inorganic, protective coating on an organic polymer substrate |
| 04/10/1991 | CN2074826U Single cylinder water pump spraying device |
| 04/04/1991 | WO1991004414A1 Radial piston pump |
| 04/03/1991 | EP0419984A2 Electrohydraulic control of a hydraulic machine |
| 04/03/1991 | EP0343163B1 High pressure cleaning apparatus with a wobble plate piston pump |
| 04/03/1991 | CN1012273B Ring valve pump |
| 04/02/1991 | US5004406 Radial piston pump |
| 03/28/1991 | DE4029508A1 Radial piston lubricating pump for gearing - is incorporated in driving spindle and is operated by eccentric ring as spindle rotates |
| 03/27/1991 | CN1050248A Compensation method of overbalance pressure and double row plunger radial plunger pump |
| 03/27/1991 | CN1012211B Hydraulic energy exchanger |
| 03/27/1991 | CN1012198B Rotary piston and barrel machine with fixed centering toggle type joint |
| 03/27/1991 | CN1012197B Refrigerant compressor |
| 03/26/1991 | US5001964 Pressurized fluid mechanism with two cubic capacities and closed circuit applying same |
| 03/21/1991 | WO1991003628A1 Device for adjusting the relative angle of rotation of a shaft to a drive wheel, especially the camshaft of an internal combustion engine |
| 03/20/1991 | EP0252105B1 Axial piston machine |
| 03/12/1991 | US4999020 Variable displacement high pressure pump with internal power limiting arrangement |
| 03/07/1991 | DE3929500A1 Multiple-plunger pump - has springs between driving members and plungers varying displacement dependent on working pressure |
| 03/07/1991 | DE3928375A1 Piston pump with two pistons of different dia. - incorporates connecting channel to reduce pulsations |
| 03/06/1991 | EP0415536A1 Pumps |
| 03/06/1991 | EP0414955A1 High-pressure pump for cleaning-devices or the like |
| 03/05/1991 | US4997344 Rotor bearing pre-load for a radial piston pump |
| 02/21/1991 | WO1991002158A1 Pulseless piston pump |
| 02/21/1991 | WO1991002157A1 Radial piston pump arrangement |
| 02/21/1991 | WO1991002156A1 Piston pump |
| 02/19/1991 | US4993921 Power transmission |
| 02/14/1991 | DE4024243A1 Radial piston pump with eccentrically driven pistons - incorporates two independent pump circuits, each with separate inlets |
| 02/14/1991 | DE3926185A1 Compound roller bearing shell for radial piston machine - has roller bearing shell of steel, bronze and plastics layers with indented shape cooperating with piston |
| 02/13/1991 | CN1011611B Refrigerant compressor |
| 02/12/1991 | US4991492 Hydrostatic axial piston machine |
| 02/07/1991 | DE4024319A1 Hydraulic swashplate drive linkage system - incorporates configuration for ball and socket joint |
| 02/07/1991 | DE4024242A1 Valve element head for radial piston pump - has stepped profile which gives linear delivery characteristics |
| 02/06/1991 | CN2070832U Uhv electric oil pump |
| 02/05/1991 | US4990065 Plunger pump |
| 02/05/1991 | US4990062 Positive displacement pumps |
| 01/31/1991 | DE4022858A1 Axial piston machine - with pistons running on cam track with two top and two bottom dead-centres |
| 01/23/1991 | EP0409084A2 Bent axis type variable displacement hydraulic machine |
| 01/23/1991 | CN1011328B Refrigerant compressor |
| 01/15/1991 | CA1278953C Pump |
| 01/08/1991 | US4983100 Radial piston pump |
| 01/08/1991 | US4983099 Torque-velocity control for variable displacement hydraulic motor |
| 01/08/1991 | US4982566 Expander band for hydrostatic transmission |
| 01/02/1991 | CN2068598U Axial plunger pump controlled by microcomputer |
| 01/02/1991 | CN2068597U Horizontal oil water emulsion plunger for coal-winning machine |
| 01/02/1991 | CN2068596U High pressure sprinkler |
| 12/27/1990 | WO1990015931A1 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 |
| 12/27/1990 | EP0404540A1 A system for controlling a pump apparatus |
| 12/26/1990 | CN1010968B Servo system |
| 12/25/1990 | US4979406 Cam with sinusoidal cam lobe surfaces |
| 12/19/1990 | EP0402871A2 Control device for variable displacement pump |
| 12/19/1990 | EP0402623A1 Piston for axial piston machines |
| 12/19/1990 | CN1010871B Radial piston pump for conveying water |
| 12/18/1990 | US4978284 Double acting simplex plunger pump |
| 12/13/1990 | WO1990015246A1 Bearing lubrication in axial piston fluid devices |
| 12/12/1990 | EP0401408A1 Radial-piston machine |
| 12/12/1990 | CN2067328U Booster water injection pump |
| 12/12/1990 | CN1047723A Power transmission |
| 12/11/1990 | US4977606 Radial piston pump |
| 12/06/1990 | DE3918022A1 Cast piston guide plate for high pressure pump - has rib formed on guide bosses to increase rigidity |
| 12/05/1990 | EP0400693A2 High pressure pump |
| 12/05/1990 | EP0400507A2 High pressure unit |
| 12/04/1990 | US4975025 Hydraulic radial piston pump |
| 12/04/1990 | US4974496 A hydrocyclic motor |
| 11/28/1990 | CN2066509U Axial hydraulic pump with mean structure made of engineering ceramics |
| 11/27/1990 | USRE33455 Swashplate assembly for a swashplate type hydraulic pressure device |
| 11/22/1990 | EP0398146A1 Hydraulic machine with axial pistons of the swash plate type with a follow-up mechanism for the cage of the swash plate segment bearing |
| 11/20/1990 | US4971532 Oil metering pump with air purge |
| 11/14/1990 | EP0396898A1 Piston for pistonmachines |
| 11/07/1990 | EP0396328A1 A pump/motor control mechanism |
| 11/07/1990 | CN1046778A Apparatus for controlling volume of pumps or motor |
| 11/06/1990 | US4968227 Variable displacement fluid pump with improved wideband neutral |
| 11/06/1990 | US4968220 Radial piston pump, particularly a fuel injection pump for diesel engines |
| 11/06/1990 | US4967555 Hydraulic continuously variable speed transmission with relief valve to prevent engine stall |
| 10/30/1990 | US4966530 Hydraulic pump and motor assemblies for vehicle hydraulic systems |
| 10/24/1990 | EP0394061A2 Variable-stroke crank mechanism |
| 10/24/1990 | EP0393688A2 A hydraulic control system |
| 10/16/1990 | CA1275199C Constant suction pump for high performance liquid chromatography |
| 10/11/1990 | DE4010550A1 Swash plate pump with two series of pistons - make use of control valve to determine oil feed |
| 10/11/1990 | DE3911562A1 Positive-displacement pump or positive-displacement motor for fluids |
| 10/11/1990 | DE3911129A1 Hydraulic axial piston machine |
| 10/11/1990 | DE3911128A1 Hydraulic axial piston machine |
| 10/10/1990 | EP0391097A1 Device for controlling the operation of hydraulic engines |
| 10/03/1990 | EP0389644A1 Variable capacitance, oblique spindle type hydraulique machine |