Patents
Sitemap › F04 - Positive-displacement machines for liquids; Pumps for liquids or elastic fluids › F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; Rotary-piston, or oscillating-piston, positive-displacement pumps › F04C 2 - Rotary-piston machines or pumps
Patents for F04C 2 - Rotary-piston machines or pumps (14,296)
09/1998
09/16/1998CN2291516Y Universal ball joint rotary pump
09/15/1998US5807087 Stator assembly for a progressing cavity pump
09/09/1998CN1192510A Double module gear wheel rotor pump and power machine
09/01/1998US5800140 Compact scroll fluid device
09/01/1998US5800138 Extracorporeal blood pump for cardiac surgery
09/01/1998US5800135 Sliding vane pump using a drive shaft as a flow divider for enhanced oil circulation
09/01/1998US5799694 Steering control unit
08/1998
08/26/1998EP0860610A1 Internal gear machine, in particular internal gear pump
08/26/1998EP0859908A1 Fuel injection pump for internal combustion engines
08/26/1998CN1191275A Swing vane-type pump
08/26/1998CN1191274A Metal stator screw pump
08/25/1998US5797734 Positive displacement hydraulic pump
08/25/1998US5797732 Variable capacity pump having a pressure responsive relief valve arrangement
08/19/1998EP0859153A2 Rotor for use in a rotary pump
08/19/1998CN2288294Y Miniature peripheral pressurizing pump
08/19/1998CN1190704A Barrel cam pump
08/18/1998US5795143 Positive displacement pump apparatus
08/18/1998US5795142 Hydraulically balanced vane cell pump
08/13/1998WO1998035135A1 Screw conveyor for the transport of liquid substances and/or lumps of materials
08/13/1998DE19707119C1 High pressure pump
08/12/1998EP0857875A1 Fluid media delivery pump
08/12/1998EP0736128B1 Downhole motor for a drilling apparatus
08/06/1998DE19804207A1 Hydraulic circuit with fluid seal
08/05/1998EP0856666A1 Liquid delivery device, method of controlling such liquid delivery device, and liquid delivery pump
08/05/1998EP0708888B1 A pump with twin cylindrical impellers
08/04/1998US5788471 Spool valve wheel motor
07/1998
07/30/1998DE19703114A1 Hydraulic vane cell machine
07/28/1998US5785510 Gear pump having members with different hardnesses
07/28/1998US5785509 Wellbore motor system
07/23/1998DE19701276A1 Gear pump
07/22/1998EP0854292A1 Compressor with pressure relief valve
07/22/1998CN1188527A Positive-displacement rotary tilted plate type compressor with improved rotary tilted plate supporting device
07/21/1998US5782623 Internal toothed belt pump
07/21/1998US5782083 Drive systems
07/16/1998WO1998030801A1 Fluid pump with a flexible toothed belt
07/16/1998CA2300915A1 Fluid pump with a flexible toothed belt
07/15/1998EP0852674A1 Micromotor and micropump
07/14/1998US5779460 Progressive cavity pump with tamper-proof safety
07/14/1998US5779451 Power efficient multi-stage twin screw pump
07/08/1998EP0852306A1 Geared variable hydraulic motor
07/08/1998CN1186916A Pendulum rotary vane pump
07/01/1998EP0851123A2 Vane pump
07/01/1998CN1186173A Blade mechanism
06/1998
06/30/1998US5772419 Hydraulic machine comprising a gearwheel and annual gear having trochoid tooth sections
06/30/1998US5772417 Gear pump for conveying viscous fluid media and method of making same
06/30/1998US5772407 Reciprocating piston type compressor improved to distribute lubricating oil sufficiently during the starting phase of its operation
06/25/1998WO1998027339A1 Gear oil pump with internal rotor, comprising extensions of reniform suction and pressure elements
06/25/1998DE19650121C1 Hydraulic planetary piston motor
06/24/1998CN1185537A Motor-driven hydraulic pump and driving coupling for same
06/23/1998US5769618 Uniaxial eccentric screw pump having a flexible plastic shaft
06/18/1998WO1998026181A2 Gerotor pump for liquid media
06/18/1998DE19747786A1 Innenläuferzahnradölpumpe Internal rotor gear oil pump
06/18/1998DE19652158A1 Geared machine, e.g. pump or motor
06/17/1998EP0848165A2 Internal gear pump
06/17/1998CN1185197A Positive displacement hydraulic machine
06/11/1998WO1998025029A1 Motor pump unit
06/11/1998WO1998024722A2 Method and apparatus for accurately dispensing liquids and solids
06/10/1998EP0846861A1 Continuously variable annular gear pump
06/10/1998CN2283743Y Non-leakage gear pump
06/10/1998CN1184524A Positive displacement hydraulic machine
06/09/1998US5762485 Zirconia and zirconia composite ceramic shafts for gear micropumps and method of making same
06/09/1998US5762484 Gerotor type pump having its outer rotor shape derived from the inner rotor trochoid
06/03/1998EP0845597A1 Flexible drive shaft and drive shaft and rotor assembly
06/03/1998EP0845596A1 Internal gear pump with empty crescent space and spring biased sealing blades inserted in the teeth heads
06/03/1998EP0845080A1 Outlet pressure control for internal gear pump
06/03/1998EP0694126B1 Spinning pump for polyamides
06/02/1998US5759298 Gray cast iron system for scroll machines
06/02/1998US5759019 Filament fiber impregnated with a thermosetting resin
05/1998
05/27/1998EP0844397A1 Moineau pump
05/27/1998EP0795086B1 Vane pump
05/26/1998US5755566 Self-driving fluid pump
05/26/1998US5755565 Rotary pump having reinforcing wall in a passage
05/22/1998WO1998021479A1 Hollow wheel actuated internal geared wheel pump
05/22/1998WO1998021478A1 Twin-cylinder impeller pump
05/22/1998CA2242395A1 Twin-cylinder impeller pump
05/20/1998EP0843097A1 Fuel divider
05/20/1998EP0843094A1 Helical gear pump
05/20/1998EP0842364A1 Calculation and precision processing of cardiocle and expanded cardioid casing curved surfaces for eccentric rotor vane pumps
05/14/1998WO1998020259A2 Cascaded progressing cavity pump system
05/14/1998DE19646359A1 Lubricating oil pump controlled by volumetric degree of effect
05/13/1998EP0841484A1 Rotary pump
05/13/1998EP0841483A2 Gear pump with rotary sealing bar
05/07/1998WO1998019047A1 Compact scroll fluid device
05/07/1998DE19645206A1 Renovating and reconditioning an elastomer lining for an eccentric screw pump stator and process equipment
05/06/1998CN2280784Y Double-cylinder rolling-rotor type compressor
05/06/1998CN1180791A Gear mechanism device
05/05/1998USRE35780 Constant ratio post-mix beverage dispensing valve
04/1998
04/23/1998WO1998016744A1 A rotary machine
04/23/1998WO1998016743A1 A rotary machine
04/23/1998DE19653940C1 Sleeve for flexible drive shaft of eccentric screw pump
04/22/1998CN1179517A Steering control unit
04/15/1998EP0835798A1 Steering control unit
04/15/1998EP0835382A1 Electrohydraulic control arrangement for a rotary hydraulic motor
04/14/1998US5738505 Perfected twin-screw pump, particularly suitable for the pumping of biphase fluids in a submerged environment
04/14/1998US5738501 Internal gear pump
04/14/1998US5738500 Variable displacement vane pump having low actuation friction cam seal
04/14/1998CA2109126C Eccentric screw pump
04/08/1998CN2278103Y Eccentric bidirctional oil pump
04/07/1998US5735764 Hydraulic coupling for vehicle drivetrain
04/07/1998US5735436 Juice concentrate package for postmix dispenser
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