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)
04/2003
04/17/2003US20030072666 Support apparatus for movable member and pump apparatus
04/17/2003US20030072665 Inverse toothed rotor set
04/17/2003US20030070879 Submerged electric fluid pump
04/17/2003US20030070429 Hydrostatic transmission
04/16/2003EP1302704A2 Submerged electric fluid pump
04/16/2003EP1302109A1 Twin vane concentric pump
04/16/2003EP1301713A2 Gear pump including ceramic gears and seal
04/16/2003CN2545398Y Hydraulic pump
04/16/2003CN2545397Y Rotor of cam pump
04/16/2003CN2545396Y Ring diaphragm rotor pump
04/16/2003CN2545395Y Prestretched ring diaphragm rotor pump
04/16/2003CN1411540A Shaft drive and internal geared wheels for drive of this type
04/16/2003CN1411537A Inverse toothed rotor set
04/16/2003CN1410678A 变量泵 Variable pump
04/16/2003CN1105829C Blade machinery
04/15/2003US6547546 Rotary machine
04/15/2003US6547542 Series for compressed air motors with torque which can be theoretically output in a varied manner and a method for producing the individual compressed air motors of said series
04/10/2003WO2003030296A2 Rotor for vane pump
04/10/2003WO2003029660A1 Velocity-regulating hydraulic valve device
04/10/2003WO2003029652A1 Hydraulic motors and pumps with engineered surfaces
04/10/2003WO2002091028A3 Devices employing colloidal-sized particles
04/10/2003DE20300030U1 Fluid controlled valve for displacement pump in lubricating oil circuit has throttling gap formed in flow path of control fluid upstream or downstream of control inlet in valve housing
04/09/2003EP1299644A1 Hydraulic transformer
04/09/2003EP1299643A1 Positive displacement pump
04/09/2003CN1105242C 流体泵 Fluid pump
04/09/2003CN1105224C Positive-desplacement piston mechanism of rotary piston structure
04/08/2003USRE38064 Machine and method for forming arched roof vertical wall self supporting metal buildings
04/08/2003US6544021 Oil pump
04/08/2003US6544019 Pump with magnetic clutch
04/08/2003US6544018 Hydraulic motor having multiple speed ratio capability
04/08/2003US6544015 Worm for an eccentric screw pump or a subsurface drilling motor
04/08/2003US6544013 Oil pump apparatus
04/08/2003US6544008 Internal vent for reducing seal pressure in prelubrication pump assembly
04/08/2003US6543132 Methods of making mud motors
04/03/2003WO2002097273A3 Pump having a temperature-dependent delivery volume
04/03/2003US20030063990 Scroll fluid machine
04/03/2003US20030063980 Hydraulic motors and pumps with engineered surfaces
04/02/2003EP1298323A2 Variable displacement pump
04/01/2003US6540637 Toothed rotor set
04/01/2003US6540493 Series for gear pumps with differing capacities and method for manufacturing the individual gear pump of the series
03/2003
03/27/2003US20030059330 Method and apparatus for timing rotors in a rotary lobe pump
03/27/2003US20030059329 Fluid transfer machine with drive shaft lubrication and cooling
03/27/2003US20030059312 Variable displacement pump
03/26/2003EP1295036A1 Gear pump
03/26/2003CN2541629Y Rotor of rotary piston pump
03/25/2003US6537048 Pump body for a medical gear pump
03/25/2003US6537047 Reversible variable displacement hydraulic pump and motor
03/25/2003US6537046 Device for reducing the axial force load of a fluid supply pump
03/25/2003US6537038 Supply pump having a variable drive gear unit
03/20/2003WO2003023228A1 Variable-delivery vane pump
03/20/2003WO2002081921B1 Variable displacement pump having a rotating cam ring
03/20/2003WO2002077416A3 Center driven pressure clamped pump
03/20/2003US20030053923 Bearing arrangement
03/19/2003EP1293673A2 Vane pump
03/19/2003EP1293672A1 Reverse-running pump
03/19/2003EP1292773A1 Pump
03/19/2003EP1292772A1 Pump
03/19/2003EP1292771A1 Pump
03/19/2003EP1292770A2 Adjustable fit progressive cavity pump/motor apparatus and method
03/19/2003EP1292769A1 Pump
03/19/2003EP1292541A1 Pumping arrangement for a household water purifier
03/19/2003EP1117932B1 Gear pump for pumping highly viscous fluids
03/19/2003CN1403712A Isowidth-curve double-stator roller pump
03/19/2003CN1403711A Variable desplacement pump
03/19/2003CN1403700A Fuel-injection pump with flow-control fuel path used for fuel lubrication
03/18/2003US6533556 Pressure balanced hydraulic pumps
03/13/2003US20030049143 Integrated pump
03/13/2003DE9321656U1 Reversible, internally toothed gear pump or motor - has sectioned filling piece between gear and pinion with radially adjustable seals and seal between high and low pressure sides
03/12/2003EP1053400A4 Hydraulic motor lubrication path
03/12/2003EP0891489B1 Gear oil pump with internal rotor, comprising extensions of reniform suction and pressure elements
03/12/2003CN2539853Y Multilayer artificial fibre spinning pump
03/12/2003CN1103001C Hydraulic machine
03/11/2003US6530752 Variable displacement pump
03/11/2003US6530750 Control for progressive cavity pump
03/11/2003US6530365 Fluid displacement pump with backpressure stop
03/06/2003WO2003019009A1 Fluid displacement pump with backpressure stop
03/06/2003US20030044300 Vane pump
03/06/2003US20030044299 Fluid displacement apparatus and method
03/06/2003US20030044288 Fuel injection pump having throttled fuel path for fuel lubrication
03/05/2003EP1288488A1 Fuel injection pump having throttled fuel path for fuel lubrication
03/05/2003EP0910746B1 Vane-cell pump
03/05/2003CN2538980Y Toothed screw
03/05/2003CN2538979Y Improved gear pump
03/05/2003CN2538978Y Irregularly formed epicyclic rotor type oil pump
03/04/2003US6527530 Gear-wheel pump, in particular for a high-pressure fuel pump
03/04/2003US6527525 Hydristor control means
02/2003
02/27/2003WO2003016721A1 Liquid and gas transfer device
02/27/2003WO2003016720A1 Gear pump
02/27/2003US20030039551 Devices and methods for noise suppression in pumps
02/27/2003US20030037759 Pumping device for a lubricant of an internal-combustion engine
02/26/2003EP1286086A2 Hydrostatic transmission
02/26/2003EP0925452B9 Screw rotor set
02/26/2003CN2537836Y Multifunctional vane pump and vane motor
02/26/2003CN2537835Y 双螺杆泵 Twin-screw pump
02/26/2003CN1102204C Floating seal for sealed star gerotor
02/25/2003US6524088 Gear pump having a bearing with a temperature adjusting medium passage
02/25/2003US6524087 Hydrostatic planetary rotation machine having an orbiting rotary valve
02/21/2003CA2398866A1 Hydrostatic transmission
02/20/2003WO2003014549A1 A system for the construction of pumps, compressors, and motor engines, formed by a rotary chamber and pistons which are driven in the same direction at varying velocities alternatively opposite to each other, inside a fixed open or closed structure
02/20/2003US20030035742 Method and apparatus for providing a hydraulic transmission pump assembly having a differential actuation
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