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)
11/2003
11/13/2003WO2003093694A1 An hydraulic transmission system utilizing a planetary gear pump
11/13/2003WO2003093677A2 Hydraulic motor for use in high-pressure environment
11/13/2003US20030212153 Internally generated rotor set for low viscosity and abrasive metering applications
11/13/2003DE10241753C1 Stator for eccentric screw pump has outside of hollow body defining rotor space enclosed by manrle assembled from linked segments
11/13/2003CA2481950A1 Hydraulic motor for use in high-pressure environment
11/12/2003EP1360416A1 Device for axially conveying fluids
11/12/2003EP1144867B1 Pump
11/11/2003US6644939 Method and apparatus for providing a hydraulic transmission pump assembly having a differential actuation
11/11/2003US6644572 Laminar polyolefine plastic material recycling installation
11/11/2003US6643927 Pump equipment with plural rotary pumps and method for assembling same
11/06/2003WO2003091545A1 Hydraulic motor
11/06/2003WO2003091543A1 Gerotor type machine
11/05/2003EP1358006A1 Dividing device
11/05/2003CN2584879Y Rotary-vane constant delivery pump
11/05/2003CN2584878Y Gear pump
11/05/2003CN2584877Y Double-flow Quimby pump
11/05/2003CN2584876Y Underground gear pump
11/05/2003CN1453477A Hydraulic pump apparatus
11/05/2003CN1453476A Refrigerating pump
11/05/2003CN1126871C Compressor assembly with positive displacement pump capable of rotating oppositely
11/05/2003CN1126870C Rotary piston pump
11/04/2003US6641380 Vane pump having a pressure plate and a shaft seal
11/04/2003US6641372 Dual discharge hydraulic pump and system therefor
10/2003
10/30/2003US20030202896 Hydraulic motor with a separate spool valve
10/30/2003US20030202895 Automatic wear indicator for sliding vane vacuum and gas pressure pumps
10/30/2003US20030202891 Refrigerant pump
10/30/2003US20030202888 Pump apparatus
10/30/2003US20030202887 Vent for reducing seal pressure in pump assembly
10/30/2003US20030202725 Hydraulic motor for use in high-pressure environment
10/30/2003DE10204103C1 Hydraulikmotor Hydraulic motor
10/29/2003EP1357290A2 Pump apparatus with bypass flow control valve
10/29/2003EP1356208A1 Pump system comprising a hydraulic pump, particularly for a steering system
10/29/2003EP1210519B1 Gear pump with a drive and a hydraulic tank
10/29/2003CN2583398Y Oil pump
10/28/2003US6638041 Copper sulfate solution forms a film on addendum surfaces of a drive gear and a driven gear so that burning and wearing in the sliding portion of this member can be prevented
10/28/2003US6638030 Oil free screw compressor
10/28/2003US6637313 Rotary pump
10/23/2003WO2003029660A9 Velocity-regulating hydraulic valve device
10/23/2003US20030196697 Relief valve
10/23/2003DE10200968C1 Hydraulikmotor Hydraulic motor
10/22/2003EP1354135A2 Miniature precision bearings for minisystems or microsystems and method for assembling such systems
10/22/2003EP0879358B1 Rotary piston regulating device
10/22/2003CN2581728Y Shuttle wheel rotation type pump
10/21/2003US6634876 Vane pump having a vane guide
10/21/2003US6634865 Vane pump with undervane feed
10/21/2003US6634459 Accessory drive and particle trap
10/16/2003US20030194339 Stator tube removal and installation device
10/16/2003US20030192184 Optimized fiber reinforced liner material for positive displacement drilling motors
10/15/2003EP1352184A1 Lubication pump for inter-axle differential
10/15/2003CN2580146Y Gear pump
10/15/2003CN1448637A All-teeth positive-displacement apparatus
10/14/2003US6632145 Fluid displacement pump with backpressure stop
10/14/2003CA2350294C Apparatus for encrusting a filling material
10/09/2003WO2003083311A2 Motor pump
10/09/2003WO2003083306A1 Internal gear pump with recesses on the gear bearing surfaces
10/09/2003WO2003083265A1 Sliding face non-contact high-gastightness seal-less rotary pump
10/08/2003EP1350957A1 Variable displacement pump
10/08/2003EP0894195B1 Progressive cavity pumps using composite materials
10/08/2003CN2578563Y Double screw pumps
10/08/2003CN2578562Y Oil pump
10/08/2003CN1447028A Rotation impeller blade pump
10/07/2003US6629829 Vane type rotary machine
09/2003
09/30/2003US6626643 Twin vane pump apparatus for dispensing meat products
09/30/2003CA2275789C Positive displacement pump
09/25/2003WO2003078843A1 Vane pump
09/25/2003WO2003030296A3 Rotor for vane pump
09/25/2003US20030180170 Reverse-running pump
09/24/2003CN2575333Y Built-in motor type double-air inlet centrifugal fan
09/24/2003CN2575332Y Wind compressor
09/24/2003CN2575331Y Spiale horizontal unit construction water pump capable of using B3 type motor
09/24/2003CN2575330Y Shaft arc pump
09/23/2003US6623673 Method for the metered discharge of a string of a viscous medium and feedpump for discharging a string of a viscous medium
09/23/2003US6623262 Method of reducing system pressure pulsation for positive displacement pumps
09/23/2003US6623260 Multiplate hydraulic motor valve
09/23/2003US6622381 Method of manipulating a pump
09/17/2003EP1344936A1 Fibre reinforced liner material for moineau-type motor and method of forming
09/17/2003EP1343948A4 Hydristor control means
09/17/2003EP1343948A2 Hydristor control means
09/17/2003CN2573727Y High-efficiency reciprocating viscous oil rotor pump
09/17/2003CN1442615A Clearance of ring shaped gear wheel machine
09/17/2003CN1442614A 油泵转子 Pump rotor
09/16/2003US6619939 Rotary pump
09/16/2003US6619937 Hydraulic machine
09/16/2003US6619928 Variable displacement pump
09/16/2003US6619761 Pump equipment with plural rotary pumps and method for assembling same
09/12/2003WO2003074880A1 Double compressor having planetary rotors
09/12/2003WO2003074878A1 Hydraulic system comprising a variable displacement pump
09/12/2003WO2003074877A1 System for controlling a hydraulic force pump
09/12/2003WO2003074875A1 Gerotor pump for vehicle transmission system
09/12/2003WO2003074874A1 Hydraulic machine
09/10/2003EP1040275B1 Method of making stators for moineau pumps
09/10/2003CN2572048Y Efficient rotor type thickened oil pump
09/10/2003CN1120935C Rotary pump with hydraulic vane actuation
09/09/2003US6617367 Inner rotor having a number of radially projecting cylindrical tooth members engaging a conjugate internally toothed outer rotor that has one more tooth than there are tooth members on the inner rotor; preparing polyurethane foams
09/09/2003US6616433 Fluid pump
09/09/2003US6616432 Fluid pump mechanism for use in existing helical gearsets
09/09/2003US6616419 Variable displacement pump
09/04/2003US20030165392 Oil pump rotor
09/03/2003EP1340915A2 Pump device and reservoir
09/03/2003EP1340914A2 Internal gear oil pump
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