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)
12/2012
12/04/2012US8322323 Fluid system for oscillating-piston engines
12/01/2012CA2778461A1 Tandem progressive cavity pumps
11/2012
11/29/2012WO2012161574A1 Pump, pump system and method for pumping a medium
11/29/2012WO2011134449A3 Hydraulic transport device and electrohydraulic control module
11/29/2012WO2011073787A3 Cam bearing flow control for rotating cam ring vane pump
11/29/2012US20120297818 Compressor and refrigeration device
11/29/2012DE202012011105U1 Zahnrad und Zahnradpumpe Gear and gear pump
11/29/2012DE112010004366T5 Statoren für Bohrlochmotoren, Verfahren für ihre Herstellung und Bohrlochmotoren, die sieenthalten Stators for downhole motors, processes for their preparation and downhole motors, the sieenthalten
11/29/2012DE102009049311B4 Schraubenspindelmaschine und Verfahren zu ihrer Herstellung Screw machine and process for their preparation
11/28/2012CN202560556U Dual gear oil pump
11/28/2012CN202560555U Minitype gear pump provided with one-way valve
11/28/2012CN202560554U Fluid pressure and mechanical energy converter
11/28/2012CN1875189B Double or multiple pump
11/28/2012CN102803731A Method and apparatus for managing fluid flow within a screw pump system
11/28/2012CN102797674A Variable displacement pump
11/28/2012CN102797673A Embedded combined tooth-shaped screw pump
11/28/2012CN102795325A Water spray propulsion unit for ship
11/28/2012CN102062088B Two-screw multiphase pump device suitable for working condition with high air void
11/27/2012CA2535870C Eccentric screw pump equipped with erosion-resistant rotor
11/22/2012WO2012155500A1 Variable pump, engine and automobile
11/22/2012WO2012045535A3 Internal gear pump having an integrated electric motor
11/22/2012WO2011147638A3 Internal gear pump
11/22/2012WO2011129776A4 Gear pump with continuous variable output flow rate
11/22/2012DE102011101648A1 Screw machine e.g. double-flow screw pump, for pumping of e.g. fluid, has spindles accommodated with profile packages in casing, where fixed gap is formed among spindles and casing, and gap adjustment unit adjusting gap
11/21/2012EP2524143A2 Formed seal ring for a liquid gas separating element
11/21/2012EP2524111A2 Vane pump
11/21/2012CN202545244U Servo double pump
11/21/2012CN202545243U High-pressure gear pump
11/21/2012CN202545242U Gear pump
11/21/2012CN202545241U Gear type oil-gas separation combined pump
11/21/2012CN202545240U Linear conjugated internal gear pump with separated gear cylinder
11/21/2012CN202545239U Foam transport pump
11/21/2012CN102788013A Variable pump, engine and automobile
11/21/2012CN102788012A Fluid pump with screw spiral mechanism, fluid power machine and internal and external combustion jet engine
11/21/2012CN102787968A Mechanical structure force acting machine with atomic structure strength as energy source
11/21/2012CN102400906B Gear pump for food processing
11/21/2012CN101846237B Lubricating pump and special pump shaft thereof
11/20/2012US8313318 Compressor having capacity modulation system
11/20/2012US8313317 Scroll fluid machine with cold forged eccentric crankshaft
11/17/2012CA2740567A1 Downhole pump apparatus having decoupleable isolation plug
11/15/2012WO2012151699A1 Spherical involute gear coupling
11/15/2012WO2012041283A3 Vane cell pump
11/14/2012CN202531419U Ultrafiltration concentration device for insulin production
11/14/2012CN202531418U Seal compensating three-space rotor pump for pressure airbag
11/14/2012CN202531417U Double-shaft gear pump
11/14/2012CN102782327A 叶片泵 Vane pump
11/14/2012CN102782326A Axial sealing element for an internal gear pump
11/14/2012CN102777382A Scroll type fluid machine
11/14/2012CN102777380A Driving device for oil pump
11/14/2012CN102777377A Slide plate type hydraulic pump or motor
11/14/2012CN102776434A Cast iron alloy for manufacturing stator of automobile steering pump
11/14/2012CN101655088B Self-priming vane pump
11/13/2012US8308464 Bearing and liquid cooling type screw compressor
11/13/2012US8308463 Resin screw rotor molded to a metallic shaft
11/13/2012US8308461 Scroll compressor with improved rotation prevention mechanism
11/13/2012US8308460 Scroll compressor
11/13/2012US8308459 Moineau pump
11/13/2012US8308458 Rotor assembly for multi-stage pump
11/08/2012WO2012122955A3 Planetary rotation-type rotation device, engine, pneumatic motor, and compressor
11/08/2012WO2011128707A3 Rotary vane pump
11/08/2012DE102011075423A1 Gear pump e.g. internal gear pump for delivering fuel into fuel injection system of internal combustion engine, has internally toothed ring aligned with externally toothed gear by forming line contact between mold drafts
11/08/2012DE102011075415A1 Gear pump e.g. outer gear wheel pump, for use in fuel injection system of Otto engine to convey fuel from low pressure region into high pressure region, has axially displaceable sealing plates resiliently prestressed in direction of chamber
11/07/2012CN202520547U Input transmission stable and high-pressure gear pump
11/07/2012CN202520546U Oil pump driven by direct-current brushless motor
11/07/2012CN202520545U Concave-convex wheel rotary capacity changing pump
11/07/2012CN102767516A Compact structure type gear pump
11/07/2012CN102767515A Double-row external gear pump
11/07/2012CN102767514A Gear pump
11/06/2012US8303283 Power steering oil pump
11/06/2012US8303282 Gear pump for a power steering system
11/06/2012US8303281 Gear type performance oil pump
11/06/2012US8303279 Injection tubes for injection of fluid into a scroll compressor
11/06/2012US8303277 Blending pump assembly
11/01/2012WO2012109302A3 Lubricant control valve for a screw compressor
11/01/2012US20120275945 Vane pump
10/2012
10/31/2012EP2516861A2 Supercharger timing gear oil pump
10/31/2012EP2516860A2 Hydraulic control
10/31/2012EP2516859A2 A geared hydraulic machine
10/31/2012DE102011100105A1 Hydrostatic internal gear machine has housing, in which ring gear is rotatable with internal gear and pinion is rotatable with external gear, where gears stand in interference in engagement area
10/31/2012CN202510364U Rotor of power assisted steering pump
10/31/2012CN202510360U Roller oil pump
10/31/2012CN202510359U Hydraulic combined gear pump
10/31/2012CN202510358U Gear pump
10/31/2012CN102762866A Compressor including valve assembly
10/30/2012US8297958 Optimized discharge port for scroll compressor with tip seals
10/30/2012US8297253 Rotary piston engine
10/30/2012US8297252 Rotary one cycle internal combustion engine
10/30/2012US8297239 Gyroscopic rotary engine
10/26/2012WO2012142714A1 Rotors formed using involute curves
10/26/2012CA2833593A1 Rotors formed using involute curves
10/25/2012DE10202685B4 Umlaufpumpe mit höherem Abgabedruck und Bremsvorrichtung mit derselben Circulation pump with higher discharge pressure and braking device having the same
10/25/2012DE102011017492A1 Gear pump for conveying fluid e.g. diesel to combustion engine mounted in motor car, has externally toothed gear that is mounted on bearing pin formed with inlet through which fluid is introduced in interior of gear pump housing
10/25/2012DE102011007783A1 Gear pump for conveying fluids, such as fuel in fuel injection system of internal combustion engine, has external gear and ring, where predetermined axis of another axis is defined by eccentricity of bearing points
10/24/2012EP2514974A1 Gear pump
10/24/2012EP2513482A2 Cam bearing flow control for rotating cam ring vane pump
10/24/2012CN202500768U Magnetic-drive sliding vane pump for liquefied natural gas transportation
10/24/2012CN202500767U Composite oil supply pump for torque converter
10/24/2012CN102753826A Pump arrangement
10/24/2012CN102748279A Elliptic-rotating sliding vane pump
10/24/2012CN102748278A Vane pump/motor
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