Patents
Sitemap › F03 - Machines or engines for liquids; Wind, spring, or weight motors; Producing mechanical power or a reactive propulsive thrust, not otherwise provided for › F03C - Positive-displacement engines driven by liquids › F03C 4 - Oscillating-piston engines
Patents for F03C 4 - Oscillating-piston engines (772)
12/2012
12/11/2012US8328545 Scroll fluid machine with stabilized orbiting scroll
12/11/2012US8328542 Positive displacement rotary components having main and gate rotors with axial flow inlets and outlets
12/06/2012DE102009016595B4 Hydromotor Hydraulic motor
12/04/2012US8323010 Expander-compressor unit
11/2012
11/28/2012CN102797623A Double-helix swing hydraulic motor with flow distribution and power distribution functions
11/13/2012US8308460 Scroll compressor
11/13/2012US8308459 Moineau pump
11/13/2012US8308458 Rotor assembly for multi-stage pump
11/06/2012US8303283 Power steering oil pump
11/06/2012US8303282 Gear pump for a power steering system
11/06/2012US8303280 Scroll type compressor comprising an Oldham ring having a reinforced pawls and a mirror plate having a concave recess for a movable scroll
11/06/2012US8303279 Injection tubes for injection of fluid into a scroll compressor
11/06/2012US8303278 Scroll compressor utilizing liquid or vapor injection
10/2012
10/30/2012US8297958 Optimized discharge port for scroll compressor with tip seals
10/23/2012US8292605 Rotary fluid device with multi-level phase shift control
10/17/2012EP2511530A2 Gear pump
10/16/2012US8287258 Positive displacement pump with impeller and method of manufacturing
10/16/2012US8287257 Oldham coupling
10/10/2012CN102094747B Oscillating cylinder type hydraulic motor
10/09/2012US8282371 Screw pump
10/09/2012US8281676 Transmission utilizing hypocycloid motion
10/04/2012US20120251339 Method and apparatus for oscillating a foil in a fluid
10/02/2012US8277208 Split discharge vane pump and fluid metering system therefor
10/02/2012US8277207 Oil supply method of two-stage screw compressor, two-stage screw compressor applying the method, and method of operating refrigerating machine having the compressor
09/2012
09/26/2012CN102691614A Double-stator swing hydraulic multi-speed motor
09/18/2012US8267678 Vane type vacuum pump
09/12/2012CN102667061A Internal combustion engine and supercharger
09/04/2012US8257071 Vane pump
09/04/2012US8257070 Seal apparatus of gear pump
09/04/2012US8257068 Cooling system for gerotor motor
09/04/2012US8257057 Variable displacement vane pump
08/2012
08/28/2012US8251684 Trochoid pump providing axial regulation of a driving shaft
08/28/2012US8251682 Multi stage rotary expander and refrigeration cycle apparatus with the same
08/22/2012CN101943638B Reliability test method and device of gripping tool rotating body of forestry crane
08/14/2012US8241023 Pumping unit with reinforcing ribs
08/14/2012US8241022 Rotation-preventing member and scroll compressor
08/09/2012WO2012106558A2 Method and system for wave energy conversion
08/07/2012US8235691 Dual displacement external gear pump
08/07/2012US8235690 Scroll compressor with improved oil separation from refrigerant gas
07/2012
07/31/2012US8231368 Multi-stage rotary compressor
07/24/2012US8226388 Oil-cooled screw compressor
07/24/2012US8226387 Scroll compressor including lubrication features
07/17/2012US8221103 Fluid motor having improved braking effect
07/17/2012US8221102 Hydraulic machine
07/10/2012US8215936 Screw compressor
07/10/2012US8215933 Scroll compressor and refrigerating machine having the same
07/10/2012US8215932 Long life telescoping gear pumps and motors
06/2012
06/26/2012US8206140 Revolving vane compressor
06/26/2012US8206139 Rotary compressor and refrigeration cycle equipment
06/20/2012CN102506023A Gear pump
06/19/2012US8202071 Motor-driven scroll type compressor
06/19/2012US8202070 Spherical positive displacement rotary machine
06/12/2012US8197241 Nanocomposite Moineau device
06/05/2012US8192187 Compressor with screw rotor and gate rotor
06/05/2012US8192185 Expander-compressor unit
05/2012
05/29/2012US8186983 Gas compressor having a check valve
05/29/2012US8186981 Scroll compressor having a spring member pressing an eccentric shaft onto a slide face of a slide bush
05/29/2012US8186980 Scroll-type fluid machine that reduces centrifugal force of an orbiting scroll
05/22/2012US8182253 Multi-cylinder rotary compressor and refrigeration cycle equipment
05/22/2012US8182251 Expander-compressor unit
05/22/2012US8182250 Gerotor motor and brake assembly
05/22/2012US8182249 Sealed type scroll compressor
05/15/2012US8177536 Rotary compressor having gate axially movable with respect to rotor
05/08/2012US8172561 Metal part and method of manufacturing metal part
05/08/2012US8172558 Rotary expander with discharge and introduction passages for working fluid
05/01/2012US8167594 Scroll compressor with materials to allow run-in
04/2012
04/24/2012US8162637 Rotary machine having frusto-conical elements
04/17/2012US8157553 Scroll compressor having a shifted gravity center
04/17/2012US8157551 Scroll compressor with back pressure pocket receiving discharge pressure fluid
04/17/2012US8157550 Scroll compressor having spiral bodies with seal projections
04/10/2012US8152505 Rotary expansible chamber device
04/10/2012US8152504 Method of operation of a spherical positive displacement rotary machine and devices for carrying out said method
04/10/2012US8152503 Baffle member for scroll compressors
04/10/2012US8152502 Scroll compressor having guide ring supporting and urging seal member
04/10/2012US8152501 Scroll compressor for preventing performance deterioration and variation due to gas leakage
04/10/2012US8152499 Eccentric screw pump
04/03/2012US8147230 Scroll compressor having rearwardly directed fluid inlet and outlet
04/03/2012US8147228 Progressing cavity pump/motor
03/2012
03/20/2012US8137085 Gear pump with slots in teeth to reduce cavitation
03/20/2012US8137084 Interlocking device for holding body and flange of machines using bean-shaped dowels
03/13/2012US8133045 Self-aligning pump rotor and methods
03/13/2012US8133044 Positive displacement capture device and method of balancing positive displacement capture devices
03/06/2012US8128389 Positive-displacement machine design (variants)
03/06/2012US8128386 Variable flow pumping system
02/2012
02/21/2012US8118579 Gear pump
02/14/2012US8113805 Rotary fluid-displacement assembly
02/14/2012US8113803 Lubricating system for aircraft drive
02/07/2012US8109747 Drive system having a variable output gerotor pump
02/07/2012US8109746 Progressing cavity pump/motor
01/2012
01/31/2012US8105059 Compressor with screw rotor and gate rotor with inclined gate rotor center axis
01/25/2012CN202125400U Hydraulic motor
01/24/2012US8100676 Rotor, a method for producing such rotor and a pump comprising such rotor
01/17/2012US8096797 Roots type gear compressor with helical lobes having feedback cavity
01/17/2012US8096792 Scroll type fluid machine with a rotation preventing cylindrical member
01/10/2012US8092199 Scroll compressor including a plurality of shoulder sections
01/05/2012WO2012003258A2 Interface assembly for space vehicles
01/04/2012CN101223363B Gear pump
01/03/2012US8087915 Rotary pump with vane support divided into two half shells
01/03/2012US8087914 Positive displacement pump with improved rotor design
01/03/2012US8087913 Gear pump with unequal gear teeth on drive and driven gear
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