| Patents for F03C 4 - Oscillating-piston engines (772) |
|---|
| 03/03/2015 | US8967987 Scroll compressor having at least one bypass hole |
| 02/17/2015 | US8956134 Fixed-vane positive displacement rotary devices |
| 02/17/2015 | US8956131 Scroll compressor |
| 02/04/2015 | CN104329217A 伸缩摆缸式液压马达及其偏心球面的加工方法 Telescopic hydraulic tilt cylinder motor and eccentric spherical processing methods |
| 02/03/2015 | US8944793 Flow and pressure ripple reduction with advance dual gear and bearing face cut |
| 02/03/2015 | US8944790 Compressor with cyclone and internal oil reservoir |
| 02/03/2015 | US8944789 Enhanced elastomeric stator insert via reinforcing agent distribution and orientation |
| 01/27/2015 | US8939742 Compressor with steel and cast iron sliding materials |
| 01/27/2015 | US8939741 Scroll compressor |
| 01/20/2015 | US8936449 Hermetic compressor and manufacturing method thereof |
| 01/20/2015 | US8936448 Rotary compressor having main cylinder chamber and sub-cylinder chamber with an end plate received therein |
| 01/20/2015 | US8936445 Reduced noise fluid pump |
| 01/13/2015 | US8932036 Compressor seal assembly |
| 12/30/2014 | US8920149 Single-screw compressor having an adjustment mechanism for adjusting a compression ratio of the compression chamber |
| 12/23/2014 | US8915725 Compressor in which a shaft center of a suction pipe is disposed to not correspond to a shaft center of a refrigerant suction passage of a stationary shaft and an upper end of the stationary shaft protrudes higher than a bottom of an accumulator chamber |
| 12/09/2014 | US8905738 Revolving vane expander having delivery conduit arranged to control working fluid flow |
| 12/09/2014 | US8905734 Compressor |
| 12/09/2014 | US8905733 Progressing cavity pump/motor |
| 12/02/2014 | US8899948 Fretting-corrosion-prevention oscillating vane type pump actuator |
| 12/02/2014 | US8899947 Compressor |
| 11/25/2014 | US8894393 Oil pump for vehicle |
| 11/18/2014 | US8888474 Downhole motors and pumps with asymmetric lobes |
| 11/11/2014 | US8882482 Compressor |
| 11/04/2014 | US8876504 Pump rotor combining and eccentrically disposing an inner and outer rotor |
| 10/28/2014 | US8870557 Rotor and hydraulic motor including the rotor |
| 10/28/2014 | US8870556 Oil pump |
| 10/21/2014 | US8864479 Multi-stage scroll machine |
| 10/14/2014 | US8858206 Pendulum-slide cell pump |
| 10/14/2014 | US8858205 Compressor having an inlet port formed to overlap with a roller and a cylinder-type rotor for compressing a refrigerant |
| 10/14/2014 | US8858204 Dry vacuum pump having multiple lubricant reservoirs |
| 10/14/2014 | US8858202 Rotary diaphragm pump |
| 10/07/2014 | US8851868 Scroll compressor including flow path with differing axial extents |
| 09/30/2014 | US8845310 Scroll compressor with cover covering driving shaft of driving motor |
| 09/23/2014 | US8840385 Positive displacement fluid pump |
| 09/23/2014 | US8840384 Scroll compressor capacity modulation with solenoid mounted outside a compressor shell |
| 09/16/2014 | US8834132 Apparatus having control valve and variable capacitance pump and hydraulic pressure circuit of internal combustion engine in which the same apparatus is used |
| 09/09/2014 | US8827669 Screw pump having varying pitches |
| 09/09/2014 | US8827667 Scroll compressor with cover covering driving shaft of driving motor |
| 09/02/2014 | US8821143 Vane rotary compressor |
| 09/02/2014 | US8821142 Pump or motor for liquid or gaseous media having an increased diameter shaft toward a slanted sliding plane |
| 09/02/2014 | US8821139 Balance plate assembly for a fluid device |
| 09/02/2014 | US8821138 Gerotor apparatus for a quasi-isothermal Brayton cycle engine |
| 08/26/2014 | US8814546 Compressor |
| 08/19/2014 | US8807975 Rotary compressor having gate axially movable with respect to rotor |
| 08/19/2014 | US8807974 Split discharge vane pump and fluid metering system therefor |
| 08/19/2014 | US8807972 Housingless positive displacement pump assembly |
| 08/13/2014 | CN102691614B 双定子摆动液压多速马达 Dual hydraulic multi-speed motor stator swing |
| 08/12/2014 | US8801413 Helical gear pump |
| 08/05/2014 | US8794944 Screw spindle machine and method of manufacturing the same |
| 08/05/2014 | US8794942 Vacuum pump with connection nipple for connection between a rotor shaft and a drive |
| 08/05/2014 | US8794941 Compressor with liquid injection cooling |
| 08/05/2014 | US8794940 Scroll-type refrigerator compressor |
| 07/29/2014 | US8790097 Refrigerant compressor and heat pump apparatus |
| 07/22/2014 | US8784086 Rotary piston steam engine with rotary variable inlet-cut-off valve |
| 07/01/2014 | US8764424 Screw pump with field refurbishment provisions |
| 07/01/2014 | US8764423 Scroll compressor with fluid injection feature |
| 07/01/2014 | US8764420 Eccentric-screw pump with replaceable rotor and stator |
| 06/24/2014 | US8757993 Gear pump with fluid communication portion |
| 06/24/2014 | US8757992 Air compression device |
| 06/17/2014 | US8753099 Sealing system for gerotor apparatus |
| 06/17/2014 | US8753098 Refrigerant compressor |
| 06/10/2014 | US8747091 Water injection type screw compressor |
| 06/10/2014 | US8747087 Scroll pump having pockets formed in an axial end face of a scroll wall |
| 06/10/2014 | US8747086 Scroll compressor |
| 06/03/2014 | US8740594 Scroll compressor including seal member and guide ring |
| 05/27/2014 | US8734142 Rotation preventing member of a scroll compressor |
| 05/27/2014 | US8734141 Stator/rotor assemblies having enhanced performance |
| 05/13/2014 | US8721309 Airtight compressor |
| 05/07/2014 | CN103775281A 压力油膜密封摆叶马达系统 Pressure seal swing film leaves the motor system |
| 05/06/2014 | US8714950 Scroll compressor having tip seals of different lengths having different thickness or widths |
| 04/29/2014 | US8708677 Screw compressor having injection having injection mechanism that injects oil or refrigerant toward a starting end of an extending direction of a helical groove of the female rotor or the male rotor |
| 04/29/2014 | US8708676 Drive system having a variable output gerotor pump |
| 04/22/2014 | US8702409 Screw compressor having male and female rotors with profiles generated by enveloping a rack profile |
| 04/22/2014 | US8702408 Slide for use in a screw compressor |
| 04/22/2014 | US8702407 Multistage roots vacuum pump having different tip radius and meshing clearance from inlet stage to exhaust stage |
| 04/22/2014 | US8702406 Compressor alignment method and device |
| 04/09/2014 | CN203532155U Fluid energy collection and conversion device and energy transfer and output device and generating equipment |
| 04/09/2014 | CN203532154U Fluid energy collection and conversion device and energy transfer and output device and generating equipment |
| 04/09/2014 | CN103711638A Pressure oil film sealing swing-blade motor |
| 04/08/2014 | US8690555 Two-stage rotary expander, expander-compressor unit, and refrigeration cycle apparatus |
| 04/01/2014 | US8684715 Vane machine |
| 04/01/2014 | US8684714 Internal orbital engine |
| 04/01/2014 | US8684713 Rotor type pump |
| 03/25/2014 | US8678798 Rotary pump device having seal mechanism which includes resin member and reinforcing ring in hollow portion of resin member |
| 03/25/2014 | US8678797 Variable displacement scroll compressor having first and second compression chambers that communicate with each other |
| 03/25/2014 | US8678795 Stator of a gerotor device and a method for manufacturing roller pockets in a stator of a gerotor device |
| 03/18/2014 | US8672658 Vane pump with improved rotor and vane extension ring |
| 03/11/2014 | US8668478 Compressor having a shutdown valve |
| 03/04/2014 | US8662870 Integrated pump for compressible fluids |
| 02/18/2014 | US8651844 Hybrid pump for delivering a liquid pump medium |
| 02/11/2014 | US8647089 Dual rotor pump |
| 02/11/2014 | US8647087 Cooling system for gerotor motor |
| 02/11/2014 | US8647085 Scroll fluid machine having a communication passage between an inner periphery of lip seal and an outer periphery of drive shaft or ring |
| 02/11/2014 | US8647084 Cylinder dividing mechanism of a pneumatic tool |
| 02/04/2014 | US8641393 Thermally compensated scroll machine |
| 02/04/2014 | US8641392 Scroll compressor bodies with scroll tip seals and extended thrust region |
| 01/28/2014 | US8636488 Hydraulic motor or pump |
| 01/21/2014 | US8632323 Internal gear pump rotor, and internal gear pump using the rotor |
| 01/14/2014 | US8628314 Scroll compressor including a communication section between the suction chamber and the supply flow path |
| 01/14/2014 | US8628312 Compressor including anti-rotation washer and method of assembly |