| Patents for F03C 4 - Oscillating-piston engines (772) |
|---|
| 01/07/2014 | US8622725 Mechanical compression ratio changing screw compressor |
| 12/25/2013 | CN103470443A Fluid energy collection and conversion device, energy transmission and output device and power generation equipment |
| 12/24/2013 | US8613610 Variable displacement pump |
| 12/10/2013 | US8602760 Vane compressor |
| 12/10/2013 | US8602759 Screw-type vacuum pump having overpressure openings |
| 12/10/2013 | US8602758 Indexed positive displacement rotary motion device |
| 12/10/2013 | US8602756 Scroll type compressor having an elastic member to suppress noise and reduce variations |
| 12/03/2013 | US8597007 Screw pump rotor and method of reducing slip flow |
| 12/03/2013 | US8597003 Direct control variable displacement vane pump |
| 11/26/2013 | US8591210 Scroll compressor having adjustable spacers |
| 11/21/2013 | WO2013172761A1 An arrangement for achieving a reciprocal motion in particular for a chain saw |
| 11/19/2013 | US8585384 Rotary pump including inner rotor and outer rotor having different axial size of an axial clearance |
| 11/19/2013 | US8585382 Compressor having capacity modulation assembly |
| 11/12/2013 | US8579615 Pivoting, hinged arc vane rotary compressor or expander |
| 11/12/2013 | US8579614 Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber |
| 11/12/2013 | US8579613 Vane pump and vapor leakage check system having the same |
| 11/05/2013 | US8573956 Multiple stage dry pump |
| 10/22/2013 | US8562319 Screw compressor having slide valve with inclined end face |
| 10/15/2013 | US8556922 Motor assembly for a powered surgical instrument |
| 10/15/2013 | US8556609 Geared hydraulic apparatus |
| 10/15/2013 | US8556608 Rotor drive mechanism and pump apparatus including the same |
| 10/15/2013 | US8556606 Water injection type screw fluid machine |
| 10/15/2013 | US8556605 Scroll compressor having a rotation inhibitor |
| 10/15/2013 | US8556603 Progressing cavity pump adapted for pumping of compressible fluids |
| 10/08/2013 | US8550797 Scroll compressor with improved back pressure force control function |
| 09/17/2013 | US8535029 Scroll type compressor having reinforced fixed scroll |
| 09/17/2013 | US8535028 Downhole positive displacement motor |
| 09/10/2013 | US8529235 Oscillating variable displacement ring pump |
| 09/10/2013 | US8529234 Water injection type screw fluid machine |
| 09/10/2013 | US8529233 Displacement machine with improved support |
| 09/03/2013 | US8523544 Three stage scroll vacuum pump |
| 08/27/2013 | US8517706 Non-eccentric engine |
| 08/27/2013 | US8517703 Compressor including valve assembly |
| 08/27/2013 | US8517702 Rotary compressor with enhanced sealing between mode switching device and chamber thereof |
| 08/20/2013 | US8512019 Screw compression apparatus |
| 08/20/2013 | US8512016 Positive-displacement dry pump |
| 08/14/2013 | DE112006003398B4 Brennkraftmaschine Internal combustion engine |
| 08/14/2013 | CN203130359U Oil distribution disc structure of cycloid hydraulic motor |
| 08/13/2013 | US8506269 Low noise type balance shaft module |
| 07/30/2013 | US8496457 Metering gear pump with integral flow indicator |
| 07/30/2013 | US8496456 Progressive cavity pump including inner and outer rotors and a wheel gear maintaining an interrelated speed ratio |
| 07/24/2013 | CN203081648U Cycloid hydraulic motor structure capable of measuring rotating speed |
| 07/23/2013 | US8491288 Geroller hydraulic motor with anti-cogging structure |
| 07/17/2013 | CN102506023B 泵 Pump |
| 07/16/2013 | US8485803 Scroll compressor comprising oil separating driving shaft |
| 07/09/2013 | US8480386 Vane for a single-vane vacuum pump |
| 07/02/2013 | US8475149 Scroll fluid machine having multiple discharge ports |
| 07/02/2013 | US8475148 Scroll compressor having through holes with a set depth |
| 06/11/2013 | US8459974 Six-blade biaxial rotary positive-displacement pump |
| 06/11/2013 | US8459973 Vane pump having an oil supply passage communicating with a gas passage in the stopping state |
| 06/11/2013 | US8459972 Bi-rotational hydraulic motor with optional case drain |
| 06/11/2013 | US8459969 Screw fluid machine |
| 06/04/2013 | US8454335 Valveless vane compressor |
| 06/04/2013 | US8454332 Method of assembling a refrigerating compressor |
| 05/29/2013 | CN101535633B Long life telescoping gear pumps and motors |
| 05/28/2013 | US8449277 Vane pump having a passage area ratio between an oil supply passage area and a gas passage area |
| 05/28/2013 | US8449275 Rotor drive mechanism, eccentric shaft sealing structure, and pump apparatus |
| 05/21/2013 | US8444406 Gear pump with reduced pressure pulsations on the pumping side |
| 05/21/2013 | US8444405 Overmolded rotor |
| 05/14/2013 | US8439660 Screw compressor having a second meshing body with at least one projection non-uniformly arranged with respect to the other projections in circumferential direction |
| 05/08/2013 | EP2588747A2 Interface assembly for space vehicles |
| 05/07/2013 | US8435020 Oil-free screw compressor |
| 04/23/2013 | US8425212 Positive displacement flowmeter and helical gear |
| 04/23/2013 | US8425211 Positive displacement machine according to the spiral principle |
| 04/16/2013 | US8419399 Roots type gear compressor with helical lobes having communication with discharge port |
| 04/16/2013 | US8419398 Method and apparatus for managing fluid flow within a screw pump system |
| 04/16/2013 | US8419397 Screw compressor |
| 04/16/2013 | US8419396 Vane pump and evaporative leak check system having the same |
| 04/16/2013 | US8419394 Hermetic compressor including a backflow preventing portion and refrigeration cycle device having the same |
| 04/16/2013 | US8419393 Compressor having bearing assembly |
| 04/10/2013 | CN202867084U Novel swing-cylinder hydraulic motor |
| 04/02/2013 | US8408888 Scroll compressor having relief ports to open first and second compression chambers |
| 03/28/2013 | DE10332984B4 Schwenkmotor für einen geteilten Stabilisator Swing motor for a split stabilizer |
| 03/26/2013 | US8403656 Vane pump consisting of a two-part stator |
| 03/26/2013 | US8403655 Scroll compressor having an allowable angle of rotation |
| 03/19/2013 | US8398388 Vane pump |
| 03/19/2013 | US8398387 Fluid machine and refrigeration cycle apparatus |
| 03/05/2013 | US8388328 Rotary pump and brake device in which rotary pump is provided |
| 02/26/2013 | US8382462 Vane pump with circulating oil supply passage |
| 02/19/2013 | US8376725 Planetary rotation machine |
| 02/19/2013 | US8376724 Gear pump enabling efficient pump capacity change |
| 02/13/2013 | CN202732215U Double-helix swing hydraulic motor with flow distribution and power distribution functions |
| 02/13/2013 | CN102926924A 液压马达 Hydraulic motor |
| 02/13/2013 | CN102926923A 液压马达 Hydraulic motor |
| 02/06/2013 | CN102230447B 液压马达 Hydraulic motor |
| 02/05/2013 | US8366425 Compressor slider, slider preform, scroll part, and compressor |
| 01/29/2013 | US8360762 Oil pump rotor |
| 01/22/2013 | US8356986 Compressor |
| 01/22/2013 | US8356585 Planetary rotary engine |
| 01/15/2013 | US8353692 Scroll type compressor |
| 01/08/2013 | US8348649 Single screw compressor and a method for processing a screw rotor |
| 01/08/2013 | US8348648 Single screw compressor |
| 01/08/2013 | US8348623 Apparatus and a method for regulation of the energy potential in a fluid column located within a pipeline |
| 01/02/2013 | CN101331326B Pressure medium powered rotary apparatus unit and system |
| 01/01/2013 | US8342828 Seal for a rotary vane pump |
| 01/01/2013 | US8342826 Variable capacity vane pump |
| 12/25/2012 | US8337185 Rotary compressor having an oil separation plate therein |
| 12/25/2012 | US8337184 Single screw compressor structure |
| 12/25/2012 | US8337182 Skinning of progressive cavity apparatus |
| 12/18/2012 | US8333576 Power steering pump having intake channels with enhanced flow characteristics and/or a pressure balancing fluid communication channel |