| Patents for F01B 7 - Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders (730) |
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| 11/10/2010 | CN101883912A Electromagnetic engine |
| 11/10/2010 | CN101094970B Dynamic system for refrigeration equipment |
| 11/02/2010 | US7823803 Integrated breakaway cylinder and method for constructing a boom assembly |
| 11/02/2010 | US7823382 Active material actuator with modulated movement |
| 10/20/2010 | EP2240674A2 Two-stroke opposite radial rotary-piston engine |
| 10/14/2010 | WO2010115382A1 Combustion engine |
| 08/26/2010 | WO2010096187A2 Multi-cylinder opposed piston engines |
| 08/24/2010 | US7779795 Valve system for opposed piston engines |
| 06/30/2010 | EP2201219A1 Electromagnetic engine |
| 06/30/2010 | CN101765699A Internal combustion engines |
| 06/17/2010 | DE102006031984B4 Verbrennungsmotor Combustion engine |
| 06/08/2010 | US7730826 Swashplate type axial piston device having apparatus for providing three operating displacements |
| 05/25/2010 | US7721686 Method and system for controlling a free-piston energy converter |
| 05/19/2010 | CN101709680A Air jet engine using piston engine as air compressor and application thereof |
| 04/27/2010 | CA2580587C Engine |
| 04/22/2010 | US20100095836 Slip Seal Diaphragm For Spring Brake Actuator |
| 04/07/2010 | EP2171211A2 Internal combustion engines |
| 04/01/2010 | DE102008062996B3 Method for converting thermal energy into mechanical work or vice versa in e.g. internal combustion engine, involves guiding thermodynamic machine to initial condition during conversion of mechanical work into thermal energy |
| 03/30/2010 | US7685927 Hydraulic synchronizing cylinder |
| 03/16/2010 | US7677154 Control unit for rotor blade adjustment |
| 02/24/2010 | CN101655013A Double-piston serial direct-push engine and application thereof |
| 12/23/2009 | WO2009152592A1 Internal combustion engine with working, piston and control piston |
| 12/02/2009 | CN101592077A Internal combustion engine |
| 11/19/2009 | US20090282971 Pneumatic actuator |
| 10/20/2009 | US7603942 Synchronization cylinder having chambers with different volumes |
| 10/14/2009 | EP2108798A2 Abutting or opposite piston internal combustion engine for go-kart, motorcycle, motor vehicle, nautical and areonautical use |
| 09/08/2009 | US7584726 Two-stroke opposite radial rotary-piston engine |
| 09/08/2009 | US7584725 Internal combustion engine |
| 08/25/2009 | US7578267 Internal combustion engine |
| 08/12/2009 | EP2088283A1 Reciprocating rotary internal combustion engine |
| 08/04/2009 | US7568453 Two-stroke engine with variable compression |
| 07/30/2009 | DE19882790B4 Radialkolben-Hydraulikmotor Radial piston hydraulic motor |
| 07/29/2009 | CN101495714A Combustion engine with self-ignition of air-and-fuel mixture |
| 07/02/2009 | WO2009053621A3 Internal combustion engine with a variable-geometry combustion chamber |
| 07/02/2009 | WO2009033191A3 Compressed fluid motor |
| 07/02/2009 | US20090165754 Two-stroke Opposed Cylinder Internal Combustion Engine with Integrated Positive Displacement Supercharger and Regenerator. |
| 07/02/2009 | US20090165640 Booster pump and low-temperature-fluid storage tank having the same |
| 05/20/2009 | EP2060737A1 Cylinder assembly for a reciprocating compressor combustion machine and reciprocating compressor combustion machine |
| 05/13/2009 | EP1504176A4 Internal combustion engine |
| 04/14/2009 | US7516723 Double piston cycle engine |
| 04/09/2009 | WO2009045521A1 Electromagnetic engine |
| 04/09/2009 | US20090090334 Opposed piston electromagnetic engine |
| 04/07/2009 | US7513341 Combined service brake and spring-loaded brake cylinder with internal ventilation |
| 04/07/2009 | US7513224 Split-cycle aircraft engine |
| 04/02/2009 | WO2008149061A3 Internal combustion engines |
| 04/01/2009 | EP2041433A1 Pumping machine or compressor and systems using such units |
| 03/24/2009 | US7506573 Mid-power spring brake actuator having fuse-collar design for safety |
| 03/17/2009 | US7503290 Two-stroke internal combustion engine supplied with gasoline, diesel fuel or other conventional fuel |
| 03/12/2009 | WO2009033191A2 Compressed fluid motor |
| 02/26/2009 | WO2009024608A1 Asynchronous electrical generator with a free-piston motor |
| 01/13/2009 | US7475538 Digital Hydraulic system |
| 01/08/2009 | DE202006020546U1 Gegenkolbenmotoren mit Schiebebüchsen und Gaswechselsteuerung Opposed-piston engines with sliding sleeves and gas exchange control |
| 12/30/2008 | US7469662 Homogeneous charge compression ignition engine with combustion phasing |
| 12/17/2008 | CN101326351A Engine arrangement |
| 12/16/2008 | US7464548 Shape memory alloy linear actuator |
| 12/11/2008 | WO2008149061A2 Internal combustion engines |
| 12/10/2008 | CN101321927A Internal combustion engine |
| 11/18/2008 | US7451689 Combined service brake and spring brake cylinder assembly |
| 10/23/2008 | WO2008124877A1 A magnetic drive fluid pump |
| 10/22/2008 | EP1499799B1 Rotary piston machine |
| 10/15/2008 | EP1980731A2 Internal combustion engine with a single crankshaft and having opposed cylinders with opposed pistons |
| 10/14/2008 | US7434550 Internal combustion engine |
| 10/14/2008 | US7434549 Opposed double piston internal combustion engine |
| 10/07/2008 | CA2458698C Improved asymmetrically accelerated vibrator for feeding materials |
| 09/03/2008 | CN101258304A Two-stroke engine with variable compression |
| 08/06/2008 | CN100408819C Piston mechanism provided with divergent pistons |
| 07/24/2008 | DE102007057810A1 Position measuring device for a fluidic cylinder comprises a longitudinal channel in a cylinder housing for receiving a sensor support which lies on a housing end region and is supported on a pressure spring |
| 07/01/2008 | US7392737 Dynamic system for refrigeration equipment |
| 06/25/2008 | EP1934430A1 A two-stroke engine with variable compression |
| 06/19/2008 | WO2007006469A3 Gas flow control for opposed piston engine comprising sliding sleeves |
| 06/19/2008 | US20080141855 Efficiencies for cam-drive piston engines or machines |
| 06/18/2008 | EP1933006A1 3-,5-,7-,9-,11- etc. chamber cylinder construction (expansion possible up to strength limit) |
| 06/17/2008 | US7387093 Internal combustion engine with sidewall combustion chamber and method |
| 06/11/2008 | EP1929138A1 An engine arrangement |
| 06/10/2008 | US7383797 Double piston cycle engine |
| 06/10/2008 | US7383796 Internal combustion engine |
| 06/05/2008 | US20080127947 OPOC engine |
| 05/27/2008 | US7377406 Two stage grease gun |
| 05/22/2008 | US20080118375 Axially Driven Piston-Cylinder Unit |
| 05/14/2008 | EP1614876B1 Piston mechanism provided with divergent pistons |
| 05/08/2008 | WO2007030076A8 A two-stroke engine with variable compression |
| 05/01/2008 | US20080098992 Two-Stroke Internal Combustion Engine |
| 05/01/2008 | US20080098882 Fluid motor |
| 04/17/2008 | US20080087162 Radial impulse engine, pump, and compressor systems, and associated methods of operation |
| 04/10/2008 | US20080083325 Mid-power spring brake actuator having fuse-collar design for safety |
| 03/26/2008 | CN101151444A Opposed piston, homogeneous charge pilot ignition engine |
| 03/20/2008 | WO2008033254A2 Split-cycle aircraft engine |
| 03/13/2008 | US20080060512 Actuator |
| 03/04/2008 | US7337927 Two stage grease gun |
| 02/28/2008 | US20080047424 Variable displacement compressor |
| 01/24/2008 | WO2008009131A1 Wave transducer having variable energy piston assembly |
| 01/17/2008 | WO2008007971A1 Pumping machine or compressor and systems using such units |
| 01/17/2008 | WO2007137525A3 Combustion engine with self-ignition of air-and-fuel mixture |
| 01/17/2008 | US20080011154 Pneumatic pump |
| 01/09/2008 | EP1876323A1 Combustion engine with auto ignition of the air-fuel mix |
| 12/26/2007 | EP1869300A1 Opposed piston, homogeneous charge pilot ignition engine |
| 12/26/2007 | CN101094970A Dynamic system for refrigeration equipment |
| 12/21/2007 | WO2007144074A1 Internal combustion engine, particularly for a tool |
| 12/13/2007 | US20070283802 Pneumatic System with One or More Piston-Cylinder Arrangements |
| 11/20/2007 | US7296405 Variable flow reducing valve and gradual control valve distribution system for a compressed air injection engine operating on mono or multi energy and other engines or compressors |