| Patents for F02B 71 - Free-piston engines; Engines without rotary main shaft (1,404) |
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| 03/16/2006 | US20060054115 Combustion-engined setting tool |
| 03/15/2006 | EP1633955A2 Internal explosion engine and generator using non-combustible gases |
| 03/14/2006 | US7011051 Hybrid two cycle engine, compressor and pump, and method of operation |
| 03/09/2006 | US20060048727 Combustion-engined setting tool |
| 03/09/2006 | US20060048499 Pulsed detonation engine |
| 03/02/2006 | US20060042575 Hydraulic synchronizing coupler for a free piston engine |
| 03/02/2006 | US20060042574 Combustion-type power tool providing specific spark energy |
| 03/02/2006 | US20060042573 Combustion-type power tool having cooling arrangement |
| 03/02/2006 | US20060042572 Combustion-type power tool having gas canister cooling arrangement |
| 03/02/2006 | US20060042571 Fuel cell compartment for combustion-powered tool |
| 02/28/2006 | US7003964 Heat pump system |
| 02/16/2006 | DE102005021325A1 Internal combustion engine has piston faces rounded on circumference so that in reversal point of piston in corner region between cylinder end wall, cylinder jacket, and piston face an encompassing ignition chamber is formed |
| 02/16/2006 | DE102004042953B3 Brenngasbetriebenes Setzgerät Fuel gas actuated fastening tool |
| 02/14/2006 | US6997145 Recycler for linear motor |
| 02/02/2006 | US20060021589 Valve system for a rapid response power conversion device |
| 01/24/2006 | US6988469 Combustion-engined setting tool with volumetric metering of gaseous fuel |
| 01/19/2006 | DE102005025446A1 Luftspülung für einen Freikolbenmotor Air purge for a free piston engine |
| 01/18/2006 | EP1615684A1 Portable combustion-powered device with priming combustion chamber and main combustion chamber |
| 01/18/2006 | EP1042596B1 Device for digital hydraulic pressure transformation (dhpt) |
| 01/12/2006 | WO2006003376A1 Control of reciprocating linear machines |
| 01/12/2006 | US20060006207 Combustion type power tool having buffer piece |
| 01/11/2006 | EP1252423B1 Energy converter |
| 01/10/2006 | US6983724 Starting a compression ignition free piston internal combustion engine having multiple cylinders |
| 01/05/2006 | WO2006000899A1 A sodium cooled piston for a free piston engine |
| 01/03/2006 | US6981474 Setting tool |
| 12/29/2005 | US20050284428 Piston stopper for a free piston engine |
| 12/29/2005 | US20050284427 Free piston compressor |
| 12/29/2005 | US20050284426 Piston guides for a free piston engine |
| 12/29/2005 | DE102005018565A1 Kraftstoffeinspritzung für einen Freikolbenmotor Fuel injection for a free piston engine |
| 12/15/2005 | DE102005023178A1 Kompressionsimpulsverfahren zum Anlassen eines Freikolben-Verbrennungsmotors Compression pulse method for starting a free piston internal combustion engine |
| 12/13/2005 | US6973898 Piston stopper for a free piston engine |
| 12/08/2005 | WO2005116447A1 Opposed piston opposed cylinder free piston engine |
| 12/08/2005 | DE102005020625A1 Elektromagnetisches-Stellventil-Strategie zur Steuerung eines Freikolbenmotors An electromagnetic control valve strategy for controlling a free-piston engine |
| 12/06/2005 | US6971341 Piston lubrication for a free piston engine |
| 12/06/2005 | US6971340 Compression pulse starting of a free piston internal combustion engine |
| 12/06/2005 | US6971339 Electromagnetic servo valve strategy for controlling a free piston engine |
| 12/01/2005 | US20050263114 Piston lubrication for a free piston engine |
| 12/01/2005 | DE102005020636A1 Kompressionsimpulsverfahren zum Anlassen eines Freikolben-Verbrennungsmotors mit mehreren Zylindern Pulse compression method for starting a free piston combustion engine with several cylinders |
| 11/24/2005 | US20050257759 Two-stroke internal combustion engine with free opposed pistons |
| 11/24/2005 | US20050257758 Compression pulse starting of a free piston internal combustion engine |
| 11/24/2005 | US20050257757 Method for regulating the operation of a device for generating electric energy by means of a generator driven by a free-piston internal combustion engine |
| 11/22/2005 | US6966280 Compression pulse starting of a free piston internal combustion engine having multiple cylinders |
| 11/10/2005 | US20050247274 Compression pulse starting of a free piston internal combustion engine having multiple cylinders |
| 11/10/2005 | US20050247273 Pneumatic spring for starting a free piston internal combustion engine |
| 11/10/2005 | US20050247272 Starting a compression ignition free piston internal combustion engine having multiple cylinders |
| 11/10/2005 | US20050247271 Electromagnetic servo valve strategy for controlling a free piston engine |
| 11/01/2005 | US6959672 Fuel injection for a free piston engine |
| 10/27/2005 | WO2005100769A2 Method and system for controlling a free-piston energy converter |
| 10/27/2005 | WO2005100764A1 Method and system for controlling a free-piston energy converter |
| 10/26/2005 | EP1208288B1 Dc centering of free piston machines |
| 10/26/2005 | CN1224778C Energy converter |
| 10/25/2005 | US6957632 Air charging system for an opposed piston opposed cylinder free piston engine |
| 10/13/2005 | US20050224024 Temperature-controlled fan delayed shut-off |
| 10/13/2005 | US20050223888 Pneumatic actuator for precision servo type applications |
| 10/11/2005 | US6953010 Opposed piston opposed cylinder free piston engine |
| 10/05/2005 | CN1678823A Method for regulating the operation of a device for generating electric energy by means of a generator driven by a free-piston internal combustion engine |
| 10/05/2005 | CN1676898A Mechanical ideal internal combustion engine |
| 09/29/2005 | DE102005010535A1 Vorrichtung und Verfahren zum Erzeugen elektrischer Energie in einem Bohrloch Apparatus and method for generating electric energy in a borehole |
| 09/27/2005 | US6948459 Position sensing for a free piston engine |
| 09/20/2005 | US6945202 Free piston engine and power generation system therewith |
| 09/15/2005 | WO2004092557B1 Internal explosion engine and generator using non-combustible gases |
| 09/15/2005 | US20050200210 Apparatus and method for generating electrical power in a borehole |
| 09/13/2005 | US6941904 Air scavenging for an opposed piston opposed cylinder free piston engine |
| 08/24/2005 | EP1247011B1 Free-piston unit for generating hydraulic energy |
| 08/23/2005 | US6932031 Scavenging system for intermittent linear motor |
| 08/23/2005 | US6932030 Microgenerator of electrical energy |
| 08/23/2005 | US6931845 Free piston engine |
| 08/17/2005 | EP1563172A2 Two-stroke internal combustion engine with free opposed pistons |
| 08/10/2005 | CN1653251A Internal combustion engine |
| 08/10/2005 | CN1214179C Free piston motor |
| 08/09/2005 | US6925971 Exhaust gas recirculation for a free piston engine |
| 08/04/2005 | DE10361585A1 Diesel bear for use as two stroke engine, has working channel connected to storage cubicle for combustion gas, where combustion gas is sucked-in from cubicle along with oxygen which is burnt during next suction stroke of bear |
| 07/27/2005 | EP1282766B1 Free piston motor |
| 07/13/2005 | CN1639959A Resonant electrical generation system |
| 07/07/2005 | US20050145206 Recycler for linear motor |
| 06/15/2005 | EP1540155A1 Energy converter |
| 06/14/2005 | US6904876 Sodium cooled pistons for a free piston engine |
| 06/09/2005 | WO2004092557A3 Internal explosion engine and generator using non-combustible gases |
| 06/09/2005 | US20050120983 Scavenging system for intermittent linear motor |
| 06/02/2005 | US20050115243 Flywheel vane combustion engine |
| 06/01/2005 | EP1534944A1 Method for regulating the operation of a device for generating electric energy by means of a generator driven by a free-piston internal combustion engine |
| 05/26/2005 | US20050109295 Free piston engine and power generation system therewith |
| 05/19/2005 | US20050103287 Internal combustion engine |
| 04/21/2005 | WO2004111555A3 Heat pump system |
| 04/21/2005 | US20050081804 Free-piston device with electric linear drive |
| 04/13/2005 | EP1522692A1 Fully-controlled, free-piston engine |
| 04/07/2005 | US20050072150 Flywheel combustion engine |
| 04/06/2005 | EP1222373A4 Free-piston internal combustion engine |
| 04/06/2005 | CN2690599Y Gas, etectric and oil mixed power device |
| 04/05/2005 | US6876094 Resonant electrical generation system |
| 04/05/2005 | US6874452 Resonant combustion chamber and recycler for linear motors |
| 03/08/2005 | US6863507 Generic free-piston engine with transformer valve assembly for reducing throttling losses |
| 02/09/2005 | EP1504176A2 Internal combustion engine |
| 01/26/2005 | CN1571884A Fully-controlled, free-piston engine |
| 01/19/2005 | EP1497542A1 Free-piston device provided with an electric linear drive |
| 12/29/2004 | EP1423611A4 Fully-controlled, free-piston engine |
| 12/29/2004 | EP1287233B1 Free-piston internal combustion engine with valves located in pistons |
| 12/23/2004 | WO2004111555A2 Heat pump system |
| 12/23/2004 | CA2526748A1 Heat pump system |
| 12/16/2004 | WO2004109084A1 Pulsed detonation engine |