| Patents for F02B 71 - Free-piston engines; Engines without rotary main shaft (1,404) |
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| 11/12/2002 | US6479964 Power pack for cordless tools and electronics |
| 10/30/2002 | EP1252423A2 Energy converter |
| 10/29/2002 | US6470683 Controlled direct drive engine system |
| 10/29/2002 | US6470677 Free piston engine system with direct drive hydraulic output |
| 10/15/2002 | US6463903 Piston assembly for free piston internal combustion engine |
| 10/15/2002 | US6463895 Free piston internal combustion engine with pulse compression |
| 10/15/2002 | US6463894 Portable internal combustion-engined tool and method of forming a gas mixture in the tool combustion chamber |
| 10/09/2002 | EP1247011A2 Free-piston unit for generating hydraulic energy |
| 10/08/2002 | US6460507 Combustion-engined tool |
| 10/08/2002 | US6460493 Uniflow scavenging microengine |
| 10/03/2002 | US20020139323 Opposed piston linearly oscillating power unit |
| 09/26/2002 | US20020134324 Free-piston engines |
| 09/25/2002 | EP1242728A1 Microcombustion engine/generator |
| 09/10/2002 | US6446434 Power machinery for temperature-differential engine |
| 09/03/2002 | US6443419 Fast working hydraulic valve |
| 08/29/2002 | WO2002066807A1 Reciprocating piston engine |
| 08/29/2002 | WO2002066806A1 Reciprocating piston machine |
| 08/29/2002 | DE10108084A1 Hubkolbenmaschine Reciprocating engine |
| 08/29/2002 | DE10101591A1 Wassergekühlter Verbrennungsmotor mit angekoppeltem Generator Water-cooled internal combustion engine coupled generator |
| 08/29/2002 | DE10028738A1 Freikolbenmotor mit einem Feder-Masse-System Free-piston engine with a spring-mass system |
| 08/22/2002 | US20020113573 Power pack for cordless tools and electronics |
| 08/22/2002 | DE10108007A1 Hubkolbenmaschine Reciprocating engine |
| 08/22/2002 | DE10108006A1 Verfahren zur Überwachung einer Hubkolbenmaschine sowie diesbezügliche Hubkolbenmaschine Method for monitoring a reciprocating engine and related reciprocating piston engine |
| 08/21/2002 | EP1232335A1 Free-piston engine |
| 08/13/2002 | US6431146 Free piston engine and self-actuated fuel injector therefor |
| 08/07/2002 | CN1088797C Linear electrical generator |
| 07/18/2002 | WO2002055852A1 Free piston engine system with direct drive hydraulic output |
| 07/18/2002 | US20020092485 Free piston engine and self-actuated fuel injector therefor |
| 07/17/2002 | EP1222373A1 Free-piston internal combustion engine |
| 07/04/2002 | US20020083907 Uniflow scavenging microengine |
| 07/02/2002 | US6412273 Continuous-combustion piston engine |
| 06/20/2002 | US20020073703 Free piston engine system with direct drive hydraulic output |
| 06/19/2002 | EP1080301B1 Piston for use in an engine |
| 06/12/2002 | EP0975861B1 Free piston engine provided with an air dosing system |
| 06/06/2002 | WO2002005407A3 Miniature generator |
| 06/04/2002 | US6397793 Microcombustion engine/generator |
| 05/29/2002 | EP1208288A1 Dc centering of free piston machines |
| 05/23/2002 | WO2002040843A1 Two-stroke engine |
| 05/16/2002 | WO2001049999A9 Microcombustion engine/generator |
| 05/02/2002 | WO2002018760A8 Controlled direct drive engine system |
| 05/02/2002 | EP1200719A1 Free piston internal combustion engine with rotating piston |
| 04/17/2002 | EP1196683A1 Free piston engine with electrical power output |
| 04/11/2002 | WO2002029955A2 Power pack for cordless tools and electronics |
| 04/10/2002 | CN1082614C High-efficiency explosion engine provided with double-acting piston cooperating with auxiliary feed and inlet units |
| 04/03/2002 | EP0754364B1 Fluid bearing with compliant linkage for centering reciprocating bodies |
| 03/20/2002 | CN1341194A Free piston internal combustion engine with piston head having non-metallic bearing surface |
| 03/20/2002 | CN1341193A Method of operating free piston internal combustion engine with high pressure hydraulic fluid upon misfire on initial start-up |
| 03/14/2002 | DE10043615A1 Free-piston engine, e.g. double-piston engine with pistons connected by common piston rod with sliding spring-mounted driver element for direct force transmission without losses |
| 03/13/2002 | EP1185769A1 Cyclically operated fluid displacement machine |
| 03/07/2002 | WO2002018760A1 Controlled direct drive engine system |
| 02/28/2002 | US20020023598 Free-piston internal combustion engine |
| 02/26/2002 | US6349683 Miniature generator |
| 02/26/2002 | US6349682 Free piston engine and self-actuated fuel injector therefor |
| 02/07/2002 | DE10033443A1 Free-piston motor for driving e.g. axial reciprocating machine, has valves in paths connecting high pressure and low pressure tanks, so that compression strokes of piston act on valves |
| 01/24/2002 | WO2001058211A3 Energy converter |
| 01/17/2002 | WO2002005407A2 Miniature generator |
| 01/02/2002 | CN1077201C Gas driven mechanical oscillator and method |
| 12/13/2001 | WO2001095465A1 Linear generator with induction coil which moves with respect to fixed permanent magnets |
| 12/13/2001 | WO2001094752A1 Frre-piston internal combustion engine with valves located in pistons |
| 12/11/2001 | US6328002 Misfire tolerant combustion-powered actuation |
| 12/06/2001 | WO2001049998A3 Free-piston unit for generating hydraulic energy |
| 11/22/2001 | WO2001088353A1 Free piston engine with electrical power output |
| 11/22/2001 | WO2001088352A1 Free piston motor |
| 11/22/2001 | DE10120196A1 Free piston engine has engine piston driven by staged hydraulic piston, section of which with lesser diameter is arranged in work cylinder and section with greater diameter in compression cylinder |
| 11/21/2001 | EP1155228A1 Free piston internal combustion engine with piston head having a radially moveable cap |
| 11/21/2001 | EP1155227A1 Method of operating a free piston internal combustion engine with a variable pressure hydraulic fluid output |
| 11/21/2001 | EP1155226A1 Free piston internal combustion engine with piston head functioning as a bearing |
| 11/15/2001 | WO2001045977A3 A device including a combustion engine, a use of the device, and a vehicle |
| 11/13/2001 | US6314924 Method of operating a free piston internal combustion engine with a short bore/stroke ratio |
| 10/23/2001 | US6305159 Internal combustion engine and method for the operation of an internal combustion engine |
| 10/18/2001 | WO2001078219A1 An electrical machine |
| 10/18/2001 | WO2001078218A1 An electrical machine |
| 10/18/2001 | US20010029911 Microcombustion engine/generator |
| 09/26/2001 | CN1314973A Gas turbine engine coupled with an electric generator with regenerating system for thermal and mechanical recuperation elimination eliminating polluting constituents |
| 09/25/2001 | US6293231 Free-piston internal combustion engine |
| 09/19/2001 | CN1313454A Pneumatic mechanical vibrator and method thereof |
| 09/13/2001 | US20010020453 Free piston internal combustion engine with pulse compression |
| 08/28/2001 | US6279517 Free piston engine provided with a purging air dosing system |
| 08/21/2001 | US6276313 Microcombustion engine/generator |
| 08/16/2001 | WO2001059277A1 Free piston engine and self-actuated fuel injector therefor |
| 08/14/2001 | CA2184473C Fluid bearing with compliant linkage for centering reciprocating bodies |
| 08/09/2001 | WO2001058211A2 Energy converter |
| 08/07/2001 | US6269783 Free piston internal combustion engine with pulse compression |
| 07/25/2001 | EP1118754A2 A gas driven mechanical oscillator and method |
| 07/12/2001 | WO2001049999A1 Microcombustion engine/generator |
| 07/12/2001 | WO2001049998A2 Free-piston unit for generating hydraulic energy |
| 07/12/2001 | WO2001049373A1 Motor-driven jumping apparatus |
| 07/12/2001 | DE19962599A1 Tragbares, brennkraftbetriebenes Arbeitsgerät, insbesondere Setzgerät für Befestigungselemente A portable combustion-powered tool, in particular setting tool for fasteners |
| 07/12/2001 | CA2395911A1 Microcombustion engine/generator |
| 07/05/2001 | US20010006045 Combustion-engined tool |
| 07/05/2001 | US20010006044 Portable internal combustion-engined tool and method of forming a gas mixture in the tool combustion chamber |
| 07/05/2001 | DE19962597A1 Tragbares, brennkraftbetriebenes Arbeitsgerät und Verfahren zum Bereitstellen eines Gasgemisches in seiner Brennkammer A portable combustion-powered job Apparatus and method for providing a gas mixture into its combustion chamber |
| 06/28/2001 | WO2001045977A2 A device including a combustion engine, a use of the device, and a vehicle |
| 06/19/2001 | US6247332 Gas driven mechanical oscillator and method |
| 06/12/2001 | US6244226 Free piston internal combustion engine with rotating piston |
| 06/05/2001 | US6241488 Multi-piston hydraulic pump for a free piston engine |
| 05/31/2001 | WO2001038706A1 Free-piston engine |
| 05/31/2001 | DE10026728A1 Free piston motor for converting energy from petrol/oil into hydraulic energy has control piston to determine changeover from high pressure and low pressure reservoirs |
| 05/02/2001 | EP1095211A1 Gas turbine engine coupled with an electric generator with regenerating system for thermal and mechanical recuperation eliminating polluting constituents |
| 04/25/2001 | EP1093544A1 Fast working hydraulic valve |