| Patents for F02B 71 - Free-piston engines; Engines without rotary main shaft (1,404) |
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| 11/03/1998 | US5830357 Process for cleaning a waste water stream or the like |
| 11/03/1998 | US5829393 Free-piston engine |
| 10/22/1998 | WO1998046870A1 Free piston engine provided with a purging air dosing system |
| 10/21/1998 | EP0871819A1 1-cylinder-2-chamber motor |
| 10/21/1998 | EP0813650B1 Power plant |
| 10/01/1998 | DE19743776A1 Free piston engine |
| 09/29/1998 | US5813371 Computerized internal supercharged engine-pump |
| 09/16/1998 | EP0772735B1 Free-piston engine |
| 08/13/1998 | DE19742779A1 Internal combustion engine to drive oil pump or similar equipment |
| 08/12/1998 | EP0857546A1 Combustion powered tool |
| 08/04/1998 | US5788003 Electrically powered motor vehicle with linear electric generator |
| 07/29/1998 | EP0737272B1 Multi-piston hydraulic pump for a free-piston engine |
| 07/22/1998 | EP0766781B1 Linear electrical energy generator |
| 07/15/1998 | EP0840844A4 Free piston engine |
| 07/07/1998 | US5775273 Free piston internal combustion engine |
| 07/01/1998 | CN1186535A 自由活塞发动机 Free piston engine |
| 06/16/1998 | US5765374 Method for converting energy of an expanding gas into mechanical work |
| 05/27/1998 | CN1183133A Power device |
| 05/14/1998 | WO1998020242A1 1-cylinder-2-chamber motor |
| 05/14/1998 | DE19745810A1 Free-piston IC engine for compact city vehicle |
| 05/13/1998 | EP0840844A1 Free piston engine |
| 05/07/1998 | DE19700216C1 Internal combustion engine with direct pulse drive |
| 05/07/1998 | DE19644863A1 Integrated position measurement for free-piston engine with linear generator e.g. for hybrid drive electric vehicle |
| 05/06/1998 | EP0839265A1 Operation and control of a free piston aggregate |
| 04/23/1998 | DE19746230A1 Energy conversion system |
| 04/09/1998 | WO1998014694A1 Engine working according to the method of pulsating combustion |
| 04/09/1998 | DE19640191A1 Nach dem Verfahren der pulsierenden Verbrennung arbeitende Kraftmaschine In the process of pulsating combustion engine working |
| 03/25/1998 | EP0772734B1 Hydraulic switching valve, and a free-piston engine provided therewith |
| 03/18/1998 | EP0828928A1 Power plant |
| 02/05/1998 | WO1998004819A1 High-yield linear generator set, control method and traction unit therewith |
| 02/03/1998 | US5713313 Combustion powered tool with dual fans |
| 01/08/1998 | DE19625182A1 Computer controlled gas generator for gas turbine |
| 12/29/1997 | EP0813650A1 Power plant |
| 12/11/1997 | DE4447138A1 Arrangement for hybrid drive of vehicle esp. automobile |
| 11/12/1997 | EP0783618A4 Centering system with one way valve for free piston machine |
| 10/21/1997 | US5678522 Free piston internal combustion engine |
| 10/14/1997 | US5676097 High-efficiency explosion engine provided with a double-acting piston cooperating with auxiliary feed inlet units |
| 10/11/1997 | CA2173764A1 Reciprocating system |
| 09/25/1997 | WO1997035104A1 Free piston engine and method of operating |
| 09/18/1997 | WO1997034079A1 A free-piston gas generator |
| 08/07/1997 | WO1997028363A1 An improvement in free-piston devices |
| 08/07/1997 | WO1997028362A1 A method for controlling the stroke of a diesel free-piston gas generator |
| 07/23/1997 | EP0767865A4 Free piston end position limiter |
| 07/16/1997 | EP0783618A1 Centering system with one way valve for free piston machine |
| 07/15/1997 | US5647734 Hydraulic combustion accumulator |
| 07/08/1997 | US5646363 Free piston machine |
| 06/26/1997 | DE19545397A1 Low emissions diesel electro-drive |
| 06/11/1997 | EP0560956B1 Oscillating piston motor and installation with an oscillating piston motor |
| 06/04/1997 | EP0381709B1 Compact fluid operated apparatus and method |
| 05/21/1997 | CN1150217A High-efficiency explosion engine provided with double-acting piston cooperating with auxiliary feed and inlet units |
| 05/14/1997 | EP0772735A1 Free-piston engine |
| 05/14/1997 | EP0772734A1 Hydraulic switching valve, and a free-piston engine provided therewith |
| 05/14/1997 | CN1149905A Linear electrical generator |
| 04/23/1997 | EP0769479A1 Process for cleaning a waste water stream or the like |
| 04/16/1997 | EP0767865A1 Free piston end position limiter |
| 04/09/1997 | EP0766781A1 Linear electrical energy generator |
| 03/26/1997 | EP0764776A1 High-efficiency explosion engine provided with a double-acting piston cooperating with auxiliary feed and inlet units |
| 03/23/1997 | CA2185577A1 High-efficiency explosion engine provided with a double-acting piston cooperating with auxiliary feed and inlet units |
| 03/04/1997 | US5608581 Rear view apparatus |
| 01/29/1997 | EP0683854B1 Free-piston engine having a fluid pressure unit |
| 01/29/1997 | EP0681645B1 Method for the cold start of a free-piston engine; and free-piston engine adapted for use of this method |
| 01/29/1997 | EP0614508B1 Free-piston engine having a fluid energy unit |
| 01/22/1997 | EP0754364A1 Fluid bearing with compliant linkage for centering reciprocating bodies |
| 11/21/1996 | DE19519075A1 IC engine whose explosive force provides rotary motion |
| 11/20/1996 | EP0711378A4 A gas driven mechanical oscillator and method |
| 11/07/1996 | WO1996035046A1 Power plant |
| 11/05/1996 | US5570769 Linear and rotary actuator combination |
| 10/24/1996 | WO1996033343A1 Free piston engine |
| 10/24/1996 | CA2218388A1 Free piston engine |
| 10/17/1996 | WO1996032576A1 Operation and control of a free piston aggregate |
| 10/17/1996 | CA2217864A1 Operation and control of a free piston aggregate |
| 10/16/1996 | EP0737272A1 Multi-piston hydraulic pump for a free-piston engine |
| 09/19/1996 | WO1996028650A1 Power plant |
| 09/17/1996 | US5556262 Free-piston engine having a fluid energy unit |
| 09/04/1996 | CN1130413A Gas driven mechanical oscillator and method |
| 09/03/1996 | US5551233 Thermal cycle for operation of a combustion engine |
| 07/30/1996 | US5540194 Reciprocating system |
| 07/30/1996 | US5540193 Method for the cold start of a free-piston engine; and free-piston engine adapted for use of this method |
| 07/23/1996 | US5537820 Free piston end position limiter |
| 07/04/1996 | DE4410926A1 Computer-assisted 2-stroke free-piston type gas generator |
| 06/20/1996 | WO1995018305A1 Multi-piston hydraulic pump for a free-piston engine |
| 06/11/1996 | US5525845 Fluid bearing with compliant linkage for centering reciprocating bodies |
| 05/23/1996 | DE4447040C1 IC engine with supercharger cylinder |
| 05/15/1996 | EP0711378A1 A gas driven mechanical oscillator and method |
| 03/14/1996 | WO1996007815A1 Centering system with one way valve for free piston machine |
| 02/08/1996 | WO1996003576A1 Free-piston engine |
| 02/08/1996 | WO1996003575A1 Hydraulic switching valve, and a free-piston engine provided therewith |
| 01/31/1996 | EP0613521B1 Free-piston engine having a fluid pressure unit |
| 01/09/1996 | US5482445 Free-piston engine having a slidable ring for moving the piston |
| 01/04/1996 | WO1996000342A1 Free piston end position limiter |
| 01/03/1996 | EP0464029B1 Unsymmetrical free piston engine |
| 12/27/1995 | EP0608385B1 Rear view apparatus |
| 12/14/1995 | WO1995033921A1 Linear electrical energy generator |
| 12/12/1995 | US5473893 Free-piston engine having a fluid pressure unit |
| 12/07/1995 | WO1995033125A1 A gas driven mechanical oscillator and method |
| 12/07/1995 | CA2168337A1 A gas driven mechanical oscillator and method |
| 11/29/1995 | EP0683854A1 Free-piston engine having a fluid pressure unit. |
| 11/29/1995 | EP0683853A1 Vibration-absorbed free-piston engine |
| 11/23/1995 | DE4417135A1 Linear four stroke IC engine |
| 11/15/1995 | EP0681649A1 Method and apparatus for controlling the injection of fuel |