| Patents for F01C 20 - Control of, monitoring of, or safety arrangements for, machines or engines (729) |
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| 02/28/2001 | CN1285893A Rotary positive-displacement machines |
| 01/23/2001 | US6176695 Control of a lobed rotor machine |
| 12/26/2000 | US6164906 Regulating valve for engines operated by a medium under pressure |
| 12/13/2000 | EP0835362B1 Rotary positive-displacement fluid machine |
| 12/06/2000 | EP1056944A1 Heat engine |
| 10/10/2000 | CA2214232C Variable rotary engine |
| 09/20/2000 | EP1036253A1 Rotary positive-displacement machines |
| 08/03/2000 | WO2000045032A1 Lever-mechanism motor or pump |
| 07/11/2000 | US6086347 Two-stage rotary vane motor |
| 07/04/2000 | US6082986 Reversible double-throw air motor |
| 06/20/2000 | US6077061 Vane motor with brake |
| 06/15/2000 | WO2000034661A1 Method for modifying the volume of working chambers in positive-displacement machines |
| 06/15/2000 | WO2000034627A1 Reversible pneumatic motor assembly |
| 03/29/2000 | EP0989286A1 Two stage rotary vane motor |
| 03/16/2000 | DE19940088A1 Steam engine provided with solenoid operated valve for controlling steam supply and rotation piston engine designed structurally in manner of Wankel engine is introduced as steam engine |
| 03/01/2000 | EP0982473A1 Rotary positive-displacement fluid machine |
| 02/25/2000 | CA2280533A1 Two-stage rotary vane motor |
| 12/01/1999 | EP0960267A1 Control of a lobed rotor machine |
| 10/27/1999 | EP0897458B1 Rotary piston internal combustion engine |
| 09/29/1999 | EP0945592A1 Rotary piston machine |
| 06/17/1999 | WO1999030005A1 Rotary positive-displacement machines |
| 06/08/1999 | US5910100 Process for extracting a first gas from a hot gaseous waste heat source |
| 05/06/1999 | EP0912818A1 Regulating valve for engines operated by a medium under pressure |
| 03/17/1999 | CN1211299A Rotary piston internal combustion engine |
| 02/24/1999 | EP0897458A1 Rotary piston internal combustion engine |
| 02/10/1999 | EP0836671B1 Vane motor with brake |
| 01/27/1999 | CN1205931A Pneumatic tool with reverse valve having overdrive |
| 12/03/1998 | DE19748427C1 Rotary piston engine |
| 12/03/1998 | DE19748426C1 Rotary piston internal combustion engine |
| 11/11/1998 | EP0876883A2 Pneumatic tool with a reverse valve having an overdrive |
| 10/29/1998 | WO1998048149A1 Kurochkin rotary machine |
| 08/26/1998 | CN1191588A Rotary positive-displacement fluid machine |
| 08/13/1998 | WO1998035136A1 Control of a lobed rotor machine |
| 08/13/1998 | CA2279328A1 Control of a lobed rotor machine |
| 07/07/1998 | US5775883 Rolling-piston expander apparatus |
| 05/06/1998 | EP0839258A1 Scroll decompression device for cryogenic temperatures |
| 04/22/1998 | EP0836671A1 Vane motor with brake |
| 04/15/1998 | EP0835362A1 Rotary positive-displacement fluid machine |
| 04/14/1998 | US5738065 Variable rotary engine |
| 04/01/1998 | EP0832721A1 Impact wrench |
| 01/22/1998 | WO1998002642A1 Regulating valve for engines operated by a medium under pressure |
| 01/22/1998 | CA2261047A1 Regulating valve for engines operated by a medium under pressure |
| 11/13/1997 | WO1997042398A1 Rotary piston internal combustion engine |
| 06/25/1997 | CN1152675A Rolling-wheel type expansion machine |
| 04/22/1997 | US5622149 High-power rotary engine with varaiable compression ratio |
| 04/09/1997 | EP0766777A1 Non-contact rotary vane gas expanding apparatus |
| 03/20/1997 | WO1997010419A1 Internal combustion rotary engine with variable compression ratio |
| 02/06/1997 | WO1997004215A1 Scroll decompression device for cryogenic temperatures |
| 01/23/1997 | WO1997002406A1 Vane motor with brake |
| 12/12/1996 | WO1996039571A1 Rotary positive-displacement fluid machine |
| 12/12/1996 | CA2220692A1 Rotary positive-displacement fluid machine |
| 09/12/1996 | WO1996027736A1 Sliding vane engine |
| 07/23/1996 | US5537973 Rotary engine with glow ignition system |
| 07/02/1996 | CA2011963C Fluid flow reversing and regulating ring |
| 06/11/1996 | US5524587 Sliding vane engine |
| 03/26/1996 | US5501586 Non-contact rotary vane gas expanding apparatus |
| 03/21/1996 | DE4428328A1 Rotary piston IC work engine |
| 12/28/1995 | WO1995035431A1 Non-contact rotary vane gas expanding apparatus |
| 12/28/1995 | CA2193393A1 Non-contact rotary vane gas expanding apparatus |
| 07/18/1995 | US5433179 Rotary engine with variable compression ratio |
| 06/08/1995 | WO1995015429A1 Improved rotary engine with variable compression ratio |
| 04/11/1995 | US5405254 Rotary fluid displacement apparatus |
| 03/23/1995 | WO1995008047A1 Sliding vane motor |
| 11/30/1994 | EP0626033A1 Rotary fluid displacement apparatus |
| 10/04/1994 | US5352295 Rotary vane engine |
| 05/10/1994 | US5309716 Rotary pump or engine with spherical body |
| 03/15/1994 | US5293747 Power regulator for a pressure fluid motor |
| 02/02/1994 | EP0581431A1 Pressure fluid motor having a power regulator |
| 12/15/1993 | EP0403599B1 Scroll fluid device provided with synchronizing and unloading means |
| 11/17/1993 | CN1022772C Combined impeller rotary engine |
| 09/22/1993 | EP0561212A2 Fluid displacement apparatus with a spiral element |
| 09/07/1993 | US5241817 For propelling a wheeled vehicle |
| 08/19/1993 | WO1993016270A1 Rotary fluid displacement apparatus |
| 07/06/1993 | CA1319890C Synchronizing and unloading system for scroll fluid device |
| 04/20/1993 | US5203297 Rotary engine |
| 03/23/1993 | US5195881 Screw-type compressor/expander with valves at each axial end of rotors |
| 12/08/1992 | US5168846 Rotary engine with variable displacement |
| 11/18/1992 | CN1066318A Combination type rotary blade engine |
| 07/21/1992 | US5131826 Rolling piston rotary machine with vane control |
| 07/07/1992 | US5127810 Rotary pump or engine with spherical body |
| 06/16/1992 | US5121607 Energy recovery system for large motor vehicles |
| 02/06/1992 | DE4119242A1 Rotary piston steam engine - has pump to return condensate to evaporator |
| 01/29/1992 | EP0401220B1 Rotary piston compressed air motor |
| 12/26/1991 | WO1991015661A3 Variable-volume rotating fluid-dynamic machine |
| 12/12/1991 | DE4018326A1 Positive displacement pump with rotating chambers - has adjustable suction or discharge volume per revolution with primary and secondary adjustment on control ports |
| 11/14/1991 | DE4014851A1 Screw gear pump with adjustable delivery inlet volume flow - has at least one back pressure valve allowing permanent or periodical escape of flow fraction |
| 10/17/1991 | WO1991015661A2 Variable-volume rotating fluid-dynamic machine |
| 08/14/1991 | DE4004142A1 IC-piston engine - has adjustable displaced volume with drive shaft encompassed by eccentric wheels rotatable in relation to drive shaft |
| 06/05/1991 | EP0430789A1 Rotary machine with rolling piston |
| 05/29/1991 | CA2029796A1 Rotary machine with a rolling piston |
| 05/28/1991 | US5018432 Hydrostatic steering device with a radially free floating valve member |
| 04/04/1991 | WO1991004402A1 Stirling engine type machine |
| 12/12/1990 | CN1010794B Internal-axis rotary-piston machine |
| 10/16/1990 | US4962787 Fluid flow reversing and regulating ring |
| 09/27/1990 | DE3909259A1 Hydraulic motor with axial working connections |
| 09/26/1990 | EP0323979A4 Rotary machine |
| 07/24/1990 | US4943213 Internal axis rotary piston machine with meshing engagement between outer and inner rotors |
| 06/21/1990 | DE3841937A1 Rotary engine |
| 05/22/1990 | US4927340 Synchronizing and unloading system for scroll fluid device |
| 04/18/1990 | EP0213154B1 Rotary motion fluid apparatus |