| Patents for F04C 3 - Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type (370) |
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| 03/11/2004 | US20040045237 Insulated concrete form and welded wire form tie |
| 08/20/2003 | CN1118631C 旋转活塞泵 Rotary piston pump |
| 07/23/2003 | EP1164249A4 Spherical positive-displacement rotary machine |
| 07/10/2003 | WO2003055551A1 Radial compressor for respirators |
| 07/01/2003 | US6585923 Extrusion method and extruder |
| 06/17/2003 | US6579081 Spherical positive-displacement rotary machine |
| 01/22/2003 | CN1392021A Laser repairing process for failed gas compressor rotor |
| 09/19/2002 | WO2002073006A1 Spherical fluid machine with flow control mechanism |
| 09/10/2002 | US6447275 Screw pump |
| 06/06/2002 | WO2002044567A1 Rotary-piston pump |
| 12/19/2001 | EP1164249A1 Spherical positive-displacement rotary machine |
| 12/04/2001 | CA2183303C Pump protection system with an interstage liquid/gas phase detector |
| 09/05/2001 | CN1311396A 旋转活塞泵 Rotary piston pump |
| 08/16/2001 | EP1123191A1 Extrusion method, extruder and product produced thereby |
| 08/02/2001 | US20010010801 Spherical fluid machine with flow control mechanism |
| 06/05/2001 | US6241493 Spherical fluid machine with control mechanism |
| 05/09/2001 | EP1097305A1 Screw pump |
| 04/11/2001 | CN1064437C Tooth screw stem |
| 03/07/2001 | EP0885358B1 Rotary piston pump |
| 11/09/2000 | DE19948520C1 Material feed and/or compacting device uses globoid pump with helical feed channel and sealing elements fed along helical guide channel |
| 10/24/2000 | US6135743 Rotary piston pump |
| 09/28/2000 | WO2000057028A1 Spherical positive-displacement rotary machine |
| 04/27/2000 | WO2000023251A1 Extrusion method, extruder and product produced thereby |
| 04/20/2000 | DE19846871A1 Universal water motor to generate energy consists of slide piston rotated in water channel by static water pressure to generate energy |
| 02/03/2000 | WO2000005503A1 Screw pump |
| 01/05/2000 | CN2357157Y Rotary piston pump |
| 11/17/1999 | CN2349384Y Press-boot pivoted impeller-insulated rolling-rotator compressor |
| 10/21/1999 | DE19708644C2 Rotationskolbenmaschine mit elastisch verformbarer Arbeitsraumwand Rotary piston machine with elastically deformable working space wall |
| 04/22/1999 | WO1999019606A1 A fluid transmission apparatus |
| 01/06/1999 | CN1041546C Oblique tray machine |
| 12/23/1998 | EP0885358A1 Rotary piston pump |
| 11/04/1998 | CN2296419Y New structure driver of single screw oil submersible pump |
| 10/21/1998 | CN2295064Y Multifunction jet pump for motor vehicle |
| 10/07/1998 | CN2293665Y Insulation screw pump |
| 08/27/1998 | DE19708644A1 Rotary piston machine with deformable working chamber wall |
| 08/12/1998 | EP0857875A1 Fluid media delivery pump |
| 07/09/1998 | DE19700360A1 Disc pump or rotary piston pump for different types of material |
| 06/18/1998 | WO1998026182A1 Rotary piston pump |
| 06/16/1998 | CA2131181C Compressor slide valve control |
| 05/20/1998 | CN2282082Y Adjustable screw pump lining |
| 04/23/1998 | WO1998016723A1 Hemispherical engine |
| 03/04/1998 | CN1174941A Butterfly-shaped piston pump |
| 02/04/1998 | CN2273787Y Teeth like screw stem |
| 12/16/1997 | CA2045400C Power conversion machine with pistons rotating in pairs relative to each other in a spherical housing |
| 10/30/1997 | DE19716439A1 Rotary swing=vane pump |
| 10/22/1997 | CN2265445Y Duplex universal-joint driving mechanism for single screw pump |
| 10/16/1997 | DE19616125A1 Spherical piston pump |
| 07/23/1997 | CN1155039A Tooth screw stem |
| 02/12/1997 | CN2247244Y Compact high-effect screw pump |
| 02/11/1997 | US5601414 Interstage liquid/gas phase detector |
| 02/22/1996 | DE4428222C1 Rotary vane type pump |
| 12/27/1995 | CN1114004A Wobble plate machine |
| 06/01/1995 | DE4340692A1 Spherical piston pump |
| 03/07/1995 | US5395225 Screw pump having eccentric circular sealing discs |
| 03/02/1995 | DE4328223A1 Ball piston pump |
| 12/28/1994 | EP0630445A1 Compressor slide valve control |
| 12/15/1994 | DE4319408A1 Device for conveying and compressing various materials |
| 11/15/1994 | US5364251 Worm pump for thick media and/or media containing lumps, e.g. meat |
| 09/15/1994 | DE4308059A1 Metering apparatus for material of various kinds |
| 09/01/1994 | DE4305758A1 Device for conveying and/or compacting material of different types |
| 08/02/1994 | US5333998 Pintle fixing construction for radial plunger pump |
| 05/04/1994 | EP0523113B1 Screw pump |
| 03/15/1994 | US5293849 Continuously rotating engine apparatus |
| 11/27/1993 | CA2069607A1 Spherical rotary pump |
| 11/18/1993 | EP0569959A1 Screw pump |
| 09/16/1993 | WO1993018307A1 Compressor slide valve control |
| 02/02/1993 | US5183395 Compressor slide valve control |
| 01/20/1993 | EP0523113A1 Screw pump. |
| 12/30/1992 | CN2126330U Web wheel screw pump |
| 09/15/1992 | US5147193 Power conversion machine with pistons rotating in pairs relative to each other in a spherical housing |
| 06/03/1992 | EP0488043A1 Capacity volume ratio control for twin screw compressors |
| 06/03/1992 | CN1061646A , |
| 06/02/1992 | CA1302377C Power conversion machine having pistons which are moved in a turning motion in a spherical housing |
| 05/06/1992 | CN1016522B Positive-displacement rotor pump with cavity of spiral curved surface |
| 04/07/1992 | US5102294 Screw pump |
| 02/12/1992 | CN2095941U Ball type volume changing machine |
| 01/15/1992 | EP0465846A1 Spherical piston pump |
| 11/27/1991 | CN1014921B Power conversion machine provided with pistons rotating in spherical housing |
| 10/16/1991 | CN1014345B Bicorn rotator pump |
| 10/03/1991 | WO1991014869A1 Screw pump |
| 09/04/1991 | CN1013794B Disk-type rotary piston pump |
| 09/03/1991 | US5044894 Capacity volume ratio control for twin screw compressors |
| 06/05/1991 | CN1012750B Power coversion machine having pistons which are moved in turning movement in spherical housing |
| 04/11/1991 | DE3929707A1 Bevel gear pump for pumping viscous liq. - has two meshing bevel gears driven separately by synchronised drive |
| 04/03/1991 | EP0420191A2 Screw pump |
| 01/31/1991 | DE3925202A1 Bevel gear pump with coupled axles - has transmission linkage for ensuring synchronisation of two cooperating bevel gear wheels |
| 01/09/1991 | EP0293413B1 Power conversion machine having pistons which are moved in a turning movement in a spherical housing |
| 12/27/1990 | EP0277114B1 Displacement machine |
| 10/17/1990 | CN1010046B Conical ring rotary piston pump |
| 09/19/1990 | CN1045444A Positive-displacement rotor pump with cavity of spiral curved surface |
| 08/08/1990 | EP0381639A2 Power conversion machine provided with pistons rotating in a spherical housing |
| 08/08/1990 | CN1044518A Disk-type rotary piston pump |
| 08/07/1990 | US4946355 Orbital pump |
| 07/25/1990 | CN1044149A Power conversion machine provided with pistons rotating in spherical housing |
| 07/10/1990 | WO1990007632A1 Power conversion machine with pistons rotating in pairs relative to each other in a spherical housing |
| 07/03/1990 | US4938025 Power conversion machine having pistons which are moved in a turning movement in a spherical housing |
| 02/14/1990 | CN1039643A Rotary piston pump with conical ring segment |
| 02/13/1990 | US4900239 Method and a screw machine for processing fluid under high pressures, with liquid injection between a sealing portion and a support portion of the gate-rotor |
| 01/09/1990 | CA1264250A1 Screw machine |
| 01/02/1990 | US4890989 Positive displacement machine with a plastic gate pinton |