| Patents for F04B 7 - Piston machines or pumps characterised by having positively-driven valving (2,226) |
|---|
| 07/28/1999 | EP0659236B1 Self-cleaning reciprocating and/or rotating device |
| 07/28/1999 | CN1224119A Enclosed compressor |
| 07/13/1999 | US5921755 Dry vacuum pump |
| 07/07/1999 | EP0927822A1 Valveless metering pump |
| 07/06/1999 | US5920006 To direct sample and solvent liquids from containment reservoirs to a column |
| 06/30/1999 | EP0925450A1 Pump for thick substances |
| 06/18/1999 | CA2225204A1 Valveless metering pump |
| 05/27/1999 | DE19802043A1 Piston pump with at least two pump cylinders located in pump housing |
| 05/11/1999 | US5901729 Material flow control arrangement and method |
| 05/06/1999 | EP0912829A1 Dosing pump with magnetic control |
| 05/04/1999 | US5899675 Pump comprising a chamber with inlet and outlet openings, a steam iron comprising said iron and a method of manufacturing said pump |
| 04/28/1999 | CN2316488Y Forced air compressor |
| 04/14/1999 | EP0742870B1 Hydrostatic axial piston machine |
| 04/13/1999 | US5893708 Rotating piston for ball and seat valve assembly and downhole pump utilizing said valve assembly |
| 03/24/1999 | EP0883745A4 Valveless double acting positive displacement fluid transfer device |
| 03/23/1999 | CA2102625C Method and apparatus for calibrating a multiple port pump |
| 03/10/1999 | EP0791126A4 Dual-piston pump apparatus |
| 03/09/1999 | US5879137 Method and apparatus for pressurizing fluids |
| 03/03/1999 | EP0898653A2 Hydraulic pressure control system for a pump |
| 03/03/1999 | EP0671070B1 Linear actuator with feedback position sensor device |
| 03/02/1999 | US5875814 Ceramic lined pump adaptor and in-line splitter |
| 02/25/1999 | WO1999009318A1 Improved fuel pump control valve assembly |
| 02/25/1999 | WO1999009315A1 Two-cylinder thick matter pump |
| 02/25/1999 | WO1998052624A3 Volumetric pump with sterility seal |
| 02/24/1999 | EP0898053A2 Pump vane made of wear-resistant sheet material |
| 02/24/1999 | EP0897473A1 Disposable ambulatory microprocessor controlled volumetric pump |
| 02/24/1999 | CN1042258C Concrete pump with conveying cylinder |
| 02/17/1999 | CN1042166C Adhesive material pump with rotative dispensing mechanism |
| 01/27/1999 | EP0757756B1 Thick matter pump |
| 01/26/1999 | US5863187 Two position rotary reciprocating pump with liquid displacement flow adjustment |
| 01/19/1999 | US5860795 Method for underground-reservoir fluids production with pump drive contained within the wellbore |
| 01/12/1999 | US5857490 For a positive displacement pump |
| 01/07/1999 | DE19727102A1 Pipe switch for twin-cylinder viscous fluid pumps |
| 12/22/1998 | USRE35997 Self cleaning reciprocating and/or rotating device |
| 12/17/1998 | WO1998057063A1 Two-cylinder thick matter pump |
| 12/17/1998 | DE19724504A1 Zweizylinderdickstoffpumpe Two-cylinder slurry pump |
| 12/16/1998 | EP0883745A1 Valveless double acting positive displacement fluid transfer device |
| 12/10/1998 | WO1998055765A1 Double action piston pump system for irrigation purposes using energy of runnig water |
| 12/09/1998 | EP0882873A1 Piston pump |
| 11/26/1998 | WO1998052624A2 Volumetric pump with sterility seal |
| 11/18/1998 | EP0644782B1 Automated peritoneal dialysis system with detector for recognition of empty supply reservoir and tubing occlusion |
| 11/18/1998 | CN1199152A Pump element for lubricant pump |
| 11/12/1998 | WO1998050166A1 Time-controlled ecological atomizer |
| 11/11/1998 | EP0808422B1 Process and device for feeding concrete or other thick materials |
| 11/10/1998 | US5833209 Device and method for influencing the periodic stroke movement of the closing element of a valve |
| 10/29/1998 | WO1998048170A1 Dry vacuum pump |
| 10/25/1998 | CA2203708A1 Improved structure pump valve for concrete mixture pumping trucks |
| 09/29/1998 | US5813841 Hydraulic pressure control system for a pump |
| 09/24/1998 | WO1998041324A1 Pump for injecting reagent into flasks and injecting method using same |
| 09/17/1998 | DE19808724A1 Displacement piston pump |
| 09/15/1998 | US5807085 Liquid medicine supplying system with valve devices |
| 09/15/1998 | US5807075 Disposable ambulatory microprocessor controlled volumetric pump |
| 09/02/1998 | EP0695397B1 Peristaltic pump tube cassette for blood processing systems and the like |
| 09/01/1998 | US5799690 Volumetric pump valve |
| 08/25/1998 | CA2016595C Pump apparatus for biomedical use |
| 08/04/1998 | US5788342 Braking system having pump connected to two brake cylinders through respective delivery ports that are disconnected from each other in a portion of delivery stroke of the pump |
| 07/29/1998 | EP0855507A2 Volumetric pump with bi-directional sphincter seal apparatus and method |
| 07/22/1998 | EP0854285A2 Pumping device, in particular for cement material |
| 07/21/1998 | US5783451 Pipetting unit and method for liquids |
| 07/15/1998 | EP0852953A2 Peristaltic pump tube cassette for blood processing systems and the like |
| 07/14/1998 | US5779452 Positive displacement pump or motor utilizing a reciprocal sliding member to operate the suction and discharge ports |
| 07/08/1998 | CN1186912A Refrigerant compressor |
| 06/30/1998 | US5772899 Hydraulic fluids pumped by cylinder/piston/stepper assemblies independently actuate each of the diaphragm pumps, providing accurate, controllable and repeatable dispensing |
| 06/24/1998 | EP0849469A2 Twin cylinder slurry pump with a pipe switch |
| 06/23/1998 | CA2132044C Pneumatically actuated lubricant pump |
| 05/13/1998 | EP0776424A4 Direct action fluid motor and injection pump |
| 05/06/1998 | EP0840009A2 High pressure pump |
| 05/05/1998 | US5746247 Slide valve for a twin-cylinder pump for viscous fluids |
| 04/21/1998 | US5741126 Valveless metering pump with crisscrossed passage ways in the piston |
| 04/16/1998 | WO1998015735A1 Piston pump and method of reducing vapor lock |
| 04/16/1998 | DE19641771A1 Pump for viscous or pasty substances |
| 04/16/1998 | CA2268343A1 Piston pump and method of reducing vapor lock |
| 04/14/1998 | US5737994 On a motor driven piston pump |
| 03/26/1998 | DE19716030C1 Method of viscous fluid piston pump operation |
| 03/25/1998 | CN1177393A Method and device for feeding concrete or other thick materials |
| 03/19/1998 | WO1998011346A1 Pump for thick substances |
| 03/19/1998 | DE19731335A1 Viscous material pump with material issue container |
| 03/18/1998 | EP0829266A2 Automated peritoneal dialysis system |
| 03/04/1998 | EP0826109A2 Fluid pump without non-return valves |
| 03/03/1998 | US5722738 Hydraulic brake system with brake slip control and traction slip control |
| 02/04/1998 | EP0821764A1 Pump and method for manufacturing the pump |
| 01/22/1998 | WO1998002658A1 Dosing pump with magnetic control |
| 01/22/1998 | DE19624271C1 Fluid pump with pump body |
| 01/20/1998 | US5710401 Volumetric pump/valve |
| 12/10/1997 | EP0736140B1 Slide valve for a twin-cylinder pump for viscous fluids |
| 11/26/1997 | EP0808422A1 Process and device for feeding concrete or other thick materials |
| 11/20/1997 | WO1997043548A1 Hydraulic pressure control system for a pump |
| 11/20/1997 | CA2254360A1 Hydraulic pressure control system for a pump |
| 11/19/1997 | CN1165549A Pump and method for manufacturing the pump |
| 11/13/1997 | WO1997042410A1 Disposable ambulatory microprocessor controlled volumetric pump |
| 11/05/1997 | EP0805273A2 Thick matter pump |
| 11/05/1997 | EP0805272A2 Thick matter pump |
| 10/29/1997 | EP0710328B1 Continuous conveying process and device for shear-sensitive fluids |
| 10/22/1997 | EP0802325A1 Material flow control arrangement and method |
| 10/16/1997 | DE19619675A1 Rotary piston pump ball joint |
| 10/16/1997 | DE19614413A1 Rotary piston pump shaft joint |
| 09/30/1997 | US5671873 Proportioning apparatus for viscous materials |
| 09/25/1997 | DE19611079A1 Pump to extract plastic viscous material from pressurised volume |
| 08/28/1997 | WO1997031189A1 Valveless double acting positive displacement fluid transfer device |
| 08/27/1997 | EP0791126A1 Dual-piston pump apparatus |