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| Number | Title | Issue Date |
| 7648348 | Dewatering apparatus A submersible water pump and a dewatering system comprising the submersible pump. The submersible water pump includes a housing and an outer tube. The housing includes a housing dividing wall and a cylinder head having a bore therethrough through which the outer tub... | 01/19/2010 |
| 7413418 | Fluidic compressor A compressor system that is configured to compress the fluid from low pressure source to a higher pressure magnitude is powered from the same low pressure fluid source. The compressor system includes two piston assemblies that are coaxially coupled to one another, a... | 08/19/2008 |
| 7337805 | Valve with adjustable stop An adjustable mechanism for a valve or actuator is provided. The adjustable mechanism cooperates with one or more pistons, which in turn cooperates with a valve element to limit the axial displacement of the valve element relative to the valve seat. The adjustable m... | 03/04/2008 |
| 7270185 | Drilling system and method for controlling equivalent circulating density during drilling of wellbores A drilling system for drilling subsea wellbores includes a tubing-conveyed drill bit that passes through a subsea wellhead. Surface supplied drilling fluid flows through the tubing, discharges at the drill bit, returns to the wellhead through a wellbore annulus, and... | 09/18/2007 |
| 7185719 | Dynamic annular pressure control apparatus and method A drilling system for drilling a bore hole into a subterranean earth formation, wherein at least a portion of the mud flow from the primary mud pump is diverted to the mud discharge outlet, thereby creating a backpressure system to readily increase annular pressure.... | 03/06/2007 |
| 7168927 | Pressure exchanger system A pressure exchanger system having at least two tubular chambers, in which a plurality of reversing valves reverse the flow paths of fluid flows through the at least two tubular chambers. At least one driven reversing valve alternately reverses the flow paths betwee... | 01/30/2007 |
| 7118352 | Hydraulic metering device The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by an evacuation valve. The piston is driven forwardly through ... | 10/10/2006 |
| 7096854 | Fuel injection device for internal combustion engines A fuel injection device includes an injection valve connected in an injection line for the fuel and having a nozzle chamber and a control chamber that are both connected to the injection line, an on-off valve for switching back and forth between a lower injection pr... | 08/29/2006 |
| 7036346 | Apparatus for exposing a pipeline to high internal pressure An apparatus for exposing a pipeline to a high internal pressure of the order of 1000 to 15000 bar, having at least a first, substantially stationary receiving device for a first end of the pipeline and a second receiving device for a second end of the pipeline, whe... | 05/02/2006 |
| 7007456 | Dual chamber pump and method Disclosed is a pneumatically powered high-pressure and lightweight fluid pump. The pump is useful for pumping fuel for liquid rocket engines and for pumping water, such as for fire suppression. During operation of the pump, liquid is drained from a tank into a pump ... | 03/07/2006 |
| 7003838 | Hydraulic pig advance system comprising a control volume chamber containing hydraulic fluid and a force transmitting member This invention relates to a hydraulic pig advance system comprising a control volume chamber containing hydraulic fluid and a force transmitting member. The system further comprises two directional control valves which can be selectively repositioned to cause hydrau... | 02/28/2006 |
| 6966367 | Methods and apparatus for drilling with a multiphase pump The present invention generally relates to an apparatus and method for removing hydrocarbons and other material from a wellbore. In one aspect, a method of drilling a sub-sea wellbore is provided. The method includes circulating a drilling fluid through a drill stri... | 11/22/2005 |
| 6948917 | Valving system for a downhole hydraulically actuated pump An engine for actuating a hydraulic downhole pump having a piston vertically reciprocated in a cylinder includes a reversing valve carried with the power piston and serving, when in a first position, to direct fluid flow to force the piston upwardly and in a second ... | 09/27/2005 |
| 6929023 | Back flow prevention device for pipelines conveying fluids A back flow prevention device is shown for use in a plastic pipeline for conveying water, sewage, hydrocarbons or other fluids. A valve body features a flow control mechanism which is formed entirely or primarily of plastic materials. The valve body and its opposing... | 08/16/2005 |
| 6920942 | Method and apparatus for directly controlling pressure and position associated with an adjustable choke apparatus A hybrid choke control system wherein the traditional choke experience is manifest in auditory and visual feedback mechanisms which are emulated by a digital control system enabling direct control of either position or back pressure associated with an adjustable cho... | 07/26/2005 |
| 6904982 | Subsea mud pump and control system A sub-sea mud pump system includes a plurality of pump units, and each pumping unit includes a plurality of pumping elements. Each pumping element includes a pressure vessel with a first and a second chamber, a separating member between the first and second chambers... | 06/14/2005 |
| 6886720 | Metering device A metering device that includes a housing defining a cylindrical chamber containing a reciprocating shuttle. The two opposed end parts of the chamber are interconnected by fluid flow ducts to a cylindrical valve bore. Contained with the valve is a rotary valve rod d... | 05/03/2005 |
| 6790014 | Fluid cooled diaphragms for diaphragm compressors Fluid cooled diaphragms for diaphragm compressors are provided which utilize a multi-layer diaphragm with an upper or gas contacting later, and a bottom or lower layer, which has cooling grooves through which cooling fluid is circulated to reduce the diaphragm tempe... | 09/14/2004 |
| 6749403 | Methods for controlling a pump's flow rate by pulsed discharge Methods and systems are disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided withi... | 06/15/2004 |
| 6619932 | Restarting device of a pump change-over valve which induces a pressure difference within the pump change-over valve to remove the latter from an intermediate stalled position A restarting device of a pump change-over valve in a pump is provided, in which the pump includes; a pump main body 1 and a change-over valve 2. The change-over valve 2 is provided with a pair of pressure chambers 31 and 32 formed at respective ends on th... | 09/16/2003 |
| 6604908 | Methods and systems for pulsed delivery of fluids from a pump A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within... | 08/12/2003 |
| 6568922 | Pump cylinder and method of collecting pasty materials, liquids, gases and/or mobile objects A pump cylinder in which a pump plunger is guided which divides the cylinder into a forward and a rearward subspace, which, in the forward subspace, has a connection for taking in the fluid medium to be delivered, the rearward subspace of the pump cylinde... | 05/27/2003 |
| 6558128 | Fluid well pumping system A fluid pumping system includes a number of stages. Each stage has a fluid chamber having a top end with an air aperture and a bottom end with a fluid apertures. An air line is connected to the air aperture, and a fluid input conduit, with an input check ... | 05/06/2003 |
| 6499288 | Pressurizer for a rocket engine The present invention provides for a pressurizer for pressurizing a fluid, comprising a pressurant entrance for the introduction of a pressurant, a fluid entrance for the fluid, a fluid exit for the fluid, and a transfer chamber movable in a cycle with re... | 12/31/2002 |
| 6464476 | Linear pump and method The linear pump (10,110) includes a housing (12, 112) and either two(20, 22) or one (120) flexible bladders each within a pump housing and interconnected to respective end caps (30, 32, 130, 132, 134, 136). Upon movement of a movable end cap relative to a... | 10/15/2002 |
| 6446909 | Reciprocating chemical muscle(RCM) and method for using same A preferred apparatus for generating power from a non-combustive chemical reaction with the power being sufficient to enable motion of the apparatus includes a reaction chamber containing a catalyst that is configured to receive monopropellant fuel. The c... | 09/10/2002 |
| 6305913 | Pressure processing a pumpable substance with a flexible membrane An apparatus and method for pressure processing a pumpable substance, such as a pumpable food product or slurry. In one embodiment, the apparatus includes a pressure vessel having an inlet valve toward one end and outlet valve toward the other end. A flex... | 10/23/2001 |
| 6183216 | Arrangement for long-distance conveying of thick matter The invention concerns an arrangement for conveying thick matter, in particular liquid concrete. The arrangement comprises a pump (12) which is to be charged on the input side with thick matter to be conveyed, and a distributor (10) which can be connected... | 02/06/2001 |
| 6179583 | Metered fluid delivery device A metering device for pressurized fluids has a rotor containing an oscillating free piston operating in a bore at right angles to the rotor axis. The piston is driven by the fluid to be metered. The rotor is retained within a stator having inlet and outle... | 01/30/2001 |
| 6102673 | Subsea mud pump with reduced pulsation A positive-displacement pump includes multiple pumping elements, each pumping element having a pressure vessel with a first and a second chamber and a separating member disposed between the first and second chambers. The first chambers and the second cham... | 08/15/2000 |
| 6099269 | Absorption refrigeration system having a diaphragm pump and a hydraulic piston pump A device for pumping an absorbent solution from the low pressure side of an absorption heat exchange system to the high pressure side of that system without relying on pressure from the low pressure side. The device preferably includes a diaphragm pump di... | 08/08/2000 |
| 6086338 | Water jet intensifier pump having a piston arrangement with a ceramic liner An intensifier pump for a water jet pump includes an exterior cylinder having a fluid inlet port and a fluid outlet port. A valve is disposed at the fluid outlet port. The intensifier pump includes a piston head and a plunger disposed within the exterior ... | 07/11/2000 |
| 6017198 | Submersible well pumping system The invention generally concerns a submersible well pumping system comprising an axially elongated housing having a diameter less than the bore hole of the well, a multi-chamber hydraulically driven diaphragm pump, suspended in the well using coiled tubin... | 01/25/2000 |
| 5964580 | Positive displacement pump having a ratchet drive guide for dispersing cyclic compression stresses over the circumference of an internal flexible member A positive displacement pump includes a deformable hollow member for delivering a subject liquid by a cycle of contraction and restoration of its volume, a casing which contains the hollow member, and a pressurizing device for supplying and evacuating a h... | 10/12/1999 |
| 5961299 | Fluid injector pump with interchangeable reservoir A pneumatically-operated pump is provided that includes a body having a central bore with a liquid chamber for a slidable piston injector, a chamber for a removable reservoir, and an inlet and outlet for a gas. A priming conduit carries liquid from the re... | 10/05/1999 |
| 5934885 | Reagent pump assembly A reagent pump assembly for metering precise volumes of fluids, such as reagent, for an analytical instrument, such as a clinical hematology or flow cytometer instrument. The assembly includes a multilayer block having a plurality of diaphragm pumps inter... | 08/10/1999 |
| 5876189 | Pumped fluid metering device for the precise feeding of a fluid A metering device for the precision feeding of a liquid, such as, for example, an oil lubricant. The device has a fluid supply chamber with a working medium such as oil and which in turn is in open communication with a metering chamber also containing the... | 03/02/1999 |
| 5842839 | Liquid supply system A liquid transfer system for liquids that are subject to solidification uses a pipeline, with compressed gas as the liquid displacement medium. The pipeline comprises a substantially rigid outer line and a flexible inner hose, forming with the outer line ... | 12/01/1998 |
| 5807083 | High pressure gas compressor A low pressure compressor drives a hydraulic pump coupled to a main compressor for producing a relatively high pressure gas output. A plurality of pistons coupled to a single shaft is driven by gas from a low pressure compressor. A hydraulic piston is cou... | 09/15/1998 |
| 5797429 | Linear spool valve device for work exchanger system A linear spool valve device is employed in a work exchanger system for directing flow of fluid therein. The device comprises a cylinder in which first and second pistons are movably disposed, a high pressure inlet located at substantially a central point ... | 08/25/1998 |
