Double Acting Pump Piston Patents (Class 417/404)
  • Patent number: 10632256
    Abstract: A drug solution administration apparatus includes an injection unit comprising an injection member configured to inject a drug solution; a delivery unit configured to be coupled to and decoupled from the injection unit, the delivery unit comprising: a delivery member configured to deliver the drug solution to the injection member, and a delivery device configured to deliver the drug solution to the delivery member; a detection unit configured to detect whether the injection unit and the delivery unit are coupled or decoupled; and a control unit configured to control operation of the delivery device. The control unit is configured to perform at least one of (i) restricting the filling operation when the detection unit detects that the injection unit and the delivery unit are coupled, or (ii) restricting the administration operation when the detection unit detects that the injection unit and the delivery unit are decoupled.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: April 28, 2020
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventor: Shohei Sasaki
  • Patent number: 9919265
    Abstract: A pump system for use in a gas dehydration system having an absorber/contactor and a reboiler is used to pump glycol or another fluid through a natural gas dehydration system. The pump system includes a gear pump connected to an electric motor for pumping glycol from the reboiler to the contactor/absorber. The motor may be powered by a thermoelectric generator that uses temperature differences in the gas dehydration system fluid to convert heat into electric energy. The pump system may also include additional pumps for moving fluid from the absorber to the reboiler, for moving a second fluid through a heat trace loop, and/or for driving peripheral components.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: March 20, 2018
    Assignee: KOLD KATCHER INC.
    Inventors: Duncan MacPherson, Terry Jacobi
  • Patent number: 9765786
    Abstract: The present invention relates to a pressure-increasing unit (1) comprising first receiving means (2) for receiving a pipeline (4) conveying pressurized gas, at least one first pipeline (3) for further transferring the pressurized gas to applications utilizing it, and second receiving means (6) for receiving a second pipeline (5) conveying reduced-pressure gas returning from the applications. The present solution is characterized in that the receiving means (6) are connected with at least one pressure intensifier (7). This pressure intensifier, in turn, is connected to the first receiving means (2) receiving pressurized gas for transferring gas re-pressurized by a substitution means (8) back to the applications utilizing it.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: September 19, 2017
    Assignee: BF+ ENERGIA OY
    Inventor: Samuli Korpela
  • Patent number: 9377010
    Abstract: A hydraulic pump jack cylinder is coupled with a closed loop hydraulic circuit, which includes a hydrostatic pump that delivers hydraulic fluid under pressure to the pump jack cylinder. The pump jack cylinder includes an inner extension piston area and an outer retraction piston area which are configured to have substantially the same area to establish a cylinder ration at 1:1. The hydrostatic pump drives the cylinder rod connected to the oil well sucker rod at a constant velocity in both the extension and retraction strokes with a quick sinusoidal turn-around at the ends of the strokes to provide a change in stroke direction. The swash plate in the hydrostatic pump brake the flow of fluid from the pump jack cylinder during retraction to prevent free-fall. A programmable logic controller controls the swash plate angles to switch stroke direction before the cylinder rod bottoms out.
    Type: Grant
    Filed: December 22, 2012
    Date of Patent: June 28, 2016
    Inventor: Kenneth B. Madgwick
  • Patent number: 9175528
    Abstract: A method and system for lifting drilling mud from subsea to a drilling vessel includes a pump having a body with a chamber, and a bladder in the chamber. The bladder spans the chamber to define water and mud sides in the chamber. A mud inlet valve allows mud into the mud side of the chamber; which moves the bladder into the water side and urges water from the water side of the chamber through a water exit valve. Pressurized water enters the chamber through a water inlet valve, which in turn pushes the bladder and mud from the chamber through a mud exit valve. The bladder separates the mud and water as it reciprocates in the chamber. A pressure control circuit equalizes pressure across the water valves, and a control valve provides a back pressure in a discharge of the pressure control circuit.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: November 3, 2015
    Assignee: Hydril USA Distribution LLC
    Inventors: Ahmet Duman, Dat Manh Nguyen, Devon Daniel
  • Patent number: 9127535
    Abstract: A deliquification pump for deliquifying a well comprises a fluid end pump adapted to pump a fluid from a wellbore. In addition, the deliquification pump comprises a hydraulic pump adapted to drive the fluid end pump. The hydraulic pump includes a first internal pump chamber and a first pump assembly disposed in the first chamber. The first pump assembly includes a piston having a first end, a second end, and a throughbore extending between the first end and the second end. In addition, the first pump assembly includes a first wobble plate including a planar end face axially adjacent the second end of the piston and a slot extending axially through the first wobble plate. The first wobble plate is adapted to rotate about the central axis relative to the housing to axially reciprocate the piston and cyclically place the throughbore of the piston in fluid communication with the slot.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: September 8, 2015
    Assignee: BP CORPORATION NORTH AMERICA INC.
    Inventors: Robert A. Coyle, William Michel, Louis-Claude Porel, Alistair Gill, Paul Ellerton, David Fielding
  • Patent number: 8757986
    Abstract: Detecting a failure mode of a fluid flow controller configured to control fluid flow between first and second chambers of a downhole positive displacement pump and a flow line, wherein the positive displacement pump comprises a piston moving in an axial reciprocating motion, and subsequently adjusting operation of the downhole positive displacement pump based on the detected failure mode such that the downhole positive displacement pump piston operates differently in different axial directions.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: June 24, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Steven Villareal, Julian J Pop, Albert Hoefel, Kent David Harms
  • Patent number: 8632322
    Abstract: A plunger pump including an airtight bellows surrounding a portion of a drive shaft to protect the drive shaft and associated seals and/or bearings from harmful fluids that are being pumped. No counter-pressure fluid exists inside the bellows, other than air, and the bellows is sufficiently rigid to withstand the pressure of the pumped fluid without collapsing. The interior of the bellows is in fluid communication with the atmosphere, negating the need for a reservoir to accommodate varying quantities of counter-pressure fluid as the pump operates.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: January 21, 2014
    Assignee: Ingersoll-Rand Company
    Inventors: Michael Conti, Kerry G. Vonalt, Jana Able
  • Patent number: 8529225
    Abstract: An electromagnetic reciprocating fluid device in which a movable member is equipped with permanent magnets, resists a torque rotating the movable member about an axis thereof in the reciprocating direction. The electromagnetic reciprocating fluid device has a pair of electromagnets facing each other, and permanent magnets disposed in a space between the opposed electromagnets and held by a movable member. When an alternating current is applied to coils formed in the electromagnets, a magnetic force is generated between the electromagnets and the permanent magnets, whereby a driving force for reciprocation is applied to the movable member. One end of the movable member is connected to a piston of a first piston-cylinder assembly, while the other end is connected to a piston of a second piston-cylinder assembly.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: September 10, 2013
    Assignee: Nitto Kohki Co., Ltd.
    Inventors: Shigemitsu Ishibashi, Haruki Nakao, Fuminori Hirose
  • Publication number: 20130094978
    Abstract: A downhole pump has a master piston having a first side and a second side in a first piston chamber. The first piston chamber has a first inlet and a second inlet for alternatingly applying fluid pressure to the first side of the master piston to move the piston toward the top of a piston stroke, and to the second side of the master piston to move the piston toward the bottom of the piston stroke. A valve is carried by the master piston that relieves fluid pressure from the respective side of the master piston once the top or bottom of the stroke is reached. There is a sequencing valve with a first state that applies fluid pressure to the first inlet and a second state that applies fluid pressure to the second inlet. The sequencing valve switches between the first state and the second state once a drop in pressure occurs. A slave piston is driven by the master piston in a second piston chamber. The second piston chamber has at least one fluid inlet and at least one fluid outlet.
    Type: Application
    Filed: July 25, 2011
    Publication date: April 18, 2013
    Inventor: Clayton Hoffarth
  • Patent number: 8360750
    Abstract: The present invention relates to a pump device with a first diaphragm pump head having two or an integral multiple of two fluid delivery chambers and diaphragms associated therewith, which are hydraulically coupled to a second diaphragm pump head. The second diaphragm pump head has two additional fluid delivery chambers and additional membranes associated therewith, which are drivable by a double-acting piston via associated diaphragm control chambers, a refilling valve being connected in each case to the diaphragm control chambers and the diaphragm control chambers being temporarily impinged with a diaphragm control pressure, which is greater than atmospheric pressure, using the refilling valve. The piston may thus be activated using a relatively small force to achieve a delivery action.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: January 29, 2013
    Assignee: Bran+Luebbe GmbH
    Inventors: Bernd Ferk, Gunnar Gode, Henning Ladiges, Dirk Petersen, Uwe Schade, Wilfried Tille
  • Patent number: 8323003
    Abstract: A pump includes a housing partially bounded by first and second outer walls, an inner wall fixed within a bore, a first piston disposed between the first outer wall and the inner wall, a second piston disposed between the second outer wall and the inner wall, a coupling member coupling the first and second pistons, a plurality of valves, and a control unit configured to communicate with the plurality of valves. Wherein One of a first inner chamber and a first outer chamber is configured to receive process fluid and the other of the first inner chamber and the first outer chamber is configured to receive working fluid, and one of a second inner chamber and a second outer chamber is configured to receive damping fluid and the other of the second inner chamber and the second outer chamber is configured to receive working fluid.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: December 4, 2012
    Assignee: Hydril USA Manufacturing LLC
    Inventors: Robert Arnold Judge, Peringandoor Raman Hariharan
  • Patent number: 8177526
    Abstract: Power and control logic configurations for gas well dewatering systems are provided. In one example, a reservoir is configured to contain hydraulic, lubricating fluid. An electric motor is configured to receive fluid from the reservoir for lubrication and a hydraulic pump powered by the electric motor is configured to receive fluid from the reservoir and pump the fluid into a hydraulic circuit. A positive displacement oscillating pump is powered by the hydraulic pump and configured to pump fluid from the reservoir to an outlet from the well. The electric motor and hydraulic pump receive the same fluid from the reservoir for lubrication and to create pressure in the hydraulic circuit, respectively.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: May 15, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael A. Dowling, Jason Kamphaus, Harryson Sukianto, Alain P. Dorel, John David Rowatt, Arthur I. Watson
  • Patent number: 8007256
    Abstract: An electromagnetic reciprocating fluid device in which a movable member is equipped with permanent magnets, resists a torque rotating the movable member about an axis thereof in the reciprocating direction. The electromagnetic reciprocating fluid device has a pair of electromagnets facing each other, and permanent magnets disposed in a space between the opposed electromagnets and held by a movable member. When an alternating current is applied to coils formed in the electromagnets, a magnetic force is generated between the electromagnets and the permanent magnets, whereby a driving force for reciprocation is applied to the movable member. One end of the movable member is connected to a piston of a first piston-cylinder assembly, while the other end is connected to a piston of a second piston-cylinder assembly.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: August 30, 2011
    Assignee: Nitto Kohki Co., Ltd.
    Inventors: Shigemitsu Ishibashi, Haruki Nakao, Fuminori Hirose
  • Publication number: 20110135514
    Abstract: A pump device includes a pulsator as a drive element for a main pump head which is situated in a delivery line and the working chamber of which is provided with a suction-side non-return valve and a pressure-side non-return valve. The working chamber of the pulsator is connected via an oscillation line, which is filled with delivery medium, to the working chamber of the main pump head in such a way that the pulsator sucks delivery medium out of the delivery line and into the working chamber of the main pump head, or presses delivery medium out of the working chamber, in an oscillating fashion. A ventilation valve is provided for ventilating the working chamber of the pulsator, and the ventilation line is a time-controlled valve and/or a pressure-controlled double-seat valve. A device may be provided for introducing a liquid into the working chamber of the pulsator and/or the oscillation line.
    Type: Application
    Filed: August 14, 2009
    Publication date: June 9, 2011
    Applicant: SPX FLOW TECHNOLOGY NORDERSTEDT GMBH
    Inventors: Christian Huhnke, Henning Ladiges
  • Patent number: 7871522
    Abstract: A system which includes a separation element (11) employing semipermeable membrane material (17), which system is designed so that it can operate either in an RO mode to produce high quality water or in a PRO mode to generate power from two aqueous solutions of different salt concentrations. In a preferred embodiment, a rotary pressure transfer device (29) is included to transfer pressure from an outlet stream exiting the separation element to an inlet stream being supplied to the separation element.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: January 18, 2011
    Assignee: Energy Recovery, Inc.
    Inventors: Richard L. Stover, Gonzalo G. Pique
  • Patent number: 7828972
    Abstract: Disclosed is a self-reciprocating energy recovery device utilized in driving of a seawater pump by self-reciprocating a piston of a power recovery chamber and recovering energy not using an electronic drive unit but using the hydraulic power of concentrated water. The self-reciprocating energy recovery device including a pair of power recovery chambers having pistons therein respectively, a high-pressure concentrated supply pipe, a low-pressure concentrated discharge pipe, and a high-pressure seawater discharge pipe to enable the power recovery chambers to recover hydraulic power supplied through the high-pressure concentrated water supply pipe and utilize the hydraulic power in driving of a seawater pump.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: November 9, 2010
    Assignee: Korea Institute of Machinery & Materials
    Inventors: Young-Bog Ham, Sang-Jin Park, Tae-Woo Kong
  • Patent number: 7789131
    Abstract: Water is removed from a natural gas well using a piston pump is driven by a power fluid that is pumped into the wellbore. The power fluid is intermixed within wellbore water and pumped out of the wellbore along with the removed water.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: September 7, 2010
    Assignee: Baker Hughes Incorporated
    Inventor: Sean L. Gaudette
  • Publication number: 20100209265
    Abstract: Power and control logic configurations for gas well dewatering systems are provided. In one example, a reservoir is configured to contain hydraulic, lubricating fluid. An electric motor is configured to receive fluid from the reservoir for lubrication and a hydraulic pump powered by the electric motor is configured to receive fluid from the reservoir and pump the fluid into a hydraulic circuit. A positive displacement oscillating pump is powered by the hydraulic pump and configured to pump fluid from the reservoir to an outlet from the well. The electric motor and hydraulic pump receive the same fluid from the reservoir for lubrication and to create pressure in the hydraulic circuit, respectively.
    Type: Application
    Filed: February 18, 2009
    Publication date: August 19, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Michael A. Dowling, Jason Kamphaus, Harryson Sukianto, Alain P. Dorel, John David Rowatt, Arthur I. Watson
  • Publication number: 20100080718
    Abstract: The invention relates to a pressure booster (1) for fluids, in particular hydraulic fluids, having a booster piston (2) which is embodied as a differential piston and having a control piston unit (5), wherein the pressure booster (1) is embodied such that the low-pressure side (NA) of the booster piston (2) can be alternately connected by means of the control piston unit (5) via a cylinder line (C) to a low-pressure feed line (P) and a discharge line (T), and the high-pressure side (HA) of the booster piston (2) can be alternately connected to a high-pressure load line (V) and a low-pressure feed line (P), and the booster piston (2) also interacts with the control piston unit (5) by means of a control line (11) in such a way that the pressure which acts in the control line (11) determines the position of the control piston unit (5), wherein the control piston unit (5) has two elements (5A, 5B) which are embodied as seat valves and which interact with in each case one valve seat (6.1 and 6.
    Type: Application
    Filed: August 20, 2007
    Publication date: April 1, 2010
    Inventor: Jesper Will Iversen
  • Patent number: 7527483
    Abstract: An expansible chamber pneumatic system, for example a fluid pump system, includes two or more double-acting diaphragm pumps, each with symmetrical left and right pump housings, each housing including an air chamber and a fluid chamber separated by a movable diaphragm. The diaphragms are connected for reciprocating movement in unison to pump fluid through their respective fluid chambers. Each pump includes an air valve actuated by Control air to direct Process air into one of the air chambers, simultaneously releasing used Process air from the other air chamber to thereby move the diaphragms, thereby to pump fluid. A pilot valve directs Control air to the air valve to position the air valve. The pilot valve is responsive to diaphragms reaching their travel limit in one direction to direct Control air to reverse the directions of Process air flow through the air valve to thereby reverse the movement of the pump diaphragms. Control air exhausts through the pilot valve to atmosphere.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: May 5, 2009
    Inventor: Carl J Glauber
  • Publication number: 20090077957
    Abstract: A hydraulic drive system comprises a hydraulic actuator comprising a piston reciprocable between two cylinder heads for actuating a machine. A flow switching device reverses the direction of hydraulic fluid flow to and from chambers on opposite sides of the piston. The piston stops at the end of each piston stroke when a shuttle valve associated with the piston opens to allow hydraulic fluid to flow between the chambers cancelling the differential pressure that acts on the piston to cause reciprocal movement. A controller is programmed to determine when the piston reaches the end of each stroke based upon at least one of hydraulic pump speed, hydraulic fluid pressure, or elapsed time, with each of these measured during each stroke. The controller then sends an electronic signal to command the flow switching device to reverse the direction of hydraulic fluid flow.
    Type: Application
    Filed: February 26, 2007
    Publication date: March 26, 2009
    Inventors: Stephen Noble, Greg Harper, Thomas Brook
  • Patent number: 7384249
    Abstract: A fluid metering system includes a housing having a piston chamber with first and second spaced ends, at least one housing inlet passage, and at least one housing outlet passage. The housing inlet and housing passages communicate with the piston chamber. A piston is disposed in the piston chamber for reciprocal movement between the first and second ends of the piston chamber to alternatingly define first and second volumes therein. At least one first slot, and at least one second slot are formed on the outer surface of the piston, and extend from respective ends of the piston toward the respectively opposite ends. The first slot has an opening that is in communication with the first volume, and the second slot has an opening in communication with the second volume.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: June 10, 2008
    Assignee: Nordson Corporation
    Inventor: Mario Romanin
  • Publication number: 20080080992
    Abstract: A fluid end for a duplex mud pump. In one implementation, the fluid end includes two liner blocks, each having a central passage. The fluid end further includes two fluid inlets disposed on a side portion and two fluid outlets disposed on a top portion and a suction manifold displaced from the two liner blocks. The suction manifold comprises four flanges. The fluid end further includes four suction valve blocks, each having a bottom portion removably coupled to one of the four flanges and a side portion removably coupled to the side portion of the liner block, and four discharge valve blocks, each having a bottom portion removably coupled to the top portion of the liner block.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Inventor: MILBURN EUGENE CUMMINS
  • Patent number: 7314081
    Abstract: A method of pumping upper production fluid from an upper level of an underground pool of production fluid and pumping lower production fluid having a higher concentration of sand from a lower level during a single pump cycle comprises providing a dual action reciprocating piston pump comprising a pump barrel and a reciprocating piston dividing the pump barrel into a lower and upper chambers. On a downstroke upper production fluid is drawn from the upper level into the upper chamber through an upper intake, and lower production fluid present in the lower chamber is forced up a tube toward ground surface. On an upstroke lower production fluid is drawn from the lower level into the lower chamber through a lower intake, and upper production fluid in the upper chamber is forced up the tube toward ground surface.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: January 1, 2008
    Assignee: 1075878 Alberta Ltd.
    Inventor: Wade Tokarek
  • Publication number: 20070286745
    Abstract: A mixing pump includes a power cylinder and a second cylinder wherein one of the power cylinder and the second cylinder is interchangeable between single and double acting and wherein a working fluid is supplied to the power cylinder under pressure.
    Type: Application
    Filed: June 9, 2006
    Publication date: December 13, 2007
    Inventor: Maynard Chance
  • Publication number: 20070286746
    Abstract: A ventless gas-driven pumping system controlled via a plurality of pneumatic valves and associated switches, for driving a diversity of process pumps at a natural gas well site. The ventless pumping system is readily interconnected with any gas pipeline location and uses flowing well gas and consequent differential pressure to drive a plurality of pumps and related pneumatic controls exclusively using a continuous self-generated air supply. Only self-generated air and no well gas is vented into the atmosphere during pumping operations.
    Type: Application
    Filed: June 8, 2006
    Publication date: December 13, 2007
    Inventors: William B. Thrasher, Mark V. Patton
  • Patent number: 7297268
    Abstract: Improvements in product water throughput from a reverse osmosis (RO) membrane achieved by thinner feed spacers in the RO element (22), enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pressure, and fluid pulsing of the RO element feed stream. These features are preferably combined to optimize the performance and cost per unit volume of water produced. The system of the invention preferably comprises a dual head reciprocating pump (20), an RO element (22) with a housing, and a differential pressure activated (“DPA”) valve (24). The DPA valve (24), in combination with offsetting fluid pressures on the two pump heads (28, 30), generate energy recovery. The frequency and amplitude of the reciprocating pump (20) create a pulse wave in the RO element (22) that improves permeate quality and throughput.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: November 20, 2007
    Assignee: MIOX Corporation
    Inventors: Rodney E. Herrington, Frank R. Hand
  • Patent number: 7244357
    Abstract: Improvements in product water throughput from a reverse osmosis (RO) membrane filter achieved by thinner feed spacers in the RO element, enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pressure, and fluid pulsing of the RO element feed stream. The system of the invention preferably comprises a dual head reciprocating pump, an RO element, and a differential pressure activated (“DPA”) valve. The DPA valve, in combination with connecting the two pump heads to reduce required pump pressures, generates energy recovery. The frequency and amplitude of the reciprocating pump create a pulse wave in the RO element that improves permeate quality and throughput. A control system preferably monitors system parameters to optimize the reciprocating pump speed and amplitude in order to obtain maximum throughput and permeate quality from any given RO element configuration. Also a highly compact, portable RO system comprising a piston and a DPA valve.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: July 17, 2007
    Assignee: MIOX Corporation
    Inventors: Rodney E. Herrington, Frank R. Hand
  • Patent number: 6841076
    Abstract: The invention concerns a method for desalting water by reverse osmosis, in particular for desalting sea water, whereby salt water at a first pressure level is introduced into a pressure compensating device, and is conveyed from the pressure-compensating device at a second, higher pressure level into a membrane module, whereby desalted water and concentrated salt water are discharged from the membrane module. In order to increase the efficiency and consequently the energy balance of such a method, the invention proposes to continuously introduce the concentrated salt water, which has been discharged from the membrane module, at a second pressure level into the pressure-compensating device, wherein it is used to subject the salt water introduced into the pressure compensating device to the second pressure level, and to discharge the salt water and convey it to the membrane module. The invention also concerns a device for implementing this method.
    Type: Grant
    Filed: March 18, 2000
    Date of Patent: January 11, 2005
    Inventor: Aloys Wobben
  • Publication number: 20040165997
    Abstract: An engine cleaning pump includes two piston heads reciprocally and movably received in two separate sleeves. When pressured air enters to force the two piston heads to move to the left, cleaning solution sucked from the fourth connector is able to flow to the first connector to carry the contaminated oil out of the engine. When the two piston heads are moved to the right, the cleaning solution forces the third ball away to pass through the oil entrance to enter the internal of the engine so as to clean the inside of the engine.
    Type: Application
    Filed: February 26, 2003
    Publication date: August 26, 2004
    Inventors: Chih-An Kuo, Chien-Li Teng
  • Patent number: 6769884
    Abstract: A hydraulic drive system is provided to produce a smoothed or near sinusoidal output flow characteristic for reciprocating piston pumps. The device occupies a smaller footprint than conventional mechanical reciprocating pumps and allows a standard reciprocating pump to operate at its maximum rated pressure while retaining its maximum rated flow. Several embodiments are disclosed and the drive system may be coupled to standard duplex and triplex pumps. A solution to hydraulic hammer caused by rapid flow reversal in the hydraulic control valves used within the system is presented.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: August 3, 2004
    Inventor: Cory L. Miller
  • Patent number: 6729860
    Abstract: Applicant provides a novel liquified booster pump. The pump takes high pressure boosted gas to a higher pressure. The pump is a pneumatically driven liquified gas booster pump with a shuttle valve enclosed within a body of the pump. Furthermore, the gas which is use to be boosted is carried from an inlet on the body of the pump to an outlet on the body of the pump, the boosted gas being carried entirely within the body of the pump with no external tubing. The pneumatically driven booster pump has a double ended piston within the central body and at least one shuttle valve incorporated in the piston for transferring gas from one side of the piston to the other.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: May 4, 2004
    Inventors: Trevor K. Markham, Glen M. Arnott
  • Patent number: 6652741
    Abstract: The present invention provides a method and an installation for filtering a liquid using a membrane filter device. The technical sector of the invention is the field of manufacturing filter devices, in particular semipermeable membrane devices. In the invention, a pump (3, 4) for pressurizing a liquid has three pistons (24, 25, 26) connected to a common shaft (23) mounted to move in translation in three chambers (18a, 18b; 19a, 19b; 20a, 20b) that are in alignment; two of said pistons (24, 26) being identical and connected to the ends of the shaft (23), each separating one of the chambers (18, 20) into two cavities (18a, 18b, 20a, 20b).
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: November 25, 2003
    Inventor: Bernard Marinzet
  • Patent number: 6623254
    Abstract: A high-pressure water pump for supplying high pressure water for atomization in the inlet stream of a gas turbine is disclosed which includes at least one hydraulic cylinder containing a piston secured to a piston rod extending from the hydraulic cylinder and defining within the hydraulic cylinder first and second hydraulic chambers on opposite sides thereof, hydraulic oil pump and solenoid valve for selectively supplying oil under high pressure alternately to said hydraulic chambers while releasing oil from the opposite chamber thereby to reciprocate said piston rod, and at least one water cylinder including a housing and a piston therein secured to the piston rod for movement therewith and defining at least one fluid chamber in the cylinder on the side of thereof opposite the piston rod; and check valves in fluid communication with said fluid chamber for allowing water to enter the chamber from a water source when the piston in the water cylinder is moved by the hydraulic cylinder in a direction which enlar
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: September 23, 2003
    Assignee: Munters Corporation
    Inventors: James M. Chowaniec, Larry E. Drummond
  • Publication number: 20030133810
    Abstract: The invention relates to a device for forming a single or multi-chamber workpiece (42) by means of high internal pressure created by a medium capable of flow in the hollow interior (5) of the workpiece. The device contains a forming tool (4) with a cavity accommodating the workpiece (42) and pressure generating equipment (1) for generating the high internal pressure. The pressure generating equipment (1) contains a displacement pump with pressure converter comprising a longitudinally coupled displacement body with different working surface areas A1, A2, which operates with a stroke frequency f, whereby strokes of the pressure converter cause a pressure p1 created on the primary side to be raised until a higher secondary pressure p2 is reached on the secondary side.
    Type: Application
    Filed: January 17, 2003
    Publication date: July 17, 2003
    Applicant: Alcan Technology & Management Ltd.
    Inventors: Christian Leppin, Markus Gehrig
  • Publication number: 20030133813
    Abstract: A gas compressor and method according to which a plurality of inlet valve assemblies are angularly spaced around a bore. A piston reciprocates in the bore to draw the fluid from the valve assemblies during movement of the piston unit in one direction and compress the fluid during movement of the piston unit in the other direction and the valve assemblies prevent fluid flow from the bore to the valve assemblies during the movement of the piston in the other direction. A discharge valve is associated with the piston to permit the discharge of the compressed fluid from the bore.
    Type: Application
    Filed: January 14, 2002
    Publication date: July 17, 2003
    Applicant: Dresser-Rand Company
    Inventors: Robert Bennitt, Dale M. George, Derek Woollatt, Timothy M. Miller, Charles Seavey, Steve Chaykosky, Jim Crimmer
  • Publication number: 20030068241
    Abstract: Fluid pump assembly driven by a reciprocating piston, having an improved coupling between a driving shaft and a driven shaft and a fast-shifting switching mechanism for changing the direction of movement of the piston.
    Type: Application
    Filed: October 5, 2002
    Publication date: April 10, 2003
    Inventors: Mark Wayne McCollough, Jim Bachman, Anna Gilbert
  • Patent number: 6491813
    Abstract: The equipment for desalination of water by reverse osmosis comprises: a pump 1 for drawing the water to be salinated, a high pressure pump 25, a cylindrical block 8 housing two pistons 3, 4 connected to one another by a shaft 5 and disposed, freely slidable and liquid-tight, within respective cylinders 6, 7 being part of the same block (8) and separated from one another by a central plate 9, the latter being liquid-tight; the equipment further comprises an exchange valve 14 controlled by the position of said pistons 3, 4, as well as a cylinder or, in general, one or more containers, possibly arranged in series, in parallel or in series/parallel 15, containing one or more reverse osmosis membranes (16).
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: December 10, 2002
    Assignee: Schenker Italia S.R.L.
    Inventor: Riccardo Verde
  • Patent number: 6435843
    Abstract: Two cylindrical pump cylinders are mounted end-to-end. A first piston is placed in the first cylinder, a second piston is placed in the second cylinder, and the pistons are interconnected. In one embodiment compressed air alternately drives the first piston in either direction, causing the interconnected second piston to draw and pump high viscosity liquid in the second cylinder through the use of check valves. In another embodiment compressed air is alternately injected into one side of the first piston and one side of the second piston, thus alternately drawing and pumping liquid on the other side of the pistons. A heating jacket is placed around the cylinder pumping the liquid to heat and thus lower the viscosity of the liquid. Piston movement sensors that sense the limits of piston movement within the cylinders are mounted in the cylinder wall.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: August 20, 2002
    Inventor: Nam Jong Hur
  • Publication number: 20020034444
    Abstract: A water-powered sump pump that utilizes a relatively higher pressure water ported through a self-reversing valve to a reversible stroke power cylinder having a movable member mechanically coupled to a pumping chamber for movement of a movable pumping member in the pumping chamber, movement of the movable pumping member forcing sump water to a discharge. The volumes of the power cylinder and pumping chamber are different such that relatively high pressure, low volume flow to the power cylinder results in relatively high volume, low pressure flow from the sump pumping chamber. The discharge from the power cylinder is backflow prevented with respect to the discharge from the sump pumping chamber.
    Type: Application
    Filed: September 21, 2001
    Publication date: March 21, 2002
    Inventor: Michael H. Ostrowski
  • Patent number: 6299766
    Abstract: Liquid filtering apparatus includes a plurality of reverse osmosis filters for receiving seriatim under pressure a mixture of feed liquid and recirculated concentrate. Feed liquid such as salt water is introduced into the inlet of each reverse osmosis filter to dilute the recirculated concentrate.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: October 9, 2001
    Inventor: Clark Permar
  • Patent number: 6210131
    Abstract: A fluid driven reciprocating apparatus having a double acting power chamber with signal rods serving as high pressure pistons, or to transmit mechanical power. The signal rods are connected to a double acting piston in the power chamber thereby eliminating the need for pilot valves, with the piston being controlled by a pair of intake-exhaust valves. The signal rod includes two spaced seals along its length with a vented space therebetween so that the driving fluid and driven fluid can't mix, and performs a switching function to eliminate separate pilot valves. The intake-exhaust valves can be integrated into a single housing with the power chamber, or these valves can be built into the cylinder head only of the power chamber, or they can be separate from the power chamber.
    Type: Grant
    Filed: July 28, 1999
    Date of Patent: April 3, 2001
    Assignee: The Regents of the University of California
    Inventor: John C. Whitehead
  • Patent number: 6158967
    Abstract: A barrier fluid seal assembly is provided for a reciprocating rod, where the reciprocation of the rod is used to pump barrier fluid through a barrier fluid chamber. The rod has first and second seals, and the barrier fluid chamber is located between the seals. Barrier fluid pressure is maintained higher than process fluid pressure so that if there is leakage past the seals, then it is barrier fluid that leaks, which keeps the seals clean and flushed. A reciprocating pump may incorporate the barrier fluid seal assembly for sealing around a plunger. A method of operating first and second reciprocating pumping cylinders provides bumpless transfer of pumping from one pumping cylinder to the other pumping cylinder. Motion controls, such as a controller using a position transducer for a hydraulic piston and a servo-valve for providing hydraulic fluid to the hydraulic piston, are used to compress liquid process fluid in one pumping cylinder prior to beginning its pumping stroke.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: December 12, 2000
    Assignee: Texas Pressure Systems, Inc.
    Inventor: Milburn Emile Dupre
  • Patent number: 6068764
    Abstract: In one embodiment a reverse osmosis permeate pump with shut off valve and reverse osmosis system employs bypassed feed water from the reverse osmosis membrane to drive a water wheel and gear set to reciprocate a piston back and forth between two chambers in the pump. Permeate from the membrane is introduced to the respective chambers by a pair of fluid inlets and discharged from the respective chambers through a pair of discharges to a storage tank. Flow through these respective inlets and discharges is a function of the direction in which the piston is moving and whether it is imparting a pressure or suction on a given chamber. A second piston is exposed to the pressure in the discharges from the chambers and the second piston moves between a position permitting incoming feed flow to the membrane, and a position blocking that flow upon increase in pressure in the fluid discharge from the chambers. In another embodiment, the reverse osmosis permeate pump is powered by an independent source of power.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: May 30, 2000
    Inventor: Yiu Chau Chau
  • Patent number: 6017200
    Abstract: An energy-recovery pump or pumping system includes, in a double action embodiment, first and second cylinders wherein respective first and second pistons, mounted to a common reciprocating piston shaft, are mounted for reciprocating motion. A hydraulic pump drives the common piston shaft back and forth in accordance with a prescribed velocity profile that includes acceleration, constant velocity, and deceleration periods, as well as a short dwell time at the conclusion of each stroke during which the shaft and pistons remain stopped. Each piston divides each cylinder into first and second working volumes. Input and output valves connect a source of fluid with an output header through half of the working volumes in such a way that the fluid is received within whichever working volume is expanding and is pumped from whichever working volume is contracting, as the pistons move back and forth within their respective cylinders during a pump cycle.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: January 25, 2000
    Assignee: Science Applications International Corporation
    Inventors: Willard D. Childs, Ali Dabiri
  • Patent number: 5909775
    Abstract: A fire fighting foam proportioner for use in providing precise proportioning of foaming agent to fire fighting liquid, e.g., water, includes a conduit incorporating a check valve and a venturi with a dual chamber piston pump having one part connected to the high pressure water source at the inlet to the conduit and the other part connected to a source of the foaming agent and arranged to pump the foaming agent through a foam conduit to the throat of the venturi where it is mixed with the water. Reversible valves responsive to pump movement are connected to the first pump part to cause it to reverse direction at the end of each stroke. A pair of one-way check valves at each of the inlet and outlet ports of the second pump part keep the foaming agent moving through the foam conduit where it is controlled by a pressure equalizing valve and a metering valve. The area of the foam conduit is controlled by the equalizing valve which includes a spool valve having pressure sensing areas at each end.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: June 8, 1999
    Inventor: Robert M. Grindley
  • Patent number: 5863188
    Abstract: A fluid flow reducing unit is incorporated in various mechanical systems to increase the mechanical advantage without the addition of energy. The fluids gaseous, liquid or mixtures thereof, are processed by the fluid flow reducing unit to increase the pressure of the effluent fluids when a higher pressure load is applied. The fluid flow reducing system can be employed in rockets, gas turbines, pump and motor systems, fire engine pumper water lines, blood pressure systems, steam engines, etc. An `Unidentified Flying Object-UFO` requires a Fluid Power Transmission to produce higher gas pressure for very rapid acceleration. The statement by Archimedes--`Give me a fulcrum on which to rest and I will move the earth.` relates to the application of a physical mechanical force on a lever arm. The application of a physical fluid pressure on a lever arm also does exist in the form of a Fluid Power Transmission means for greater thrust propulsion.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: January 26, 1999
    Inventor: James A. Dosman
  • Patent number: 5564912
    Abstract: A fluid driven pump uses a working fluid under pressure to run a pump for pumping a product fluid. The pump includes first and second cylinders positioned end-to-end. Each cylinder houses a piston, the pistons being linked so as to move together. A piston rod projects from an end of one of the cylinders and operates valve gear which alternatingly direct working fluid to opposite sides of one of the pistons, or to opposite sides of the assembly formed by the two linked pistons. This arrangement results in the reciprocating movement of the pistons which can then be used to pump the product fluid. In another embodiment, two pumps of the type described above are used with the piston rod of each being used to operate the valve gear controlling the other. In yet another embodiment, a rotary turbine, driven by working fluid under pressure and having a common shaft with the impeller of a centrifugal pump, is used to pump the product fluid.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: October 15, 1996
    Inventors: William E. Peck, Larry G. Locke
  • Patent number: 5551462
    Abstract: The cleaning and disinfection machine for medical devices with narrow channels particularly endoscopes, has a pressure chamber (1) in which the objects to be cleaned are inserted. A circulating pump of the machine supplies the pressure chamber with pressurized cleaning fluid. Arranged inside the pressure chamber (1) is a pressure-increase unit (2) that consists of a two-stage piston-cylinder arrangement (3, 5, 8; 4, 6, 9). The two pistons (5, 6) have different diameters and thus different effective cross-sections. The inlet side of the larger piston is fed with pressurized cleaning fluid. The outlet side (9) contains cleaning fluid that is supplied to the channel to be cleaned. The second piston has a smaller diameter so that the pressure is greater on the outlet side (chamber 9). When the circulating pump is switched off, the pistons (5, 6) are forced back into a starting position by a spring (13).
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: September 3, 1996
    Inventor: Hans Biermaier