Plural Pumping Members In Single Pump Chamber Patents (Class 417/486)
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Patent number: 11608831Abstract: A lubricant pump for conveying lubricant from a lubricant reservoir to a pump outlet includes a pump housing with a longitudinal axis. The pump housing has a receiving opening for a pump unit, a lubricant inlet opening and a lubricant outlet opening opening into the receiving opening, a pump drive, and a pump unit with a reciprocatingly movable delivery piston. The pump unit has a suction opening, which corresponds with the lubricant outlet opening when the pump unit is inserted into the receiving opening, and an outlet opening for lubricant. A coupling mechanism for driving the at least one pump unit includes an eccentric element which is rotatable about the longitudinal axis, a drive-side coupling section connected to the eccentric element, and a pump-side coupling section. The drive-side coupling section and the pump-side coupling section can be connected to one another automatically via a resilient latching connection.Type: GrantFiled: March 13, 2020Date of Patent: March 21, 2023Assignee: BAIER & KOEPPEL GMBH & CO. KGInventors: Bernhard Koeppel, Thomas Wolf
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Patent number: 10344745Abstract: The present invention relates to a downhole hydraulic pump for providing fluid pressure during downhole operations, comprising a pump housing, a cam shaft rotatably arranged in the pump housing and having a longitudinal spin axis, the cam shaft comprising a shaft and a cam lobe arranged on the shaft, a radially arranged piston having a housing end and a cam end, a piston housing arranged in the pump housing, an inlet valve arranged in an inlet in the piston housing, an outlet valve arranged in an outlet in the piston housing, and a piston spring arranged in the pump housing for moving the piston away from the piston housing, wherein the piston housing is rotatably connected to the pump housing enabling rotation of the piston housing around a piston housing rotation axis parallel to the longitudinal spin axis of the cam shaft.Type: GrantFiled: July 4, 2012Date of Patent: July 9, 2019Assignee: Welltec A/SInventors: Jørgen Hallundbæk, Peter Gråbæk
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Patent number: 10288053Abstract: The present invention discloses an energy-saving one-dimensional compressor, comprising an air compressor, a fixing rod, a bearing plate, a condensing tube and a driving device. The air compressor comprises an inner shell and an outer shell; the inner shell comprises an upper pressing plate and a cylindrical plate; a top of the cylindrical plate is fixed under the upper pressing plate; an air inlet is formed at an upper part of the outer shell; part of a bottom of the outer shell protrudes downwards to form a cylindrical plate slot corresponding to the cylindrical plate; and the cylindrical plate can move up and down in the cylindrical plate slot. An air outlet is also formed at the bottom of the outer shell. The present invention has the beneficial effects of simple structure and high energy utilization rate.Type: GrantFiled: July 21, 2017Date of Patent: May 14, 2019Inventor: Xiaohui Chen
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Publication number: 20150147207Abstract: A linear compressor employing a piezoelectric actuator operating in resonance at a frequency substantially below its natural resonant frequency, which is usually of the order of 10 kHz. Low frequency resonance operation of the actuator, of the order of 100 Hz., is achieved by incorporating the actuator and its housing with the moving compression piston, such that the moving mass is substantially increased, and by reduction of the effective piezoelectric stiffness using hydraulic amplification of the actuator displacement. Both these procedures result in a reduction of the actuator resonant frequency. The hydraulic amplification is achieved by using a hydraulic chamber with different sized pistons, linking the actuator motion with motion of the actuator housing, to which the compressor piston is attached. The high efficiency achieved and the lack of moving parts or the need for lubricating oil makes the compressor ideal for use in high reliability and high purity applications.Type: ApplicationFiled: July 7, 2013Publication date: May 28, 2015Inventors: Sergey Sobol, Gershon Grossman
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Publication number: 20110123363Abstract: A system for pressurizing a working fluid includes a cylinder having an outlet through which the working fluid is exhausted at a discharge pressure, a plunger translatably disposed within the cylinder, and a hydraulic system. The plunger has a first piston coupled thereto, a second piston disposed opposite the first piston, wherein the second piston is driven to reciprocate, and a variable-volume chamber disposed between the first and second pistons. The hydraulic system is operable to adjust the volume of hydraulic fluid within the variable-volume chamber, whereby the discharge pressure is maintained substantially at a predetermined level.Type: ApplicationFiled: November 23, 2009Publication date: May 26, 2011Applicant: National Oilwell Varco, L.P.Inventor: Adrian Marica
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Patent number: 7946832Abstract: A dual chamber mixing pump is disclosed with two pump chambers. The chambers are defined in part by a piston having proximal and distal ends and recessed sections disposed at both ends. The pump utilizes one common driving mechanism to axially rotate and laterally reciprocate the piston to provide continuous pumping of two fluids entering through two inlets and exiting through two outlets with reduced pulsations. Alternating pulses of the two chambers and joining of two outlets provide a common outlet stream which has small segments of alternating fluid from each inlet. Such segmented streams can become more thoroughly mixed through normal flow characteristics of the downstream flow path, providing more effective mixing.Type: GrantFiled: August 2, 2007Date of Patent: May 24, 2011Assignee: Fluid Management Operations, LLCInventor: Tim Patrick Hogan
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Publication number: 20110002802Abstract: The continuous fluid delivery systems includes a fluid pumping device comprising a pump housing comprising a base member with a plurality of inlet ports and at least one outlet port and at least two pairs of opposing pistons movably associated with the housing. Each pair of opposing pistons at least in part defines a respective pumping chamber of the fluid pumping device. The pistons in each pair of opposing pistons may be independently controlled such that any one of the plurality of inlet ports or the at least one outlet port is independently selectable to be in fluid communication with one of the respective pumping chambers. A drive system may be interfaced with the respective pistons to at least reciprocally operate the pistons relative to the base member. The pump housing and the at least two pairs of opposing pistons may comprise a disposable unit.Type: ApplicationFiled: December 10, 2008Publication date: January 6, 2011Applicant: MEDRAD, INC.Inventors: Christopher D. Capone, James R. Neill, Richard A. Seman, Jason L. Bazala, Roger V. Delonga
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Patent number: 7748664Abstract: A system and method for actively manipulating fluid flow over a surface using synthetic pulsators. Synthetic pulsators produce pulsed jet operable to manipulate the primary fluid flow proximate to the synthetic pulsator. The synthetic pulsator includes a dual diaphragm synthetic jet coupled to high performance dual actuator solenoids, wherein the synthetic jet is operable to produce an oscillatory flow. The oscillatory flow of the synthetic jet(s) produces the pulsed jet operable to manipulate the primary fluid flow. These synthetic pulsators may then be actively manipulated to control the flow behavior of the ducted fluid flow, influence the inception point and trajectory of flow field vortices within the fluid flow, and reduce flow separation within the primary fluid flow.Type: GrantFiled: August 23, 2006Date of Patent: July 6, 2010Assignee: Lockheed Martin CorporationInventors: Matthew Patrick Boespflug, Seyed Gholamali Saddoughi
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Patent number: 7648349Abstract: A nutating pump is disclosed which has a modified piston and housing or casing that provides two distinct pump chambers or areas. Output from the first pump chamber is delivered during a first half of the dispense cycle or the piston movement cycle. A substantial portion of this output is held for delivery by the second chamber during a second part or half of the dispense cycle. Thus, the output generated by the pump is not altered or reduced, it is delivered over the entire piston movement cycle as opposed to prior art pumps which deliver all of the fluid during a first half or first portion of the piston movement cycle. In this way, superior pulse modification is achieved as fluid is delivered across the entire piston movement cycle as opposed to a first half or first portion of the piston movement cycle. In additional embodiments disclosed, two distinct chambers are also provided but each chamber generates its own output as the piston includes two machined or flat sections for active pumping.Type: GrantFiled: February 22, 2006Date of Patent: January 19, 2010Assignee: Fluid Management Operations, LLCInventor: Tim Patrick Hogan
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Patent number: 7544051Abstract: A pressurisation pump is provided comprising a first plunger and a second plunger, each plunger being reciprocable within a respective plunger bore defined by a housing, wherein the first and second plungers together with the bores define, at least in part, a pumping volume. The pump also includes an inlet port and an outlet port. An end of the first plunger is arranged to cover the inlet port during a pump delivery stage in which fluid is displaced from the pumping volume and an end of the second plunger is arranged to cover the outlet port during a pump fill stage in which fuel is drawn into the pumping volume. The end of the first plunger and the end of the second plunger are arranged to cover the inlet port and the outlet port respectively during a pump transfer stage during which the pumping volume is maintained.Type: GrantFiled: February 17, 2004Date of Patent: June 9, 2009Assignee: Delphi Technologies, Inc.Inventor: Geoffrey David Bootle
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Publication number: 20080089799Abstract: A device for handling a fluid to be introduced into a fluidic device is described. The fluid handling device is designed for alignment with a fluidic device, such as a microfluidic device, where an exit port on the device aligns with one or more apertures in the fluidic for exchange of fluids there between. The fluid handling device includes one or more channels, with at least two pistons spaced apart contained in one or more of the channels. The gap between neighboring pistons define a space between the pistons for containing a fluid. Movement of the pistons from a first position to a second position is effective to move fluid from the fluid handling device into the fluidic device.Type: ApplicationFiled: February 2, 2007Publication date: April 17, 2008Inventor: Michael O'Connell
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Patent number: 7048516Abstract: A fuel pump for supplying fuel at high fuel pressures includes a stationary body having a plurality of radial cylinders connecting with a central fuel chamber. Inlet and outlet passages communicate with the fuel chamber. Plungers are reciprocated in the cylinders by cam followers reciprocable in follower recesses of the body. A rotary internal cam engages the cam followers and is configured to reciprocate the plungers in timed relation to sequentially draw fuel from the inlet passage into the central fuel chamber and alternately force fuel from the central fuel chamber to the outlet passage in response to rotation of the rotary cam. A preferred embodiment includes paired smaller and larger diameter cylinders and pistons which are sequentially actuated in overlapping fashion to minimize pulsing of the pressurized fuel discharged from the pump into associated engine fuel lines.Type: GrantFiled: June 9, 2003Date of Patent: May 23, 2006Assignee: Delphi Technologies, Inc.Inventors: Eugen Maier, Michael Raymond Raney
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Patent number: 6976831Abstract: A transmissionless variable output pumping unit comprising a multiple crankshaft pump driven by a prime mover. The apparatus includes an adjustment mechanism for adjusting a phase angle between first and second crankshafts. Plungers in the pump are disposed in cylinders forming part of a pumping chamber. When the phase angle is at a minimum, the plungers operate together for maximum discharge from the pump. When the phase angle is at a maximum, the plungers operate substantially opposite one another for zero discharge. The phase angle may be infinitely adjusted between the minimum and maximum.Type: GrantFiled: June 25, 2003Date of Patent: December 20, 2005Assignee: Halliburton Energy Services, Inc.Inventor: Timothy H. Hunter
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Publication number: 20040265155Abstract: A transmissionless variable output pumping unit comprising a multiple crankshaft pump driven by a prime mover. The apparatus includes an adjustment mechanism for adjusting a phase angle between first and second crankshafts. Plungers in the pump are disposed in cylinders forming part of a pumping chamber. When the phase angle is at a minimum, the plungers operate together for maximum discharge from the pump. When the phase angle is at a maximum, the plungers operate substantially opposite one another for zero discharge. The phase angle may be infinitely adjusted between the minimum and maximum.Type: ApplicationFiled: June 25, 2003Publication date: December 30, 2004Inventor: Timothy H. Hunter
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Patent number: 6280160Abstract: A fuel injection pump of the distributor type which has a reciprocatingly driven pump piston that is load-bearing in a rotating distributor shaft which pumps fuel out of a pump work chamber to various fuel injection valves via a distributor opening. To control the duration of high-pressure injection, an electrically actuated valve is provided with a valve member in a valve chamber that communicates with the pump work chamber and from a second valve chamber, communicates with a low-pressure region. To terminate the high-pressure injection, the valve member makes a communication between the two valve chambers, whereupon the outflow of the fuel stream is controlled by disposing a diameter constriction in the connecting line, thus reducing any tendency to cavitation.Type: GrantFiled: December 9, 1999Date of Patent: August 28, 2001Assignee: Robert Bosch GmbHInventors: Heinz Nothdurft, Nestor Rodriguez-Amaya, Andreas Dutt, Hubert Greif
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Patent number: 6132187Abstract: A liquid/gas pump includes a stainless steel strip of uniform width that is encased within a flexible and liquid/gas impermeable plastic tube whose inner diameter is only somewhat less than the width of the metal strip. The tube is thus deformed to a generally elliptical shape, and the longitudinal edges of the metal strip are sealed by physical contact with the inner diameter of the plastic tube. Two elongated passageways are thus formed, one passageway being above the metal strip, and the other passageway being below the metal strip. A linear series of bistable position and somewhat overlapping shallow domes are formed into the metal strip. As one end of the plastic tube and metal strip assembly is reciprocated relative to the other end, the metal domes pop from one side of the metal strip to the other side. As a result, the volume of a first passageway increases as the volume of the other passageway decreases.Type: GrantFiled: February 18, 1999Date of Patent: October 17, 2000Inventor: Paul Leonard Ericson
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Patent number: 5934889Abstract: A pump for performing suction and discharge of a liquid, including: a cylinder supported at at least a first support point and a second support point; a piston slidably disposed in the cylinder and forming a pump chamber having a volume changeable by sliding movement of the piston; a drive shaft, the piston and the drive shaft moving in association with each other; a cam in contact with the drive shaft so that rotation of the cam drives the drive shaft to move, the piston sliding within the cylinder in association with movement of the drive shaft to perform suction and discharge of a liquid; and a cam rotational shaft rotatably supporting the cam and disposed at the first support point.Type: GrantFiled: August 21, 1996Date of Patent: August 10, 1999Assignee: Brother Kogyo Kabushiki KaishaInventor: Motohito Muraki
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Patent number: 5769616Abstract: The submerged pump according to the present invention comprises one or more modular pumping groups, each consisting of a balanced, coaxial and opposing piston couple 7 on spool wheels 10 and with a spring 12 return.Type: GrantFiled: November 13, 1995Date of Patent: June 23, 1998Inventors: Enzo Mencarelli, Giovanni Cefis
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Patent number: 5746584Abstract: In an inner cam type injection pump, the side surface of the protruding portion of each of the plungers facing the compression space is formed in a projecting shape in the area where the plunger changes from the base end side into the front end. Specific forms of the projection include a structure constituted with slanted surfaces over a plurality of stages with different inclinations relative to the axis of the plunger, an arc form and a structure provided with a overhanging portion formed on the side surface of the protruding portion, which does not overhang the base end, projecting out from the side surface. This will prevent collision at the shoulder portion of the plunger and, consequently, prevent the deformation at the shoulder portion and ensures that plungers will not have sliding failures or become seized. Even when plungers collide, the sliding of the plungers will not be affected, ensuring that plungers do not have sliding failures or become seized.Type: GrantFiled: March 6, 1996Date of Patent: May 5, 1998Assignee: Zexel CorporationInventors: Hisashi Nakamura, Kenichi Kubo, Jun Matsubara, Kazuaki Narikiyo, Hajime Machida, Noriyuki Abe, Tsunayoshi Motoyoshi, Atsushi Ueda
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Patent number: 5542827Abstract: A multiple piston hand priming pump includes a plurality of nested pistons engaged within a hollow cylindrical housing. One end of the housing has an inlet/outlet fitting leading to a pumping chamber defined within the housing and the other end of the housing is closed. Through a center bore in the closed end of the housing, a plunger activating rod extends into communication with the centermost piston of the nested plurality of pistons. The nested pistons each engage within the next circumferential piston in a manner forming a lost motion connection therewith at the end of an axial bore in the next piston to cause sequential actuation after the pumping stroke of the inner piston is completed.Type: GrantFiled: February 8, 1995Date of Patent: August 6, 1996Assignee: Navistar International Transportation Corp.Inventors: Bruce B. Dombek, Theodore F. Boone
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Patent number: 5443048Abstract: A rotary distributor type fuel pumping apparatus has two pairs of plungers housed in respective diametrical bores which intersect each other. One of the plungers is longer than the remaining plungers conveniently by providing an extension at its inner end. The extension lies in the paths of movement of the remaining plungers so as to minimize the risk of damage to the plungers.Type: GrantFiled: July 20, 1994Date of Patent: August 22, 1995Assignee: Lucas Industries Public Limited CompanyInventors: Stuart W. Nicol, Peter A. G. Collingborn, Christopher Stringfellow, Ronald Phillips
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Patent number: 4940035Abstract: The pump of the invention has application as a fuel pump for delivering fuel over a range of flow rates to an internal combustion engine. The pump may however be employed in many other applications, such as chemical applications, medical applications and hydraulic applications for example, particularyly where fine control of the fluid flow rate and a fast response from the pump to flow rate change requirements is necessary.Type: GrantFiled: November 9, 1988Date of Patent: July 10, 1990Assignee: Her Majesty the Queen in right of New ZealandInventor: Peter Waring
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Patent number: 4712985Abstract: A plunger assembly within a barrel is transversely split into two segments, with a timing fluid chamber therebetween for controllably varying the distance between the plunger segments in response to pressure applied thereto by a timing fluid introduced under variable pressure through a timing fluid inlet port. As the total length of the plunger assmebly is thus varied controllably, so is its prestroke which is the distance traversed by the plunger assembly on its compression stroke from one extreme position thereof to an intermediate position where the plunger assembly completely covers the fuel inlet port. Not only is the injection timing thus controlled by the injection pump itself, but also a high injection pressure is realized at low engine speed or under light load.Type: GrantFiled: June 27, 1986Date of Patent: December 15, 1987Assignee: Kabushiki Kaisha Komatsu SeisakushoInventors: Satoshi Wakasa, Toru Okazaki
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Patent number: 4553903Abstract: A two-stage rotary compressor makes use of a piston-vane arrangement where both stages are built end to end and where the same members (piston-vanes) work for both stages, the "axial pistons" of the second stage becoming the dividing "vanes" in the first stage.Type: GrantFiled: July 3, 1984Date of Patent: November 19, 1985Inventor: Baruir Ashikian
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Patent number: 4460319Abstract: A two-stage rotary compressor makes use of a piston-vane arrangement where both stages are built side-by-side and where the same members (piston-vanes) work for both stages, the "axial pistons" of the second stage becoming the dividing "vanes" in the first stage.Type: GrantFiled: January 25, 1983Date of Patent: July 17, 1984Inventor: Baruir Ashikian
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Patent number: 4378962Abstract: A liquid fuel injection pumping apparatus has a rotary distributor member in which is formed at least two bores which intersect and contain plungers. The plungers are moved inwardly by a cam and their ends are shaped to fit together so as to reduce the volume of fuel at their maximum extent. In order to maintain the alignment of the plungers each is provided with a slot which receives a disc-like member to maintain the relative alignment of the plungers throughout their stroke.Type: GrantFiled: June 16, 1981Date of Patent: April 5, 1983Assignee: Lucas Industries LimitedInventor: David J. C. Law
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Patent number: 4311441Abstract: A fluid displacement device is described which may be used as a pump, a motor or a device such as a vibrator for concrete. It includes a body having at least three, and preferably four or five wall portions, which are disposed one after the other along the axis of the body, discrete chambers being formed behind each wall portion, which may, for example, be a toroidal diaphragm, means being provided to feed an operating fluid under pressure to the discrete chambers to move the wall portions transversely to the axis of the body in a sequence to cause displacement of an external fluid axially of the body. When used as a motor, movement of the external fluid axially of the body will cause displacement of the wall portions and thus flow of the operating fluid so that power may be derived therefrom.Type: GrantFiled: December 28, 1979Date of Patent: January 19, 1982Assignee: Mantec Industries LimitedInventors: Frederick Scragg, Michael L. Scragg, Peter Marshman
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Patent number: 4158530Abstract: A pump having two collapsible pumping chambers connected in series is coupled to a pump drive mechanism which opens and closes each chamber in a sequence that produces pumping action.Type: GrantFiled: April 5, 1976Date of Patent: June 19, 1979Inventor: Robert E. Bernstein
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Patent number: 4139336Abstract: An apparatus having an alternately expanding and contracting chamber comprises at least one pair of cylindrical rollers each having an exterior surface in continuous rolling engagement with the surface of the other roller of the pair, the rollers being rotatable along parallel axes, and two parallel side walls, with each one of the rollers also being in continuous rolling engagement with one of the side walls. A third wall is opposite the rollers and joins the two side walls wherein the chamber is defined between these walls and the pair of rollers, and is enclosed.Type: GrantFiled: July 18, 1977Date of Patent: February 13, 1979Inventor: Walter M. Hopkins