Stages Driven By Relatively Movable Motor Working Members Patents (Class 417/246)
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Patent number: 11773793Abstract: Methods and systems to provide compressed air to one or more air consumers external to the engine via exhaust gases of an internal combustion engine are presented. In one example, the exhaust gas may be routed to drive an air turbine of an air compression system. The air compressed at the compression system may be stored in a tank and/or provided to the one or more air consumers.Type: GrantFiled: February 4, 2022Date of Patent: October 3, 2023Assignee: Ford Global Technologies, LLCInventors: Colby Dahl, Douglas Martin, Matthew Ryan Preston, John Rollinger, Shriram Siravara
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Patent number: 11598331Abstract: A two-stage pump system is provided using electrostatic actuators. The system includes a pair of hydraulically-amplified, self-healing, electrostatic (HASEL) actuators in fluid communication with one another. Each actuator includes a deformable shell defining a working fluid compartment storing a dielectric fluid. Two electrodes are disposed on opposite sides of the deformable shell. A pair of fluid transfer bladders are disposed adjacent the respective pair of HASEL actuators, each including a fluid-impermeable membrane defining a transfer fluid chamber, and a biasing member disposed in the transfer fluid chamber. When individually actuated in an alternating two-stage pattern, the two electrodes of each respective HASEL actuator move from a neutral position to an attracted position, displacing dielectric fluid through the first transfer conduit and between working fluid compartments, thereby pumping the transfer fluid from an inlet to an outlet.Type: GrantFiled: February 24, 2021Date of Patent: March 7, 2023Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Umesh N. Gandhi, Ryohei Tsuruta
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Patent number: 11572830Abstract: Methods and systems are provided for an air system. In one example, a system includes a boost device configured to be driven by exhaust air from a plurality of cylinder in order to compress ambient air. The compressed ambient air is delivered to a tank configured to store compressed gases.Type: GrantFiled: February 19, 2021Date of Patent: February 7, 2023Assignee: Ford Global Technologies, LLCInventors: Douglas Martin, Scott Thompson, John Rollinger
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Patent number: 11542797Abstract: A multistage plunger lift system includes an upper production tubing segment positioned in a wellbore uphole of a lower production tubing segment, with the upper segment having a greater diameter than the lower segment. A lower travelling plunger and an upper traveling plunger are sized and configured to fit and travel within the lower segment and the upper segment, respectively. A plunger lift tool is positioned in the upper segment between the upper plunger and the lower plunger, and includes within its main body a fluid passageway with a one-way valve. A plunger receptacle sleeve at the bottom end of the lift tool receives the lower plunger and includes one or more vents configured to allow fluids to flow around the lower plunger when the lower plunger is received within the plunger receptacle sleeve.Type: GrantFiled: September 14, 2021Date of Patent: January 3, 2023Assignees: Saudi Arabian Oil CompanyInventors: Amr Mohamed Zahran, Syed Muhammad Bin Syed Taha, Mohammed Ahmed Alsayed, Mohannad Yousef Almahfouz, Clint Mason
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Patent number: 10788011Abstract: A wave energy capture device, including a wave chamber arranged to engage a body of water including a plurality of waves, including a floor having a front end and a rear end, a first opening arranged proximate the front end, a second opening arranged proximate the rear end, and a hose arranged on said floor and extending from the first opening to the second opening, the hose operatively arranged to fill with water from the body of water, and a cylinder arranged on the floor proximate the front end, the cylinder connected to the wave chamber via one or more springs, wherein, when one of the plurality of waves enters the first opening, the cylinder is displaced along the floor from the front end toward the rear end, and expresses the water in the hose in a first direction from the front end toward the rear end.Type: GrantFiled: November 5, 2018Date of Patent: September 29, 2020Inventor: Loubert S. Suddaby
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Patent number: 10626710Abstract: The disclosure herein includes a peristaltic pump assembly for pumping wellbore fluid, which peristaltic pump assembly may include: a pump; a housing having a chamber; a conduit coupled to the pump and the housing, wherein fluid may be capable of ingress into the conduit from the chamber or egress from the conduit into the chamber; and a hose having a portion disposed in the chamber, wherein the portion may be capable of being compressed by fluid disposed in the chamber.Type: GrantFiled: January 23, 2019Date of Patent: April 21, 2020Inventor: Danny Javier Perez Romero
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Patent number: 10584696Abstract: The present invention relates to a subsea multipiston pump module, a subsea multistage pump and skid, having two reciprocating pistons controlled by a control means in such a way that the pistons can be driven either in a parallel mode, where the pistons are driven in phase with each other, or in a serial mode, where the pistons are driven out of phase with each other, wherein the pistons are fluidly connected with each other by a piston connection means in such a way that in parallel mode they are fluidly connected in parallel, and in serial mode, they are fluidly connected in serial. Further, the invention relates to a method of pumping a media fluid under subsea conditions.Type: GrantFiled: May 6, 2016Date of Patent: March 10, 2020Assignee: FUGRO-IMPROV PTY LTDInventors: Brendan Reid, Keith Dicker, Ben Ash
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Patent number: 10151307Abstract: A magnet pump for an auxiliary unit of a vehicle includes an inlet, an outlet, an electromagnet comprising an armature, a core, a coil and a yoke, a cylinder comprising an outlet opening, and an axial piston which moves in the cylinder. The axial piston includes first and second axial piston parts, a gap arranged between the first and second axial piston parts, and an axial through bore. A first non-return valve is biased between the first and second axial piston parts and against the axial piston. A second non-return valve is biased against the outlet opening of the cylinder. The first axial piston part is connected with/is integrally formed with the armature and is lifted off the second axial piston part. A fluidic connection exists between the inlet and the outlet via the gap when the first axial piston part is lifted off the second axial piston part.Type: GrantFiled: August 12, 2014Date of Patent: December 11, 2018Assignee: PIERBURG GMBHInventors: Andres Toennesmann, Matthias Baden, Costantino Brunetti, Michael Sanders, Andreas Koester
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Patent number: 8939732Abstract: Provided is a multi-stage compressor which includes: a first-stage compressing unit which includes a first compressing element with an impeller and a second compressing element with an impeller, the first and second compressing elements being connected to each other; and a rear-stage compressing unit which includes at least one rear compressing element with an impeller, wherein the rear-stage compressing unit receives a fluid compressed and output from the first-stage compressing unit.Type: GrantFiled: October 25, 2011Date of Patent: January 27, 2015Assignee: Samsung Techwin Co., Ltd.Inventors: Won-joong Kim, Jong-sub Shin
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Patent number: 8591199Abstract: An improved system and methodology for starting up a gas-turbine driven multi-stage compressor. The improvement involves isolating individual compression stages and creating positive pressure in each stage prior to initiating rotation of the compressor/driver system. The isolation of individual compression stages allows the turbine to reach normal operating speeds with substantially no supplemental power from an auxiliary source.Type: GrantFiled: January 11, 2007Date of Patent: November 26, 2013Assignee: ConocoPhillips CompanyInventors: Bobby D. Martinez, John R. Wolflick, Jaleel Valappil
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Patent number: 8449274Abstract: A magnetic reciprocating pump includes a tube having ends defining intake and discharge ports, first and second magnetic plungers axially aligned within the tube of corresponding cross section for reciprocation therewithin, and a plurality of longitudinally spaced coils circumscribing the tube for driving the plungers axially when electrically energized. A gap is defined between the plungers so that the first plunger is slidable between one tube end and the second plunger and the second plunger is slidable between the other tube end and the first plunger. The first plunger closes one port when moved thereagainst and has a peripheral flow path permitting flow when moved away. The second plunger closes the other port when moved thereagainst and has an outer peripheral flow path and a communicating inner axial flow path permitting flow when moved away. The plungers when moved together close the second plunger axial flow path.Type: GrantFiled: March 10, 2011Date of Patent: May 28, 2013Assignee: SIELC Technologies CorporationInventor: Yury Zelechonok
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Publication number: 20120301328Abstract: A multistage piston compressor for a gaseous or cryogenically liquefied medium with at least two compressor stages, which operatively interact with a shared drive train for purposes of joint powering, wherein each compressor stage exhibits a piston that is mechanically connected with the drive train, and arranged in a compressor cylinder so that it can longitudinally shift.Type: ApplicationFiled: November 18, 2011Publication date: November 29, 2012Inventors: Robert Adler, Martin Pfandl, Georg Siebert
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Patent number: 8292597Abstract: A gear pump comprises a casing having an inlet, an interior, and an outlet. An inlet gear is positioned at the inlet and pressurizes fluid received at the inlet. A drive gear is positioned at the outlet of the casing, the drive gear receiving fluid pressurized by the inlet gear to output pressurized fluid at the outlet. A speed-reduction gear is meshed to the drive gear and connected to the at least one inlet gear, the speed-reduction gear having a greater number of teeth than the drive gear to reduce a rotational speed from the drive gear to the inlet gear, such that the inlet gear has a lower speed that the drive gear. An input shaft is coupled to the drive gear and receives a rotational input to actuate the drive gear.Type: GrantFiled: October 16, 2008Date of Patent: October 23, 2012Assignee: Pratt & Whitney Canada Corp.Inventor: Giuseppe Rago
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Patent number: 8251678Abstract: The present invention relates to a dry vacuum pump unit capable of achieving ultimate pressure of about 1 Pa. The vacuum pump unit includes a main pump (15) disposed at an outside-pressure side, and a booster pump (16) disposed at a vacuum side. The booster pump (16) and the main pump (15) are coupled in series. The booster pump (16) has a higher pumping speed than that of the main pump (15). Each of the main pump (15) and the booster pump (16) includes a pair of pump rotors (52a and 52b), a casing (50) having an inlet port and an outlet port, and a pair of magnet rotors (54 and 54) rotatable with the pair of pump rotors.Type: GrantFiled: January 29, 2007Date of Patent: August 28, 2012Assignee: Ebara CorporationInventors: Takashi Hozumi, Nobuhito Miyashita, Takanori Inada, Kozo Matake, Yoshinori Ojima, Susumu Miyake, Katsuaki Usui
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Patent number: 8251149Abstract: A method to extract oil for a pool of oil in the ground utilizes an interconnected series of rotating helical blades extending from the surface of the ground through a canted bore to the pool of oil. The blades can be staggered and interconnected with a gear arrangement that moves oil from pool to pool and up to the surface of the ground.Type: GrantFiled: August 31, 2009Date of Patent: August 28, 2012Inventor: Michael D Anter
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Publication number: 20120093663Abstract: Pump apparatus and pump systems for use with hydrocarbon wells are actuated in response to a working fluid delivered at a high pressure to pump a fluid to be pumped or production fluid. The pump advantageously employs translation motion of a piston. Some embodiments employ working fluids at two ports. Other embodiments employ working fluid at one port and a spring. Working fluid may be provided via one or more hydraulically powered piston subassemblies, which may be controlled via one or more hydraulic power supplies. A flush system may include flush pump, flush valve and may be responsive to a characteristic of a fluid in a line.Type: ApplicationFiled: February 12, 2010Publication date: April 19, 2012Inventor: Robert Joseph Foster
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Publication number: 20100158708Abstract: A two-stage membrane pump having a first pump head and a second pump head is provided. The pump heads are typically crank operated with a camshaft set up such that one pump head is in exhaust mode and the other in inlet mode, and vice-versa, during operation. The membrane and the inlet and outlet valves of the pump heads are designed to work together, along with each pump head working synchronously such that the inlet of the second pump head and exhaust of the first pump head are sealed by the actions of the two membranes. As a result an inlet valve in the second pump head is not needed. The costs of such a pump are thereby reduced while increasing the reliability of the two-stage pump.Type: ApplicationFiled: December 19, 2008Publication date: June 24, 2010Inventors: Richard C. FUKSA, Reno G. KNUDSEN
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Patent number: 7393186Abstract: A multi-stage compressor is disclosed, which comprises: two motion converters driven by one driving shaft and converting a rotary motion to a straight-line reciprocating motion; first and second pistons (62) connected to one of the motion converters in opposite directions and moving reciprocatively in a straight line; and third and fourth pistons (72) connected to the other one of the motion converters in opposite directions, arranged at a predetermined angle with respect to the first and second pistons (62), and moving reciprocatively in a straight line, and which is characterized in that at least two of the four pistons operate for first-stage compression and at least one of the others operate for second-stage compression.Type: GrantFiled: May 31, 2002Date of Patent: July 1, 2008Assignee: LG Electronics Inc.Inventors: Xiufeng Gao, In Kyu Kim, Kyeong Ho Kim, Young Joo Bae, Yongzhang Yu, Shiyu Feng
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Publication number: 20080138214Abstract: A chemical liquid supplying apparatus capable of discharging chemical liquid with high accuracy and monitoring a leakage of an incompressible medium from a region between a piston and a cylinder is provided. A pump has a flexible tube for partitioning a pump chamber and a drive chamber, and the incompressible medium is supplied to the drive chamber by the piston reciprocating within a cylinder hole of the cylinder. A first bellows cover for forming a first seal chamber is provided between a large-diameter piston portion and the cylinder, and a second bellows cover for forming a second seal chamber is provided between a small-diameter piston portion and the cylinder. To detect pressure of the incompressible medium enclosed in the seal chambers, a seal-chamber pressure sensor is attached to the cylinder, and a deterioration degree of seal members is determined by detecting the pressure.Type: ApplicationFiled: September 18, 2007Publication date: June 12, 2008Applicant: Koganei CorporationInventor: Takeo Yajima
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Patent number: 7383967Abstract: A system for dispensing and filtering fluid is disclosed, in which the fluid flow path is substantially vertical from the fluid inlet through fluid dispense. Substantially all wetted surfaces are Teflon® or some similar non-contaminating fluid, for applications such as cleanroom processes. A valve and a filter chamber are incorporated into a pump head to simplify the flow path and reduce potential contamination points. Preferred methods, and chips or other microelectronic devices fabricated from the apparatus or methods, are also disclosed.Type: GrantFiled: November 14, 2005Date of Patent: June 10, 2008Assignee: Entegris, Inc.Inventor: Gregory M. Gibson
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Patent number: 7377312Abstract: An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime mover is provided for pumping the working fluid. A flow channel into the well bore enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area. A pumping mechanism is provided on the tool body, the pumping mechanism including first and second gerotors. The first gerotor is driven by the working fluid. The second gerotor is rotated by the first gerotor. The two gerotors are connected with a common shaft. The tool body has flow conveying portions that mix the working fluid and the produced oil as the oil is pumped.Type: GrantFiled: February 23, 2004Date of Patent: May 27, 2008Inventor: Raymond C. Davis
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Patent number: 7275592Abstract: An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime mover is provided for pumping the working fluid. A flow channel into the well bore enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area. A pumping mechanism is provided on the tool body, the pumping mechanism including first and second gerotors. The first gerotor is driven by the working fluid. The second gerotor is rotated by the first gerotor. The two gerotors are connected with a common shaft. The tool body has flow conveying portions that mix the working fluid and the produced oil as the oil is pumped.Type: GrantFiled: February 21, 2003Date of Patent: October 2, 2007Inventor: Raymond C. Davis
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Patent number: 6558134Abstract: An intensifier pump system includes a supply pump for delivering fluid products at an intermediate pressure. The products are delivered to one or more intensifier pumps that take advantage of hydraulic intensification to expel the product at high pressures to assure continuous product deployment in various systems. After an extension cycle in one of the intensifier pumps, product is delivered from the supply pump at a pressure sufficient to retract the intensifier pump and fill the chamber with fluid.Type: GrantFiled: July 27, 2001Date of Patent: May 6, 2003Assignee: Imation Corp.Inventors: Mark Serafin, LeRoy C. Erickson
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Patent number: 6558135Abstract: A two stage reciprocating piston oil free air compressor having an improved service interval. In a first stage, a first wobble piston is reciprocated in a first cylinder to compress ambient air to an intermediate pressure. In a second stage a second wobble piston is reciprocated in a second cylinder to compress the intermediate pressure air to a desired high pressure. Each wobble piston is provided with a seal which seals to the adjacent cylinder walls as the piston reciprocates and rocks. The stroke of the higher pressure second stage piston is less than the stroke of the lower pressure first stage piston to increase the operating life of the second seal, preferably to substantially the same operating life as the first seal.Type: GrantFiled: February 2, 2001Date of Patent: May 6, 2003Assignee: DeVilbiss Air Power CompanyInventor: Mark W. Wood
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Publication number: 20030082059Abstract: A molecular drag vacuum pump configured for pumping a gas stream from an inlet to an outlet, the pump including a high-speed spinning disk or rotor disposed within a housing. A passageway is formed inside the housing adjacent the disk, and gas comes in contact with surfaces of the spinning disk in successive stages, conformable wipers being disposed adjacent the spinning disk to direct the gas stream to the successive stages. The disk can be powered by an integrated motor, comprising permanent magnets associated with the disk and cooperating coils associated with the housing. The wipers can include parallel ridges on a contacting face to facilitate creation of a conformable fit with the rotor. Seal rings may be disposed against the disk between gas passageways to reduce leakage therebetween, and the pump may include regenerative pumping pockets to help prevent backflow. The housing may have a modular configuration to allow two or more pump modules to be connected and operate in series.Type: ApplicationFiled: September 17, 2002Publication date: May 1, 2003Applicant: Sarcos, LCInventors: Marc Olivier, Stephen C. Jacobsen, David Knutti
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Patent number: 6450772Abstract: A molecular drag vacuum pump configured for pumping a gas stream from an inlet to an outlet, the pump including a high-speed spinning disk having a channel formed in its edge, disposed within a housing. A passageway is formed on the inside of the housing adjacent the disk, and gas comes in contact with surfaces of the spinning disk in successive stages, conformable wipers being disposed adjacent the spinning disk to direct the gas stream to the successive stages. The disk can be powered by an integral motor, comprising permanent magnets associated with the disk and cooperating coils associated with the housing.Type: GrantFiled: October 18, 1999Date of Patent: September 17, 2002Assignee: Sarcos, LCInventors: Marc Oliver, Stephen C. Jacobsen, David F. Knutti
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Patent number: 6422838Abstract: A two-stage, permanent-magnet, integral disk-motor centrifugal pump, has a housing having first and second suction ports and first and second discharge ports, the first discharge port being connected to the second suction port. A first impeller is rotatably disposed on a shaft between the first suction port and the first discharge port and a second impeller is placed back-to-back with the first impeller and rotatably disposed on a shaft between the second suction port and the second discharge port, each of the first and second impellers having a back shroud with an array of permanent magnets fixed thereto. A first stator and a second stator are interposed between and adjacent to the first and second impellers, respectively, the rotational speed of the impellers being controlled by invertors acting upon the stators. Provisions are also included for extracting motor heat from the pump.Type: GrantFiled: July 13, 2000Date of Patent: July 23, 2002Assignee: Flowserve Management CompanyInventor: Donald P. Sloteman
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Publication number: 20010018909Abstract: A structure is made such that the number of parts of an intake valve and a discharge valve for preventing a back flow of a fuel is reduced and the number of an assembling processes and labors is reduced, without a pump function being not deteriorated. An intake valve (21) provided between an intake chamber (12) and a pump chamber (6) is constituted of a valve seat (22) protruded to an inner portion of the pump chamber (6) and a valve body (25) formed by a portion of a pump diaphragm (3) opposing to the valve seat (22), and the valve body (25) opens and closes a valve seat port (23) in cooperation with a seat surface (24) in accordance with an oscillation of the pump diaphragm (3).Type: ApplicationFiled: February 22, 2001Publication date: September 6, 2001Inventor: Norikazu Ishikawa
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Patent number: 6183211Abstract: A two stage reciprocating piston oil free air compressor having an improved service interval. In a first stage, a first wobble piston is reciprocated in a first cylinder to compress ambient air to an intermediate pressure. In a second stage a second wobble piston is reciprocated in a second cylinder to compress the intermediate pressure air to a desired high pressure. Each wobble piston is provided with a seal which seals to the adjacent cylinder walls as the piston reciprocates and rocks. The stroke of the higher pressure second stage piston is less than the stroke of the lower pressure first stage piston to increase the operating life of the second seal, preferably to substantially the same operating life as the first seal.Type: GrantFiled: February 9, 1999Date of Patent: February 6, 2001Assignee: DeVilbiss Air Power CompanyInventor: Mark W. Wood
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Patent number: 6158972Abstract: A fluid actuated fuel pump assembly including a body 12 having saucer-like sections 54 defining separate concave inlet 14 and outlet 16 hollows and a cylindrical central section 52 defining a fuel intake passage 48 for admitting fuel and extending in the opposite direction to a fuel outlet passage 50. A first pulse cover 18 is disposed over the inlet hollow 14 and a first flexible diaphragm 20 is sandwiched between the first pulse cover 18 and one saucer-like section 54 to define a first pulse chamber 22 and a first pumping chamber 24. A second pulse cover 26 is disposed over the outlet hollow 16 and a second flexible diaphragm 28 is sandwiched between the second pulse cover 26 and the other saucer-like section 54 to define a second pumping chamber 30 and a second pulse chamber 32.Type: GrantFiled: March 16, 1999Date of Patent: December 12, 2000Assignee: Federal-Mogul World Wide, Inc.Inventor: Harvey L. Ruth
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Patent number: 5755561Abstract: A pumping system in accordance with the invention comprises n (n.gtoreq.1) piston or diaphragm primary pumping modules (P1 to Pn) including each at least one pumping unit, connected by means of unidirectional valves (V11-V1n) respectively to n tanks (R1-Rn) containing fluids, a collecting head (CH) receiving the fluids delivered by the various primary modules, and a secondary piston pumping unit (S) for discharging the mixture of fluids collected in this head with a substantially constant flow rate. The pistons are shifted alternately for example by the translation motion of endless screws (9) driven by motors (12). A control set (17-20) associated with position detectors (AC1-ACn) and pressure detectors (C1 to Cn, Cs) proportion the fluids injected and adjust the phases, the piston strokes and their velocities in order to obtain a substantially constant discharge rate. Each primary module can also comprise a second pumping module also allowing a constant rate to be obtained during the suction phase.Type: GrantFiled: October 26, 1995Date of Patent: May 26, 1998Assignees: Francois Couillard, Institute Francais du PetroleInventors: Fran.cedilla.ois Couillard, Dominique Garnier
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Patent number: 5049038Abstract: A two stage fluid compressor is operated by a pneumatically operated relay valve controlled by a fluidic switching device in which switching pulses of pressurized control air are obtained automatically on movement of a compression piston in one of the compression stages.Type: GrantFiled: October 10, 1990Date of Patent: September 17, 1991Assignee: Normalair-Garrett (Holdings) Ltd.Inventor: Robin H. J. Searle
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Patent number: 5020974Abstract: A fluid compressor includes a plurality of compression stages each operated sequentially by drive means comprising a pneumatically operated drive piston operating in a drive cylinder. Several embodiments are described and illustrated having different forms of control means and drive and sequencing means for the drive pistons.Type: GrantFiled: October 31, 1989Date of Patent: June 4, 1991Assignee: Normalair-Garrett (Holdings) LimitedInventor: Robin H. J. Searle
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Patent number: 4784579Abstract: Disclosed herein is a hydraulic to pneumatic power transfer unit which converts a high pressure oil flow into a flow of high pressure air by means of three stages of piston pumps and characterized by a first stage having a pair of linked pistons of substantially equal size both supplying air to a second stage piston which is directly linked to a third stage piston so that the pair of second and third stage pistons work alternately with the pair of first stage pistons and the linkage between each pair of pistons actuate spool valves which control the motion of the other pair of pistons.A further improvement is also disclosed in which an internal oil reservoir and a swash-plate pump is added to the system so that it may be powered by a rotating shaft instead of a flow of oil. In addition, the pulses of oil produced by the swash-plate pump directly control the piston pairs without the need for spool valves.Type: GrantFiled: December 19, 1986Date of Patent: November 15, 1988Assignee: Allied-Signal Inc.Inventor: Raymond W. Gazzera
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Patent number: 4714411Abstract: A fluid pressure intensifier device particularly suited for intensifying the pressure of a gas has a plurality of piston and cylinder compression stages of sequentially reducing volume connected by flow passages (FIG. 5b) for conducting fluid to be pressure intensified sequentially through the compression stages. Individual pressure fluid powered driving mechanisms for each piston or cylinder compression stage comprise driving piston and cylinder assemblies controlled to operate in sequence by a rotatable port plate. The port plate is rotatable by a positive displacement pressure fluid motor actuated by the pressure fluid powering the driving piston and cylinder assemblies, the outer gear of the motor being constituted by the rotatable port plate.Type: GrantFiled: June 16, 1986Date of Patent: December 22, 1987Assignee: Normalair-Garrett (Holdings) LimitedInventor: Robin H. J. Searle
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Patent number: 4679986Abstract: An energy-conserving refrigeration apparatus which employs a atmospheric pressure and vacuum-pressure actuated partial compressor for a refrigerant gas in combination with a conventional prime mover-driven compressor and also achieves lower compressor head pressure and increased condenser cooling of the refrigerant gas.Type: GrantFiled: November 20, 1984Date of Patent: July 14, 1987Inventor: Milburn E. Dupre
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Patent number: 4600365Abstract: A low-pulsation displacement pump comprises two series-connected cylinders which are controlled by valves so that the delivery takes place only in one direction. The pistons of the cylinders are controlled through cams which are driven jointly at a constant velocity. The cams are so formed that the transition phase preceding the delivery phase (in the direction of delivery) of the after-cylinder is longer than the transition phase preceding the delivery phase (delivery direction) of the forward cylinder. In another embodiment, the transition phase preceding the delivery phase of the after-cylinder is greater than 60.degree.. A further embodiment comprises combining the transition phase preceding the delivery phase of the after-cylinder with an isocratic phase and an overlapping phase.Type: GrantFiled: April 4, 1985Date of Patent: July 15, 1986Assignee: Gynkotek Gesellschaft fur den Bau wissenschaftlich technischer Gerate m.b.H.Inventor: Hansjurgen Riggenmann
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Patent number: 4093403Abstract: Disclosed herein is a fluid-actuated, diaphragm pump which is particularly adaptable for use as a fuel pump for a multi-cylinder, two-cycle internal combustion engine and which includes an inlet chamber, an outlet chamber, a first diaphragm separating the inlet chamber into a first pulse chamber and a suction chamber, and a second diaphragm separating the outlet chamber into a second pulse chamber and a pressure chamber. The two pulse chambers are connected to separate sources of regularly cycling or pulsating pressures which are at least 90.degree. out of phase from each other and the two diaphragms are oscillated sequentially, in response to the pressure variations in the respective pulse chambers, between a suction position and a pumping position whereby fluid is first drawn into the suction chamber through an inlet, subsequently pumped therefrom into the pressure chamber, and then pumped from the pressure chamber through an outlet.Type: GrantFiled: September 15, 1976Date of Patent: June 6, 1978Assignee: Outboard Marine CorporationInventors: Carl F. Schrimpf, Russel J. Van Rens
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Patent number: 4003679Abstract: A pumping system is provided in which a low pressure metering pump injects fluid charges into a high pressure pump which in turn operates into a high pressure load. The high pressure pump is designed to always present a low pressure at its input on its intake stroke. This insures that the metering pump will always operate into a low pressure regardless of the load, and will therefore be enabled to always accurately meter charges into the high pressure pump.In various embodiments, the high pressure pump and/or the low pressure pump include spring elements for providing well defined pumping pressures.In some embodiments, an oil reservoir and diaphragm provide a well defined pressure against which the metering pump can operate.Type: GrantFiled: April 2, 1975Date of Patent: January 18, 1977Assignee: Hewlett-Packard CompanyInventor: Douglass McManigill