Opposed Pumping Member Faces (e.g., Double Acting) Patents (Class 417/418)
  • Patent number: 10260490
    Abstract: In some embodiments, a solenoid-actuated pump includes a first pumping chamber and a second pumping chamber, where the first pumping chamber delivers fluid from the pump to portions of a vehicle to facilitate the operation of the vehicle. The second (or “parasitic”) pumping chamber implements a forced convection cooling method, which utilizes parasitic pumping loss to produce a flow within and/or around the solenoid coil to cool the coil and/or maintain the temperature of the coil during operation. In this manner, the second pumping chamber produces a flow that reduces thermally-related increases in electrical resistance of the solenoid coil of the solenoid-actuated pump.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: April 16, 2019
    Assignee: Synerject LLC
    Inventors: James Fochtman, John Walters
  • Patent number: 10047717
    Abstract: Wave energy converter systems include a housing comprising a field coil array and a permanent magnet array within the housing configured to induce an electrical current in the field coil array. One or more peripheral magnet arrays are arranged around the housing and couple magnetically with the permanent magnet array. The peripheral magnet arrays cause the permanent magnet array to move within the housing in response to motion of the one or more peripheral magnet arrays and provide a magnetic shielding effect.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: August 14, 2018
    Assignee: ENERGYSTICS, LTD.
    Inventor: Reed E. Phillips
  • Patent number: 9618641
    Abstract: Controller and method for determining a driving signal of a vibro-acoustic source element that is configured to generate acoustic waves in water. The method includes estimating at least one physical constraint of the vibro-acoustic source element; modeling a ghost function determined by a surface of the water; setting a target energy spectrum density to be emitted by the vibro-acoustic source element during the driving signal; and determining the driving signal in a controller based on at least one physical constraint, the ghost function, and the target energy spectrum density.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: April 11, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Benoit Teyssandier, Laurent Ruet
  • Patent number: 9243620
    Abstract: The present invention discloses a linear compressor which can rapidly overcome load and improve compression efficiency, by synchronizing an operation frequency of a linear motor with a natural frequency of a movable member varied by the load and varying a stroke of the movable member according to the load. The linear compressor includes a fixed member having a compression space inside, a movable member linearly reciprocated in the fixed member in the axial direction, for compressing refrigerants sucked into the compression space, one or more springs installed to elastically support the movable member in the motion direction of the movable member, spring constants of which being varied by load, and a linear motor installed to be connected to the movable member, for linearly reciprocating the movable member in the axial direction, and varying a stroke of the movable member according to a predetermined refrigeration force, so that the movable member can be linearly reciprocated to reach a top dead center.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: January 26, 2016
    Assignee: LG Electronics Inc.
    Inventors: Bong-Jun Choi, Chang-Yong Jang, Man-Seok Cho, Shin-Hyun Park, Hyun Kim, Jong-Min Shin, Young-Hoan Jeon, Chul-Gi Roh
  • Patent number: 8850845
    Abstract: A portable cooling unit comprising a magnetic spiral vapor pump that utilizes a magnetic pulse between two electromagnets and spiral drive slots to pull a piston back-and-forth 180-degrees and thereby alternately align compression slots on the piston's opposing ends with vapor suction ports and highly-compressed vapor discharge ports. Electromagnet use lowers the amount of battery power required for piston rotation. A condenser in a mounting pan under the pump achieves refrigerant condensation, while a fan blowing air through an evaporator positioned within a flexible hose causes cool air discharge through openings in the hose's terminal end fitting. The condenser utilizes surplus condensation from the evaporator to aid its vapor-to-liquid conversion, and batteries only provide power for the magnetic control module and fan.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: October 7, 2014
    Inventor: David Wayne Tucker
  • Patent number: 8770951
    Abstract: An air pump structured to facilitate the installation of a pair of pistons includes a casing (17) having a pair of cylinder chambers (14) slidably accommodating a pair of pistons (16), respectively, and a drive chamber accommodating electromagnets between the pair of cylinder chambers. The pump casing has mutually opposing side walls and a cylindrical peripheral wall defining the drive chamber. The side walls have circular cylindrical inner peripheral surfaces (28-1) of the cylinders defined therein, respectively. A piston assembly having the pistons connected to the opposite ends of an armature (34) is inserted into the pump casing through one of the cylindrical inner peripheral surfaces and installed therein. The peripheral wall has an electromagnet-loading opening (26-2) through which electromagnet pedestal members (26-7) and the electromagnets are inserted into the casing and secured therein.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: July 8, 2014
    Assignee: Nitto Kohki Co., Ltd.
    Inventor: Shigemitsu Ishibashi
  • Patent number: 8733095
    Abstract: In various embodiments, a mechanical assembly and/or storage vessel is fluidly coupled to a circulation apparatus for receiving pressurized heat-transfer fluid from an outlet at a first elevated pressure, boosting a pressure of the heat-transfer fluid to a second pressure larger than the first pressure, and returning heat-transfer fluid to an inlet at a third pressure.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: May 27, 2014
    Assignee: Sustainx, Inc.
    Inventors: Troy O. McBride, Benjamin R. Bollinger, Michael Neil Scott, Robert Cook, Patrick J. Magari
  • Patent number: 8591202
    Abstract: A positive displacement pumping system for use in deep wells includes a drive system and one or two pumps. The drive system may include an electrical motor or a windmill. The pump include a central hollow discharge tube and one or more vertically aligned pumping chambers in fluid communication with the central discharge tube. Within each pumping chamber, a valve arrangement, which includes a piston or shuttle member and fluid intakes, causes fluid to fill and then drain from the pumping chambers as the central hollow discharge tube reciprocates. In operation, the drive system causes the central hollow discharge tube in the pump to reciprocate and thereby cause the fluid to travel from each pumping chamber into to the central discharge tube. In the preferred embodiment, fluid is pumped on both the upstroke and downstroke of the central discharge tube.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: November 26, 2013
    Inventors: Larry Lack, Larry Lack
  • Patent number: 8550794
    Abstract: A double acting dual stroke fluid pump with pressure assists is disclosed. First and second pistons are mounted to a common shaft which reciprocates within first and second cavities during compression and suction strokes. The second piston may have a one way valve which opens and closes during the compression and suction strokes to enable the fluid pump to force fluid out of the outlet during both the compression and suction strokes.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: October 8, 2013
    Assignee: Foothill Land, LLC
    Inventor: Benjamin R. Du
  • 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
  • Patent number: 8512011
    Abstract: A fluid pump for a fuel dispensing unit comprises a pump housing with a first chamber and a second chamber, each chamber having a fluid inlet valve and a fluid outlet valve, respectively. The chambers are separated by a movable piston arranged to repeatedly decrease and increase the volumes of the chambers. The piston comprises a magnetic device, and an electromagnetic control configured to move the piston by altering a magnetic field, for repeatedly decreasing and increasing the volume of the chambers. A controllable fluid flow passage connected to first chamber and to the second chamber that allows fluid to pass from the first chamber to the second chamber without passing through the any of the fluid inlet valves or the fluid outlet valves so that when there is a flow of fuel from the first chamber to the second chamber via the fluid flow passage and when the piston moves towards the first side the first outlet valve and the second inlet valve remain closed during operation.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: August 20, 2013
    Assignee: Dresser, Inc.
    Inventors: Bengt I. Larsson, Marie Hakansson
  • Patent number: 8425209
    Abstract: A vapor recovery pump for a fuel dispensing unit, comprising a housing with two chambers each having a vapor inlet valve and a vapor outlet valve, respectively, the chambers being separated by a movable piston arranged to move a distance between a first and a second end position inside the housing for continuously decreasing and increasing the volume of the chambers. A control element is arranged to selectively vary the location of the first end position.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: April 23, 2013
    Assignee: Dresser, Inc.
    Inventor: Bengt I. Larsson
  • Patent number: 8297310
    Abstract: An air pump has an air tank (20) for temporarily storing air from a pump unit (12) before discharging the air. The air tank has a tank body having a top wall (40) on which the pump unit is placed, and a peripheral wall (42) extending downward from the top wall. The tank body has a downward facing opening. The air tank further has a metallic bottom wall member (46) engaged with the bottom surface of the peripheral wall so as to close the opening of the tank body. Bolts are passed through the metallic bottom wall member and into a metallic part of the pump unit and tightened to connect and secure the pump unit and the air tank to each other.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: October 30, 2012
    Assignee: Nitto Kohki Co., Ltd.
    Inventors: Shigemitsu Ishibashi, Atsuki Hashimoto
  • Patent number: 8152476
    Abstract: The present invention relates to positive displacement pumps, and particularly to diaphragm positive displacement pumps. An inventive diaphragm positive displacement pump is provided comprising at least one pumping chamber containing a deformable hose diaphragm, a working fluid cylinder fluidly connected to the deformable hose diaphragm, and at least one linear motor to displace the working fluid within the working fluid cylinder and thereby increase and decrease the volume of the pumping chamber. An inventive method of controlling an inventive diaphragm positive displacement pump comprising at least one pumping chamber and powered by at least one linear motor is also provided.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: April 10, 2012
    Assignee: Toyo Pumps North America Corp.
    Inventors: Matthew Babicki, Steven Noble
  • 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: 20100290937
    Abstract: A fluid pump assembly includes a double acting fluid cylinder with a housing, a piston reciprocally disposed within the housing, and a piston rod carrying the piston and extending from the housing. The piston rod has an end. A pump includes a pump body, a pressure loaded seal and a wiper seal. The pump body has a fluid inlet, a pump chamber and a rod port. The inlet is configured for receiving a fluid to be pumped and is in fluid communication with the pump chamber. The piston rod extends through the rod port and the end is positioned within the pump chamber. The pressure loaded seal is positioned within the rod port around the piston rod and has a pressure loaded end face toward the pump chamber. The wiper seal is positioned within the rod port around the piston rod on a side of the pressure loaded seal opposite from the pump chamber. The pump body further has a scavenging groove in an area between the pressure loaded seal and the wiper seal.
    Type: Application
    Filed: July 23, 2010
    Publication date: November 18, 2010
    Inventor: John F. Trout
  • Patent number: 7621723
    Abstract: A pump apparatus that produces a pumping action for a gas or a liquid is produced in an extremely small and slim form and can be favorably used as a cooling pump apparatus for an electronic appliance or the like. There is provided an electromagnetic pump where a plunger 10 including a magnetic body is provided so as to be capable of sliding inside a cylinder that is sealed at both end surfaces thereof by a pair of frames 20a, 20b with spaces between the plunger 10 and the end surfaces of the respective frames 20a, 20b as pump chambers 30a, 30b, air-core electromagnetic coils 50a, 50b are disposed around an outer circumference of the cylinder, and a fluid is conveyed by passing a current through the electromagnetic coils 50a, 50b to reciprocally move the plunger 10 in an axial direction of the cylinder, wherein intake valves 34a, 34b and outflow valves 36a, 36b that connect the pump chambers 30a, 30b and the outside are provided inside regions of the frames 20a, 20b at the end surfaces of the cylinder.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: November 24, 2009
    Assignee: Shinano Kenshi Kabushiki Kaisha
    Inventor: Masashi Okubo
  • Patent number: 7621724
    Abstract: The stator for an electromagnetic pump is designed to improve output efficiency of the pump by decreasing leakage flux. An air-core electromagnetic coil (50a, 50b) is fitted around periphery of a cylinder, and axial end faces of an electromagnetic coil (50a, 50b) are provided with yokes (26a, 26b, 26c) made of a magnetic material.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: November 24, 2009
    Assignee: Shinano Kenshi Kabushiki Kaisha
    Inventors: Fumihiro Yaguchi, Hiroaki Usui, Masaharu Tashima
  • Patent number: 7510103
    Abstract: To deliver a liquid at high speed and with high accuracy. A device for delivering a fixed quantity of liquid, comprising a pump section for metering the delivered liquid to provide a desired amount consisting of a plunger chamber formed in a cylinder block, and a plunger reciprocating in the plunger chamber, a valve section for switching between liquid flow channels for suction and delivery, a reservoir section for reserving liquid adapted to communicate with the pump section depending upon the position of the valve section, and a delivery section having a delivery port for delivering liquid, the device being characterized in that the pump section and the valve section are disposed connected to each other and that the maximum advance position of the plunger is defined by a plane where the front end surface of the plunger contacts the valve section and pump section. The valve section is removably disposed in the pump section.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: March 31, 2009
    Assignee: Musashi Engineering, Inc.
    Inventor: Kazumasa Ikushima
  • Patent number: 7419367
    Abstract: A pump for pumping one or more media comprises a housing (1) having an actuator chamber (2) and at least one pump chamber (4). The pump chamber (4) is provided with an inlet port and an outlet port. The pump chamber (4) is delimited by a displacement member (5) which is movable to and fro between a first position and a second position. The pump further comprises a movable actuator body (3), accommodated in the actuator chamber (2) and consisting of a magnetizable or magnetic material, for driving the displacement member (5). The pump also comprises magnetic drive means (8a, 8b) for creating a magnetic field in order to move the actuator body (3). The actuator body (3) is freely movable relative to the displacement member (5) so that the displacement member (5) can be moved, by means of an impact motion of the actuator body (3), from the first to the second position.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: September 2, 2008
    Inventor: Frans Lodewijk Rijnberg
  • 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
  • Patent number: 7093778
    Abstract: The invention concerns a device to convey and/or spray free-flowing media, in particular fluids, which works in accordance with the energy storage principle and is designed as an electromagnetically-powered reciprocating pump with at least one armature device as a drive element, whereby the armature device includes at least two armature elements and the armature elements are assigned magnetically corresponding yoke elements.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: August 22, 2006
    Assignee: BRP US Inc.
    Inventors: Wolfram Hellmich, Klaus-Jürgen Peter, Robert Kotter, Liang Zhang
  • Patent number: 7080792
    Abstract: A liquid pressuring device comprises a reciprocating pump (1), pressure sensor (23) and pressure control unit (25) which is adapted to control the motion of the plungers (5A, 5B) so as to make an actual delivery pressure value reach a predetermined threshold and, after reaching the threshold, control the actual delivery pressure value so as to determine an optimum feed rate, and thereafter maintain the feed rate of the plungers constant at the optimum feed rate. The pressure control means (25) may include a proportional control element for performing, after the actual delivery pressure value has reached the threshold, the proportional control of the actual delivery pressure value during a time until the plungers (5A, 5B) first reach the forward stroke end thereof.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: July 25, 2006
    Assignee: Sugino Machine Limited
    Inventors: Ryoji Muratsubaki, Osamu Honokidani, Masanori Takimae, Tadashi Sugimori
  • Patent number: 7056105
    Abstract: A unit utilizing current to control reciprocation for pushing fluids, including a chamber, a magnet, a coil connected with a circuit, a first inlet, a first outlet, a second inlet, a second outlet, a first valve and a second valve. The magnet is slidably disposed in the chamber. The coil is disposed around the chamber for driving the magnet to reciprocally move. The first inlet and first outlet are disposed at one end of the chamber. The second inlet and second outlet are disposed at the other end of the chamber. The first valve is disposed between the first inlet, the first outlet and the chamber. The second valve is disposed between the second inlet, the second outlet and the chamber. The magnet can drive the first and second valves to suck a fluid into the first and second inlets and push a fluid out of the first and second outlets.
    Type: Grant
    Filed: November 28, 2003
    Date of Patent: June 6, 2006
    Inventors: Ming-Hwa Liu, Brian D. F. Chen, Cheng-Pang Chang
  • Patent number: 7040873
    Abstract: A positive displacement pump includes a magnetostrictive actuator. A single actuator drives multiple pumping chambers. The pump may include two pumping chambers driven in phase by the linear expansion of the actuator at both its ends. The pump may include a third pumping cavity, driven by the transverse expansion and contraction of the actuator, out of phase with either cavity driven by the lengthwise extension of the actuator. A pump assembly having multiple pumps each including a magnetostrictive element is also disclosed.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: May 9, 2006
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Patent number: 6999840
    Abstract: A vacuum pump (10) includes a control device (20) for processing operational data and operational instructions. Further, the vacuum pump (10) includes a touch screen (40) serving as display for displaying the operational data callable from the control device (20) and as input for inputting operational instructions into the control device (20). The touch screen (40) includes a display panel (42) and a key panel (44) as display and the input, respectively, and is connected with the control device (20) via a data line (36). By combining the display and the input in a single device, namely the touch screen, the trouble for display and data input is reduced.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: February 14, 2006
    Assignee: Leybold Vakuum GmbH
    Inventors: Jürgen Brezina, Hermann Boy, Christian Beyer
  • Patent number: 6931983
    Abstract: A device (10) for circulating sealing gas for mechanical dry seals (11) of a centrifugal compressor (13) at times when the machine is stationary and pressurized; the device comprises a sealed reciprocating compressor (12), which includes a piston (14) slidable in a cylinder (16), and the piston (14) is moved by a magnetic coupling to an external magnetic element (20) which moves along the said cylinder (16).
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: August 23, 2005
    Assignee: Nuovo Pignone Holding S.p.A.
    Inventor: Stefano Meucci
  • Patent number: 6851938
    Abstract: A magnetic pumping system includes a pump, capable of urging a fluid therefrom during a forward stroke and a return stroke, having a piston disposed within a cylinder defined by a pump body, and a driver disposed external to the pump body. The driver is capable of moving the piston by a magnetic field interaction between the driver and the piston. The system further includes a check valve bridge, spaced away from the pump and in fluid communication with the cylinder, capable of allowing ingress and egress of the fluid into and out of the cylinder in response to a movement by the piston.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: February 8, 2005
    Assignee: Vanderbilt University
    Inventors: Yuqing Ding, M. Douglas Levan
  • Patent number: 6817409
    Abstract: A positive displacement pump for pumping fluids from a downhole formation to the earth's surface is provided. The pump first comprises a plunger. The plunger is reciprocated axially within the wellbore by a linear actuator, such as a submersible electrical pump, in order to form an upstroke and a downstroke. A pump inlet is disposed near the bottom end of the plunger, while a pump outlet is disposed near the top end of the plunger. The pump is configured such that it is able to pump a first volume of fluid upward within the wellbore during the pump's upstroke, and a second volume of fluid upward within the wellbore during the pump's downstroke. Thus, the pump is “double-acting.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: November 16, 2004
    Assignee: Weatherford/Lamb, Inc.
    Inventor: William F. Howard
  • Patent number: 6813885
    Abstract: An actuating device (1) for carrying out mechanical work by means of a slave piston rod (5) in a hydraulically-operated slave cylinder (2), where the actuating device (1) is made up of a hydraulic pump (3) integrated with a slave cylinder (2) and where the hydraulic pump (3) is driven by a linear electric motor, which consists of a pump piston (7) which is used as rotor in the linear motor at the same time as the pump piston (7) functions as a pumping piston in the hydraulic pump (3) to build up a hydraulic pressure in the slave cylinder (2).
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: November 9, 2004
    Assignee: Saab AB
    Inventors: Anders Malmquist, Peter Kjellquist
  • Patent number: 6773240
    Abstract: A fuel pump for an automotive vehicle includes a housing having an opening extending therethrough, and a piston slidably supported within the opening. A pair of end caps are mounted to the housing, thereby encasing the piston within the opening. First and second pumping chambers are defined by the opening, first and second ends of the piston, and the end caps. Each of the first and second pumping chambers has an inlet adapted to allow fuel to flow into the pumping chambers and an outlet adapted to allow fuel to flow out of the pumping chambers. A drive device is adapted to move the piston back and forth within the opening, thereby alternately increasing and decreasing the volumes of the first and second pumping chambers.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: August 10, 2004
    Assignee: Visteon Global Technologies, Inc.
    Inventor: Mike Dong
  • Patent number: 6736614
    Abstract: A reciprocating piston drive mechanism, especially for a reciprocating piston vacuum pump, includes a cylinder (3) embodied in a housing (12). A piston (4) is moved back and forth in the cylinder by an electromagnetic drive that has an electromagnet (11) on the stator side and at least one permanent magnet (18, 19) on the piston side. In order to increase service life of said drive mechanism, permanent magnets (15, 16) are also provided on the stator side. The piston permanent magnet(s) (18, 19) and the stator permanent magnets (15, 16) are configured and disposed in such a way that the piston (4) is magnetically biased to a substantially central axial position in the idle state.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: May 18, 2004
    Assignee: Leybold Vakuum GmbH
    Inventors: Rudolf Bahnen, Josef Hodapp, Gunter Knoll
  • Publication number: 20040028532
    Abstract: The invention relates to an oscillating piston pump (1), in particular to an oscillating piston vacuum pump. The invention aims to create a range of pumps of this type comprising members which exhibit a different final pressure behaviour and/or a different pumping capacities. To achieve this, the range consists of several identically constructed modules (2) of an oscillating piston pump that are connected in parallel and/or in series, according to customer requirements and each module is equipped with an oscillating piston drive.
    Type: Application
    Filed: September 3, 2003
    Publication date: February 12, 2004
    Inventors: Christian Beyer, Hermann Boy, Rudolf Bahnen, Frank Schonborn
  • Patent number: 6663361
    Abstract: A chemical injection pump for injecting chemicals into subsea system at depths up to 10,000 feet is described which uses a minimum of moving parts by employing an actuator, for instance a solenoid, to power a double acting actuator rod and plungers thereon. The pump would generate low pressures and low fluid volumes, but be more durable and reliable than conventional rotating pumps operating under subsea conditions.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: December 16, 2003
    Assignee: Baker Hughes Incorporated
    Inventors: Kristopher T. Kohl, Charles Mitchell Means
  • Patent number: 6644943
    Abstract: A reciporcating compressor with a linear motor, comprising a pair of pistons (4) provided inside a cylinder (3) and axially aligned to each other, at least one of said pistons (4) being provided with a discharge valve (10) for controlling the discharge of the gas admitted inside the cylinder (3) through said piston (4).
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: November 11, 2003
    Assignee: Empresa Brasileira de Compressores S/A Embraco
    Inventors: Dietmar Erich Bernhard Lilie, Egídio Berwanger
  • Patent number: 6626650
    Abstract: A displacement machine (10) comprises a housing (11), a reciprocating member (12) reciprocable linearly along an axis of reciprocation (13) in the housing (11) and defining with the housing (11) first (14) and second (15) variable volume chambers. A fluid inlet (17) is connected to the first variable volume chamber (14). A fluid outlet (78) is connected to the second variable volume chamber. An inlet value (16) allows flow of fluid through the fluid inlet (17) into the first variable volume chamber (14) and prevents flow of fluid from the first variable volume chamber (14) out of the fluid inlet (17).
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: September 30, 2003
    Assignee: Lotus Cars Limited
    Inventors: Steven Kenchington, Jeffrey Allen
  • Publication number: 20030143091
    Abstract: A fuel pump for an automotive vehicle includes a housing having an opening extending therethrough, and a piston slidably supported within the opening. A pair of end caps are mounted to the housing, thereby encasing the piston within the opening. First and second pumping chambers are defined by the opening, first and second ends of the piston, and the end caps. Each of the first and second pumping chambers has an inlet adapted to allow fuel to flow into the pumping chambers and an outlet adapted to allow fuel to flow out of the pumping chambers. A drive device is adapted to move the piston back and forth within the opening, thereby alternately increasing and decreasing the volumes of the first and second pumping chambers.
    Type: Application
    Filed: May 29, 2002
    Publication date: July 31, 2003
    Applicant: Visteon Global Technologies, Inc.
    Inventor: Mike Dong
  • Patent number: 6554588
    Abstract: A composite piston (30) for a vibration pump comprises a core (32), activating a piston, and a piston (34) made of plastic and obtained by means of molding on an insert formed by the core (32). The composite piston (30) thus obtained achieves objects of high precision at a low cost which cannot be achieved with traditional simple pistons made entirely of ferromagnetic metal.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: April 29, 2003
    Assignee: Ulka SRL
    Inventor: Calogero DiBenedetto
  • Patent number: 6461119
    Abstract: The present invention relates to a variable capacity helical screw compressor for compressing a gaseous medium, usually air. The compressor includes at least one lift valve (1) which connects with a first compression chamber in the compressor.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: October 8, 2002
    Assignee: Svenska Rotor Maskiner AB
    Inventor: Karlis Timuska
  • Publication number: 20020136650
    Abstract: An electromagnetic compressor capable of reciprocating a piston to suck in and compress a gas by the force of an electromagnet and the resilient force of a return spring and a manufacturing method therefor are provided. The compressor comprises a cylinder assembly including a front cylinder portion, a rear cylinder portion, and a center hole capable of storing the piston for reciprocation and having a working chamber defined by means of the piston, and an electromagnet located between the front cylinder portion and the rear cylinder portion and capable of actuating the piston. The cylinder assembly and the electromagnet have an integral structure molded from a resin in a manner such that the internal passage is hermetically sealed with respect to the electromagnet and the electrically conductive member.
    Type: Application
    Filed: May 9, 2002
    Publication date: September 26, 2002
    Inventors: Hiroto Sakurai, Masanori Nishikiori, Haruki Nakao
  • Patent number: 6422836
    Abstract: A reciprocating fluid pump includes a drive section and a pump section. The drive section has a pair of coils which may be energized to cause displacement of a reciprocating assembly. Each coil is a reluctance gap arrangement in which a magnetic circuit is interrupted by a gap towards which an armature of the reciprocating assembly is drawn when energizing current is applied to the coil. The reciprocating assembly includes an element which is extended into and retracted from a pump chamber during its reciprocating motion, causing fluid to be drawn into and expelled from the pump chamber. The pump is particularly well suited for use in cyclic pumping applications, such as internal combustion engine fuel injection. Cycle times in such applications may be reduced by appropriate control of the current waveforms applied to the coils.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: July 23, 2002
    Assignee: Bombardier Motor Corporation of America
    Inventors: William R. Krueger, Dale S. Yakel
  • Publication number: 20020004014
    Abstract: A chemical injection pump for injecting chemicals into subsea system at depths up to 10,000 feet is described which uses a minimum of moving parts by employing an actuator, for instance a solenoid, to power a double acting actuator rod and plungers thereon. The pump would generate low pressures and low fluid volumes, but be more durable and reliable than conventional rotating pumps operating under subsea conditions.
    Type: Application
    Filed: March 16, 2001
    Publication date: January 10, 2002
    Inventors: Kristopher T. Kohl, Charles Mitchell Means
  • Publication number: 20010048088
    Abstract: A precision controller of the movement of at least a first fluid, includes a precision motor. Valve apparatus is operably coupled to the precision motor. Orifice apparatus is fluidly coupled to a source of fluid and to the valve apparatus, whereby actuation of the valve apparatus by the precision motor acts to selectively expose and cover the orifice to implement fluid valving.
    Type: Application
    Filed: October 19, 1999
    Publication date: December 6, 2001
    Inventors: DENNIS L. POLLA, RONALD C. MCGLENNEN
  • Patent number: 6295662
    Abstract: A spa water delivery system comprising a reciprocating pumping structure to pump water for reception in a spa zone; and driver structure, including a solenoid body element and a solenoid plunger element, the elements being relatively movable; at least one of the elements containing passage structure to receive water in communication with water to be pumped to the zone.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: October 2, 2001
    Assignee: Softub, Inc.
    Inventors: Carsten H. Idland, Roc V. Fleishman, Peter J. Abdelkerim
  • Patent number: 6290308
    Abstract: The invention relates to a pump assembly for pumping brake fluid into a hydraulic slip-controlled vehicle brake system. To achieve a simple, compact construction of the pump assembly, the invention proposes embodying the pump assembly with an electromagnet which has a permanent magnet and is driven into an oscillating motion by being supplied with an alternating voltage; a moving part of the electromagnet is solidly connected to a tappet, both of whose ends form pistons of two piston pumps.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: September 18, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Ralf Zitzelsberger
  • Patent number: 6129527
    Abstract: A reciprocating compressor includes an electric motor having fixed and moveable components within a housing for reciprocating a moveable assembly, to compress a working fluid within a variable volume compression chamber within the housing. An integrated flexure spring and circuit connected between the housing and the moveable assembly axially and radially centers the moveable assembly within the housing, and additionally, supplies an electric current to a moveable current coil of the electric motor associated with the moveable assembly. The moveable assembly is axially reciprocated against a restoring force of the integrated flexure spring and circuit responsive to an axial force exerted on the moveable assembly by the electric motor when the electric current is supplied to the moveable current coil via the integrated flexure spring and circuit.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: October 10, 2000
    Assignee: Litton Systems, Inc.
    Inventors: Thomas S. Donahoe, Arthur Randall Nelson
  • Patent number: 5984960
    Abstract: A rotary torque-to-axial force energy conversion apparatus employs a rotatable member, a translatable member, and a magnetic coupling therebetween. The magnetic coupling converts a rotary torque on the rotatable member to an axial force on the translatable member, and includes a first permanent magnet comprising part of the rotatable member and a second permanent magnet comprising part of the translatable member. By way of example, the first permanent magnet and the second permanent magnet may each comprise interleaved, helical magnet sections of alternating polarities. A significant application of the energy conversion apparatus comprises an actuator apparatus for a ventricle assist device (VAD) or a total artificial heart (TAH). By oscillating the drive motor energizing the rotatable member, an oscillating rotary torque is achieved that is converted by the magnetic coupling to a reciprocating axial motion on the translatable member.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: November 16, 1999
    Assignee: Mechanical Technology Inc.
    Inventor: Nicholas Gerard Vitale
  • Patent number: 5960875
    Abstract: An electric pump including a linear motor consisting of a stator and a moving element driven by the electromagnetic field generated by the stator, and a pump piston driven by the linear motor, is disclosed. The piston is arranged inside the stator of the electric pump and forms the moving element of the linear motor. An oil well facility provided with such an electric pump is also disclosed.
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: October 5, 1999
    Assignee: Elf Exploration Production
    Inventors: Jean-Louis Beauquin, Jean Jacquart
  • Patent number: 5904473
    Abstract: A vacuum pump contains two rotary displacement rotor (8) that engage each other, in particular in a convoluted manner, inside in expansion chamber through which flows a stream in the axial direction. The rotors are mounted in cantilever at the delivery side and are linked each to a driving motor (35, 36). Each rotor (8) forms together with its shaft (20), a stationary bearing body (7) and a bearing (21, 22) delimited by the shaft (20) and the bearing body (7) a module that may be removed as a single unit from the housing (3). The rotor (35) of the driving motor is preferably also part of said module.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: May 18, 1999
    Assignee: SIHI Industry Consult GmbH
    Inventors: Christian Dahmlos, Dietmar Rook, Ralf Steffens
  • Patent number: 5899672
    Abstract: A positive displacement inductive pump which includes a pair of steel cylinders or sleeves having a non-magnetic corrosion resistant inner surface and non-magnetic alloy rings disposed at each cylinder end. Three ferromagnetic pole pieces having an axial opening are provided with each cylinder disposed between a respective pair of the pole pieces and connected to the pole pieces with the alloy rings. A pair of oppositely disposed steel plates connected to the pole pieces forms a magnetically conductive circuit between the pole pieces. A piston positioned within the bore defining a displacement chamber adjacent to each end of the bore. The piston includes a rod formed of magnetic material with a corrosion resistant lining encapsulating the rod. The pistons outer lining surface forms a seal with the material on the inner surface of the cylinders.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: May 4, 1999
    Inventor: Laurence R. Salamey