Reciprocating Rigid Stages Patents (Class 417/254)
  • Patent number: 11454231
    Abstract: A reciprocating gas horizontal compressor with free lifting piston, which includes a piston with straight ends and inclined compression chambers, a crankcase in which are mounted a crankshaft, a connecting rod fixed to a cross head thru a bolt which alternately drives in a cross-head body a piston rod, and a cylinder body which contains a cylinder liner in which is moving rectilinear and alternatively an improved piston provided with straight ends and compression chambers inclined in areas (m) and (k), with the same angle and in the same plane as a zone (p) from a first cylinder head element and respectively in a zone (n) from a second cylinder head element, and some magnets fixed to the piston and some magnets fixed outside and to a lower part of the cylinder liner, through which the piston is free lifting on the stroke length with reduced friction.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: September 27, 2022
    Assignee: COMPRESSOR PUMP INDUSTRIAL SRL
    Inventor: Marian Prodan
  • Patent number: 11428226
    Abstract: A multistage compression system uses refrigerant and oil. The multistage compression system includes a low-stage compressor that compresses the refrigerant, a high-stage compressor that further compresses the refrigerant compressed by the low-stage compressor, refrigerant pipes that-introduce the refrigerant compressed and discharged by the low-stage compressor into a suction part of the high-stage compressor, a pressure reducing element disposed between the refrigerant pipes, an accumulator disposed between the refrigerant pipes at a downstream side of the pressure reducing element and at an upstream side of the high-stage compressor, and an oil discharge pipe. The oil discharge pipe discharges the oil in the low-stage compressor. The oil discharge pipe connects the low-stage compressor and a portion of the refrigerant pipes. The portion of the refrigerant pipes is on a downstream side of the pressure reducing element and an upstream side of the accumulator.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: August 30, 2022
    Assignee: Daikin Industries, Ltd.
    Inventors: Yousuke Ohnishi, Masaaki Adachi, Mikio Kajiwara, Naoto Tomioka, Yohei Nishide, Daisuke Okamoto
  • Patent number: 11168679
    Abstract: A compressor for a compressed-air feed of a compressed-air supply installation, for operating a pneumatic installation, includes: a first compression space; a second compression space; an air feed port; a compressed-air outlet; and a piston having a first face side, which is subjectable to pressure and which is directed toward the first compression space, and a second face side, situated opposite the first face side, which is subjectable to pressure and which is directed toward the second compression space, the first compression space being delimited by the first face side and the second compression space being delimited by the second face side. The first face side includes a full side and the second face side includes a step side. The piston is attached via a connecting rod to a drive. The first compression space and the second compression space are connected to one another via a connecting line.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: November 9, 2021
    Assignee: ZF CV SYSTEMS EUROPE BV
    Inventors: Jonas Wichern, Klaus Bredbeck, Uwe Stabenow
  • Patent number: 11162517
    Abstract: Disclosed is a liquid chromatography solvent pump including a motor, a first piston, a second piston, and a variable output drive system coupling the motor to at least one of the first piston and the second piston. The variable output drive system includes a gearbox configured to provide a non-equal ratio between an input from the motor and an output delivered to at least one of the first piston and the second piston. The first piston and the second piston are configured to deliver a flow of solvent in a liquid chromatography system.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: November 2, 2021
    Assignee: WATERS TECHNOLOGIES CORPORATION
    Inventors: Jeffrey Musacchio, Joseph Michienzi
  • Patent number: 11118578
    Abstract: A hydraulically operated compressor has a fixed piston and a fixed compression or outer cylinder. A drive or intermediate cylinder is located between the piston and outer cylinder. A compression chamber is formed between the drive cylinder and the outer cylinder. Drive fluid is pumped into and released from an interior chamber in the drive cylinder to reciprocate the drive cylinder. The drive fluid also provides cooling to the interior of the compressor.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: September 14, 2021
    Inventor: Wayne A Wolf
  • Patent number: 10823163
    Abstract: Air pumps having an assembled configuration and a disassembled configuration. Particular embodiments described herein include air pumps with a reservoir housing that comprises two or more reservoir housing portions. Each reservoir housing portion couples to another reservoir housing portion in the assembled configuration and decouples from that reservoir housing portion in the disassembled configuration to provide for improved storage of the air pump when not in use.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: November 3, 2020
    Inventors: Jonathon Piel Garrett, James Aloysius Garrett
  • Patent number: 10240589
    Abstract: A plunger electric fuel pump includes a cylinder; a plunger; a pump body; a movable element to which the plunger is connected; a fixed core provided so as to face the movable element; a rotational core including a permanent magnet; an electric motor configured to rotate the rotational core; and a spring configured to urge the movable element in a direction away from the pump body. The rotational core and the fixed core are provided with a switching portion configured to switch between a first state and a second state when a rotational phase of the rotational core is changed, the first state being a state where the magnetic force of the permanent magnet is not applied to the movable element, the second state being a state where the magnetic force of the permanent magnet is applied to the movable element.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: March 26, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuhiro Asayama, Satoki Takagi
  • Patent number: 10180122
    Abstract: A fuel pump includes a plunger that reciprocates inside a cylinder. The fuel pump includes a first movable element connected to the plunger, a second movable element that functions as a counterweight for preventing or reducing vibrations that are created by reciprocation of the first movable element, an electromagnet provided between the first movable element and the second movable element, a magnetic member that is provided between the first movable element and the second movable element and that attracts both the first movable element and the second movable element when the electromagnet is energized, and a first spring that urges the first movable element and the second movable element so as to move away from each other.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: January 15, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kazuhiro Asayama
  • Patent number: 10087916
    Abstract: A fuel pump includes a first plunger that reciprocates in a first cylinder. The fuel pump further includes a first mover connected to the first plunger; a second mover that serves as a counterweight for suppressing vibration that occurs due to reciprocating movement of the first mover; an electromagnet and a magnetic member that are provided between the first mover and the second mover; a plate disposed between the first mover and the second mover; and a third spring and a fourth spring being a pair of springs sandwiching the plate between the third spring and the fourth spring, the third spring and the fourth spring having end portions connected to a housing.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: October 2, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Kazuhiro Asayama
  • Patent number: 10066613
    Abstract: A fuel pump includes a plunger that reciprocates in a cylinder. The fuel pump further includes a first mover connected to the plunger, a second mover serving as a counterweight for the first mover, an electromagnet provided between the first mover and the second mover, a first magnetic member provided between the first mover and the second mover, and a first spring urging the first mover and the second mover away from each other. Further, a second magnetic member is provided between both of the electromagnet and the first magnetic member and a first inclined surface of the first mover, while a third magnetic member is provided between both of the electromagnet and the first magnetic member and a second inclined surface of the second mover.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: September 4, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuhiro Asayama, Hirokazu Yokoyama, Satoki Takagi
  • Patent number: 9970421
    Abstract: A pump for use in pressurizing a cryogenic fluid. The pump may have a barrel, and a boost enclosure disposed around the barrel. The pump may also have a boost plunger disposed inside the barrel and configured to discharge fluid into the boost enclosure. The pump may further have a main plunger disposed inside the barrel and configured to receive fluid from the boost enclosure and to increase a pressure of the fluid.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: May 15, 2018
    Assignee: Caterpillar Inc.
    Inventors: Dana R. Coldren, Sana Mahmood
  • Patent number: 9956333
    Abstract: A ventricular assist device includes a pump such as an axial flow pump, an outflow cannula connected to the outlet of the pump, and an anchor element. The anchor element is physically connected to the pump, as by an elongated element. The pump is implanted within the left ventricle with the outflow cannula projecting through the aortic valve but desirably terminating short of the aortic arch. The anchor element is fixed to the wall of the heart near the apex of the heart so that the anchor element holds the pump and outflow cannula in position.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: May 1, 2018
    Assignee: HeartWare, Inc.
    Inventors: Jeffrey A. LaRose, Charles R. Shambaugh, Jr., Steve A. White, Daniel Tamez
  • Patent number: 9726170
    Abstract: This document provides mechanical seals that include one or more rolling diaphragms. In one example embodiment, this document provides double rolling diaphragm seals that are usable in conjunction with various types of equipment including, but not limited to, accelerated life testing systems. In such a context, the double rolling diaphragm seals facilitate high-speed linear modulation of a variable volume pressure vessel, while maintaining precise volumetric control. Such an arrangement can facilitate an essentially frictionless linear actuation system having a long stroke, long service life, and precise volumetric control. In addition, this document provides linear actuator systems that can be used in adverse environmental conditions.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: August 8, 2017
    Assignee: TA Instruments-Waters L.L.C.
    Inventors: Troy D. Nickel, Jason Chinavare
  • Patent number: 9146046
    Abstract: A refrigerator and a driving method thereof are disclosed. A primary compressor and a secondary compressor can form independent cycles together with corresponding evaporators so as to reduce unnecessary power consumption. Also, a backflow prevention valve is installed between the primary and secondary compressors to prevent an increase in pressure of the secondary compressor, or an auxiliary heat exchanger is installed at the outlet side of a second evaporator with high temperature to allow heat exchange of an outlet side pipe of a first evaporator with low temperature so as to shift a load of a freezing chamber into a relatively large refrigerating chamber, thereby improving efficiency of the refrigerator. In addition, an oil separator or an oil collection pipe is installed at the outlet sides of the compressors or an oil balancing pipe and an oil balancing valve are installed between the compressors, so as to uniformly maintain an oil amount between the compressors.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: September 29, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Sunam Chae, Juyeong Heo, Sung Jhee, Chanho Jeon
  • Patent number: 9004877
    Abstract: A multi-stage diaphragm suction pump, includes at least two pump chambers, each having a inlet having at least one inlet valve, and a outlet having at least one outlet valve, and a suction line, which connects the fluid inlets of the pump chambers. Successive pump chambers are connected to one another by at least one connection line such that, when a differential pressure in the suction line is reached/exceeded, the diaphragm pump changes from parallel to an operating mode that is at least also serial. At least one check valve, which opens to a downstream pump stage, is interposed in each of the inflow and outflow regions of the at least one connection line. A suction-side opening or a pressure-side opening of the connection line is arranged in a region of the pump chamber on which a diaphragm associated with the pump chamber rolls first during a pump cycle.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: April 14, 2015
    Assignee: KNF Neuberger GmbH
    Inventors: Erich Becker, Erwin Hauser
  • Publication number: 20140241910
    Abstract: A submersible pump includes a fluid-end section, a power-end section, a top connection sub and an umbilical. The fluid-end section includes a tubular fluid-end barrel, an upper piston disposed within the fluid-end barrel bore, and a traveling valve disposed at the upper piston upper end. The power-end section includes a tubular hydraulic cylinder. A lower piston disposed within the hydraulic cylinder bore is connected to the upper piston. The top connection sub connected to the fluid-end barrel upper end has a discharge port and a standing valve disposed below the discharge port. The umbilical includes first and second tubing strings providing fluid communications between a prime mover and the hydraulic cylinder bore below and above the lower piston face, respectively. A third tubing string provides fluid communications between a wellhead and the top connection sub discharge port.
    Type: Application
    Filed: February 27, 2014
    Publication date: August 28, 2014
    Applicant: GOLDEN CROSS FOUNDATION LIMITED
    Inventor: Lindsay K. Campbell
  • Patent number: 8721299
    Abstract: A piston member that includes a piston rod provided with a piston serves for reciprocating inside a cylinder barrel, the piston dividing the cylinder barrel chamber into a proximal cylinder barrel chamber having a proximal capped end opposite the piston and a distal cylinder barrel chamber having a distal cylinder barrel end opposite the piston. The piston member has at least one sealing ring or seat arranged inside the distal cylinder barrel chamber at the distal cylinder barrel end. Preferably three consecutive piston members are arranged to operate in a series in an apparatus for transporting coal powder to a gasifier. The movement of the pistons inside the cylinder barrels is controlled in relation to each other to transport apportioned batches of coal powder to a high pressure reactor.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: May 13, 2014
    Assignee: Thermochem Recovery International, Inc.
    Inventors: Thomas Koch, Peter Friehling
  • Patent number: 8657588
    Abstract: A compression apparatus for compressing a fluid, the apparatus having a frame and a motor mounted to the frame, the improvement comprising a drive mechanism installed on the frame so as to be driven by the motor and at least one piston-cylinder unit operably connected to the drive mechanism, the piston-cylinder unit having a cylinder, a piston slidably installed within the cylinder, and a piston rod interconnecting the piston and the drive mechanism so as to shift the piston up and down within the cylinder.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: February 25, 2014
    Assignee: US Airflow
    Inventor: Morten A. Lund
  • Patent number: 8454331
    Abstract: A plate pump assembly for pumping various fluids including heavy crude. The plate pump assembly includes first and second chambers each having lower and upper valves. Primary upper and lower eccentric cams within the plate pump assembly are connected to an upper plate and a lower plate. A secondary eccentric cam is connected to a piston that separates the first and second chambers. A drive shaft of the assembly rotates the primary upper and lower eccentric cams to actuate the upper and lower plates alternately concealing and revealing the lower and upper valves for the first and second chambers. The drive shaft further rotates the secondary eccentric cam to actuate the piston alternately decreasing and increasing an area of the first and second chambers to receive fluids through the lower valves and compress the area within the first and second chambers to push the fluids through the upper valves.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: June 4, 2013
    Inventor: Michael Brent Ford
  • Publication number: 20120282118
    Abstract: A reciprocation pump has a supply liquid-side sub-pumping chamber and a waste liquid side sub-pumping chamber for containing and sending out liquid adapted to communicate with the supply liquid-side pumping chamber and with the waste liquid-side pumping chamber, respectively. The supply liquid-side sub-pumping chamber and the waste liquid-side sub-pumping chamber are interlocked with a reciprocation mechanism to vary their volume reversely to that of the volume variation of the supply liquid-side pumping chamber and the waste liquid-side pumping chamber, respectively. The reciprocating motion of the reciprocation mechanism enables the liquid to be supplied to the objective apparatus through the supply liquid-side pumping chamber and the supply liquid-side sub-pumping chamber. Also, it enables the waste liquid from the objective apparatus to be discharged to the outside through the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber.
    Type: Application
    Filed: May 24, 2012
    Publication date: November 8, 2012
    Applicant: Nikkiso Company Limited
    Inventor: Hiroaki Suzuki
  • Patent number: 8287251
    Abstract: A hand operated hydraulic pump has a cam that is pivoted by a compensation cylinder that rotates the cam so as to move the pivot of an operating handle closer to the pump plunger as the output pressure of the pump increases.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: October 16, 2012
    Assignee: Actuant Corporation
    Inventor: Fredericus Johannes Weber
  • Patent number: 8231357
    Abstract: A high-pressure compressor (1) for compressing gases, which has at least two working spaces (3, 3?) and is optionally adjustable between a single-stage operating position, in which the gas to be compressed is compressed in one single stage, and a multi-stage operating position, in which at least one working space (3?) is connected in series with at least one further working space (3), wherein at least three working spaces (3, 3?) are provided which all have the same working volume.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: July 31, 2012
    Assignee: Leobersdorfer Maschinenfabrik AG
    Inventors: Ernst Huttar, Günther Ognar
  • Patent number: 8215922
    Abstract: An invention is claimed that enables the pumping of compressible fluids at high pressures when an accurate flow is desired. Two pressure sources, for example pumps plumbed in series, separate thermodynamic work, such as pressurization, at the first pressure source from a volumetric or matter metering function in the second pressure source. One example is a flowstream delivery for a chemical instrumentation system that is manufactured from relatively unsophisticated pumps yet delivers precise flows with low pulsation (<1%) over pressures greater than 100 bar. An advantage of one embodiment allows the economical conversion of typical HPLC systems to state of-the-art supercritical fluid chromatography (SFC) systems with minimal modification to system components.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: July 10, 2012
    Assignee: Aurora SFC Systems, Inc.
    Inventors: Terry A. Berger, Kimber D. Fogelman, Edwin E. Wikfors, L. Thomson Staats, III, Samuel O. Colgate, Michael A. Casale
  • Publication number: 20120152248
    Abstract: Methods and apparatus for storing high-pressure, high-purity oxygen in a pressure vessel for use in the home health care or related fields as for ambulatory patients, persons confined to wheelchairs, and those who are bedridden. The Oxygen may be produced from air an oxygen-enriched gas and stored in a concentrator product tank. After reaching a predetermined pressure, the gas is fed to a compressor where it is compressed to a high pressure and stored in a mobile or portable high-pressure container. A patient can thus have increased mobility through use of the portable, one or more high-pressure oxygen containers.
    Type: Application
    Filed: February 24, 2012
    Publication date: June 21, 2012
    Applicant: INVACARE CORPORATION
    Inventors: Joseph B. RICHEY, II, Gerold G. GOERTZEN
  • Patent number: 8186972
    Abstract: A multi-stage expansible chamber pump system includes a HP pump unit, and first and second LP pump units. The LP units each include a LP air chamber and a pumped fluid chamber, separated by a piston. The HP unit includes left and right HP air chambers separated by a piston. Pistons are coaxial on a common piston rod for reciprocating movement in unison. A direction control DC valve includes a valve spool movable between first and second positions. The DC valve receives high pressure shop air as Control air and Process air. Control air moves the DC valve spool alternately to first and second positions. The DC valve, as determined by the position of the spool, directs Process air alternately to one side, then the other, of the HP unit, whereby the pistons reciprocate in unison to pump fluid through the fluid chambers.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: May 29, 2012
    Assignee: Wilden Pump and Engineering LLC
    Inventor: Carl J. Glauber
  • Patent number: 8123497
    Abstract: A multiple-stage gas compressor is disclosed by this application. The compressor has a plurality of pistons, including at least one wobble piston assembly and at least one cylinder piston assembly for compressing pressurized gas from the at least one wobble piston. The wobble piston assembly includes a wobble piston head fixed to a wobble piston connecting rod. The cylinder piston assembly includes a cylindrical piston head pivotally connected to a cylindrical piston connecting rod.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: February 28, 2012
    Assignee: Invacare Corporation
    Inventors: Joseph B. Richey, II, Gerold G. Goertzen
  • Patent number: 8123496
    Abstract: A pump device which accurately detects a flow rate of a pump, performs real-time control of the flow rate, and thus can suppress a flow rate error caused by occurrence of pulsation. Control of a pump rotation speed by a pressure sensor has low responsiveness in a low pressure region, and a correlation between a pressure and a flow rate is incomplete in a high flow rate region. With this taken into consideration, a flow rate sensor is disposed at an outlet port of a second pump. A position detection sensor detects a point where a first pump is shifted from a suction mode to a discharge mode. Moreover, the flow rate sensor detects that there is no discharge from the pump, and that there is discharge from the pump alone. Accordingly, a controller sets a rotation speed of a motor to a speed double the previous speed (double the normal rotation speed).
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: February 28, 2012
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Kimihiko Ishii, Kiyotoshi Mori, Masahito Ito, Hironori Kaji, Takefumi Yokokura
  • Patent number: 8123495
    Abstract: A positive-displacement reciprocating compressor comprising a “non-conventional” crank mechanism which eliminates the amount of frictional force between the wall of the piston and the wall of the cylinder, whose characteristic feature is to have a planet (20) made of sintered material, with self-lubrication properties, allowing to eliminate bushings or similar additional elements. An economical and structurally simple lubrication system, which preferably comprises a classical link rod/crank mechanism, utilizes the mechanical energy provided by the drive shaft of the compressor and sends the lubricant (oil) in a precise manner to the surfaces that need to be lubricated. This oil is easily retained by the very small grains of the sintered material. Moreover, a valve system based on a single plate simplifies the structure of the cylinder unit (30).
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: February 28, 2012
    Assignee: LA.ME. s.r.l
    Inventors: Andrea Di Foggia, Mariano Migliaccio, Ottavio Pennacchia
  • Patent number: 8087902
    Abstract: The invention relates to a hydraulic device with a supply line for pressurized hydraulic fluid and with a lubricating pump that is connected to the supply line in a fluidic fashion. The lubricating pump comprises a hydraulic inlet, a pump element for conveying a lubricant from a reservoir to at least one lubricating point of the hydraulic device, and mechanism for producing a pump stroke of the pump element. The mechanism for producing a pump stroke comprises a base body, a piston unit movable in the base body, and a reversing mechanism for reversing the direction of movement of at least one element of the piston unit.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: January 3, 2012
    Assignee: Lincoln GmbH
    Inventors: Zdravko Paluncic, Markus Mandera, Ayzik Grach
  • Publication number: 20110274563
    Abstract: A dosing pump comprises an inlet for a solvent, an injection device for an additive, a reciprocating main piston for mixing the solvent with the additive during a suction stroke and for discharging the mixture from an outlet in an evacuation stroke. A divider substantially perpendicular to a rod connected to the main piston separates a main piston housing from a switching device for controlling a main piston stroke direction. The switching device comprises two inlet rotary valve assemblies that are disposed externally to a corresponding inlet aperture bored in the divider when in an opened state and are rotatable about an axis substantially perpendicular to the axis of the main piston. Each of the valve assemblies alternately opens and occludes a corresponding inlet aperture so that solvent flowing through a first inlet aperture performs a suction stroke and solvent flowing through a second inlet aperture performs an evacuation stroke.
    Type: Application
    Filed: January 14, 2010
    Publication date: November 10, 2011
    Applicant: Tefen Manufacture & Marketing Plastic Products 1990 Ltd.
    Inventors: Lior Man, Anton Babushkin
  • Patent number: 8025487
    Abstract: An improved baffle for a pony rod arm of a two cycle reciprocating pump having a gear end containing gear oil and a fluid end channeling oilfield fluids, provides a spiral cut expanded baffle which may be expanded to be installed on a pony rod arm of the pump without requiring the disassembly of the pump to install the baffle on the rod arm, the expanded baffle compressed and attached together subsequent to installation on the rod arm, the baffle slidably engaging the rod arm to strip the rod arm of liquid residue to prevent contamination of the gear end and the gear oil by the oilfield fluids.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: September 27, 2011
    Inventor: William Paul, III
  • Patent number: 8011906
    Abstract: A piston pump includes a pump mechanism for changing a volume of a pump chamber to move a piston in a housing, and a feed mechanism that has a feed ring attached to a circular groove portion of the piston to be slaved with a movement of the piston. The feed mechanism is located in a suction passage from a suction port to a pump chamber, and the piston has a flange portion protruding radially outwardly. An inner peripheral surface of the feed ring has an inner-diameter enlarged portion extending radially outwardly to have an enlarged passage portion between the inner peripheral surface of the feed ring and the outer peripheral surface of the piston, and a valve portion for opening and closing a suction passage is constructed of an end portion of the inner diameter enlarged portion of the feed ring and the flange portion.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: September 6, 2011
    Assignee: Advics Co., Ltd.
    Inventor: Tomoo Harada
  • Publication number: 20110171044
    Abstract: A multi-stage reciprocating compressor includes a cylinder block and a cylinder head. The cylinder block defines a low stage cylinder and a high stage cylinder. The cylinder head is secured to the cylinder block overlying the low and high stage cylinders. The cylinder head defines a mid-stage plenum which is in fluid communication with the low stage cylinder and the high stage cylinder for communicating a working fluid discharged from the low stage cylinder to the high stage cylinder.
    Type: Application
    Filed: September 16, 2009
    Publication date: July 14, 2011
    Applicant: CARRIER CORPORATION
    Inventor: Paul J. Flanigan
  • Publication number: 20110085922
    Abstract: The invention relates to a converter for converting mechanical energy into hydraulic energy and to a robot implementing said converter. The invention can particularly be used in the production of humanoid robots in which autonomy is to be improved. The converter includes a shaft rotated by mechanical energy about a first axis relative to a casing, a hub comprising a bore formed about a second axis, the shaft rotating in the bore, the two axes being parallel and a distance between the axes forming an excentricity, at least two pistons capable of movement in a radial housing of the shaft, the piston bearing against the bore.
    Type: Application
    Filed: March 25, 2009
    Publication date: April 14, 2011
    Applicant: BIA
    Inventors: Samer Alfayad, Fathi Ben Ouezdou, Fayçal Namoun
  • Patent number: 7901192
    Abstract: A two stage reciprocating compressor includes a casing. A first compressing unit is disposed in the casing and includes a first piston and a first cylinder, the first compressing unit being driven by a reciprocating motor to linearly reciprocate the first piston in the first cylinder to suck in and compress gas. A second compressing unit is disposed in the casing and includes a second piston and a second cylinder, the second compressing unit being driven by vibration of the first compressing unit to linearly reciprocate the second piston in the second cylinder to suck in and compress gas. A vibration transfer member transfers the vibration from the first compressing unit to the second compressing unit. The first and second compressing units extend in parallel and face toward each other.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: March 8, 2011
    Assignee: LG Electronics Inc.
    Inventors: Sung-Man Cho, Jeong-Woo Kim, Eon-Pyo Hong, Jung-Sik Park
  • Publication number: 20100303645
    Abstract: This invention provides a swing-type reciprocative compressor capable of maintaining long durability and preventing propagation of heat to the large end portion of a piston, even under high-compression. In the reciprocative compressor having a swing-type piston mechanism, a piston ring is attached to a piston ring groove to seal between a piston and a cylinder. A ring groove is provided separately from the piston ring groove on the outer circumferential side of the piston and on the crankshaft side of the piston ring groove. A guide ring restricted from moving in a radial direction and shaped like a skirt opening toward the crankshaft side is provided in the ring groove.
    Type: Application
    Filed: January 6, 2010
    Publication date: December 2, 2010
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Akito OHATA, Hisatoshi Kobayashi
  • Patent number: 7819639
    Abstract: The invention relates to a cooling device for a compressor 100 which is provided with an intermediate heat exchanger 112 and an output heat exchanger 102 for cooling of compressed gas. The cooling device is enclosed by a jacket 200. The jacket has an air intake opening 202, connected to a radial fan 105 which provides an overpressure inside the jacket 200. The heat exchangers 102, 112 are mounted in air outlet openings 204, 206 in the jacket, with the result that the overpressure in the jacket 200 leads to cooling of the heat exchangers 102, 112. The jacket further comprises an additional outlet opening 208 for discharge of air used for cooling other elements of the compressor, such as cylinder walls, covers/tops and crankcases. The relationship between the different cooling processes can be influenced by the design of the openings 204, 206, 208 in the jacket 200.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: October 26, 2010
    Assignee: Sperre Mek. Verksted AS
    Inventor: Mareno Kennet Nakken
  • Patent number: 7794660
    Abstract: A fluid content monitor including a cuvette, a calorimeter adapted to generate a signal indicative of contents of a fluid sample contained in the cuvette, a container for holding a reagent, and a pump assembly for delivering reagent from the container to the cuvette. The pump assembly includes a tube extending from the container to the cuvette, check valves preventing reverse flow in the tube, and a hammer driven by a solenoid for repetitively compressing the tube to pump reagent to the cuvette. The cuvette can be removed for cleaning and replacement.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: September 14, 2010
    Assignee: HF Scientific, Inc.
    Inventors: Rowan Connelly, Joel Leal
  • Patent number: 7775775
    Abstract: A two stage reciprocating compressor includes a casing. A first compressing unit is disposed in the casing and includes a first piston and a first cylinder, the first compressing unit being driven by a reciprocating motor to linearly reciprocate the first piston in the first cylinder to suck in and compress gas. A second compressing unit is disposed in the casing and includes a second piston and a second cylinder, the second compressing unit being driven by vibration of the first compressing unit to linearly reciprocate the second piston in the second cylinder to suck in and compress gas. A vibration transfer member transfers the vibration from the first compressing unit to the second compressing unit. The first and second compressing units extend in parallel and face in the same direction, the second compressing unit being located adjacent to a suction passage of the first compressing unit.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: August 17, 2010
    Assignee: LG Electronics Inc.
    Inventors: Sung-Man Cho, Jeong-Woo Kim, Eon-Pyo Hong, Jung-Sik Park
  • Publication number: 20100166573
    Abstract: The high-pressure generation device (110) comprises three pressure chambers which pressurize liquid drawn from the outside through the pumping operation of a plurality of pistons (1) having different outer diameters, pressurizes the liquid drawn from the outside, and discharges the liquid pressurized to a constant pressure to the outside in each reciprocating operation of the plurality of pistons (1). The three pressure chambers comprising a first pressure chamber (31) which draws liquid from the outside, a second pressure chamber (32) of which the pressurizing area for pressurizing the liquid is smaller than that of the first pressure chamber (31), and a third pressure chamber (33) of which the pressurizing area is smaller than that of the second pressure chamber (32) and which discharges liquid to the outside.
    Type: Application
    Filed: March 11, 2008
    Publication date: July 1, 2010
    Inventors: Mituharu Magami, Naoyuki Magami, Takuya Magami
  • Publication number: 20100154442
    Abstract: A refrigerant recovery machine having two opposed and off-set pistons and its use are provided. The pistons are received in cylinders that are able to move depending on the alignment of the pistons. The two pistons in the compressor allow more volume of refrigerant than a single piston and because they are opposed and off-set allows for more even load on the motor.
    Type: Application
    Filed: December 22, 2008
    Publication date: June 24, 2010
    Inventors: Michael Steven Schoenoff, Mark McMasters
  • Publication number: 20100147758
    Abstract: A pumping apparatus (200) for delivering liquid at a high pressure (Psys) at which compressibility of the liquid becomes noticeable, comprises a piston (20) adapted for reciprocation in opposing directions in a pump working chamber (30), and a drive (40) coupled to the piston (20) to apply a tension force onto the piston (20) in order to move the piston (20) into a drive direction (50).
    Type: Application
    Filed: November 15, 2006
    Publication date: June 17, 2010
    Applicant: AGILENT TECHNOLOGIES, INC.
    Inventor: Haertl Hans-Georg
  • Publication number: 20100150746
    Abstract: The invention relates to a compressor (1) for gaseous and/or cryogenically liquefied media comprising a first compressor piston (6) and a second compressor piston (7), which are operatively connected to an eccentric shaft (2), wherein the second compressor piston (7) is arranged substantially opposite to the first compressor piston (6) relative to the eccentric shaft (2). To solve the object of providing such a compressor with a small space requirement and low construction costs, it is proposed according to the invention for the compressor (1) to be embodied as an oscillating piston-type compressor, wherein the first compressor piston (6) is arranged on an eccentric ring (4), which is effectively connected to the eccentric shaft (2) and wherein the second compressor piston (7) is fastened to a pivot lug (8), which is effectively connected to the eccentric ring (4).
    Type: Application
    Filed: August 2, 2007
    Publication date: June 17, 2010
    Inventors: Robert Adler, Georg Siebert, Martin Stehrlein
  • Publication number: 20100135827
    Abstract: In a tandem piston pump (1) from which pump discharge pressure from four systems is extracted, a tilt axis direction of a front swash plate (14) and a tilt axis direction of a rear swash plate (54) are different to each other, respective discharge ports (23, 24) of a rear pump (50) are opened at a phase difference relative to respective discharge ports (21, 22) of a front pump (10), and respective pump ports (41, 42) of the front pump (10) and respective pump ports (43, 44) of the rear pump (50) are opened in different side faces (71, 72) of a port block (70).
    Type: Application
    Filed: July 31, 2007
    Publication date: June 3, 2010
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Kazumi Ito, Atsushi Aoyama
  • Publication number: 20100095690
    Abstract: A compressor has a housing. A crank is carried by the housing for rotation about a crank axis. A cylinder is defined within the housing and has a proximal portion and a distal portion. The distal portion is smaller in transverse cross-sectional area than is the proximal portion. A piston is held within the housing for reciprocal movement at least partially within the cylinder. The piston also has a distal portion smaller in transverse cross-sectional area than a proximal portion. A connecting rod is pivotally coupled to the crank for relative rotation about a proximal axis and to the piston for relative rotation about a distal axis. A first compression chamber exists in the cylinder distal portion beyond the end of the piston. A second compression chamber exists in the cylinder proximal portion beyond a piston shoulder. The first and second compression chambers are non-series and non-parallel.
    Type: Application
    Filed: December 31, 2006
    Publication date: April 22, 2010
    Applicant: CARRIER CORPORATION
    Inventors: James W. Bush, Wayne P. Beagle
  • Patent number: 7690899
    Abstract: A piston pump includes a first piston pump including a first piston and a first pump chamber, a second piston pump including a second piston and a second pump chamber, the second piston operating to follow the first piston, a pressure release passage formed in communication with the second pump chamber, and a relief valve provided at the pressure release passage and defining an upper limit discharge pressure of the second piston pump. When a discharge pressure of the second piston pump is equal to or smaller than the upper limit, a discharge fluid of the second piston pump is added to that of the first piston pump so as to flow into an outlet port. When the discharge pressure exceeds the upper limit, the discharge fluid is released to the pressure release passage and the discharge fluid of the first piston pump only flows to the outlet port.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: April 6, 2010
    Assignee: Advics Co., Ltd.
    Inventor: Tomoo Harada
  • Publication number: 20100040485
    Abstract: A high pressure pump includes a pump housing. A piston rod located within the pump housing defines a plurality of pump cavities and a plurality of piston cavities. Movement of the piston within the piston cylinder pumps the fluid from the piston cavities out of the high pressure pump. The continuous pumping of HWBF from the pump housing provides fluid at a relatively constant flow and pressure. The HWBF pressure is also at a higher pressure than traditional single stage high pressure pumps can provide.
    Type: Application
    Filed: August 12, 2008
    Publication date: February 18, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: David R. Jensen, Mike M. Ghiran, Ranny Joe Nunley, David R. Friddell, William M. Crantas, Kevin R. Marks, Paul D. Larsen
  • Publication number: 20100040483
    Abstract: An invention is claimed that enables the pumping of compressible fluids at high pressures when an accurate flow is desired. Two pressure sources, for example pumps plumbed in series, separate thermodynamic work, such as pressurization, at the first pressure source from a volumetric or matter metering function in the second pressure source. One example is a flowstream delivery for a chemical instrumentation system that is manufactured from relatively unsophisticated pumps yet delivers precise flows with low pulsation (<1 %) over pressures greater than 100 bar. An advantage of one embodiment allows the economical conversion of typical HPLC systems to state of-the-art supercritical fluid chromatography (SFC) systems with minimal modification to system components.
    Type: Application
    Filed: September 5, 2008
    Publication date: February 18, 2010
    Inventors: Terry A. Berger, Kimber D. Fogelman, Edwin E. Wikfors, L. Thomson Staats, III, Samuel O. Colgate, Michael A. Casale
  • Publication number: 20100014992
    Abstract: A positive-displacement reciprocating compressor comprising a “non-conventional” crank mechanism which eliminates the amount of frictional force between the wall of the piston and the wall of the cylinder, whose characteristic feature is to have a planet (20) made of sintered material, with self-lubrication properties, allowing to eliminate bushings or similar additional elements. An economical and structurally simple lubrication system, which preferably comprises a classical link rod/crank mechanism, utilizes the mechanical energy provided by the drive shaft of the compressor and sends the lubricant (oil) in a precise manner to the surfaces that need to be lubricated. This oil is easily retained by the very small grains of the sintered material. Moreover, a valve system based on a single plate simplifies the structure of the cylinder unit (30).
    Type: Application
    Filed: August 6, 2007
    Publication date: January 21, 2010
    Applicant: LA.ME S.R.L.
    Inventors: Andrea Di Foggia, Mariano Migliaccio, Ottavio Pennacchia
  • Publication number: 20090311114
    Abstract: A multi-stage piston compressor is provided with at least two piston-cylinder units, which respectively comprise a separate linear drive for moving the piston. A control device is also provided, which is designed in a manner such that the linear drives may be controlled individually with regard to speed and stroke.
    Type: Application
    Filed: June 3, 2009
    Publication date: December 17, 2009
    Applicant: J.P. SAUER & SOHN MASCHINENBAU GMBH
    Inventors: Harald Schulz, Roland Tittel