Intensifier Patents (Class 417/225)
  • Patent number: 11015622
    Abstract: A hydraulic intensifier and/or booster (HIB) for transforming an incoming hydraulic pressure at a relative low-pressure to an amplified outgoing hydraulic pressure at a relative high-pressure. The HIB comprising a hydraulic motor and an intensifying mechanism, possibly a hydraulic screw pump mechanism, wherein the hydraulic motor being arranged from the incoming hydraulic pressure to output power. The intensifying mechanism being arranged to receive the outputted power from the hydraulic motor and transform it to linear power of a piston and via the piston being arranged to build the amplified outgoing hydraulic pressure.
    Type: Grant
    Filed: October 11, 2020
    Date of Patent: May 25, 2021
    Inventor: Eviatar Socolovsky
  • Patent number: 10895269
    Abstract: A double acting hydraulic pressure intensifier (1) is described comprising a housing (2), a first piston arrangement (7) having a first high pressure piston (8) in a first high pressure chamber (3) in the housing (2) and a first low pressure piston (9) in a first low pressure chamber (5) of the housing (2), a second piston arrangement (10), having a second high pressure piston (11) in a second high pressure chamber (4) in the housing (2) and a second low pressure piston (12) in a second low pressure chamber (6) in the housing (2), and a switching valve (14) having a valve element (15). Such a pressure intensifier should be made compact. To this end the switching valve (14) is located between the first piston arrangement (7) and the second piston arrangement (10).
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: January 19, 2021
    Assignee: PISTONPOWER APS
    Inventors: Juraj Hanusovsky, Jorgen Mads Clausen, Tom Tychsen
  • Patent number: 10806102
    Abstract: A hydraulic drive for feed rollers of a head of a complete timber harvester includes two radial piston motors coupled for conjoint rotation to the feed rollers. One radial piston motor has only one displacement volume and the other radial piston motor has two displacement volumes, between which it is possible to switch. A tree trunk clamped between the feed rollers can thus be moved at two speeds. At the higher speed, pressure medium circulates under a control pressure in the second displacement volume of the switchable radial piston motor.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: October 20, 2020
    Assignee: Robert Bosch GmbH
    Inventor: Iain Edward
  • Patent number: 10781833
    Abstract: A hydraulic hybrid system for rotatory applications has an actuator (49, 91) in the form of a motor pump unit (91). The motor pump unit is coupled to a rotatory-operating device (94) and works as a consumer of hydraulic energy in one operating state of the device (94) and works as a producer of hydraulic energy in another operating state of the device (94). A hydraulic accumulator (1) can be charged by the motor pump unit (91) for energy storage in the one operating state and can be discharged for energy release to the motor pump unit (91) in the other operating state. The hydraulic accumulator is an adjustable hydropneumatic piston accumulator (1) in which a plurality of pressure chambers (19, 21, 23, 25) are delimited by active surfaces (11, 13, 15, 17) of different sizes on the fluid side of the accumulator piston (5).
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: September 22, 2020
    Assignee: HYDAC FLUIDTECHNIK GMBH
    Inventors: Frank Schulz, Peter Bruck
  • Patent number: 10703651
    Abstract: A reverse osmosis system and method includes a pump pressurizing a feed stream, a first and second membrane array that generates permeate and brine streams. A first energy recovery device uses first energy from the second brine stream to pressurize the first brine stream. A first and second auxiliary and bypass valves are associated with the first and second energy recovery device. A second energy recovery device uses second energy from the second brine stream to increase a second pressure of the feed stream. A first flowmeter generates a first flow signal for the first permeate stream. A second flowmeter generates a second flow signal for of the second permeate stream. A third flowmeter generates a third flow signal for the second brine stream. A motor drives the first energy recovery device. A controller controls the in response to the flow signals.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: July 7, 2020
    Assignee: FLUID EQUIPMENT DEVELOPMENT COMPANY, LLC
    Inventor: Eli Oklejas, Jr.
  • Patent number: 10519990
    Abstract: The hydraulic apparatus is set so that the ratio of the pressure-receiving area of the respective bottom oil chambers of the boom cylinder, the arm cylinder and the bucket cylinder to the pressure-receiving area of the respective rod oil chambers matches the ratio of the extruded volume drawn into or discharged from the bottom oil chambers per single rotation by the respective extrusion members of the first hydraulic pump motor, the second hydraulic pump motor and the third hydraulic pump motor to the volume discharged from or drawn into the rod oil chambers.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 31, 2019
    Assignee: YANMAR CO., LTD.
    Inventors: Kazuhiro Owada, Keishi Yamanaka, Kensuke Kaneda, Hidekazu Niu
  • Patent number: 10323657
    Abstract: A system for hydraulic systems includes a working cylinder (58) which operates as a consumer of hydraulic energy or as a generator of hydraulic energy. A hydraulic accumulator (1) can be charged by the working cylinder for storing energy and can be discharged for delivering energy to the working cylinder (58). One hydraulic accumulator is provided in the form of an adjustable hydropneumatic piston accumulator (1), in which with a plurality of pressure chambers (19, 21, 23, 25) adjoining effective surfaces (11, 13, 15, 17) of different sizes are on the fluid side of the accumulator piston (5). An adjusting arrangement (51) connects a selected pressure chamber (19, 21, 23, 25) or a plurality of selected pressure chambers (19, 21, 23, 25) of the piston accumulator (1) to the working cylinder (58) as a function of the pressure level that prevails respectively on the gas side of the piston accumulator (1) and on the working cylinder (58).
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: June 18, 2019
    Assignee: HYDAC FLUIDTECHNIK GMBH
    Inventors: Frank Schulz, Peter Bruck
  • Patent number: 10197076
    Abstract: A pneumatic volume booster to amplify a control pressure output signal can include a pneumatic control outlet for attachment to a pneumatic working chamber of the pneumatic actuator; a pneumatic aeration inlet configured to receive the pneumatic control pressure signal from the position controller, a pneumatic amplification inlet configured to receive a constant pneumatic air amplification signal, a pneumatic de-aeration connection from the control outlet to a pressure sink configured to aerate the control actuator, a deaerator seat-valve separating and/or opening the pneumatic de-aeration connection, a pneumatic aeration connection between the first aeration inlet and the control outlet; an aerator seat-valve separating and/or opening the pneumatic aeration connection, a pneumatic amplification connection between the amplification inlet and the control outlet; an amplification seat-valve separating and/or opening the pneumatic amplification connection; and a mechanical seat-valve-operator for commonly operat
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: February 5, 2019
    Assignee: SAMSON AKTIENGESELLSCHAFT
    Inventor: Frank Valentin-Rumpel
  • Patent number: 10030639
    Abstract: The presently-disclosed subject matter includes a pressure intensification device that increases the pressure of a fluid at a first pressure to a second higher pressure. In some embodiments the devices comprises an outer shell, and outer element housed within the outer shell, and an inner element housed within the outer element, the inner and outer elements being configured to slide in a reciprocating manner within the outer shell to increase the pressure of a fluid. In some embodiments the device does not comprise an additional power source or motor to increase the pressure of the fluid to a second pressure.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: July 24, 2018
    Inventor: Junius Hunter
  • Patent number: 9938993
    Abstract: A hydraulic intensifier comprising a reciprocating differential piston arrangement and a controller configured to control the supply of low pressure hydraulic fluid to the intensifier is provided. The controller comprises at least one solenoid operated pilot valve and electronic operator configured to operate the pilot valve.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: April 10, 2018
    Assignee: GE Oil & Gas UK Limited
    Inventor: Timothy James Roberts
  • Patent number: 9816534
    Abstract: A hydrostatic drive system (1) has a hydrostatic pump (3) driven by a drive motor (2) and connected in a closed circuit with a hydrostatic motor (4). The hydrostatic motor (4) drives a consumer (5) and the closed circuit is formed by a first hydraulic connection (6a) and a second hydraulic connection (6b). A hydrostatic accumulator (30) can be connected with at least one of the two hydraulic connections (6a, 6b). A hydrostatic drive unit is located in an accumulator flow path (21) between one of the two hydraulic connections (6a, 6b) and the hydrostatic accumulator (30) and an additional hydrostatic drive unit is located in a tank flow path (22) between the other of the two hydraulic connections (6a, 6b) and a tank (17). The hydrostatic drive unit and the additional hydrostatic drive unit are a hydrostatic dual-flow double drive unit (20) provided in the accumulator flow path (21) and in the tank flow path (22).
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: November 14, 2017
    Assignee: Linde Hydraulics GmbH & Co. KG
    Inventor: Lukas Krittian
  • Patent number: 9695840
    Abstract: The reversible hydraulic pressure converter (1) employing tubular valves includes a medium-pressure stage (44) consisting of a medium-pressure cylinder (2) and a double-acting medium-pressure piston (3) the position of which is sent to a control computer of the converter (19) by a piston position sensor (14), the cylinder (2) and the piston (3) forming two medium-pressure chambers (5) that can be placed in communication with a medium-pressure inlet-outlet circuit (15) by at least one tubular valve (12), the converter (1) also including two high-pressure cylinders (9) each cooperating with a high-pressure piston (8) of smaller diameter and defining two high-pressure chambers (11) that can be placed in communication with a high-pressure inlet-outlet circuit (16) by at least one tubular valve (12), each of the various tubular valves (12) cooperating with an independent valve actuator (13).
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: July 4, 2017
    Inventor: Vianney Rabhi
  • Patent number: 9556736
    Abstract: A hydraulic pressure exchanger comprising a drum rotatable about an axis, a front plate arrangement having a front plate and a pressure shoe, said drum including a plurality of working cylinders, each working cylinder having a front opening and, during rotation of this drum, said front opening sliding over said pressure shoe along a path, said pressure shoe having at least two kidney-shaped openings, said kidney-shaped openings being arranged in said path. The hydraulic pressure exchanger should be operated with low noise. To this end said pressure shoe is arranged between said drum and said front plate and comprises at least one pressure cylinder arranged between two neighboring kidney-shaped openings, a piston being arranged in said pressure cylinder and resting against said front plate, said pressure cylinder being connected with a supply opening in a side of the pressure shoe opposite said front plate, said opening at least partly overlapping said path.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: January 31, 2017
    Assignee: Danfoss A/S
    Inventor: Haraldur Sigurdsson
  • Patent number: 9022750
    Abstract: A multichamber pressure-increasing device is comprised of a plurality of chambers disposed in series one inside the other, wherein the innermost chamber is configured so as to place objects or samples therein to subject them to ultra-high pressures. An external hydraulic pump pumps fluid into the outermost chamber while a plurality of elemental hydraulic motor pump systems (EHMPS) are mounted in each chamber for increasing the pressure from one chamber to the next one disposed more to the interior of the device through an iterative process, each EHMPS consisting of two cylinder-piston assemblies operatively joined together in such a way that both pistons extend or retract simultaneously within their respective cylinders, the motor part driving the pump part as pressurized fluid admitted into the motor cylinder is subsequently discharged so fluid admitted into the pumping part cylinder is compressed therein and impelled at a higher pressure into the succeeding chamber.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: May 5, 2015
    Inventor: Mauricio Eduardo Mulet Martinez
  • Patent number: 8973608
    Abstract: The amplifier includes a housing containing a chamber with a delivery outlet containing a non-return delivery valve. An inlet pipe projects into the chamber and a resilient obturator ring is engaged with and located about the pipe to be resiliently-movable in the chamber. An annular exhaust aperture surrounding the pipe can be sealed by the obturator ring, the obturator ring being responsive to fluid flow in the inlet pipe such that fluid flow causes the obturator ring to oscillate between conditions which alternately permit and prevent fluid from leaving the chamber through the exhaust aperture thereby causing a pulsed pressure increase in the fluid flowing through the delivery outlet. An adjuster is provided for adjusting the distance by which the fluid inlet pipe projects into the chamber and moves the pipe using co-operably inclined faces. The obturator ring and the delivery valve are shaped to create a venturi effect.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: March 10, 2015
    Inventor: Frederick Philip Selwyn
  • Publication number: 20140255214
    Abstract: A fracturing pump assembly includes an intensifier including a hydraulic cylinder, a compression member arranged within the hydraulic cylinder and a rotatable member, wherein the compression member is linearly actuated within the hydraulic cylinder by rotation of the rotatable member.
    Type: Application
    Filed: March 6, 2013
    Publication date: September 11, 2014
    Applicant: Baker Hughes Incorporated
    Inventor: Blake Burnette
  • Patent number: 8727740
    Abstract: An assembly in accordance with an embodiment of the present invention for providing a substantially uniform output flow from at least one piston of a pump powered by a prime mover includes at least a first power piston disposed in a cylinder and reciprocatingly movable within the cylinder between an extension direction when supplied with power from the prime mover and an opposite retraction direction, and a synchronization element attached to the power piston to control the speed of the power piston in the retraction direction.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: May 20, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Fangfang Jiang, Philippe Gambier, Rod Shampine
  • Patent number: 8613602
    Abstract: The invention relates to a pressure boost for fluids, in particular hydraulic fluids, having a booster piston and a control piston unit, wherein a low-pressure side of the booster piston can be alternately connected by the control piston unit via a cylinder line to a low-pressure feed line and a discharge line, and a high-pressure side of the booster piston can be alternately connected to a high-pressure load line and a low-pressure feed line, wherein the control piston unit has two elements which are embodied as seat valves and which each interact with one valve seat and which are designed such that one of the elements intermittently seals off the low-pressure feed line, which can be connected to the low-pressure side of the booster piston, and the other element intermittently seals off the discharge line, which can be connected to the low-pressure side of the booster piston.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: December 24, 2013
    Assignee: Scanwill Fluidpower APS
    Inventor: Jesper Will Iversen
  • Publication number: 20120009072
    Abstract: A high pressure intensifier system comprises a high pressure intensifier configured to receive hydraulic fluid from an input and provide the fluid to an output at a higher pressure than at the input; a monitor configured to monitor the pressure of hydraulic fluid provided at the output; and a control configured to control the supply of hydraulic fluid from the input, and configured to maintain the pressure of hydraulic fluid provided at the output at substantially a predetermined value.
    Type: Application
    Filed: February 10, 2010
    Publication date: January 12, 2012
    Inventors: Peter John Davey, Vernon Lester Hutchings, Harry Richard Cove
  • Patent number: 8079343
    Abstract: A positive-displacement turbine engine comprising two rotors, exhaust opening for discharging exhaust gas, intake opening for receiving air and fuel or air-fuel mixture, turbine channels, turbine shaft, plurality of turbine blades, and spark plug. The rotors share a single shaft and are positioned in the opposite sides of the combustion head. Each of the turbine channels has a constant depth and varying width and comprises an intake zone, compression zone, combustion-expansion power-stroke zone, and exhaust zone. Each of the turbine channels widens in the intake zone, narrows in the compression zone, widens in the combustion-expansion power-stroke zone, and narrows in the exhaust zone. The turbine blades maintain a constant lateral orientation while the two rotors rotate. Each turbine blade has a blade-rod with two ends and a downward-offset crank on one end of the blade-rod that maintains the turbine blade in a constant horizontal orientation during rotation of the rotors.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: December 20, 2011
    Inventor: John Howard Seagrave
  • Patent number: 7967578
    Abstract: A piston type pumping apparatus comprises a vertically oriented cylinder having a top and a bottom with a first aperture. There are first and second passageways for liquid in the cylinder at the top and bottom respectively thereof. A piston is reciprocatingly mounted within the cylinder and has an area against which pressurized fluid acts in the direction of movement of the piston. A hollow piston rod is connected to the piston and extends below the piston and slidably through the first aperture. There is a reload chamber below the cylinder. The piston rod extends slidably into the reload chamber and has a third passageway for liquid communicating thereto. A first one-way valve is located in the third passageway. There is also a fourth passageway that extends from the reload chamber to a source of liquid to be pumped and a second one-way valve therein.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: June 28, 2011
    Inventors: Richard Frederick McNichol, Gordon Bryce
  • Publication number: 20110070102
    Abstract: A compressor system includes a compressor for supplying compressed air to a commercial vehicle that has an engine with a turbocharger. Air that is pre-compressed by the turbocharger can be sucked in by the compressor via a first air supply pipe. Ambient air that is not pre-compressed can be sucked in by the compressor via a second air supply pipe. A method operates the compressor system including the compressor for supplying the compressed air to the commercial vehicle that has the engine with the turbocharger accordingly.
    Type: Application
    Filed: November 29, 2010
    Publication date: March 24, 2011
    Applicant: KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
    Inventor: Joerg MELLAR
  • Patent number: 7775102
    Abstract: A method for testing the function of a high-pressure pump having a plurality of pump elements, which each define a respective work chamber which is in communication, via a suction valve with a low-pressure region, from which fuel can be aspirated, and via a pressure valve with a high-pressure region which includes a central high-pressure fuel reservoir, serving to supply fuel to an internal combustion engine, into which high-pressure reservoir the high-pressure pump pumps the fuel aspirated from the low-pressure region, and the pressure of which is detected by a rail pressure sensor. The values detected by the rail pressure sensor are used in the built-in state of the high-pressure pump in operation of the engine for testing the function of the high-pressure pump.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: August 17, 2010
    Assignee: Robert Bosch GmbH
    Inventor: Frank Haerer
  • Patent number: 7740455
    Abstract: A system for pumping liquid having a first reservoir at a first elevation, which stores a first liquid, a second reservoir at a second elevation, where the second elevation is substantially lower than the first elevation, the second reservoir stores a second liquid, a third reservoir at a third elevation, where the third elevation is substantially lower than the first elevation, the second elevation is higher than the third elevation, the third reservoir arranged to store the second liquid, and, at least one hydraulic pump connected to the first reservoir via a first conduit, connected to the second reservoir via a second conduit, connected to the third reservoir via a third conduit, the pump arranged to be powered by the first liquid when the first liquid is permitted to fall due to gravity, the pump arranged to pump the second liquid from the third reservoir to the second reservoir.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: June 22, 2010
    Inventor: Brian Nissen
  • Patent number: 7726950
    Abstract: A fluid supply unit includes a hydraulic supply unit and a pressure generator for the fluid and a pressure outlet. A pressure booster is installed between the pressure generator and the pressure outlet and is rigidly mechanically connected with the pressure generator, wherein the pressure booster (6) is driven by a portion of the fluid generated by the pump.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: June 1, 2010
    Assignee: miniBooster Hydraulics A/S
    Inventors: Leif Hansen, Peter J. M. Clausen, Christen Espersen
  • Patent number: 7597545
    Abstract: The invention concerns a pressure amplifier that includes a low pressure inlet for supplying a medium at low pressure, a low pressure piston with a first operational area and at least one high pressure piston with a second operational area, the second area being smaller than the first area, and at least one high pressure outlet.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: October 6, 2009
    Assignee: Hartho-Hydraulic ApS
    Inventors: Harry Emil Pedersen, Thorkil Brix Pedersen
  • Patent number: 7464697
    Abstract: A fuel injection supply system includes an intensifier cylinder having an intensifier piston configured to pressurize fuel in an intensifier chamber of the cylinder during a pressurizing stroke, and further configured to draw fuel into the intensifier chamber during a recharge stroke. A fuel rail receives pressurized fuel from the intensifier chamber, and supplies the fuel to a plurality of fuel injectors. A control unit controls switching of the intensifier piston between a pressurizing stroke and a recharge stroke, controlling recharge strokes of the piston to occur between two consecutive injection events of the plurality of fuel injectors. The common fuel rail may be hydraulically locked except during injection events of any of the plurality of fuel injectors, or during a recharge stroke of the piston. The intensifier piston may be controlled to perform a recharge stroke once during each engine cycle, or more than once during each engine cycle.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: December 16, 2008
    Assignee: The United States of America, as represented by the Administrator of the U.S. Environmental Protection Agency
    Inventor: Charles L. Gray, Jr.
  • Patent number: 7451742
    Abstract: An internal combustion engine includes an engine housing, a common rail, and a pressurization device for the common rail which includes a plurality of intensifier pistons, and an hydraulically actuated control valve movable between a first position at which it fluidly connects a source of pressurized actuation fluid with one of said intensifier pistons but not a second one of the intensifier pistons, and a second position at which it fluidly connects the at least one fluid inlet with the second one of the intensifier pistons but not the first one of the intensifier pistons.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: November 18, 2008
    Assignee: Caterpillar Inc.
    Inventors: Dennis H. Gibson, Mark F. Sommars, Hoisan Kim
  • Patent number: 7175395
    Abstract: A system to intensify pressure supplied by a conventional pump where a piston assembly having two piston members at opposite ends is positioned in a pressure cylinder. The laterally outer subchambers are defined by the piston members and the cylinder and are adapted to receive fluid at an operating pressure provided by the pump and produce intensified pressure at the opposite outer subchamber. A pressure distributing system alternates returning fluid at intensified pressure to the inner subchamber near the outer subchamber creating the intensified pressure.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: February 13, 2007
    Inventor: Daniel L. Forest
  • Patent number: 7118352
    Abstract: The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by an evacuation valve. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the evacuation valve. A check valve located in the metering chamber moves from a closed to an open position on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering. The metering device may include means to regulate the length of the working stroke.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: October 10, 2006
    Assignee: Oil-Rite Corporation
    Inventors: Donald G. Gruett, Michael J. Wech
  • Patent number: 6912849
    Abstract: A cylinder driving system capable of reducing the number of hydraulic devices and the amount of energy loss and an energy regenerating method thereof are provided. To this end, the system includes i) a hydraulic cylinder, ii) a hydraulic pump having three suction/discharge ports of a first port for supplying oil to a bottom chamber of the hydraulic cylinder or draining oil from the bottom chamber, a second port for draining oil from a head chamber of the hydraulic cylinder or supplying oil to the head chamber, and a third port for draining oil from a tank or supplying oil to the tank, the suction rate or the discharge rate in the first port being the sum of the respective discharge rates or suction rates in the second port and the third port, and iii) a driving source for driving the hydraulic pump.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: July 5, 2005
    Assignee: Komatsu Ltd.
    Inventors: Hiroaki Inoue, Noboru Kanayama, Koichiro Itow, Hikosaburo Hiraki, Hideaki Saito
  • Patent number: 6887045
    Abstract: A hydraulic transformer wherein a multiplicity of displacers are guided in a displacement member. The stroke of the displacers is determined through the intermediary of a cam element, with pressure medium supply and discharge being controlled through the intermediary of a control member having at least three control grooves. In accordance with the invention either the displacement member or the cam element or the control member may be driven, whereas—depending on which component is driven—the cam element or the displacement member is mounted so as to be freely adjustable, and the remaining third component is accommodated integral with the housing.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: May 3, 2005
    Assignee: Bosch Rexroth AG
    Inventor: Rudolf Schaeffer
  • Patent number: 6866485
    Abstract: A double-acting hydraulic pressure intensifier includes a supply connection, a return connection, a high-pressure connection. An intensifier piston assembly includes a low-pressure piston arranged in a low-pressure cylinder and two high-pressure pistons connected to the low-pressure piston each arranged in a high-pressure cylinder. A switching valve assembly includes a displace able, hydraulically controlled valve element which on its two opposite sides in the direction of displacement has control pressure chambers with pressure application areas of different sizes, namely, a first control pressure chamber with a smaller pressure application area and a second control pressure chamber with a larger pressure application area. A stop plug is arranged between the second control pressure chamber and the supply connection.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: March 15, 2005
    Assignee: miniBOOSTER HYDRAULICS A/S
    Inventors: Leif Hansen, Peter J. M. Clausen, Christen Esperson, Jan Petersen
  • Publication number: 20040234382
    Abstract: A pressure transmitter for transfer of a pressure prevailing in a first medium onto a second medium, including a pressure chamber 4 in a platform 1, which chamber is separated from the first medium by means of a dividing membrane 2, wherein the pressure can be transferred by means of the second medium to a pressure measurement cell. For timely recognition of an impending failure of the dividing membrane, an early warning detector is provided with a sensor chamber 6 having an opening, which faces the first medium; and a sensor 7, which monitors a property of a medium container in the sensor chamber; and a barrier facing the first medium, pressure-tightly sealing the opening, and which, under contact with the first medium and equal conditions as experienced by the dividing membrane 2, fails earlier than the dividing membrane, thus making possible a flow connection between the sensor chamber 6 and the first medium.
    Type: Application
    Filed: June 9, 2004
    Publication date: November 25, 2004
    Inventor: Olaf Textor
  • Patent number: 6769449
    Abstract: Water is first caused to flow through a first passage and rotate a first impeller. Rotation of the first impeller is linked to rotation of a second impeller, which is in fluid communication with a second, discrete passage. Vanes on the second impeller are constrained to move faster than vanes on the first impeller. Water is subsequently caused to flow through the second passage and to be more aggressively advanced by the second impeller.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: August 3, 2004
    Inventor: Kenneth W. Stearns
  • Patent number: 6736611
    Abstract: An aircraft fluid delivery device (10) including a piston assembly (20), a pilot assembly (22), and a control assembly (24). The control assembly (24) includes non-contact proximity sensors (S1, S2) that sense the position of the piston (28) and a controller (80) that controls the pilot assembly (22), and thus the piston assembly (20), based on information received from the sensors (S1,S2). Specifically, the controller (80) energizes a solenoid (72) to cause fluid to flow through the pilot assembly (22) into a large portion of the piston chamber (30) during the compression stroke of the piston (28). When the solenoid (72) is deenergized during the return stroke of the piston (28), or when the delivery device is electrically turned off, an ejector (60) in the pilot assembly (22) generates a vacuum on the pressure side of the wide portion of the piston chamber (30).
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: May 18, 2004
    Assignee: Goodrich Corporation
    Inventors: James Putt, Michael M. Kugelman
  • Publication number: 20030113212
    Abstract: What is disclosed is a hydraulic transformer wherein a multiplicity of displacers are guided in a displacement member. The stroke of the displacers is determined through the intermediary of a cam element, with pressure medium supply and discharge being controlled through the intermediary of a control member having a least three control grooves. In accordance with the invention either the displacement member or the cam element or the control member may be driven, whereas—depending on which component is driven—the cam element or the displacement member is mounted so as to be freely adjustable, and the remaining third component is accommodated integral with the housing.
    Type: Application
    Filed: January 13, 2003
    Publication date: June 19, 2003
    Inventor: Rudolf Schaeffer
  • Patent number: 6491813
    Abstract: The equipment for desalination of water by reverse osmosis comprises: a pump 1 for drawing the water to be salinated, a high pressure pump 25, a cylindrical block 8 housing two pistons 3, 4 connected to one another by a shaft 5 and disposed, freely slidable and liquid-tight, within respective cylinders 6, 7 being part of the same block (8) and separated from one another by a central plate 9, the latter being liquid-tight; the equipment further comprises an exchange valve 14 controlled by the position of said pistons 3, 4, as well as a cylinder or, in general, one or more containers, possibly arranged in series, in parallel or in series/parallel 15, containing one or more reverse osmosis membranes (16).
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: December 10, 2002
    Assignee: Schenker Italia S.R.L.
    Inventor: Riccardo Verde
  • Patent number: 6447259
    Abstract: An energy recovery device includes at least one cylinder, a piston slidable in the cylinder, a first valve for selectively connecting one end of the cylinder to waste liquid at a first relatively high pressure and to drain and a second valve for allowing feed liquid to enter the other end of the cylinder at a second lower pressure via a feed liquid entry port and to be discharged via a feed liquid discharge port from the other end of the cylinder in response to movement of the piston caused by waste liquid entering the one end of the cylinder. A rod which extends from the other end of the cylinder and into but not through the piston, ensures that the area of the piston acting on the feed liquid is less than the area of the piston acted upon by the waste liquid so that the piston acts as a pressure intensifier to discharge feed liquid through the feed liquid discharge port at a higher pressure than the pressure of waste liquid entering the one end of the cylinder.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: September 10, 2002
    Assignee: Calder Limited
    Inventor: Peter Elliott-Moore
  • Patent number: 6390785
    Abstract: An air booster system (10) for use with a gas turbine to deliver compressed air to a combustion chamber (14) includes a first cylinder (24) with a first piston (52) reciprocal therein and a second cylinder (26) having a second piston (54) reciprocal therein. The first piston (52) is connected to the second piston (54) by a connecting rod (56) such that the first and second pistons (52, 54) reciprocate together. The air booster system (10) also includes a third cylinder (28) having a third piston (58) reciprocal therein and a fourth cylinder (30) having a fourth piston (60) reciprocal therein. The third piston (58) is connected to the fourth piston (60) by a connecting rod (62) such that the third piston (58) and the fourth piston (60) reciprocate together. Each of the cylinders (24, 26, 28, 30) are in fluid communication with a compressor (12) to receive preliminarily compressed air therefrom.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: May 21, 2002
    Assignee: The Board of Governors of Wayne State University
    Inventors: Vladimir Sheyman, Mulchand S. Rathod
  • Patent number: 6328542
    Abstract: A check valve system and method control the opening and closure of a check valve that supplies product fluid to an intensifier pump based on the position of a piston within the intensifier pump. Position sensing allows anticipation of different events along the path traveled by the piston, such as the start and end of advance, retract, and precompression cycles. The system and method operate to selectively open and close associated check valves based on the sensed position to carefully control the delivery of fluid to each intensifier pump. Active control of the check valves based on piston position allows more precise timing of fluid delivery in relation to the piston cycles. Anticipation of the onset of piston advance and retraction cycles can improve valve response time, providing more uniform fluid pressure for a continuous, steady, high pressure flow of fluid with minimal pressure fluctuation.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: December 11, 2001
    Assignee: Imation.Corp.
    Inventors: Mark Serafin, LeRoy C. Erickson
  • Publication number: 20010004442
    Abstract: An energy recovery device comprises at least one cylinder, a piston slidable in the cylinder, first valve means for selectively connecting one end of the cylinder to waste liquid at a first relatively high pressure and to drain and second valve means for allowing feed liquid to enter the other end of the cylinder at a second lower pressure via a feed liquid entry port and to be discharged via a feed liquid discharge port from said other end of the cylinder in response to movement of the piston caused by waste liquid entering said one end of the cylinder. Also, means, such as a rod which extends from the other end of the cylinder and into but not through the piston, ensures that the area of the piston acting on the feed liquid is less than the area of the piston acted upon by the waste liquid so that the piston acts as a pressure intensifier to discharge feed liquid through the feed liquid discharge port at a higher pressure than the pressure of waste liquid entering said one end of the cylinder.
    Type: Application
    Filed: December 4, 2000
    Publication date: June 21, 2001
    Inventor: Peter Elliott-Moore
  • Patent number: 6206041
    Abstract: A fluid pressure amplifier is provided, which includes a pipe for flowing fluid and having an array of holes formed therein through which fluid can flow from within the pipe in use, and resiliently-movable obturator means adjacent the pipe and operatively responsive to fluid inlet pressure in the pipe, in which fluid inlet pressure causes the obturator means to oscillate between conditions which alternately permit and prevent fluid from passing through the holes, whereby the fluid leaving the pipe has a pulsed increased pressure. The amplifier is intended for use especially to increase the pressure of water flowing through a pipe submerged in a river, to provide a pumping action to a higher level.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: March 27, 2001
    Inventor: Frederick Philip Selwyn
  • Patent number: 6206649
    Abstract: A fluid pressurization apparatus utilizing a slanted cam disk to oscillate, or to oscillate and rotate a set of piston assemblies arranged in a circle. The motion of the pistons is utilized to pressurize fluid or to perform work. The piston assemblies have multiple elements configured to allow the plungers to be engaged or disengaged to the motion of a disk by manipulating a working fluid introduced into the apparatus. By virtue of these disengageable plungers, the apparatus can be disabled and resumed at will. This apparatus is particularly well suited for pressurizing liquids such as water for high-pressure and high-flow applications.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: March 27, 2001
    Assignee: Jetec Company
    Inventor: Gene G. Yie
  • Patent number: 6179574
    Abstract: A fluid transfer apparatus utilizing a slanted cain disk to oscillate and rotate a set of pistons arranged in a circle. Channels associated with the pistons and piston housing effect the transfer of fluid from a first location to a second location, as well as the pressurization or depressurization of the fluid, during movement of the pistons. The apparatus can be used as a high-pressure fluid pump, a fluid-powered motor, a fluid distribution valve, or another fluid transfer device.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: January 30, 2001
    Assignee: Jetec Company
    Inventor: Gene G. Yie
  • Patent number: 6152222
    Abstract: A vibration-generating device for a pipe string includes a hydraulic cylinder barrel, a hydraulic piston, changeover valves, and a double tubular piston rod. Each of the changeover valves is automatically shiftable. Fluid flows through the piston rod, changeover valves, and cylinder barrel.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: November 28, 2000
    Assignee: Kveilerorvibrator AS
    Inventor: .ANG.ge Kyllingstad
  • Patent number: 6116138
    Abstract: The invention relates to a pressure transformer for the conversion of a hydraulic power from a first fluid flow having a first pressure into the hydraulic power of a second fluid flow having a second pressure. In the housing (3) a rotor (26) is mounted, able to rotate around a rotation shaft (4) due to the effect of the pressure differences between the three pipe connections (16). Around the rotation shaft chambers (24) are distributed comprising displacement means (27, 29) such as pistons (27) which, when the rotor (26) in the housing (3) rotates, vary the volume in the chambers (24) between a minimum and a maximum value, and channels (19, 22) provided with valves (20, 21) activated by the rotation of the rotor (26) and connecting each chamber (24) alternately with the first, the second and the third pipe connection (16).
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: September 12, 2000
    Assignee: Innas Free Piston B.V.
    Inventor: Peter A. J. Achten
  • Patent number: 5934392
    Abstract: Pressure amplifier mounted at the lower end of a drill pipe for deep drilling to generate an increased fluid pressure. A piston with a pressure stroke and a return stroke between end positions in a cylinder has a large piston area which during the pressure stroke is subjected to the drilling fluid pressure, a first opposite piston area and a second opposite and small piston area which during the pressure stroke generates an increased pressure in a smaller portion of the drilling fluid flow. A valve arrangement controls drilling fluid flows to and from the piston. For each end position of the piston there is provided at least one moveable valve control element which is adapted to be moved by the piston at either end position, in order to activate the valve arrangement.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: August 10, 1999
    Assignee: Den norske stats oljeselskap a.s.
    Inventor: Nils Inge Nilsen
  • Patent number: 5879137
    Abstract: A high-pressure valve assembly having a valve body that defines a preferably cylindrical valve cavity, a fluid inlet, a fluid outlet and a plurality of valve ports; and a fluid pressure intensifier assembly having a plurality of piston-plunger assemblies and utilizing the high-pressure valve assembly to distribute the working fluid. The valve assemblies have a valve rotor rotatably mounted within the valve cavity. In one embodiment, the valve rotor divides the valve cavity into a high-pressure region in communication with the fluid inlet and a low-pressure region in communication with the fluid outlet. As the valve rotor rotates, at least one and preferably three or more valve ports communicate with the power chamber and at least one and preferably three or more valve ports communicate with the discharge chamber.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: March 9, 1999
    Assignee: Jetec Corporation
    Inventor: Gene G. Yie
  • Patent number: 5632604
    Abstract: The present invention utilizes a combined dual piston and cylinder arrangement surrounded by a sleeve all mounted within a container which is in turn placed within a drill collar. The pressure of the drilling mud within the drill string drives the pressure pump of the present invention by forcing the piston up and down. Stops on the piston rod maneuver a sleeve which opens and closes inlets and outlets so that the desired flow can be obtained to drive the cylinder, piston and rod arrangement up and down. When the pistons are driven downward, drilling mud is forced through a conduit into a drill bit and out a jet nozzle at a high pressure so as to facilitate the fracturing and removal of the formation being drilled.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: May 27, 1997
    Assignee: Milmac
    Inventor: Sathyanarayanan Poothodiyil