US2592940A - Pressure transformer - Google Patents

Pressure transformer Download PDF

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Publication number
US2592940A
US2592940A US740189A US74018947A US2592940A US 2592940 A US2592940 A US 2592940A US 740189 A US740189 A US 740189A US 74018947 A US74018947 A US 74018947A US 2592940 A US2592940 A US 2592940A
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United States
Prior art keywords
pressure
cylinders
pipe
pistons
fluid
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Expired - Lifetime
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US740189A
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English (en)
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Monoyer Maurice
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Individual
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Publication of US2592940A publication Critical patent/US2592940A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1172—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor

Definitions

  • the invention relates to the combination of an hydraulic pressure transformer with a low pressure pump and in particular with a centrifugal pump for the purpose of continuously delivering a liquid at high pressure.
  • An object of the invention is to provide a new combination of elements which is adapted to supply a continuous delivery of liquid at high pressure when supplied with driving liquid at a low pressure from a centrifugal pump.
  • Another object of the invention is to provide a combination of elements in which a centrifugal pump is supplying liquid at low pressure to a pressure transformer through a rotating distributor for driving differential double-acting pistons moving in low pressure cylinders having equal'diameter while the high pressure cylinders located at each end of each low pressure cylinder have diameters different from one another.
  • Still another object of the invention is to'provide a combination of a centrifugal pump with a pressure transformer in which the high pressure cylinders are alternately located around the rotating distributor so that the high pressure cylinders of a certain diameter are located between high pressure cylinders of different diameters.
  • Still another object of the invention consists in providing on the discharging pipe an automatic device for controlling the pressure of the exhausted liquid which comprises a chamber having two valves, one of which moves under the joint action of the pressures of the driving fluid and of the discharged fluid While the other is actuated under the action of the driving fluid only.
  • Figure 1 is a diagrammatic sectional view showing the principle of operation of the combination according to the invention.
  • Figure 2 is a diagrammatic sectional view particularly illustrating an automatic device on the discharging pipe.
  • Figure 3 is a diagrammatic sectional view showing a combination in which the high pressure cylinders have difierent diameters.
  • Figure 4 is a 'transversal sectional view through a combination with six differential pistons, wherein the high pressure cylinders of different diameter are alternately located around th distributor.
  • Figures 5, 6 and 7 are sectional views through the automatic device, the latter being respectively 'at rest, at the time of being actuated by the liquid at low pressure and at the time of being actuated at high pressure.
  • Figure 8 is a view partly in section and partly in perspective for illustrating the-speed reducing device.
  • a pump 1 draws liquid from a tank 2 and delivers it at low pressure through a pipe 3, which divides into two branches 6 and l, a rotary distributor 4, which is actuated by a pulley 5 and which puts these branches into communication with one or the other of the faces of a piston l0, freely sliding in a cylinder 12.
  • Two other pistons H and Ila. connected to the piston I! slide in two other cylinders l3 and [3a. l4 and I 5 are passages through the distributor 4, communicating with the pipes l and 6 respectively.
  • the passage 15 of the distributor i is open, the passage M being closed, then the liquid arriving from the pump I through the pipe '6 traverses the distributor 4 and goes into a chamber 12a in the cylinder 12, so as to act upon the face 9 of the piston Ill, thus urging the differential piston Ill-l li la towards the left and producing a partial vacuum in the compression chamber Hi.
  • the chamber l2a is filled with liquid coming from the pipe 6.
  • the distributor 4 continuing its course opens the passage l4, thus enabling the liquid coming from the pipe 1 to.
  • the differential piston Hlll returns towards the right, compressing in the chamber It the liquid contained therein, which closes the valve I8 and opens a valve l9, which admits the liquid to a channel 29, leading to the service pipe 2
  • the liquid contained in the chamber I20 returns to the tank 2 by a pipe 22 through a separate passage, not shown, provided in the distributor 4, which communicates with a pipe-line, not shown, and the cycle recommences with the opening of the port l5, the closing of the port Hi, and the opening of the ports, not shown, that enable the fluid contained in the chamber 121) to return to the tank 2.
  • FIG. 2 represents an application of the in vention.
  • two differential pistons 2i and 22 are represented, moving in cylinders 29 and 3%! respectively.
  • a distributor 25 turning in a casing 26 is actuated through the medium of a pulley 24 by a motor 23.
  • an annular crown-member 2'l2la is constructed in such a manner that the fluid can pass into the cylinders 29 and 38 on to one or the other face of the pistons 21 and 22 according to the position of ports 3
  • FIG. 1 represents the apparatus at the time when the distributor is so placed that the annular crown-member 21--2Ta enables the fluid to pass from the port 32 on to the face 34 of the piston 2
  • the fluid is also directed into compression chambers 31 and 38 through pipes 35 and 36 by opening valves 39 and 4B.
  • the piston 2i is therefore urged upwards and the piston 22 downwards.
  • This movement first has the effect of delivering the fluid contained in the portions 45 and 46 of the cylinders 29 and 30 through pipes 43 and 44 and through a central pipe-system 41 to the tank 2, and then of compressing the fluid that had been admitted into the compression chambers 48 and 49 during the preceding stroke, thus compelling the valves 50 and to open and to allow the fluid to pass into a pipe-system 52-5354-55, the end 55 of which leads to an automatic device 56, which feeds the service pipe 51.
  • Automatic working is eifected by interposing an automatic device 56 ( Figure 2), as hereinbefore stated.
  • a pipe system 58 branched on the supply pipe 3 of the centrifugal pump is connected to the device 56, and the delivery of this pump constitutes the approach delivery at low pressure.
  • the centrifugal pump l delivers into the pipe system 58, and raises the valve 59, and the fluid travels towards the service pipe 5'! (see also Figure 6).
  • the valve 60 is kept on its seat by the action of a strong adjustable spring pressing upon this valve through the medium of a piston 6
  • the pipe system 55 is therefore shut off by the valve 60, and hence there is established in the pipe system 525354-55 a pressure equal to the maximum pressure which is capable of being produced by the small pistons Condelivery of the pump l.
  • valve 59 is closed by the action of its return spring, since the delivery is zero;
  • the pressure-transformer begins to function. Indeed, the pressure in the pipe system 525354-55 having fallen, the small pistons 62, 63, 64 and 65 are no longer subjected to a force capable of counteracting the force acting upon the pistons 2
  • the second stage of the press operation now begins, that is to say, the stage of the highpressure stroke.
  • This stroke will continue until the maximum pressure has been reached in the pipe system 51, which pressure will be that causing the pistons 62, 63, 64 and to be immobilised as hereinbefore explained.
  • the pipe system 51 is again put into communication with the press (the pressure of which has been previously reduced to zero) which has the effect of returning the valve 60, to its seat through the action of a spring 63, which is no longer balanced by the force on the piston 6
  • This automatic apparatus is, in this case, the apparatus represented at -I0 in Figure 3.
  • tubes or ducts 84a, 85a, 86 a, 8117, which are inside pistons 84, 85, 88 and 81, provided with valves-8412,1351), 88b and 81b respectively at their ends, :and communicating with the chambers of the :[IliSiJQHS 82 and :83 throughv lateral openings, these tubes thusenabling the part of the fluid to be compressed to enter the compression chambers 88, 8.9,, 90 and 9
  • TI is a retaining, or non-return valve located .at the low pressure
  • 12 is a valve loaded with an adjustable spring for the meanpressure delivery
  • I3 is .a valve loaded with an adjustable springfor 'the high-pressure delivery.
  • the'pistons 84 and 85 being automatically immobilised because they cannot overcome the pressure established in the manifold 92, which is greater than the pressure that canbe produced by the pistons 84 and 85.
  • An electric motor 95 with a vertical shaft is the sole source of motive power for the unit
  • is-set-inmotion by means of a speed-reducing device with gear wheels 08, it-
  • the mode ,of operation is identical with that ofthe apparatus illustrated in Figure 2, with the modification that when the low-pressure deliveryrterminates. the valve 12 opens under the action of the. :pressure on thepiston, and,
  • Figures .3 and 4 show a form of construction of .a .pressqpump so arranged as to operate the centrifugal pump and the distributor by the same source of. power.
  • a centrifugal pump 16 sucks the liquid from a tank 11 forming a.s.tand.forrthe group, through-1a filter l8, and discharges the said liquid at a .low pressure through channels I9 into an annular chamber.
  • effects the successive dis tribution of the liquid between groups of pistons 82 and 83, which are thereby actuated with a reciprocating motion, as are also the mediumpressure pistons 84- and 85, and the high-presesure pistons 88 and 81, which discharge into chambers 88, 89, 90 and 9
  • FIG. 8 gives details of the speed-reducing
  • the speed-reducing device is constructed as follows: .A main shaft 91, connecting the motor to the centrifugal pump, carries a pinion 98, which engages with two toothed wheels 99 and I00. These two toothed wheels are mounted upon spindles I0'I and '
  • comprises a series of passages. I08 and I09 which traverse the vwall, and of cells III! and III, which have no communication with the inside of the distributor sheath 8
  • this distributor turns; one cell IIO puts an annular channel II 2II2a, which is under pressure, into communication with the lower face .of the piston 83 through a channel IYI4,
  • the low-pressure feed pump may be omitted if use be made of a driving fluid at low pressure drawn from an existing supply pipe (water from a hydraulic main or the like).
  • the rotation of the rotary distributor is effected by means of a separate small motor, or by any other device, turbine for example, using the driving fluid.
  • a centrifugal pump of a pressure transformer comprising a plurality of low pressure cylinders, a high pressure cylinder at each end of each low pressure cylinder, a difierential piston moving in each of said cylinders, a rotating distributor located between said cylinders for alternatively supplying fluid from said centrifugal pump to the opposite sections of the low pressure cylinders and to the high pressure cylinders, an external means for driving said rotating distributor, a discharging pipe, an automatic device located on said discharging pipe for controlling the pressure of the exhausted fluid, said automatic device comprising a chamber provided with two valves, one of which moving under the joint action of the pres sures of the driving fluid and of the discharged fluid, the other moving under the action of the driving fluid only.
  • a centrifugal pump of a pressure transformer comprising a plurality of low pressure cylinders having the same diameters, a high pressure cylinder at each end of each low pressure cylinder, some high pressure cylinders having equal diameters, a differential piston moving in each of said cylinders, a rotating distributor located between said cylinders for alternatively supplying fluid from said centrifugal pump to the opposite sections of the low pressure cylinders and to the high pressure cylinders, an external means for driving said rotating distributor, a discharging pipe, an au tomatic device located on said discharging pipe, said automatic device comprising a chamber provided with two valves, one of which moving under the joint action of the driving fluid and of the discharged fluid, the other moving under the action of the driving fluid only.
  • a centrifugal pump of a pressure transformer comprising a plurality of low pressure cylinders having the same diameters, a high pressure cylinder at each end of each low pressure cylinder, half the number of the high pressure cylinders having diameters different from those of the other half, a differential piston moving in each of said cylinders, a rotating distributor located between said cylinders for alternatively supplying fluid from said centrifugal pump to the opposite sections of the low pressure cylinders and to the high pressure cylinders, an external means for driving simultaneously said rotating distributor and said pump, a discharging pipe, an automatic device located on said discharging pipe, said automatic device comprising a chamber provided with two valves, one of which moves under the joint action of the pressures of the driving fluid and of the discharged fluid and the other under the action of the driving fluid only.
  • a centrifugal pump of a pressure transformer comprising a plurality of low pressure cylinders, a high pressure cylinder at each end of each low pressure cylinder, a differential piston moving in each of said cylinders, a rotating distributor located between said cylinders for alternatively supplying fluid from said centrifugal pump to the opposite sections of the low pressure cylinders and to the high pressure cylinders, an external means-for driving said rotating distributor, a discharging pipe, an automatic device located on said discharging pipe for controlling the pressure of the exhausted fluid, said automatic device comprising a chamber provided with two valves, one of which moving under the joint action of the pressures of the driving fluid and of the discharged fluid, the other moving under the action of the driving fluid only, said low pressure cylinders havingequal diameter and said high pressure cylinders having different diameters.
  • a centrifugal pump of the pressure transformer comprising a plurality of low pressure cylinders, a high pressure cylinder at each end of each low pressure cylinder, a diflerential piston moving in each of said cylinders, a rotating distributor located between said cylinders for alternatively supplying fluid from said centrifugal pump to the opposite sections of the low pressure cylinders and to the high pressure cylinders, an external means for driving said rotating distributor, a discharging pipe, an automatic device located on said discharging pipe for controlling the pressure of the exhausted fluid, said automatic device comprising a chamber provided with two valves, one of which moving under the joint action of the pres-'- sure of the driving fluid and of the discharged fluid, the other moving under the action of the driving fluid only, said low pressure cylinders having equal diameter and said'high pressure cylinders having different diameters, said high pressure cylinders being arranged around the rotating distributor so that the high pressure cylinders having a certain diameter are located between the high pressure cylinders of a

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Reciprocating Pumps (AREA)
US740189A 1946-04-16 1947-04-08 Pressure transformer Expired - Lifetime US2592940A (en)

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BE646135X 1946-04-16

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BE (1) BE464613A (th)
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GB (1) GB646135A (th)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689527A (en) * 1949-02-11 1954-09-21 Borg Warner Fuel injector pump
US2698580A (en) * 1950-01-26 1955-01-04 Cav Ltd Pump
US2708412A (en) * 1950-12-02 1955-05-17 Mueller Otto Booster for increasing delivered hydraulic pressure
US2819835A (en) * 1954-11-26 1958-01-14 Harwood Engineering Co System for delivering a continuous and steady flow of a compressible fluid at high pressure
US2829501A (en) * 1953-08-21 1958-04-08 D W Burkett Thermal power plant utilizing compressed gas as working medium in a closed circuit including a booster compressor
US2867893A (en) * 1955-09-01 1959-01-13 Arne O Andresen Descaling apparatus for forging ingots
US2935952A (en) * 1957-06-12 1960-05-10 Howard E Rose Pressure booster or de-booster
US2961741A (en) * 1956-05-09 1960-11-29 American Steel Foundries Hydraulic descaler
US2970546A (en) * 1958-04-23 1961-02-07 Howard T White Fluid pressure systems
US3022738A (en) * 1959-04-20 1962-02-27 Krute Everett Archie Pump systems
US3033218A (en) * 1959-09-21 1962-05-08 Fairchild Stratos Corp Fluid proportioner
US3181286A (en) * 1958-11-05 1965-05-04 Nat Tank Co Apparatus for recovering hydrocarbons and liquids from gas streams
US3266422A (en) * 1957-12-27 1966-08-16 Rudolph A Matheisel Rechargeable accumulator system for auxiliary power supply
US3314367A (en) * 1965-09-20 1967-04-18 Crane Co Hydraulic transformer
US3344714A (en) * 1964-10-05 1967-10-03 Wilkins & Ass Fluid pressure transmission system
US3450055A (en) * 1966-06-24 1969-06-17 Lucas Industries Ltd Fluid proportioning devices
US3487892A (en) * 1968-05-31 1970-01-06 William J Kiefer Positive displacement lubrication system
US3604213A (en) * 1969-01-10 1971-09-14 Herbert Leland Parsons Chemical grouting proportioning pumping method and apparatus
US4235154A (en) * 1978-04-24 1980-11-25 Neumann Engineering & Manufacturing Company Vibration motor
US4373874A (en) * 1979-07-30 1983-02-15 Albert Phillips Fluid actuated pump system
US4378784A (en) * 1980-02-20 1983-04-05 Grumman Aerospace Corporation Solar heating system
US4714411A (en) * 1985-06-24 1987-12-22 Normalair-Garrett (Holdings) Limited Fluid pressure intensifier device
US4752192A (en) * 1986-06-13 1988-06-21 Ab Asea-Atom Rotating drum pump having a plurality of fluid driven pistons
US4780064A (en) * 1986-02-10 1988-10-25 Flow Industries, Inc. Pump assembly and its method of operation
US4919039A (en) * 1988-07-25 1990-04-24 General Electric Company Hydraulic turning gear
US5205722A (en) * 1991-06-04 1993-04-27 Hammond John M Metering pump
US5387090A (en) * 1993-04-15 1995-02-07 Knf Neuberger Gmbh Two-stage positive displacement pump
US20070240595A1 (en) * 2006-04-18 2007-10-18 Heidelberger Druckmaschinen Ag Method and apparatus for metering printing fluid, printing press and system having the apparatus and method for driving a pump
US7740455B1 (en) 2007-07-09 2010-06-22 Brian Nissen Pumping system with hydraulic pump
WO2014138998A1 (en) 2013-03-14 2014-09-18 Atomic Energy Of Canada Limited / Énergie Atomique Du Canada Limitée Regulator apparatus having a charging valve assembly and a flow multiplier assembly
FR3039596A1 (fr) * 2015-07-27 2017-02-03 Patrick Picard Pompe et dispositifs et installations comprenant une telle pompe
RU2639454C2 (ru) * 2015-10-13 2017-12-21 Сергей Иванович Золотухин Устройство для динамического повышения давления с функцией сглаживания пульсаций гидравлической жидкости
WO2020205689A1 (en) * 2019-03-29 2020-10-08 Southwest Research Institute Centrifugal compressor with piston intensifier

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213692B (de) * 1966-03-31 Ruhrkohlen Beratung G M B H Hydrostatische Getriebeanordnung zur Erzeugung geradliniger Wechselbewegungen bei Arbeitsmaschinen mit Umsteuereinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US38531A (en) * 1863-05-12 Improvement in water-engines
US305972A (en) * 1884-09-30 Axel sjogeen
US1377585A (en) * 1919-07-18 1921-05-10 Johanson Reiert Hydraulic transformer
US2053543A (en) * 1932-01-18 1936-09-08 Continental Motors Corp Fuel pumping system for engines
US2484884A (en) * 1946-06-10 1949-10-18 Hanna Engineering Works Hydraulic transformer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US38531A (en) * 1863-05-12 Improvement in water-engines
US305972A (en) * 1884-09-30 Axel sjogeen
US1377585A (en) * 1919-07-18 1921-05-10 Johanson Reiert Hydraulic transformer
US2053543A (en) * 1932-01-18 1936-09-08 Continental Motors Corp Fuel pumping system for engines
US2484884A (en) * 1946-06-10 1949-10-18 Hanna Engineering Works Hydraulic transformer

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689527A (en) * 1949-02-11 1954-09-21 Borg Warner Fuel injector pump
US2698580A (en) * 1950-01-26 1955-01-04 Cav Ltd Pump
US2708412A (en) * 1950-12-02 1955-05-17 Mueller Otto Booster for increasing delivered hydraulic pressure
US2829501A (en) * 1953-08-21 1958-04-08 D W Burkett Thermal power plant utilizing compressed gas as working medium in a closed circuit including a booster compressor
US2819835A (en) * 1954-11-26 1958-01-14 Harwood Engineering Co System for delivering a continuous and steady flow of a compressible fluid at high pressure
US2867893A (en) * 1955-09-01 1959-01-13 Arne O Andresen Descaling apparatus for forging ingots
US2961741A (en) * 1956-05-09 1960-11-29 American Steel Foundries Hydraulic descaler
US2935952A (en) * 1957-06-12 1960-05-10 Howard E Rose Pressure booster or de-booster
US3266422A (en) * 1957-12-27 1966-08-16 Rudolph A Matheisel Rechargeable accumulator system for auxiliary power supply
US2970546A (en) * 1958-04-23 1961-02-07 Howard T White Fluid pressure systems
US3181286A (en) * 1958-11-05 1965-05-04 Nat Tank Co Apparatus for recovering hydrocarbons and liquids from gas streams
US3022738A (en) * 1959-04-20 1962-02-27 Krute Everett Archie Pump systems
US3033218A (en) * 1959-09-21 1962-05-08 Fairchild Stratos Corp Fluid proportioner
US3344714A (en) * 1964-10-05 1967-10-03 Wilkins & Ass Fluid pressure transmission system
US3314367A (en) * 1965-09-20 1967-04-18 Crane Co Hydraulic transformer
US3450055A (en) * 1966-06-24 1969-06-17 Lucas Industries Ltd Fluid proportioning devices
US3487892A (en) * 1968-05-31 1970-01-06 William J Kiefer Positive displacement lubrication system
US3604213A (en) * 1969-01-10 1971-09-14 Herbert Leland Parsons Chemical grouting proportioning pumping method and apparatus
US4235154A (en) * 1978-04-24 1980-11-25 Neumann Engineering & Manufacturing Company Vibration motor
US4373874A (en) * 1979-07-30 1983-02-15 Albert Phillips Fluid actuated pump system
US4378784A (en) * 1980-02-20 1983-04-05 Grumman Aerospace Corporation Solar heating system
US4714411A (en) * 1985-06-24 1987-12-22 Normalair-Garrett (Holdings) Limited Fluid pressure intensifier device
US4780064A (en) * 1986-02-10 1988-10-25 Flow Industries, Inc. Pump assembly and its method of operation
US4752192A (en) * 1986-06-13 1988-06-21 Ab Asea-Atom Rotating drum pump having a plurality of fluid driven pistons
US4919039A (en) * 1988-07-25 1990-04-24 General Electric Company Hydraulic turning gear
US5205722A (en) * 1991-06-04 1993-04-27 Hammond John M Metering pump
US5584669A (en) * 1993-04-15 1996-12-17 Knf Neuberger Gmbh Two-stage positive displacement pump
US5387090A (en) * 1993-04-15 1995-02-07 Knf Neuberger Gmbh Two-stage positive displacement pump
US20070240595A1 (en) * 2006-04-18 2007-10-18 Heidelberger Druckmaschinen Ag Method and apparatus for metering printing fluid, printing press and system having the apparatus and method for driving a pump
US7740455B1 (en) 2007-07-09 2010-06-22 Brian Nissen Pumping system with hydraulic pump
WO2014138998A1 (en) 2013-03-14 2014-09-18 Atomic Energy Of Canada Limited / Énergie Atomique Du Canada Limitée Regulator apparatus having a charging valve assembly and a flow multiplier assembly
EP2971800A4 (en) * 2013-03-14 2016-11-23 Atomic Energy Of Canada Ltd Énergie Atomique Du Canada Limitée CONTROL DEVICE WITH A LOAD VALVE ASSEMBLY AND A FLOW VALVE ASSEMBLY
US9976703B2 (en) 2013-03-14 2018-05-22 Atomic Energy Of Canada Limited/Énergy Atomique Du Canada Limitée Regulator apparatus having a charging valve assembly and a flow multiplier assembly
FR3039596A1 (fr) * 2015-07-27 2017-02-03 Patrick Picard Pompe et dispositifs et installations comprenant une telle pompe
RU2639454C2 (ru) * 2015-10-13 2017-12-21 Сергей Иванович Золотухин Устройство для динамического повышения давления с функцией сглаживания пульсаций гидравлической жидкости
WO2020205689A1 (en) * 2019-03-29 2020-10-08 Southwest Research Institute Centrifugal compressor with piston intensifier

Also Published As

Publication number Publication date
FR949636A (fr) 1949-09-05
BE464613A (th)
GB646135A (en) 1950-11-15

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