US3769881A - Hydraulic device - Google Patents

Hydraulic device Download PDF

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Publication number
US3769881A
US3769881A US00151393A US3769881DA US3769881A US 3769881 A US3769881 A US 3769881A US 00151393 A US00151393 A US 00151393A US 3769881D A US3769881D A US 3769881DA US 3769881 A US3769881 A US 3769881A
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Prior art keywords
synchronizing
cells
pistons
hydraulic cylinders
fluid
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Expired - Lifetime
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US00151393A
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English (en)
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K Aoki
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Individual
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Individual
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    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors

Definitions

  • ABSTRACT A hydraulic device comprising a plurality of hydraulic cylinders, a synchronizing device having fluid chambers of the same number as that of the hydraulic cylinders but having far smaller inside volume than that of the hydraulic cylinders, each fluid chamber including a synchronizing piston within the: chamber, all of said pistons being rigidly connected together so that the pistons are operable simultaneously, and transfer valves of a number equal to that of the hydraulic cylinders, cylinder heads of the hydraulic cylinders being connected to cells formed at one side of the fluid chambers of the synchronizing device, cells formed at another side of the fluid chambers being connected to a pressurized fluid source, and the transfer valves being connected in these connection lines.
  • a primary objectof the presentinvention is to provide an improved hydraulic device wherein all of the drawbacks of theconventional hydraulic devices are. totally eliminated.
  • Another objectof the present invention is to provide a hydraulic device wherein theoperation ofa plurality of hydraulic. cylinders can be achieved through asynchronizing device of a simple construction requiring no manual adjustment for a longperiodof operation.
  • the synchronizingdevice constituting an important part of the presentwinvention, comprises fluid chambers ofthe-same numbervas that of thehydraulic cylinders but having a far smaller inside volume than thatof the. hydraulic cylinder, and pistons eachincluded in one of the fluid chambers. All of the pistonsare rigidly connected togetherso that those pistons are operated simultaneously in all of the hereinafter described operations ofthe synchronizing device. Furthermore, all of the fluid lines connected to the hydraulic cylinder heads of the hydraulic device are connected'to either side of cells formed inside of thefluidrchambers bythe existence of the pistons of the synchronizing device, so that the pressurizedfluid is-suppliedtinto or delivered out of the hydraulic.
  • each of the transfer valves is inter posed between a pressurizedfluidsource and a cylinder head of the hydraulic cylinders, and the transfer valve is electrically operated at an instant the. displacement of the synchronizing pistons integrally combined.
  • FIGS. 1 and 2 are schematic views, partly in section, of a hydraulic device constituting a preferred embodiment of the present invention at respective instants during the upward movement of the pistons;
  • FIG. 3 is a schematic view, partly in section, of a hydraulic device of the same embodiment at an instant during the downward movement of the piston;
  • FIG. 4 is a schematic view, partly in section, of a hy-, draulic device constituting another embodiment of the. invention.
  • hydraulic cylinders 1, 1' including pistons 10, 10, respectively, asynchronizing device generally denoted by 2, transfer valves 3, 3', and a fluid direction change-over valve 4.
  • the above described synchronizing device 2. com prises fluid chambers 5, 5' of the same. number as that of the hydraulic cylinders l, 1' but having far smaller inner volumes than those of the latter cylinders, and
  • synchronizing pistons 6, 6' included in these. fluid chambers 5,5, respectively, and the synchronizingpistons 6, 6 are rigidly connected together by means of tie plates 7, 7' attached to both, ends ofthesepistons 6, 6'.
  • the hydraulic cylinders l, 1' are respectively divided into two chambers A, C, and A, C. by theexistence of the pistons 10, 10', and each of the fluidchambers 5,
  • 5* is also divided into two synchronizingcells B, D, and
  • the chamber A and cell B, and the chamber A and cell B are respectively connected by fluid lines 8, 8', and the chambers C, C, and cells D, D are all connected to the.
  • fluid to the synchronizing device 2 are disposed respec tively between hydraulic cylinders l, I and the. syn.-
  • the transfer valves3, 3 can act for both of the fluid lines 8, 11,.and8', 111', respectively. That is, the pressurized fluid is alternately sent into the cells B, B', and D, D under the transferringioperation of the transfer valves-3,3, andalso is sent to the chambers A, A inthe hydraulic cylinders 1,1.
  • the pressurized fluid sent into the chambers 5, 5' of the synchronizing device 2 is successively and by a constant amount supplied into the hydraulic cylinders 1, l by means of the synchronizing pistons 6, 6' operated simultaneously because of the rigid combination therebetween, whereby the two pistons 10, 10 are elevated upwardly under the same pressure and at the same speed.
  • the fluid direction change-over valve 4 is transferred to a position as shown in FIG. 3.
  • the pressurized fluid P is now sent into the chambers C, C of the hydraulic cylinders I, 1 through the fluid line 9.
  • the pistons l0, 10 are descended and the pressurized fluid in the chambers A, A is exhausted through the lines 8, 8' into the cells B, B of the synchronizing device 2, whereby the rigidly combined pistons 6, 6' are shifted downwardly.
  • the fluid in the cells D, D are exhausted through lines l1, 11' respectively to the change-over valve 4 and thereafter to a reservoir of the pressurized fluid (not shown).
  • FIG. 4 there is indicated another embodiment of the present invention, wherein the fluid chambers 5, 5' in the synchronizing device 2 are disposed longitudinally on a single shaft. That is, the synchronizing pistons 6, 6' included in these chambers 5, 5' are mounted on the single shaft 12 so that the pistons 6, 6 are combined rigidly in a cooperative state.
  • the operation of this embodiment is quite the same as the previous embodiment of the invention shown in FIGS. 1 through 4.
  • the hydraulic cylinders can be operated in synchronism under the reciprocating operations of the synchronizing pistons included in the fluid chambers of the synchronizing device.
  • a hydraulic device comprising:
  • each of said fluid chamber including a synchronizing piston within and dividing said fluid chamber into first and second synchronizer cells;
  • G a second set of lines operatively connecting said second cylinder cells to said first synchronizer cells
  • transfer valves of a number equal to that of the hydraulic cylinders connected into both said sets of lines opening into said synchronizer cells operable for controlling flow selectively into and out of said first and second cylinder cells upon movement of said pistons in opposite predetermined directions;
  • a fluid direction changeover valve interconnected in both said sets of lines leading to said source of fluid pressure.
  • a hydraulic device as claimed in claim 1 including means operable upon movement of said synchronizing pistons to predetermined upper and lower end positions to switch said transfer valves to reverse flow into and out of said first and second synchronizer cells and thereby into and out of said first and second cylinder chambers to move said piston heads in said hydraulic cylinders.
  • a hydraulic device as in claim 2 wherein said synchronizing cells of said synchronizing device are disposed in parallel, and respective opposite ends of the synchronizing pistons are rigidly connected by means of tie plates so that the synchronizing pistons are operaposed in series, and said synchronizing pistons included ble in unison. in the series are mounted on a single shaft provided 4.
  • a hydraulic device as in claim 2 wherein said synthrough said cells.
  • chronizer cells of said synchronizing device are dis-

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
US00151393A 1970-06-17 1971-06-09 Hydraulic device Expired - Lifetime US3769881A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5207770 1970-06-17

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US3769881A true US3769881A (en) 1973-11-06

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US (1) US3769881A (enExample)
DE (1) DE2129322B2 (enExample)
GB (1) GB1347758A (enExample)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162750A (en) * 1977-09-19 1979-07-31 Normand Demers Measuring and dispensing apparatus
US4192222A (en) * 1976-07-13 1980-03-11 Transform Verstarkungsmaschinen Aktiengesellschaft Power piston apparatus
WO1983001760A1 (en) * 1981-11-20 1983-05-26 Applied Power Inc Cabtilt system with synchronizing valve
US4586424A (en) * 1982-06-11 1986-05-06 Bochumer Eisenhutte Heintzmann Gmbh & Co. Kg Hydraulic control arrangement
WO1986005243A1 (en) * 1985-03-05 1986-09-12 Nilsson Nils Enar A device for synchronized hydraulic fluid supply of two or more hydraulic motors
US4706458A (en) * 1985-06-24 1987-11-17 Corghi Elettromeccanica S.P.A. Hydraulic system for controlling motor vehicle lifts in general
WO2002025119A1 (en) * 2000-09-20 2002-03-28 Morphic Technologies Aktiebolag Hydraulic arrangement
US6363832B1 (en) 2000-06-21 2002-04-02 Caterpillar Inc. Method and apparatus for minimizing loader frame stress
US20040163894A1 (en) * 2002-04-12 2004-08-26 Delaware Capital Formation Method and apparatus for synchronizing a vehicle lift
US20050172796A1 (en) * 2004-02-09 2005-08-11 Bair Eugene C. Hydraulic system for synchronized extension of multiple cylinders
US20050172797A1 (en) * 2004-02-09 2005-08-11 Bair Eugene C. Hydraulic system for synchronized extension of multiple cylinders
US7322190B2 (en) 2004-02-09 2008-01-29 Jr Automation Technologies Llc Hydraulic system for synchronized extension of multiple cylinders
US20080271445A1 (en) * 2007-05-01 2008-11-06 J.R. Automation Technologies, Llc Hydraulic circuit for synchronized horizontal extension of cylinders
ITVI20100247A1 (it) * 2010-09-13 2012-03-14 Francesco Fiorese Dispositivo per il rilevamento del reciproco dislivello dei supporti del carico nei ponti sollevatori per veicoli
US8920145B2 (en) 2010-11-29 2014-12-30 Gta Innovation, Llc Synchronized hydraulic power module
CN104314907A (zh) * 2014-10-12 2015-01-28 郑州大学 一种顶管用的液压系统
CN106015159A (zh) * 2016-07-12 2016-10-12 天津优瑞纳斯液压机械有限公司 一种非等容积同步分配器液压缸
US10087958B2 (en) 2012-04-19 2018-10-02 Cascade Corporation Fluid power control system for mobile load handling equipment
CN109281884A (zh) * 2018-11-27 2019-01-29 中国葛洲坝集团第二工程有限公司 模板同步液压顶升控制系统

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59500004A (ja) * 1982-01-13 1984-01-05 キヤタピラ−　インダストリアル　インコ−ポレ−テツド プログラム電気流体式制御回路を持つコンテナ取扱装置
DE3205666A1 (de) * 1982-02-17 1983-08-25 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Vorrichtung zur steuerung hydraulischer schubkolbengetriebe
AT377833B (de) * 1983-06-17 1985-05-10 Achleitner Herbert Antriebsanordnung mit zwei oder mehreren hydraulischen zylinder-kolbeneinheiten
GB2244521A (en) * 1990-04-24 1991-12-04 Peter Arnold Mishcon Structure pivotable by hydraulic rams
GB2403512B (en) * 2001-05-03 2005-07-06 Clear Well Subsea Ltd Hydraulic piston assembly
GB0110821D0 (en) 2001-05-03 2001-06-27 Clear Well Subsea Ltd Making Connections to pipes uner pressure
CN102852871B (zh) * 2012-09-19 2014-12-10 中国核动力研究设计院 用于松动反应堆顶盖时顶升顶盖的液压系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1831238A (en) * 1928-02-29 1931-11-10 Oilgear Co Multiple hydraulic drive
US2410603A (en) * 1944-09-01 1946-11-05 Paul P M Dubosclard Forming roll
DE1044625B (de) * 1957-04-25 1958-11-20 Pumpenfabrik Urach Einrichtung zur Regelung des Gleichlaufs mehrerer hydraulisch betaetigter Arbeitskolben

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1831238A (en) * 1928-02-29 1931-11-10 Oilgear Co Multiple hydraulic drive
US2410603A (en) * 1944-09-01 1946-11-05 Paul P M Dubosclard Forming roll
DE1044625B (de) * 1957-04-25 1958-11-20 Pumpenfabrik Urach Einrichtung zur Regelung des Gleichlaufs mehrerer hydraulisch betaetigter Arbeitskolben

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192222A (en) * 1976-07-13 1980-03-11 Transform Verstarkungsmaschinen Aktiengesellschaft Power piston apparatus
US4162750A (en) * 1977-09-19 1979-07-31 Normand Demers Measuring and dispensing apparatus
WO1983001760A1 (en) * 1981-11-20 1983-05-26 Applied Power Inc Cabtilt system with synchronizing valve
US4452328A (en) * 1981-11-20 1984-06-05 Applied Power Inc. Cabtilt system with synchronizing valve
US4586424A (en) * 1982-06-11 1986-05-06 Bochumer Eisenhutte Heintzmann Gmbh & Co. Kg Hydraulic control arrangement
WO1986005243A1 (en) * 1985-03-05 1986-09-12 Nilsson Nils Enar A device for synchronized hydraulic fluid supply of two or more hydraulic motors
US4706458A (en) * 1985-06-24 1987-11-17 Corghi Elettromeccanica S.P.A. Hydraulic system for controlling motor vehicle lifts in general
US6363832B1 (en) 2000-06-21 2002-04-02 Caterpillar Inc. Method and apparatus for minimizing loader frame stress
WO2002025119A1 (en) * 2000-09-20 2002-03-28 Morphic Technologies Aktiebolag Hydraulic arrangement
US6964322B2 (en) * 2002-04-12 2005-11-15 Delaware Capital Formation, Inc. Method and apparatus for synchronizing a vehicle lift
US20040163894A1 (en) * 2002-04-12 2004-08-26 Delaware Capital Formation Method and apparatus for synchronizing a vehicle lift
US20050172796A1 (en) * 2004-02-09 2005-08-11 Bair Eugene C. Hydraulic system for synchronized extension of multiple cylinders
US20050172797A1 (en) * 2004-02-09 2005-08-11 Bair Eugene C. Hydraulic system for synchronized extension of multiple cylinders
US7047738B2 (en) 2004-02-09 2006-05-23 Jr Automation Technologies, Llc Hydraulic system for synchronized extension of multiple cylinders
US7134280B2 (en) 2004-02-09 2006-11-14 J.R. Automation Technologies, Llc Hydraulic system for synchronized extension of multiple cylinders
US7322190B2 (en) 2004-02-09 2008-01-29 Jr Automation Technologies Llc Hydraulic system for synchronized extension of multiple cylinders
US20080271445A1 (en) * 2007-05-01 2008-11-06 J.R. Automation Technologies, Llc Hydraulic circuit for synchronized horizontal extension of cylinders
US7926410B2 (en) 2007-05-01 2011-04-19 J.R. Automation Technologies, L.L.C. Hydraulic circuit for synchronized horizontal extension of cylinders
ITVI20100247A1 (it) * 2010-09-13 2012-03-14 Francesco Fiorese Dispositivo per il rilevamento del reciproco dislivello dei supporti del carico nei ponti sollevatori per veicoli
US8920145B2 (en) 2010-11-29 2014-12-30 Gta Innovation, Llc Synchronized hydraulic power module
US10087958B2 (en) 2012-04-19 2018-10-02 Cascade Corporation Fluid power control system for mobile load handling equipment
CN104314907A (zh) * 2014-10-12 2015-01-28 郑州大学 一种顶管用的液压系统
CN106015159A (zh) * 2016-07-12 2016-10-12 天津优瑞纳斯液压机械有限公司 一种非等容积同步分配器液压缸
CN106015159B (zh) * 2016-07-12 2019-01-18 天津优瑞纳斯液压机械有限公司 一种非等容积同步分配器液压缸
CN109281884A (zh) * 2018-11-27 2019-01-29 中国葛洲坝集团第二工程有限公司 模板同步液压顶升控制系统

Also Published As

Publication number Publication date
GB1347758A (en) 1974-02-27
DE2129322C3 (enExample) 1973-10-11
DE2129322A1 (de) 1971-12-30
DE2129322B2 (de) 1973-03-29

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