JPS57184709A - Multiple hydraulic cylinder device - Google Patents

Multiple hydraulic cylinder device

Info

Publication number
JPS57184709A
JPS57184709A JP6992481A JP6992481A JPS57184709A JP S57184709 A JPS57184709 A JP S57184709A JP 6992481 A JP6992481 A JP 6992481A JP 6992481 A JP6992481 A JP 6992481A JP S57184709 A JPS57184709 A JP S57184709A
Authority
JP
Japan
Prior art keywords
fluid
cylinder assembly
fluid chamber
contraction
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6992481A
Other languages
Japanese (ja)
Other versions
JPS62366B2 (en
Inventor
Kenji Ichimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YUNITSUKU KK
Furukawa Unic Corp
Original Assignee
YUNITSUKU KK
Unic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YUNITSUKU KK, Unic Corp filed Critical YUNITSUKU KK
Priority to JP6992481A priority Critical patent/JPS57184709A/en
Publication of JPS57184709A publication Critical patent/JPS57184709A/en
Publication of JPS62366B2 publication Critical patent/JPS62366B2/ja
Granted legal-status Critical Current

Links

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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type

Abstract

PURPOSE:To prevent lack of fluid in an intermediate fluid chamber by providing a valve midway in a fluid line between a hermetically sealed fluid chamber of the 1st cylinder assembly in order to adjust fluid volume in the hermetically sealed fluid chamber at respective ends of extension and contraction of the 1st cylinder assembly. CONSTITUTION:Switching of a directional control valve 17 for delivery of pressurized fluid on the side of a port 13 causes the pressurized fluid to flow through a fluid line 21, a fluid passage inside an inner pipe 23 and the 1st extension fluid chamber 8 so that the 1st cylinder assembly can start extending. Then, fluid in the 1st contraction fluid chamber 9 of the 1st cylinder assembly flows into the 2nd extension fluid chamber 10 of the 2nd cylinder assembly through a port 12 so that the 2nd cylinder assembly also starts extending. Namely, the 1st and 2nd cylinder assemblies can start extending simultaneously. At this time, fluid in the 2nd contraction fluid chamber 11 of the 2nd cylinder assembly returns back to the reservoir 19 through a port 24 and a fluid line 22.
JP6992481A 1981-05-08 1981-05-08 Multiple hydraulic cylinder device Granted JPS57184709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6992481A JPS57184709A (en) 1981-05-08 1981-05-08 Multiple hydraulic cylinder device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6992481A JPS57184709A (en) 1981-05-08 1981-05-08 Multiple hydraulic cylinder device

Publications (2)

Publication Number Publication Date
JPS57184709A true JPS57184709A (en) 1982-11-13
JPS62366B2 JPS62366B2 (en) 1987-01-07

Family

ID=13416718

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6992481A Granted JPS57184709A (en) 1981-05-08 1981-05-08 Multiple hydraulic cylinder device

Country Status (1)

Country Link
JP (1) JPS57184709A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823225A1 (en) * 1988-07-08 1990-01-11 Montan Hydraulik Gmbh & Co Kg Multi-stage hydraulic telescopic cylinder with positive control for the extension and retraction sequence of the telescopic members
KR100597531B1 (en) * 1998-04-06 2006-07-10 그로우브 유.에스. 엘.엘.씨. Telescoping system with multi-stage telescopic cylinder
WO2019193259A1 (en) * 2018-04-06 2019-10-10 Tmk Energiakoura Oy Hydraulic actuator, working device, and energy-wood grapple

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103671343B (en) * 2013-12-10 2016-08-10 中联重科股份有限公司 Oil cylinder
CN103867524B (en) * 2014-03-26 2015-12-09 中国建筑科学研究院建筑机械化研究分院 A kind of double-action two-stage hydraulic cylinder

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4841194A (en) * 1971-09-28 1973-06-16
JPS5362077A (en) * 1976-11-17 1978-06-03 Unic Corp Triple stage cylinder device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4841194A (en) * 1971-09-28 1973-06-16
JPS5362077A (en) * 1976-11-17 1978-06-03 Unic Corp Triple stage cylinder device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823225A1 (en) * 1988-07-08 1990-01-11 Montan Hydraulik Gmbh & Co Kg Multi-stage hydraulic telescopic cylinder with positive control for the extension and retraction sequence of the telescopic members
KR100597531B1 (en) * 1998-04-06 2006-07-10 그로우브 유.에스. 엘.엘.씨. Telescoping system with multi-stage telescopic cylinder
WO2019193259A1 (en) * 2018-04-06 2019-10-10 Tmk Energiakoura Oy Hydraulic actuator, working device, and energy-wood grapple

Also Published As

Publication number Publication date
JPS62366B2 (en) 1987-01-07

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