JPS5425046A - Horizontal luffing crane - Google Patents

Horizontal luffing crane

Info

Publication number
JPS5425046A
JPS5425046A JP8742977A JP8742977A JPS5425046A JP S5425046 A JPS5425046 A JP S5425046A JP 8742977 A JP8742977 A JP 8742977A JP 8742977 A JP8742977 A JP 8742977A JP S5425046 A JPS5425046 A JP S5425046A
Authority
JP
Japan
Prior art keywords
luffing crane
horizontal luffing
cylinder
hydraulic
horizontal
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.)
Pending
Application number
JP8742977A
Other languages
Japanese (ja)
Inventor
Toshiaki Makino
Kenjiro Kasai
Hiromi Go
Kiyoshi Gomi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8742977A priority Critical patent/JPS5425046A/en
Publication of JPS5425046A publication Critical patent/JPS5425046A/en
Pending legal-status Critical Current

Links

Landscapes

  • Jib Cranes (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To improve the efficiency of a hydraulic circuit of a horizontally luffing crane by providing electrohydraulically controlling means for adjusting hydraulic oil amount to a hydraulic cylinder to adjust the supply amount of the oil in response to the telescoping position of the cylinder.
COPYRIGHT: (C)1979,JPO&Japio
JP8742977A 1977-07-22 1977-07-22 Horizontal luffing crane Pending JPS5425046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8742977A JPS5425046A (en) 1977-07-22 1977-07-22 Horizontal luffing crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8742977A JPS5425046A (en) 1977-07-22 1977-07-22 Horizontal luffing crane

Publications (1)

Publication Number Publication Date
JPS5425046A true JPS5425046A (en) 1979-02-24

Family

ID=13914615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8742977A Pending JPS5425046A (en) 1977-07-22 1977-07-22 Horizontal luffing crane

Country Status (1)

Country Link
JP (1) JPS5425046A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5872691A (en) * 1981-10-26 1983-04-30 Mizuho Ika Kogyo Kk Selector valve
CN102502434A (en) * 2011-10-21 2012-06-20 四川宏华石油设备有限公司 Luffing hydraulic controlling system of joint lift

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5872691A (en) * 1981-10-26 1983-04-30 Mizuho Ika Kogyo Kk Selector valve
CN102502434A (en) * 2011-10-21 2012-06-20 四川宏华石油设备有限公司 Luffing hydraulic controlling system of joint lift

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