JPS6131717B2 - - Google Patents

Info

Publication number
JPS6131717B2
JPS6131717B2 JP3146180A JP3146180A JPS6131717B2 JP S6131717 B2 JPS6131717 B2 JP S6131717B2 JP 3146180 A JP3146180 A JP 3146180A JP 3146180 A JP3146180 A JP 3146180A JP S6131717 B2 JPS6131717 B2 JP S6131717B2
Authority
JP
Japan
Prior art keywords
oil
boom
pilot
cylinder device
oil 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.)
Expired
Application number
JP3146180A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56127595A (en
Inventor
Susumu Nakamura
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.)
Furukawa Unic Corp
Original Assignee
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 Unic Corp filed Critical Unic Corp
Priority to JP3146180A priority Critical patent/JPS56127595A/ja
Publication of JPS56127595A publication Critical patent/JPS56127595A/ja
Publication of JPS6131717B2 publication Critical patent/JPS6131717B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Jib Cranes (AREA)
JP3146180A 1980-03-11 1980-03-11 Expansion device for three stage boom Granted JPS56127595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3146180A JPS56127595A (en) 1980-03-11 1980-03-11 Expansion device for three stage boom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3146180A JPS56127595A (en) 1980-03-11 1980-03-11 Expansion device for three stage boom

Publications (2)

Publication Number Publication Date
JPS56127595A JPS56127595A (en) 1981-10-06
JPS6131717B2 true JPS6131717B2 (enrdf_load_stackoverflow) 1986-07-22

Family

ID=12331895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3146180A Granted JPS56127595A (en) 1980-03-11 1980-03-11 Expansion device for three stage boom

Country Status (1)

Country Link
JP (1) JPS56127595A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS56127595A (en) 1981-10-06

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