JPS628400B2 - - Google Patents

Info

Publication number
JPS628400B2
JPS628400B2 JP56091031A JP9103181A JPS628400B2 JP S628400 B2 JPS628400 B2 JP S628400B2 JP 56091031 A JP56091031 A JP 56091031A JP 9103181 A JP9103181 A JP 9103181A JP S628400 B2 JPS628400 B2 JP S628400B2
Authority
JP
Japan
Prior art keywords
cylinder device
boom
extension
spool
switching valve
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
JP56091031A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57209193A (en
Inventor
Toshihiro Nakajo
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 JP9103181A priority Critical patent/JPS57209193A/ja
Publication of JPS57209193A publication Critical patent/JPS57209193A/ja
Publication of JPS628400B2 publication Critical patent/JPS628400B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Jib Cranes (AREA)
JP9103181A 1981-06-12 1981-06-12 Expansion device for boom Granted JPS57209193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9103181A JPS57209193A (en) 1981-06-12 1981-06-12 Expansion device for boom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9103181A JPS57209193A (en) 1981-06-12 1981-06-12 Expansion device for boom

Publications (2)

Publication Number Publication Date
JPS57209193A JPS57209193A (en) 1982-12-22
JPS628400B2 true JPS628400B2 (pm) 1987-02-23

Family

ID=14015143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9103181A Granted JPS57209193A (en) 1981-06-12 1981-06-12 Expansion device for boom

Country Status (1)

Country Link
JP (1) JPS57209193A (pm)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563320A (en) * 1979-06-19 1981-01-14 Hikari Seikou Kk Uniform speed universal joint

Also Published As

Publication number Publication date
JPS57209193A (en) 1982-12-22

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