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JPS5383255A - Device for telescopically extending and retracting three stage telescopic boom - Google Patents

Device for telescopically extending and retracting three stage telescopic boom

Info

Publication number
JPS5383255A
JPS5383255A JP16042676A JP16042676A JPS5383255A JP S5383255 A JPS5383255 A JP S5383255A JP 16042676 A JP16042676 A JP 16042676A JP 16042676 A JP16042676 A JP 16042676A JP S5383255 A JPS5383255 A JP S5383255A
Authority
JP
Japan
Prior art keywords
telescopic boom
stage telescopic
retracting
boom
telescopically extending
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
JP16042676A
Other languages
Japanese (ja)
Other versions
JPS6017758B2 (en
Inventor
Jiro Fukui
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.)
Tadano Ltd
Original Assignee
Tadano Iron Works Co 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 Tadano Iron Works Co Ltd filed Critical Tadano Iron Works Co Ltd
Priority to JP51160426A priority Critical patent/JPS6017758B2/en
Publication of JPS5383255A publication Critical patent/JPS5383255A/en
Publication of JPS6017758B2 publication Critical patent/JPS6017758B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Jib Cranes (AREA)

Abstract

PURPOSE: To enable exceedingly smoothly transfer from the step of extending the intermediate boom of three stage telescopic boom to the step of extending the top boom thereof upon extension of the three stage telescopic boom and from the step step of retractin the top boom to the step of retracting the intermediate boom of the three stage telescopic boom upon retraction of the three stage telescopic boom in a device for telescopically extending and retracting the telescopic boom.
COPYRIGHT: (C)1978,JPO&Japio
JP51160426A 1976-12-28 1976-12-28 Control device for hydraulic cylinder for boom extension and contraction Expired JPS6017758B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP51160426A JPS6017758B2 (en) 1976-12-28 1976-12-28 Control device for hydraulic cylinder for boom extension and contraction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51160426A JPS6017758B2 (en) 1976-12-28 1976-12-28 Control device for hydraulic cylinder for boom extension and contraction

Publications (2)

Publication Number Publication Date
JPS5383255A true JPS5383255A (en) 1978-07-22
JPS6017758B2 JPS6017758B2 (en) 1985-05-07

Family

ID=15714661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51160426A Expired JPS6017758B2 (en) 1976-12-28 1976-12-28 Control device for hydraulic cylinder for boom extension and contraction

Country Status (1)

Country Link
JP (1) JPS6017758B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61185437U (en) * 1985-05-10 1986-11-19
JPH077569U (en) * 1993-07-05 1995-02-03 博明 青山 Bed sheets for futons and mats

Also Published As

Publication number Publication date
JPS6017758B2 (en) 1985-05-07

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