JPS5213245A - Retractile hydraulic boom for portable crane - Google Patents

Retractile hydraulic boom for portable crane

Info

Publication number
JPS5213245A
JPS5213245A JP8979675A JP8979675A JPS5213245A JP S5213245 A JPS5213245 A JP S5213245A JP 8979675 A JP8979675 A JP 8979675A JP 8979675 A JP8979675 A JP 8979675A JP S5213245 A JPS5213245 A JP S5213245A
Authority
JP
Japan
Prior art keywords
retractile
hydraulic boom
boom
portable crane
load
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
JP8979675A
Other languages
Japanese (ja)
Other versions
JPS5818314B2 (en
Inventor
Masatoshi Shinohara
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 JP50089796A priority Critical patent/JPS5818314B2/en
Publication of JPS5213245A publication Critical patent/JPS5213245A/en
Publication of JPS5818314B2 publication Critical patent/JPS5818314B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Jib Cranes (AREA)

Abstract

PURPOSE: To render the buckle resistance of a piston rod maximum upon application of a load by supporting a hydraulic cylinder at three positions so that the axial line of a retractile boom describes a curve projecting downward when no deflection is caused in the boom to which a load is applied.
COPYRIGHT: (C)1977,JPO&Japio
JP50089796A 1975-07-22 1975-07-22 The new crane boom Expired JPS5818314B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50089796A JPS5818314B2 (en) 1975-07-22 1975-07-22 The new crane boom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50089796A JPS5818314B2 (en) 1975-07-22 1975-07-22 The new crane boom

Publications (2)

Publication Number Publication Date
JPS5213245A true JPS5213245A (en) 1977-02-01
JPS5818314B2 JPS5818314B2 (en) 1983-04-12

Family

ID=13980653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50089796A Expired JPS5818314B2 (en) 1975-07-22 1975-07-22 The new crane boom

Country Status (1)

Country Link
JP (1) JPS5818314B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484621A (en) * 1977-12-16 1979-07-05 Aisin Seiki Negative pressure control valve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852269U (en) * 1971-10-18 1973-07-06

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852269U (en) * 1971-10-18 1973-07-06

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484621A (en) * 1977-12-16 1979-07-05 Aisin Seiki Negative pressure control valve
JPS6220377B2 (en) * 1977-12-16 1987-05-07 Aisin Seiki

Also Published As

Publication number Publication date
JPS5818314B2 (en) 1983-04-12

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