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.)
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IHI Corp
Original Assignee
IHI Corp
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Publication date
Application filed by IHI CorpfiledCriticalIHI Corp
Priority to JP2468177ApriorityCriticalpatent/JPS53109361A/en
Publication of JPS53109361ApublicationCriticalpatent/JPS53109361A/en
PURPOSE: To provide a boom derrick crane which can retain large angles of a boom and a topping rope with respect to the large swinging angle of the boom by relatively short spin beam and span link.