Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US06/481,152 Inventor Hachiro Inoue Original Assignee Hachiro Inoue Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Method of excavating an under-reamed pile boreĭownload PDF Info Publication number US4488606A US4488606A US06/481,152 US48115283A US4488606A US 4488606 A US4488606 A US 4488606A US 48115283 A US48115283 A US 48115283A US 4488606 A US4488606 A US 4488606A Authority US United States Prior art keywords bore under reamed bits pile bore Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4488606A - Method of excavating an under-reamed pile bore US4488606A - Method of excavating an under-reamed pile bore
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