发明名称 DRILL PIPE POSITIONER FOR EARTH BORING MACHINE
摘要 A drill pipe positioner that will lift, position and release a section of drill pipe in proper relation to the drill head and other elements of an earth boring machine and by reversing the action will attach to a section of drill pipe, lift and release it for removal and stacking. A first arm pivots on the support columns and a second arm unit pivots on the first arm. Grippers are attached to the second arm unit for gripping and holding a section of drill pipe.
申请公布号 US3750769(A) 申请公布日期 1973.08.07
申请号 USD3750769 申请日期 1971.10.29
申请人 DRESSER IND INC,US 发明人 YOUNG J,US;CASON G,US;KUNKEL E,US
分类号 E21B7/02;E21B7/28;E21B19/20;(IPC1-7):E21B19/00 主分类号 E21B7/02
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