发明名称 Extraction tool lifting system
摘要 An extraction tool lifting apparatus having a load bearing coupling capable of being removably connected to an extraction tool; an hydraulic cylinder assembly being operatively connected at a first end to the load bearing coupling; a mounting bracket being operatively connected to the second end of the hydraulic cylinder assembly; three legs, each operatively connected at a first end to the mounting bracket; the load bearing coupling being adapted to be removably connected to an extraction tool having, an elongated base member having first and second ends, and a drill bit being removably attachable to a socket in the first end, the base member having a threaded portion being disposed approximate the first end, the second end being adapted to be removably connected to the load bearing coupling.
申请公布号 US8522412(B1) 申请公布日期 2013.09.03
申请号 US20100818107 申请日期 2010.06.17
申请人 WALKER WILLIAM A.;LINE WALKER, LLC 发明人 WALKER WILLIAM A.
分类号 B66F3/00;B66F19/00 主分类号 B66F3/00
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