发明名称 POWER TONG WITH INTERCHANGEABLE JAWS
摘要 A power tong that is adaptable to smaller sues by installing an auxiliary camming assembly against the principle camming surface within the rotary. This auxiliary camming assembly preferably is seated within the neutral recess on the principle camming surface. An auxiliary cage plate carries auxiliary jaw sets.
申请公布号 CA2089902(A1) 申请公布日期 1994.08.20
申请号 CA19932089902 申请日期 1993.02.19
申请人 DLASK, GEORGE 发明人 DLASK, GEORGE
分类号 E21B19/16;(IPC1-7):B25B13/50 主分类号 E21B19/16
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