发明名称 INTERLOCKING JAW POWER TONGS
摘要 The present invention provides an improved power tong a body having with a rotating assembly. The power tong further has a plurality of jaw members positioned within the rotating assembly with two of the jaw members being pivoting jaws adapted to interlock when in a closed position. In an alternate embodiment, the improved power tong will have a compensating jaw assemble to limit the axial load placed on the tubular member being gripped.
申请公布号 EP0939687(A1) 申请公布日期 1999.09.08
申请号 EP19970912770 申请日期 1997.10.10
申请人 BUCK, DAVID A. 发明人 BUCK, DAVID A.
分类号 B25B13/50;E21B19/16 主分类号 B25B13/50
代理机构 代理人
主权项
地址