发明名称 LIFTING TOOL FOR OPPOSING TWISTING OF GENERALLY SUBMERGED ROPES
摘要 A lifting tool for opposing twisting of generally submerged ropes. The lifting tool includes a body with a center axis, an operable lock configured to selectively limit movement of a rope connector through the body, and a structure coupled to the body and configured to couple to a hoist or crane. The lifting tool also includes at least one rudder positioned at a radial distance from the center axis to oppose rotation of the lifting tool.
申请公布号 US2013241221(A1) 申请公布日期 2013.09.19
申请号 US201113883169 申请日期 2011.11.02
申请人 BOROY YNGVAR;NATIONAL OILWELL VARCO NORWAY AS 发明人 BOROY YNGVAR
分类号 B66C13/04 主分类号 B66C13/04
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