发明名称 Portable hydraulic master ratchet
摘要 A manually actuated hydraulic cylinder with a retractable piston for varying the distance between two cables secured to a barge attachment ring on the end of the cylinder and a pelican hook and keeper disposed on the end of the piston as used in the marine industry for coupling barges.
申请公布号 US7536970(B1) 申请公布日期 2009.05.26
申请号 US20070938631 申请日期 2007.11.12
申请人 MCCOY PATRICK M;HILLER III WILLIAM H 发明人 MCCOY PATRICK M;HILLER, III WILLIAM H
分类号 B63B21/04 主分类号 B63B21/04
代理机构 代理人
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