发明名称 Retractable towing shackle
摘要 A method and apparatus for towing an offshore structure which is protected from damage caused by ice impinging on the walls of the structure when the apparatus is not in use by positioning a retractable towing shackle within a recess in an outer wall of the structure.
申请公布号 US4788927(A) 申请公布日期 1988.12.06
申请号 US19880150470 申请日期 1988.01.29
申请人 SHELL WESTERN E&P, INC. 发明人 CASEY, JAMES M.
分类号 B63B21/56;(IPC1-7):B63B21/20 主分类号 B63B21/56
代理机构 代理人
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