Boat trailer mounted bow entry ladder

作者: Mark Ebbenga , Amy Lee , Daniel Lin

DOI:

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摘要: In an first aspect, a ladder for mounting on vehicle trailer includes attachment bracket assembly the trailer; side rail; second rail parallel to and plurality of rungs pivotally connected both rails. The is collapsible decrease distance between bracket; connecting rails; pivotal connection. rails define plane connection allows rotation about vertical axis. disposed rail.

参考文章(21)
Ivan S. Haslam, Boat bow ladder assembly ,(1977)
Albert F. Friedrich, Boat bow boarding platform ,(1992)
Jr. Zach McClendon, Collapsible retriever ladder ,(1999)
George R Tombarello, Boat bow access ladder for trailer ,(2003)
Mark Ebbenga, Rope tensioner for winch ,(2008)