Invention Grant
US3977690A Trailer, particularly for transporting and launching boats 失效
拖车,特别是运输和发射船

Trailer, particularly for transporting and launching boats
Abstract:
A trailer is formed of a core with upper sloping surfaces having protruding bosses engageable by angled protrusions from load-bearing arms. The core is placed between the trailer wheels, which are preferably wider than they are high. The arm protrusions can be turned to engage the bosses in different ways to produce different load-bearing configurations.
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