Hoist mechanism locking assembly

A hoist mechanism, comprising:

• a mounting structure;
• a frame comprising a first end and a second end, the frame pivotably coupled with the mounting structure at the frame first end;
• a hoist arm assembly, the hoist arm assembly comprising a sleeve pivotably coupled with the frame second end and a jib coupled with the sleeve, the jib operative to move between an extended position and a retracted position with respect to the sleeve;
• and
• a locking assembly operative to move between an unlocked position, wherein the hoist arm assembly is pivotable with respect to the frame about the pivotal connection between the frame second end and the hoist arm assembly, and a locked position, wherein the frame and the hoist arm assembly are releasably coupled for unitary pivotal movement about the pivotal connection between the frame first end and the mounting structure, the locking assembly comprising:
• a lug disposed on the jib of the hoist arm assembly, the lug operative to move with the jib between the extended and retracted positions;
• and
• a link arm coupled with the frame, the link arm defining a first slot operative to engage with the lug when the jib is moved from the retracted position.