US Patent 11684058 Narrow transport boom folding hinge system

A hinge system is provided for a boom of an agricultural product applicator that facilitates a compact folded boom width in a transport mode by providing a multi-directional folding, including folding with compound movement components to reorient a primarily horizontal stack of boom sections to a primarily vertical stack of the boom sections, when fully folded. The hinge system may include multiple hinge joints with pivot axes that are oriented at different angles to allow for substantially horizontal folding movements followed by a rolling-type movement(s) that reorients a generally horizontal stack of boom sections into a generally vertical stack of boom sections to decrease an overall width of the applicator when in transport mode.