US Patent 7334645 Articulated power transfer apparatus

A hitch apparatus for connection between a tractor and a trailing implement such as a cutter includes a hitch arm at one end of the apparatus extending forwardly and pivotal so as to extend either inwardly or outwardly thus offsetting the apparatus across the rear of the tractor. The apparatus includes the draw bar hitch at the rear spaced across from the hitch arm for attachment to the cutter so that the cutter is offset to one side of the tractor. Two gear boxes and a drive shaft provide connection from the PTO of the tractor to the drive input of the cutter. The offset hitch apparatus allows the cutter to run in a ditch while the tractor remains on level ground.