US Patent 9425671 Low-speed towed power generating apparatus

A low-speed towed power generating apparatus may include a mobile base comprising a platform and an axle with a pair of wheels and a differential gear set and a pair of axle shafts extending from the differential gear set and having a said wheel mounted on each of the axle shafts such that rotation of the wheels rotates the shafts and the differential gear set. The axle may include an output pulley mounted on the differential gear set. A generator assembly on the mobile base may comprise an electrical generator having an input shaft with an input pulley mounted on the input shaft, a drive belt being mounted on the input pulley and the output pulley, and a power output circuit electrically connected to the generator. A battery may be electrically connected to the generator for receiving power from the power output circuit of the generator assembly.