US Patent 8089168 Tire actuated generator for use on cars

A tire actuated generator for use on a car has a pair of wheels making contact with the rear tire. One wheel from the pair of wheels is at the leading side of the tire. One wheel from the pair of wheels is at the trailing side of the tire. Each of the wheels is directly connected to a generator. In a preferred embodiment, each of the wheels are also frictionally coupled to an other wheel, the other wheel being connected to a generator.