ウェスティングハウス・エア・ブレーキ
In 1953, LeTourneau sold his entire earthmoving equipment line to the Westinghouse Air Brake Company. He then applied his ingenuity to the development of the electric wheel drive concept. In 1958, at the age of seventy, LeTourneau re-entered the earthmoving equipment manufacturing business, offering contractors a range of high capacity earthmoving, transportation, and material handling machines based on the revolutionary electric wheel drive system he had developed. An electric wheel drive is also called an electric Wheel hub motor.