A wheeled cart for facilitating the transportation and delivery of a load of material including an elongated frame having a pair of drive wheels mounted to the forward end of the frame and a pair of caster wheels operatively engaged with and supporting the rear end of the frame. A hopper attached to...http://www.google.de/patents/US5284218?utm_source=gb-gplus-sharePatent US5284218 - Motorized cart with front wheel drive
