US Patent 8701939 Food dispensing machine

A food dispensing machine includes a product chamber with a dispensing valve connected to the product chamber and having an outlet through which a product contained in the product chamber is dispensed. The product chamber has a cleaning solution inlet connectable to a cleaning solution supply source for receiving cleaning solution into the product chamber. The product chamber further has an ingredient inlet alternatively connectable to either an ingredient supply source or the dispensing valve outlet. When the ingredient inlet is connected to the dispensing valve outlet, a re-circulating flow path is created, allowing for complete cleaning and sanitizing of the product flow path.