A dirt collecting system for a vacuum cleaner includes a dirt cup having a dirt collecting chamber. The dirt cup is removably inserted into the housing of a vacuum cleaner. When the dirt cup is inserted into the housing, the dirt cup is fluidly connected to the suction nozzle and a suction source. The...http://www.google.de/patents/US6615444?utm_source=gb-gplus-sharePatent US6615444 - Dirt collection system for a vacuum cleaner
