Patent ID: 7976614
Filing Date: 2011-07-12
Classification: A47L,B01D,F16K,Y10S

Abstract:
1. Method for cleaning the filters of a vacuum cleaner, the vacuum cleaner comprising a dirt collecting container, which dirt collecting container has a suction inlet and is in flow connection with at least one suction unit via at least one filter and at least one suction extraction line, and at least one external air inlet which opens into the suction extraction line downstream of the at least one filter and which can be closed by means of at least one closing valve, wherein the at least one closing valve has a valve body which is movable back and forth between a closed position and an open position and is acted upon by a closing spring with a closing force in a direction towards the valve seat, which valve body lies against a valve seat in the closed position and is at a distance from the valve seat in the open position, said method comprising: opening the at least one closing valve such that a side of the at least one filter that is oriented away from the dirt collecting container is impinged upon by external air, wherein: