Patent ID: 8186005
Filing Date: 2012-05-29
Classification: A47L

Abstract:
1. Vacuum cleaning device comprising: a dirt collection container which 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 line, and at least one external air inlet which opens into the at least one suction line downstream of the at least one filter and which is adapted to be closed by means of at least one closing valve, the at least one closing valve having a movable valve body which, in a closed position, bears against at least one valve seat so as to form at least one sealing line, the at least one sealing line delimiting an area which, in the closed position of the closing valve, is acted upon by a differential pressure, wherein a square of a total length of all sealing lines is at least 25 times a total size of all areas which are delimited by the sealing lines and acted upon by differential pressure.