Patent ID: 7716785

Claim:
A floor cleaning machine comprising: a brush unit configured to scrub a floor with a cleaning detergent liquid so as to remove soil and dirt from the floor; and a wiping device configured to scrape the floor to remove dirty cleaning detergent liquid therefrom, said wiping device comprising a front flap and a rear flap, said front and rear flaps configured to elastically and slidably engage the floor so as to define a suction chamber therebetween, wherein said suction chamber is fluidly connected to a suction unit, wherein said front flap includes a plurality of indentations having a predetermined cross-sectional size to convey the dirty cleaning detergent liquid into said suction chamber, wherein at least a portion of said front flap forms a tab via a rupture edge, said rupture edge being formed by a plurality of micro-perforations, and wherein said tab is removable without using tools so as to form a breach or passageway having a broader cross-sectional size in said front flap than the predetermined cross-sectional size of each of said plurality of indentations so as to reduce the speed of the air entering said suction chamber and, as a result, the related suction noise.