An air barrier or skirt apparatus for a surface treating machine having a brush chamber and a rotatable brush substantially disposed within the brush chamber. The air barrier or skirt apparatus is disposed adjacent either end of the rotatable brush and extend from the brush chamber to a surface to be...http://www.google.fr/patents/US6507968?utm_source=gb-gplus-shareBrevet US6507968 - Side skirt for a surface treating apparatus
