Motor brush dust removing filter for use in vacuum cleaner

In a vacuum cleaner which includes a cylindrical canister defining an inner space therein, a supporting member having wheels and being connected to a lower portion of the cylindrical canister, a cover engaged to an upper portion of the cylindrical canister, an air outlet installed in the cover for discharging air from the upper portion of the canister, and vacuum generating means including an electrical motor for sucking air from the inner space of the canister, an improved motor brush dust removing filter unit wherein the cover includes, at a center portion thereof, a circular aperture and a circular protrusion formed along said aperture, the vacuum generating means including a motor brush assembly which produces dust during operation of the vacuum generating means, the vacuum generating means further including a case for the motor brush assembly, the motor brush dust removing filter unit having a connection portion inserted into the aperture so that the filter unit rests on the protrusion, the connection portion of the filter unit being connected to the case of the motor brush assembly, the brush dust from the motor brush assembly being vented through an air vent formed in an upper surface of the case of the motor brush assembly and filtered by a filter of the filter unit prior to being exhausted to the outside, for thereby discharging air through the cover and directly and easily exhausting the heat generated by the electrical motor to the outside, so that the upper portion of the vacuum cleaner can be prevented from being over-heated and implementing an effective cooling of the brush assembly and a complete blocking of the brush dust.