Patent ID: 6702868
Filing Date: 2004-03-09
Classification: A47L,B01D,B07B

Abstract:
A grill assembly of a cyclone dust-collecting apparatus for a vacuum cleaner, disposed at an inlet of an air-discharging passage of a cyclone body that generates a whirling air current from air drawn therein and separates filth from the air by centrifugal force of the whirling air current, the grill assembly comprising:a body; and a plurality of longitudinal passages formed in the body, each passage defined by adjacent blades, wherein the radial projection of a blade overlaps about 10% to about 50% of an adjacent blade surface area, wherein the blade overlap is determined when the blades are projected onto an imaginary cylinder coaxial with the blades; and wherein an extended centerline of the passages forms an acute angle with a streamline of the whirling air current.