US Patent 7757344 Upright vacuum cleaner

A vacuum cleaner is provided that includes a cleaner body, a multi cyclonic (including a primary cyclone and at least one secondary cyclone), a suction source having a suction source inlet and a suction source outlet, a main filter assembly including a main filter element, a discharge member having an opened upper end coupled to a peripheral edge of a primary airflow outlet and a closed lower end, and a guide rib provided at the primary cyclone for guiding the airflow in a direction tangential to an inner peripheral wall surface of the primary cyclone.