Patent ID: 8863353

Claim:
A floor cleaning apparatus, comprising: a body including a suction inlet and an exhaust outlet; a dirt cup assembly carried on said body, said dirt cup assembly including a primary cyclone, a plurality of secondary cyclones and an airflow path between said primary cyclone and said plurality of secondary cyclones; and a suction generator carried on said body, said suction generator moving an airstream through said suction inlet, said airflow path of said dirt cup assembly and said exhaust outlet; said airflow path being characterized by a primary air guide including an airflow surface extending from a first end to a second end, said first end including a first opening having a first surface area (A 1 ) and said second end including a second opening having a second surface area (A 2 ) where (A 1 >A 2 ), said first end further including an edge having a series of scallops.