Patent ID: 8533903

Claim:
A floor cleaning apparatus, comprising: a housing including a nozzle assembly and a canister assembly, said nozzle assembly including a suction inlet; a suction generator carried on said housing; and a dirt collection assembly carried on said housing; said dirt collection assembly including: (a) a dirt cup having a substantially cylindrical sidewall and a bottom wall defining a primary dirt collection chamber as well as a tangentially directed airstream inlet; (b) a shroud concentrically received within said sidewall in said dirt collection chamber, said shroud including an airstream outlet and an air flow guide between said airstream outlet and said bottom wall, said air flow guide projecting outwardly toward said cylindrical sidewall; and (c) at least one rib projecting out of a channel from a lower surface of said airflow guide only partially toward said bottom wall so as to provide an open space between a lowermost surface of said at least one rib and said bottom wall, said at least one rib being positioned so as to reduce air turbulence in said dirt collection chamber between said air flow guide and said bottom wall.