Patent ID: 8657905

Claim:
A cyclonic separation apparatus for a vacuum cleaner, the cyclonic separation apparatus comprising: a cyclone with a hollow generally cylindrical body, a hollow generally frustro-conical body tapering away from the cylindrical body and a longitudinal central axis through the cylindrical body and the frustro-conical body; a discharge nozzle through the frustro-conical body at a longitudinal end of the cyclone; an air inlet port through a side of the cylindrical body, wherein the air inlet port is arranged tangentially to the cylindrical body; and an air outlet port through the cylindrical body at an opposite longitudinal end of the cyclone; a dirt container in communication with the cyclone; a deflector fin arranged within the cyclone to deflect, in use, air flow from the air inlet port in a helical path around the cyclone and towards the discharge nozzle; a vortex finder, wherein the air outlet port is through the vortex finder and wherein the deflector fin protrudes from the vortex finder; and wherein the deflector fin has a tapering profile arranged substantially transverse to the path of air flow from the air inlet port and wherein an apex of the deflector fin is arranged near or at said opposite longitudinal end of the cyclone and a sloping side of the deflector fin tapers radially inward from the apex towards said longitudinal end of the cyclone.