Patent ID: 7335241

Claim:
A cyclone vessel dust collector comprising: a cyclone vessel main-body including a primary cyclone vessel unit for separating dusts from drawn in air, the primary cyclone vessel having an outer circumference, the cyclone vessel main body having a first wall having a first radius such that the first wall surrounds the outer circumference of the primary cyclone vessel, the cyclone vessel main body further having a second wall having a second radius that is greater than the first radius such that the second wall surrounds the first wall and defines a chamber between the first wall and second wall wherein there are three or more secondary cyclone vessel units for separating dusts from air passing through the primary cyclone vessel unit, the secondary cyclone vessel units being around the outer circumference of the primary cyclone vessel; and a dirt collection bin for receiving dust separated from drawn-in air, wherein the cyclone main body has an outer circumference with a non-constant radius.