Patent ID: 8914939

Claim:
A vacuum cleaner comprising: a tank having an internal chamber and a first wall dividing the internal chamber of into a first compartment and a second compartment separated by the wall; a discharge adapted and configured to discharge waste material vacuumed by the vacuum cleaner into the first compartment of the tank; the first wall comprising one or more openings extending through the first wall and fluidly communicating the first and second chambers whereby waste material received into the first compartment that can pass through the one or more openings can pass from the first compartment into the second compartment while waste material that cannot pass through the one or more openings remains in the first compartment; and wherein the tank comprises first and second members not integral with one another, each member having a bottom and an annular wall extending away from the bottom, the first member nested in the second member with the bottom of the first member at least partially forming said first wall.