Patent ID: 7959348

Claim:
A canister assembly for storing viscous fluids, the canister assembly comprising: an annular housing comprising an outer cylindrical wall, a bottom and an inner standpipe, the bottom comprising an outlet, the bottom connecting the outer cylindrical wall to the inner standpipe, an annular screen element that slides over the standpipe, the annular screen element comprising a cylindrical outer shell that slides inside the outer cylindrical wall of the annular housing, the cylindrical outer shell having an upper end and a lower end, the annular screen element further comprising an annular screen disposed horizontally within the cylindrical outer shell and spaced above the lower end thereof, the lower end of the outer cylindrical shell supporting the annular screen element above the bottom of the annular housing and the outlet, a hollow agitator shaft that slides over the standpipe above the annular screen element, the canister further comprising a lower blade element that slides over the standpipe and is positioned below the annular screen element, the lower blade element and hollow agitator shaft being connected together with the annular screen element sandwiched therebetween.