Patent ID: 7725971
Filing Date: 2010-06-01
Classification: B08B,E04H

Abstract:
1. A flotation device configured to clean sidewalls of a liquid container, comprising: a float at least partially submergible with respect to a liquid level in the container, configured to contact the sidewalls of the container in response to liquid movement, and including a variable ballast to at least partially submerge the float to a predetermined level in the liquid, wherein the ballast weight includes a dissolvable cleaning agent configured to dissolve upon contact with the liquid over a predetermined period of time such that the predetermined submerged level of the float decreases as the dissolvable cleaning agent dissolves; a cover, removably disposed over the float, having a lower cleaning portion configured to clean the sidewalls of the container upon contact with the sidewalls and an upper noncleaning portion coupled to the lower cleaning portion.