Patent ID: 7069655

Claim:
A device, comprising: a body having an air intake port, an exhaust port, and a lifting point; a ballast member attached to said body having a pivot extraction point, whereby when said body and said ballast member are lifted by said lifting point, pulling on said pivot extraction point pivots said body and said ballast member; whereby when a diffuser is attached to said exhaust port, and when said ballast member, said body and said diffuser are located in a tank having a top, a floor, and a small opening in said top, said diffuser can be extracted through said small opening by: lifting on said lifting point until said ballast member, said body and said diffuser are a pivot clearance above said floor; pulling on said pivot extraction point to pivot said ballast member, said body and said diffuser until said diffuser is aligned with said small opening; and extracting said diffuser through said small opening.