US Patent 7966690 Surface cleaning with recovery tank float control

A surface cleaning apparatus with a recovery tank that has side rails to facilitate alignment of the recovery tank with the base. The recovery tank can include a float assembly with a pivotable closure member. The recovery tank can have a lid with a handle and latch to secure the lid to the recovery tank. Further, the recovery tank can include a lid with a working air conduit mounted to the lid and removable from the recovery tank with the lid.