US Patent 9161673 Wringer for a bucket

The disclosed wringer for a bucket includes flexible wall members for squeezing around a strip mop. Each wall member has an outer portion, an inner portion, and a transition zone between the outer portion and inner portion and each wall member having an upper face and an under face that is facing the container. On at least one of the wall members at the under face is a least one outwardly projecting rib extending through the transition zone.