US Patent 8726451 Surface cleaning tools having end caps

An end cap having a longitudinal axis is provided. The end cap includes a stationary portion, a movable portion, and a clamping member. The movable portion has a cam surface and the clamping member has a free end. The movable and stationary portions are interconnected so that the movable portion moves between a locked position and an unlocked position. The cam surface influences the clamping member when the movable portion is in the locked position such that the cam surface resiliently flexes the clamping member to move the free end at least perpendicular to the longitudinal axis.