US Patent 10006213 Swimming pool skimmer attachment

A pool skimming system for removing debris from a pool water surface comprising a pool water skimmer; a stationary back plate removably connected to the pool water skimmer, the back plate comprising a front, a back, and an aperture; and a vertically mobile, buoyant front module comprising a rear slot disposed vertically, an aperture and a weir, the front module being slideably connected to the front of the back plate by connecting means at the vertical rear slot, wherein the front module moves up and down with the level of water in the pool to maintain a substantially constant position of the weir relative to the pool water surface.