US Patent 9243414 Swimming pool cleaning device

The swimming pool cleaner of the invention is a suction device comprising a rectangular housing, at least four wheels enabling the device to be manually rolled along the swimming pool bottom with the long sides perpendicular to the direction of motion, and two cylindrical rotary brushes adjacent and parallel to opposing long sides of the housing and driven by rotation of the device wheels. Tree leaves and other debris are effectively captured due to a downward sweeping action produced by rotation of the cylindrical rotary brush on the leading edge as the cleaning device, connected to a suction means, is rolled back and forth over the swimming pool bottom by an operator pulling and pushing on a pole attached to the top of the housing. The performance of the device is enhanced via fenders that wrap around the tops of the rotary brushes, and inclusion of various housing bottom features.