US Patent 8038500 Bubble generating assembly

A bubble generating assembly has a housing having a motor, an air generator and a bubble producing device associated therewith. The assembly also includes a source of bubble solution, and a pump system provided inside the housing that draws bubble solution from the source to the bubble producing device. The bubble producing device includes a tubular member having an inner surface and an outer surface, and oriented so that air from the air generator will flow along both the inner and outer surfaces, and where bubble solution coats both the inner and outer surfaces.