A flat pump for producing liquid spray or for producing an atomized liquid stream may have a thickness of 6 millimeters or less. The flat pump may include an internal reservoir, a valve, a valve conduit and a vortex chamber wherein fluid from the reservoir may be pumped through the valve, along the valve...http://www.google.es/patents/US8152077?utm_source=gb-gplus-sharePatente US8152077 - Flat atomizer pump
