Schauberger
pipe-walls. The patent extension for constructing these vanes is included with the patent application under separate cover. In the patent claims particular reference is made to the pipe's insulation. Details of the angular configuration, etc. of the above vanes were omitted, because they have already been included in earlier patents.[The Energy Evolution - Harnessing Free Energy from Nature, The Liquefaction of Coal by Means of Cold Flows]