Fascinating Rotary Screw Engine

It has come to my attention that an identical machine has already been conceptualized and patented US patent, 20030012675 A1 It seems everything has already been invented :( Models: The current screw profile is not sealed ie: some leakage can occur from one discrete air pocket to the next, and the current profile would leak. I believe there may be an air tight profile tho, as some more complicated profiles have b