The "Dean rotary valve" (Australian design) worked on a similar principal , saw a demonstation of the "rotary valve" in operation in the early seventies - the father & son team had very little money to develop their idea further , I heard that they had a meeting with "Ralph Sarich" in the early seventies and never heard anything again - the "Dean Rotary valve" was actually a drum that revolved above the cylinder head and replace all the valve gear with ports for the incoming fuel = it worked something like a "rotary valve" in early Kawasaki two stroke motorcycle engines; from memory a major problem they had was with seals or seal designs - what I saw did work and seemed like a good idea , it was attached to a late sixties six cylinder Falcon engine .
