The Rotodyne is a rotary high efficiency internal combustion engine invented by me.

US Utility Patent # 7,210,429

 

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=7&f=G&l=50&co1=AND&d=PTXT&s1=johns.INNM.&s2=engine.TI.&OS=IN/johns+AND+TTL/engine&RS=IN/johns+AND+TTL/engine

And a follow up US patent filed under my patent attorney/son in law and me

US Utility Patent# 7,667, 210 B2

http://pdfpiw.uspto.gov/.piw?Docid=07677210&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO2%2526Sect2%3DHITOFF%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsearch-bool.html%2526r%3D1%2526f%3DG%2526l%3D50%2526co1%3DAND%2526d%3DP

The computer generated images above were drawn by me on a CAD program called SOLIDWORKS. All parts move in the model and are synchronized so the pistons move up and down in the cylinders and the valves open and close at the proper intervals. The engine has been through about ten major revisions and a few patent revisions to arrive at the two consolidated patents mentioned above.