US Patent 9284947, RESPONSIVE WINDMILL, windtrees, wind tree, vertical axis windmill, VAWT, future windmill, wind mill, wind turbine

Windtrees.com Inventions, Rotary machine, RESPONSIVE VAWT windmill, …

Rolling Piston Rotary Engine


US Patent 9638186, Rotary Pump and Rotary Motor
US Patent Application 15670071, Full Cycle Rotary Engine Combination Undisclosed information available on request.


A breakthrough for a simpler, less costly and more efficient straight-shaft rotary engine to replace conventional crank-shaft reciprocating engine.

  • This is not fiction about Wankel's invention, nor Mazda's pursue. Neither LiquidPiston's current design!
  • James Watt's 230 years old dream becomes true.
  • Technical problems such as friction and dynamic sealing etc. have been solved finally in a simple and effective way with every reason and potential to outperform piston-crankshaft engines.

US Patent Application 15670071: Full Cycle Rotary Engine Combination
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