Air Engine

compressed air battery
http://en.wikipedia.org/wiki/Compressed_air_battery

France
http://www.youtube.com/watch?v=f4w6aJMNXSk SA obtained a production license. The engine has 20 patents to HackPatents via a fronting company in South-Africa: We will produce the engines ourselves once reverse engineered and copied.

http://en.wikipedia.org/wiki/Compressed_air_energy_storage

http://en.wikipedia.org/wiki/Pneumatic_motor