Patent ID: 7178324

Claim:
An external combustion engine comprising a compressor assembly a heater assembly, an expander assembly, a cooler assembly, and auxiliary systems wherein said compressor assembly having a plurality of compressor cylinders, said cooler assembly having a condenser and a working fluid storage tank. said heater assembly having a plurality of heater sub-assemblies, said heater sub-assemblies serially aligned, boundary of neighboring heater sub-assemblies being separated by a divider port assembly equipped with one-directional valves, said heater sub-assembly having plurality of heating chambers, said expander assembly having a plurality of expander cylinders, said compressor assembly having a driveshaft, said expander assembly having a driveshaft, and inlet port control means, said driveshaft of said expander assembly is extension of said driveshaft of said compressor assembly, said compressor assembly, said heater assembly, and said expander assembly are housed in same engine housing, said heater assembly is sandwiched by said compressor assembly and said expander assembly, said external combustion engine using working fluid, and said working fluid travels from said working fluid storage tank to said compressor cylinder, then to said heating chambers of said serially arranged heater sub-assemblies, then to said exnander chamber, then to said condenser, and then hack to said working fluid storage tank.