Patent ID: 7874175

Claim:
An external heat engine comprising a fluid container containing a compressible fluid, a means to rotate said fluid container around a rotation axis, a means to cause a part of said fluid to flow from a first position, called position one, in the container close to the rotation axis to a second position, called position two, in the container far from the rotation axis thus causing a compression of said part of said fluid, near and far being relative to a scale having a minimum distance being the distance from the axis of a point in said container closest to the rotation axis and a maximum distance being the distance from the axis of a point in said container farthest from the rotation axis, a means located far from the rotation axis and used to heat said part of said fluid by heat exchange with an external sink while said part of said fluid travels from position two to another position, called position three, also far from the axis, a means to extract energy as said part of said fluid moves from said position three, far from the axis, to a position, called position four, close to the rotation axis, with accompanying expansion of said part of said fluid, a means located near to the rotation axis and used to remove heat from said part of said fluid by heat exchange with another external heat sink while said part of said fluid travels from position four, near to the rotation axis, to position five also near to the rotation axis.