Patent ID: 7933506

Claim:
A heat storage device serving as a boiler for use in a heat engine designed to power land vehicles, boats, and lawn mowers, comprising: a.) a fully enclosed reservoir possessing an insulation means, b.) a heat storage medium consisting of mostly aluminum, alumina or magnesium by weight and supplemented with any element or compound possessing a combination of the following properties at standard conditions: a melting point greater than 500° C., a heat capacity greater than 0.9 J/g-C, and a density greater than 1.5 g/cc, c.) an electrical resistance heating element for charging said heat storage medium, d.) a manifold innervating said heat reservoir for transferring heat to a working fluid, e.) a vacuum pocket within said reservoir to accommodate the expansion of the heat storage medium within said reservoir, and f.) a means of automatically removing the working fluid outflow conduit from the reservoir and replacing it with an insulation plug.