Patent ID: 8726798

Claim:
A radiant liquid heating container comprising: an enclosure adapted to hold a liquid; said enclosure includes a closed bottom, an outer portion and an opening for adding or extracting said liquid; a base shell including a bottom member and an outer circumferential surface projecting upwardly from the bottom member a predetermined distance to a top portion; wherein said base shell has a higher curvature than a curvature of said closed bottom of said enclosure, in a perpendicular direction with respect to a plane of the bottom member of said base shell, forming a continuous air gap between said bottom member of said base shell and said bottom of said enclosure without any point contact between the curvature of the base shell and the bottom of the enclosure; said base shell and said enclosure intersect each other at the top of said base shell wherein the outer circumferential surface projecting upwardly a predetermined distance from the bottom member of the base shell extends upwardly the predetermined distance on the outer portion of the enclosure; wherein said continuous air gap is formed between said bottom member of said base shell and said bottom of said enclosure without any point contact between the curvature of the base shell and the bottom of the enclosure and said continuous air gap is formed between the outer circumferential surface projecting upwardly the predetermined distance and the outer portion of said enclosure without any point contact between the outer circumferential surface projecting upwardly the predetermined distance and the outer portion of the enclosure and said top portion of said base shell is sealed at the point of intersection of the top portion of said base shell and said outer portion of the enclosure with a heat resistant material to avoid point contact of said base shell with said enclosure to avoid spot heating of a liquid within said enclosure by providing the continuous air gap between the bottom member of the base shell and the bottom of said enclosure without any point contact between the curvature of the base shell and the bottom of the enclosure and the continuous air gap between the outer circumferential surface projecting upwardly the predetermined distance and the outer portion of said enclosure without any point contact between the outer circumferential surface projecting upwardly the predetermined distance and the outer portion of the enclosure.