Patent ID: 7577343

Claim:
A steam generating device comprising: a flat casing including a first body and including a closed end and an open end, a hollow interior defined in the casing and at least two grooves defined in an inner periphery of the hollow interior, the flat casing including substantially parallel planar top and bottom surfaces, the surfaces being separated by a distance which is substantially less than a width of the planar surfaces, a hole defined through the planar bottom surface of the first body, an end connection plate extending from the open end of the casing and a seal engaged with a receiving groove defined in the end connection plate, and a heating device having a second body which is sized and shaped to be received in. the interior of the casing, the second body having an end board which is connected to the end connection plate of the casing so that the seal is clamped between the end connection plate and the end board, at least two elongate ridges extending from an outside of the second body in a direction substantially parallel to upper and lower surfaces of the second body and slidably engaged with the at least two grooves, a passage defined through the second body and located in a notch at one of the at least two elongate ridges, an inlet defined through the end board and located at a lower part of the end board, a chamber defined in a center of the second body and the hole in the first body communicating with the chamber, a lower space defined between the outside of the lower surface of the second body and the inner periphery of the planar bottom surface of the first body and beneath the at least two elongate ridges, an upper space defined between the outside of the upper surface of the second body and the inner periphery of the planar top surface of the first body and above the at least two elongate ridges, the upper space communicating with the passage and the chamber.