Patent ID: 7919729
Filing Date: 2011-04-05
Classification: A47J

Abstract:
1. A heating vessel comprising: a bottom portion made of conductive materials and a dual-layer perimeter wall made of stainless steel, the dual-layer perimeter wall extending upwardly from the bottom portion and forming a perimeter and a cavity, the dual-layer perimeter wall has an outer wall and an inner wall wherein the outer wall is larger than the inner wall, and a adiabatic portion is formed between the inner wall and the outer wall, the adiabatic portion extending from the top end of the bottom portion to the top end of the perimeter wall, the inner wall is connected to the bottom portion; the adiabatic portion having an interlayer located between the inner wall and the outer wall and the inside of the interlayer is vacuum; wherein the interlayer of the adiabatic portion is additionally provided with an inner lining made of adiabatic materials; the outer wall of the dual-layer perimeter wall has at least one reinforced retractable rib located adjacent to the interlayer of the adiabatic portion.