Cooking Utensil
AssigneeBose Corporation
InventorRandall Mathieu
Life of this patent
Estimating the term…
Abstract
A cooking utensil for use with an induction cooktop having a cooktop surface and an induction heating coil. The cooking utensil has an inner wall made from an electrically conductive material, an outer wall made from an electrically non-conductive material, and a gap between the inner and outer walls. There is an intermediate wall in the gap. The intermediate wall divides the gap into an inner chamber between the inner wall and the intermediate wall and an outer chamber between the outer wall and the intermediate wall.
Claims35
A cooking utensil for use with an induction cooktop having a cooktop surface and an induction heating coil, the cooking utensil comprising:
- an inner wall comprising an electrically conductive material;
- an outer wall comprising an electrically non-conductive material;
- a gap between the inner and outer walls;
- and
- an intermediate wall in the gap, the intermediate wall dividing the gap into an inner chamber between the inner wall and the intermediate wall and an outer chamber between the outer wall and the intermediate wall.
A cooking utensil for use with an induction cooktop having a cooktop surface and an induction heating coil, the cooking utensil comprising:
- an outer wall that is the outermost wall of the cooking utensil, the outer wall comprising an electrically non-conductive material, a bottom portion located on the cooktop surface during operation of the induction heating coil, and a sidewall portion spaced above the cooktop surface when the bottom portion of the outer wall is located on the cooktop surface;
- a layer of thermally insulating material on the inside of the outer wall, wherein the layer of thermally insulating material has an area that substantially covers the bottom portion of the outer wall and defines an outer edge closest to the sidewall portion of the outer wall;
- an inner wall comprising the innermost wall of the cooking utensil and a ferromagnetic target that is adapted to be heated by induction, wherein the target is directly above and spaced from the layer of thermally insulating material, the innermost wall defining a bottom portion located closest to the cooktop surface during operation of the induction heating coil and a sidewall portion located farther from the cooktop surface during operation of the induction heating coil;
- wherein the innermost and outer walls are spaced from one another by a gap, except at a joint location where they are coupled together, wherein the joint location is proximate both the innermost wall sidewall portion farthest from the cooktop surface when the bottom portion of the outer wall is located on the cooktop surface and the outer wall sidewall portion farthest from the cooktop surface when the bottom portion of the outer wall is located on the cooktop surface;
- and
- a thin, solid generally annular partition, the partition positioned in the gap between the innermost wall and the outer wall, wherein the partition is in contact with the layer of thermally insulating material proximate its outer edge and the partition is in contact with one or both of the outer wall and the inner wall proximate the joint location.
A method for manufacturing a cooking utensil, comprising:
- providing an inner wall that includes at least some electrically conductive material that is configured to be a target for an induction heating coil;
- providing an outer wall formed of an electrically non-conductive material;
- providing a layer of insulation;
- providing a generally annular intermediate wall;
- locating the layer of insulation on the outer wall;
- locating the intermediate wall on the layer of insulation;
- and
- coupling the inner and outer walls such that the layer of insulation and the intermediate wall are located between the inner wall and outer wall, with the intermediate wall in contact with the layer of insulation and in contact with at least one of the inner wall and the outer wall.
Dependencies are inferred from the claim text.