Rapid heating, uniform, highly efficient griddle
First Claim
1. A system for providing a cooking surface adapted to be heated to a predetermined temperature for cooking food, comprising:
- an induction coil for generating a magnetic field; and
a griddle plate positioned adjacent the induction coil, said griddle plate including a first layer of magnetically permeable material having a first Curie temperature and a second layer for use as a cooking surface, said magnetically permeable material being selected to produce said predetermined temperature on said cooking surface and to maintain a substantially uniform temperature across the cooking surface of said griddle plate when said magnetically permeable material is heated to its Curie temperature upon exposure to said magnetic field.
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Accused Products
Abstract
A basically commercially fast heat highly efficient griddle has interchangeable griddle plates including magnetically permeable materials having Curie temperatures which may be the same or different to provide different cooking temperatures, the plates being heated by induction coils providing sufficient energy to heat the plates to their effective Curie temperatures in the presence of loads and of a design to maintain a uniform cooking temperature across the griddle plate to within less than an inch of the edges of the plates. The plates may be placed in an enhanced idle condition at cooking temperature by placing a cover over the plates or region of a plate not in use. Increased efficiency is further due to an insulator blanket placed between the griddle plates and coils.
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Citations
25 Claims
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1. A system for providing a cooking surface adapted to be heated to a predetermined temperature for cooking food, comprising:
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an induction coil for generating a magnetic field; and a griddle plate positioned adjacent the induction coil, said griddle plate including a first layer of magnetically permeable material having a first Curie temperature and a second layer for use as a cooking surface, said magnetically permeable material being selected to produce said predetermined temperature on said cooking surface and to maintain a substantially uniform temperature across the cooking surface of said griddle plate when said magnetically permeable material is heated to its Curie temperature upon exposure to said magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A three-layer composite griddle plate having a planar cooking surface comprising:
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first and second planar layers, said first layer being formed of a magnetically permeable material having a predetermined Curie temperature, and said second layer for use as a cooking surface being formed as a uniform temperature across the cooking surface of said griddle plate; and a third planar layer formed of another material and located between said first and second layers, said first, second and third layers being formed with different thicknesses. - View Dependent Claims (19, 20, 21)
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22. A method for fabricating a three-layer composite griddle plate having a planar cooking surface comprising the steps of:
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selecting at least one magnetically permeable material having a Curie temperature for use as a first layer of the planar griddle plate; selecting a second layer as a cooking surface located opposite said first layer, said first and second layers having predetermined thicknesses; and selecting another material for use as a third layer located between said first and second layers of the planar griddle plate, said third layer having a predetermined thickness different from said predetermined thicknesses of said first and second layers, said magnetically permeable material being used to uniformly heat said second layer via said third layer for maintaining a substantially uniform temperature across the cooking surface of said griddle plate when said first layer is heated to its Curie temperature. - View Dependent Claims (23, 24, 25)
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Specification