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US 11,800,951 B1Granted
Cast iron composite cooking vessel
OwnerDavid Boyd Boberinventor
Life of this patent
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Abstract
A cooking utensil is described which provides a cast iron cooking surface, the reverse of which is metallurgically bonded to another member having higher thermal conductivity than cast iron. In some embodiments, the cast iron layer is bonded to a copper core, which is bonded to a stainless steel base. Two methods for producing such articles are also described.
Claims17
A cooking utensil, comprising:
- (a) a first member comprising at least one layer selected from the group consisting of copper and aluminum,
- (b) a second member having a cooking face and comprising cast iron,
- (c) the first member and the second member connected by means of a metallurgical bond.
A method of brazing composite cookware comprising the steps of,
- (a) providing a first member comprising at least one layer selected from the group consisting of copper and aluminum,
- (b) providing a second member comprising cast iron,
- (c) positioning the second member and first member in a spaced relation,
- (d) introducing a filler metal between the first member and second member,
- (e) heating the filler metal, the second member, and the first member above the melting temperature of the filler metal, and,
- (f) urging the first and second members together, whereby the molten filler metal is caused to flow throughout the joint.
3 more elements
A method of producing composite cookware comprising the steps of,
- (a) providing a first member comprising at least one layer selected from the group consisting of copper and aluminum,
- (b) coating at least one face of the first member with a metal having a lower melting point than cast iron, and,
- (c) introducing molten iron to the first member, whereby the coating of the first member is melted and a metallurgical bond is formed.
Dependencies are inferred from the claim text.