Microwave utensil with reflective surface handle
AssigneeGeneral Motors Corporation
InventorGeorge B. Long
Life of this patent
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AssigneeGeneral Motors Corporation
InventorGeorge B. Long
Estimating the term…
A microwave oven has reflective walls and includes a magnetron distributing microwave energy throughout said oven. The oven includes an open top ceramic dish for supporting food to be cooked by said microwave energy. A ceramic cover closes said open top dish and each is homogeneously lossy throughout for browning food. The dish and cover have integral handle portions. Each handle portion has a first coating of reflective material on the handle portions only of said dish and said cover for reflecting microwave energy in said oven away from said handle portions to prevent heat buildup in said handle portions due to said microwave energy while the remaining lossy portions of the dish continue to facilitate the browning of food. Each handle portion has a second coating of heat insulating material on top of and coextensive respectively with each of said first coatings, said second coating having the characteristic of low heat conductivity to maintain said handle portions cool to the touch in the event there is a heat buildup in said handle portions due to conduction from the food and the remaining lossy portions of said dish.
In a microwave oven having reflective walls and including a magnetron and a stirrer for randomly distributing microwave energy from said magnetron toward said walls and throughout said oven, the improvement comprising a utensil in said oven having an open top dish for supporting food to be cooked by said microwave energy and a cover closing said open top, said dish being formed of a ceramic container portion with a pair of integral handle portions and being homogeneously lossy throughout all said portions for browning the food, said cover being formed of a ceramic container portion with an integral handle portion and being homogeneously lossy throughout all said portions for browning the food, a first coating of reflective shield material on the handle portions only of said dish and said cover reflecting microwave energy in said oven away from said handle portions to prevent heat buildup in said handle portions due to said microwave energy, and a second coating of heat insulating material on said handle portions coextensive respectively with each of said first coatings, said second coating having the characteristic of low heat conductivity to maintain said handle portions cool to the touch in the event there is a heat buildup in said handle portions due to conduction from said container portions of said utensil.
In a microwave oven having reflective walls and including a magnetron and a stirrer for randomly distributing microwave energy from said magnetron toward said walls and throughout said oven, the improvement comprising a utensil in said oven having an open top dish for supporting food to be cooked by said microwave energy and a cover closing said open top, said dish being formed of a ceramic container portion with a pair of integral handle portions and being homogeneously lossy throughout all said portions for browning the food, said cover being formed of a ceramic container portion with an integral handle portion and being homogeneously lossy throughout all said portions for browning the food, a first coating of reflective metallic foil directly on the handle portions only of said dish and said cover reflecting microwave energy in said oven away from said handle portions and sufficiently thin to be of low thermal mass to prevent heat buildup in said handle portions due to said microwave energy, and a second coating of heat insulating material on said handle portions on top of and coextensive respectively with each of said first coatings, said second coating having the characteristic of low heat conductivity to maintain said handle portions cool to the touch in the event there is a heat buildup in said handle portions due to conduction from said container portions of said utensil, said second coating being taken from the group consisting of tetraflouroethylene, polypropylene, phenolic, asbestos or porcelain.
Dependencies are inferred from the claim text.