Foods and beverages: apparatus – Cooking – Boiler or deep fat fryer type
Reexamination Certificate
2000-07-13
2001-06-05
Simone, Timothy F. (Department: 1761)
Foods and beverages: apparatus
Cooking
Boiler or deep fat fryer type
C099S403000, C099S413000
Reexamination Certificate
active
06240837
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the invention
This invention relates generally to electrothermal utensils, more particularly, it relates to an electrothermal cooker having a plurality of improved thermal insulator located between a casing and an inner pot, and a plurality of improved supporting means arranged between the inner pot and a pot base with better heat insulation and support effect.
2. Description of the prior art
A conventional electrothermal cooker, as disclosed in U.S. Pat. No. 4,995,312, mainly comprises a metallic pot and a heat-generating resistor, wherein the resistor is used to heat the pot up to 150° C. or more; as the pot is enclosed by a generic plastic casing that cannot stand temperature higher than 150° C., hence, an air layer is formed in the circular wall and the pot base of the pot for segregation of the plastic casing; the metallic pot is isolated by the air layer except that it is connected with a thermo-insulating ring, which also contacts the upper rim of the casing.
However, as the thermo-insulating ring is made of high-priced polyurethane or polyester, the competitive capability of the foregoing electrothermal cooker is inevitably weakened. In view of the defect, this invention is to provide an improved low-cost thermo-insulating structure with excellent efficacy for the electrothermal cooker.
SUMMARY OF THE INVENTION
The primary object of this invention is to provide an electrothermal cooker having a plurality of insulators disposed between a casing and an inner pot for achieving heat insulation efficiently and reducing cost.
Another object of this invention is to provide an electrothermal cooker having a plurality of supporting means disposed between an inner pot and a pot base for holding the inner pot stably.
In order to realize above said objects, this invention comprises a casing, a cover, an inner pot, a heating means, and a pot base, and is characterized in: a plurality of heat insulators and supporting means disposed between the casing and the inner pot, and between the pot base and the inner pot respectively.
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Lyu Jan Co., Ltd.
Simone Timothy F.
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