Thermal cooker

Details Thermal cooker Thermal cooker

2000-12-06

2001-07-24

Simone, Timothy F. (Department: 1761)

Foods and beverages: apparatus

Cooking

Boiler or deep fat fryer type

C099S340000, C099S403000, C099S448000, C126S369000, C126S373100, C220S912000

Reexamination Certificate

active

06263787

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a cooker having high insulating efficiency and capable of boiling and smothering food, and more particularly to a thermal cooker that includes an inner pot having a thermal storage ring connected to an outer bottom surface and an outer pot for receiving the inner pot therein. The inner pot with the thermal storage ring is heated to boil food and juice contained therein and then positioned into the outer pot, so that food and juice in the inner pot is kept boiling with heat released from the thermal storage ring and then be smothered for a period time.
It is a common cooking manner in Chinese food preparation to boil food in a pot or saucepan and then simmer the food gently to produce a delicious dish. A disadvantage of this type of cooking manner is it takes a lot of time and thermal energy to cook. To reduce the time and thermal energy needed in cooking food, there is a thermal cooker developed and available in the market.
FIG. 4
is a schematic sectional view of the currently available thermal cooker A. As shown, the thermal cooker A includes an outer pot A
1
containing insulating material, such as polylone, foamed plastics, etc., and an inner pot A
2
adapted to be positioned in the outer pot and closed with an inner lid. Food is first boiled in the inner pot A
2
. The inner pot A
2
with the boiled food is then positioned into the outer pot A
1
that is in turn closed with an outer lid, so that food in the inner pot A
2
is kept smothered in the thermal cooked for a period of time with the heat in the boiled food without using other external heat source. Thermal energy needed to cook food is therefore reduced. However, such conventional thermal cooker does not boil food but only smother food that has been previously boiled outside the thermal cooker, and boiled food smothered in the thermal cooker usually does not taste perfectly.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a thermal cooker capable of boiling and smothering food to produce perfectly delicious food at reduced thermal energy.
To achieve the above and other objects, the thermal cooker of the present invention mainly includes an inner pot having a thermal storage ring connected to an outer bottom surface and an outer pot for receiving the inner pot therein. When the inner pot of the thermal cooker is heated to boil food therein with an external heat source, the thermal storage ring is heated to glow at the same time and thereby store a large amount of heat. The inner pot with the boiled food and the glowing thermal storage ring is then positioned into the outer pot and closed with inner and outer lids. At this point, the thermal storage ring releases heat stored therein to keep boiling food in the inner pot for a period of time before the boiled food is smothered in the thermal cooker with heat in the inner pot.
The thermal storage ring is also adapted to use with other types of cookware, particularly various types of flat-bottomed pans. The thermal storage ring provided near a bottom of the cookware tend to concentrate flames to prevent them from stretching outward and enables complete combustion of gas and accordingly safe use of gas stove and reduced consumption of thermal energy.


REFERENCES:
patent: Re. 16011 (1925-03-01), Simon
patent: 899244 (1908-09-01), Chase
patent: 1214992 (1917-02-01), Boleratz
patent: 2081751 (1937-05-01), Lendrum et al.
patent: 3808963 (1974-05-01), Ludena
patent: 4164174 (1979-08-01), Wallsten
patent: 4401017 (1983-08-01), Feld
patent: 4462308 (1984-07-01), Wang
patent: 4604989 (1986-08-01), Kita
patent: 4739698 (1988-04-01), Allaire
patent: 5287798 (1994-02-01), Tkaeda
patent: 5584235 (1996-12-01), DuBois et al.
patent: 5816139 (1998-10-01), Scorta Paci

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