Foods and beverages: apparatus – Cooking – Boiler or deep fat fryer type
Reexamination Certificate
2000-07-10
2001-03-06
Simone, Timothy F. (Department: 1761)
Foods and beverages: apparatus
Cooking
Boiler or deep fat fryer type
C099S330000, C126S376100, C126S390100, C431S001000
Reexamination Certificate
active
06196119
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field related to the Invention
The present invention relates to a deep fat fryer for cooking foodstuffs in cooking oil supplied and heated in a frypot.
2. Description of the Related Art
A deep fat fryer of such a conventional type comprises, as shown in
FIG. 9
, a frypot
1
incorporating a box-like form of container of which the top side is open and the bottom side is closed and an apron
8
mounted to the top of the frypot
1
. The frypot
1
comprises a pair of opposed joint sidewalls
2
arranged parallel to each other and a pair of opposed bending sidewalls
3
. The bending sidewall
3
comprises an upper sidewall portion
4
at the upper side spaced widely from its counterpart, a lower sidewall portion
5
at the lower side spaced from its counterpart by a distance smaller than that of the upper sidewall portion
4
, a sloping sidewall portion
6
connecting the upper sidewall portion
4
and the lower sidewall portion
5
to each other, and an bottom sidewall portion
7
having an arcuate form in cross section bent inwardly of the lower sidewall portion
5
. The frypot
1
is commonly fabricated, as shown in
FIG. 10
, by punching and pressing metal sheets to form the two opposed joint sidewalls
2
having a symmetrical shape for sandwiching between the two opposed bending sidewalls
3
and then assembling and welding the joint sidewalls
2
and the bending sidewalls
3
securely. The frypot
1
can be heated by the combustion on burners
9
which are provided so as to sandwich the lower sidewall portions
5
of the opposed bending sidewalls
3
. In other words, the lower sidewall portions
5
are heating surfaces (heat dissipating sides).
The shape of the bending sidewall
3
is so designed that the frypot
1
is minimized in the volume of oil and increased in the heat absorbing area. The lower narrow part of the frypot
1
sandwiched between the two lower sidewall portions
5
is provided for collecting the cooking debris of foodstuffs and preventing the deterioration of the oil.
Problem that the Invention is to solve
However, the lower sidewall portions
5
of the bending sidewalls
3
which are the heating surfaces develop thermal expansion and contraction due to repeated cycles of heating and cancellation of the burner
9
and will hence receive thermal stress particularly at their joint to the joint sidewalls
2
and permit the generation of flaws or cracks.
SUMMARY OF THE INVENTION
The present invention is directed towards solving the above problem and its object is to provide a deep fat fryer equipped with a frypot hardly permitting the generation of flaws or cracks and a method of fabricating the deep fat fryer.
According to the present invention defined in claim
1
, the frypot is integrally fabricated by welding the paired frypot halves to each other along the vertical separating line which extends across the connect sidewalls to the bottom side along the center line orthogonal to the horizontal. As the welded joint is spaced from the lower sidewall portions of the bending sidewalls which are directly heated by the burner means, it will be less affected by thermal expansion and contraction of the lower sidewall portions and hardly receives thermal stress.
Also, the paired frypot halves of the frypot which are fixedly joined to each other by welding along the vertical separating line are separately formed by pressing metal sheets, hence allowing the number of components and the number of joints of the frypot to significantly decrease as compared with the prior art.
According to the present invention defined in claim
2
, the frypot is integrally fabricated by welding the frypot segments to each other along the horizontal separating line which extends horizontally across the connect sidewalls along the boundary between the intermediate sidewall portions and the lower sidewall portions or along the boundary between the intermediate sidewall portions and the upper sidewall portions. As the welded joint is spaced from the lower sidewall portions of the bending sidewalls which are directly heated by the burner, it will be less affected by thermal expansion and contraction of the lower sidewall portions and hardly receives thermal stress. Also, the two, upper and lower, frypot segments are separated from each other by the horizontal separating line, they can easily be fabricated by simple pressing.
REFERENCES:
patent: 4289111 (1981-09-01), Duncan et al.
patent: 4397299 (1983-08-01), Talylor et al.
patent: 4715807 (1987-12-01), Yokoyama et al.
patent: 4808107 (1989-02-01), Yokoyama et al.
patent: 4838244 (1989-06-01), Giles, Sr. et al.
patent: 4848317 (1989-07-01), Prudhomme et al.
patent: 4848318 (1989-07-01), Brewer
patent: 4863370 (1989-09-01), Yokoyama
patent: 4913041 (1990-04-01), Taber
patent: 4947824 (1990-08-01), Ejiri et al.
patent: 4955805 (1990-09-01), Ishiguro et al.
patent: 5020987 (1991-06-01), Ishiguro et al.
patent: 5038753 (1991-08-01), Yokoyama
patent: 5402713 (1995-04-01), King
patent: 5417202 (1995-05-01), Cote
Paloma Industries Limited
Pearson & Pearson LLP
Simone Timothy F.
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