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| United States Patent | 4539898 |
| Link to this page | http://www.wikipatents.com/4539898.html |
| Inventor(s) | Bishop; Charles D. (Dallas, TX);
Stamps; Kenneth H. (Garland, TX);
Turney; David L. (Dallas, TX) |
| Abstract | Semiautomatic food frying apparatus is disclosed which provides apparatus
which may be easily and safely operated to prepare small portions of
various food products. In one embodiment, the food frying apparatus
includes an upright cabinet with a fan assembly mounted to exhaust air
through the top of the cabinet while drawing air in, through and from the
lower portion of the cabinet. A removable one-piece filter unit is
positioned in the path of air flow to remove odors, gases, smoke, etc. . .
. from the air before the air is exhausted back into the room. The
removable filter includes a paper filter together with activated charcoal
particles configured as an integral unit. In another embodiment, the fan
assembly and filter unit are replaced by a closed-loop air cleaning system
which does not discharge the internal air of the apparatus into the room.
A container for holding a supply of cooking oil is located in the lower
portion of the cabinet. Mechanism is provided for automatically lowering a
cooking basket, with food therein, into the cooking oil for a
predetermined time and then raising the cooking basket from the cooking
oil. |
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Title Information  |
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Drawing from US Patent 4539898 |
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Semiautomatic food frying apparatus |
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| Publication Date |
September 10, 1985 |
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| Filing Date |
August 8, 1983 |
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Title Information  |
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References  |
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| *references marked with an asterisk below are user-added references |
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Foreign References |
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Other References |
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Other References |
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References  |
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| Market Size |
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Estimate the gross annual revenues of the relevant market
sector:
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| Market Share |
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Estimate the percentage of the relevant market sector this invention will capture:
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| Reasonable Royalty |
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What percentage of gross sales should the inventor or assignee be paid?
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Public's "Guesstimation" of Royalty Value
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| Market Size | N/A | [No votes] | | x | Market Share | N/A | [No votes] | | x | Reasonable Royalty | N/A | [No votes] |
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Market Review  |
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Technical Review  |
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Claims  |
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We claim:
1. Semiautomatic food frying apparatus adapted for use in an enclosed space
without connection to an outside exhaust system, said apparatus
comprising:
a cabinet adapted to be supported at a suitable working height and having a
top panel, side panels, a rear panel and a front panel, at least one of
said panels being configured to allow access to the interior of said
cabinet;
a container located in said cabinet, for holding a supply of cooking oil;
means, integral with said container, for heating said container;
means for supporting food products in the cooking oil during the cooking of
said food products, said means for supporting food products includes a
handle means; and
means to hold said means for supporting food products while automatically
lowering said means for supporting food products into said supply of
cooking oil for a predetermined time and then raising said means for
supporting food products out of said supply of cooking oil, said means for
supporting food products being held by said means to hold by using and
resisting the forces of gravity and rotation applied to said means to hold
through said means for supporting food products without the requirement
for releasable latching means, said means to hold comprising:
(a) means to engage said handle means in a slidably-fitting relationship
while supporting same, said means to engage comprises at least one
U-shaped channel device configured to be capable of supporting said handle
means along three separate surfaces, said means to engage further
comprising stop means attached to a predetermined end of said U-shaped
channel device to engage a fourth surface of said handle means,
(b) rotatable means attached to said means to engage and capable of
rotating in both directions within defined limits,
(c) means to provide a rotatable force to said rotatable means, and
(d) means to control the means to provide such that the rotatable force is
controlled in amount of time of application as well as direction.
2. The apparatus of claim 1 wherein said rotatable means comprises a shaft
of predetermined length and diameter.
3. The apparatus of claim 1 wherein said means to provide a rotatable force
comprises a reversible DC motor operatively connected to said rotatable
means.
4. The apparatus of claim 3 wherein said means to control comprises a timer
switch operatively connected to an up limit-switch and a down limit-switch
to control the application and polarity of a DC supply voltage to said
reversible DC motor.
5. The apparatus of claim 1 further including
blower means, located in said cabinet, for circulating air through said
semiautomatic food frying apparatus along a predetermined path and exiting
at a predetermined location;
a filter unit removably positionable, as a onepiece unit, in said
predetermined air path and upstream from said blower means, said filter
unit comprising two individual and separate elements with one element
comprising paper and the second element comprising charcoal.
6. The apparatus of claim 5 wherein said filter unit comprises:
a solid bottom portion having a first side and a second side;
a paper housing element with opposed first and second open ends and having
a predetermined inside diameter and a predetermined outside diameter, said
paper housing element having said first open end resting against said
first side of said solid bottom portion;
a housing element with opposed first and second open ends and having a
predetermined inside diameter and a predetermined outside diameter, said
predetermined outside diameter being smaller than said predetermined
inside diameter of said paper housing element, said housing element
including air passage means formed in the wall thereof, said housing
element having said first open end thereof resting against said first side
of said solid bottom portion, said housing element being positioned to be
coaxial with said paper housing element;
a top portion having an aperture formed therein, said top portion being
positioned such that said aperture is coaxial with said paper housing
element and said housing element and supporting said second ends of said
paper housing element and said housing element; and
a predetermined amount of charcoal positioned in the volume formed by said
solid bottom portion, said top portion, said paper housing element and
said housing element.
7. The apparatus of claim 6 further including fastening means operatively
positioned between said solid bottom portion and said top portion.
8. The apparatus of claim 6 wherein said charcoal is activated charcoal.
9. The apparatus of claim 5 wherein said filter unit is positioned to
divide the interior of said cabinet into an upper portion and a lower
portion.
10. The apparatus of claim 9 further including a fire extinguisher
positioned in said upper portion, said fire extinguisher including a
discharge head and a sensor positioned in said lower portion, said fire
extinguisher including means for removing power to said food frying
apparatus upon activation of said fire extinguisher.
11. The apparatus of claim 1 further including means for sensing the
temperature of said container for holding a supply of cooking oil and for
removing power from said means for heating said container if said
temperature exceeds a predetermined value.
12. The apparatus of claim 1 further including means for sensing the
temperature of said supply of cooking oil and for removing power from said
means for heating said container for holding a supply of cooking oil if
said temperature exceeds a predetermined value.
13. The apparatus of claim 1 further including means for the sensing the
temperature of the air in a predetermined location within said cabinet and
for removing power to said food frying apparatus if said temperature
exceeds a predetermined value.
14. The apparatus of claim 1 wherein said front panel includes
an opening therein,
a door which is pivotably attached to said front panel at a lower edge of
said opening, and
support means operatively attached between said front panel and said door
such that said door is supported in a horizontal position when said door
is pivoted from a closed position with respect to said opening.
15. The apparatus of claim 1 further including insulative means juxtaposed
with respect to predetermined portions of said container to diminish heat
loss from said container.
16. The apparatus of claim 15 further including means for holding and
supporting said means for supporting food products such that said means
for supporting food products is positioned over said container for holding
a supply of cooking oil and out of contact with said supply of cooking
oil, said means for holding and supporting is supported by said insulative
means.
17. The apparatus of claim 15 wherein said insulative means comprises a
container-like device whose internal configuration is substantially the
same as the external configuration of said container for holding a supply
of cooking oil such that said container for holding a supply of cooking
oil will sit down in said container-like device with the outside surface
of said container for holding a supply of cooking oil being juxtaposed
with respect to the inside surface of said container-like device.
18. The apparatus of claim 17 wherein said container-like device is formed
of a high temperature plastic.
19. The apparatus of claim 17 wherein said container-like device is formed
of stainless steel with double walls and insulation material positioned
between said double walls.
20. Food frying apparatus for use in an enclosed space without connection
to an outside exhaust system, said apparatus comprising:
a cabinet adapted to be supported at a suitable working height and having a
top panel, side panels, a rear panel and a front panel, at least one of
said panels being configured to allow access to the interior of said
cabinet;
a container, located in said cabinet, for holding a supply of cooking oil;
means, integral with said container, for heating said container;
means for supporting food products in the cooking oil during the cooking of
said food products, said means for supporting food products includes a
handle means; and
a closed-loop air cleaning system operatively attached to said cabinet and
configured to receive air from the inside of said cabinet, to pass said
received air through a predetermined portion of said closed-loop air
cleaning system to remove water and predetermined impurities from said
received air and then to deposit said received air, minus the removed
water and impurities, back into the inside of said cabinet, said
closed-loop air cleaning system comprises:
(a) a first inlet means operatively attached to said cabinet to receive air
exiting from the inside of said cabinet;
(b) a first outlet means operatively attached to said cabinet to deposit
said air, received from the inside of said cabinet, back into the inside
of said cabinet;
(c) a first housing means operatively connected between said inlet means
and said outlet means to provide a complete air path from the inside of
said cabinet, through a predetermined portion of said closed-loop air
cleaning system and back to the inside of said cabinet;
(d) a first blower means positioned in said complete air path to move the
air at a predetermined rate;
(e) a second housing means operatively configured and positioned to be in a
surrounding relationship with a predetermined portion of said first
housing means;
(f) a second inlet means operatively attached to said second housing means
to receive air from room containing said cabinet;
(g) a second outlet means operatively configured to deposit air received
from said second housing means back into said room;
(h) a second blower means operatively positioned to move the air through
said second housing means at a predetermined rate.
21. The apparatus of claim 20 further including cooling fins operatively
attached to the inside surface of said first housing means and protruding
inwardly therefrom.
22. The apparatus of claim 20 further including cooling fins operatively
attached to the outside surface of said first housing means and protruding
outwardly therefrom toward the inside surface of said second housing
means.
23. The apparatus of claim 20 further including collection means
operatively attached to a lowermost portion of said first housing means to
collect said water and impurities from the air received from the inside of
said cabinet.
24. The apparatus of claim 20 further including means to hold said means
for supporting food products while automatically lowering said means for
supporting food products into said supply of cooking oil for a
predetermined time and then raising said means for supporting food
products out of said supply of cooking oil, said means to hold comprising:
(a) means to engage said handle means in a slidably-fitting relationship
while supporting same,
(b) rotatable means attached to said means to engage and capable of
rotating in both directions within defined limits,
(c) means to provide a rotatable force to said rotatable means, and
(d) means to control the means to provide such that the rotatable force is
controlled in amount of time of application as well as direction.
25. The apparatus of claim 24 wherein said means to engage comprises a
U-shaped channel device configured to be capable of supporting said handle
means along three separate surfaces, said means to engage further
comprising stop means attached to a predetermined end of said U-shaped
channel device to engage a fourth surface of said handle means.
26. The apparatus of claim 24 wherein said rotatable means comprises a
shaft of predetermined length and diameter.
27. The apparatus of claim 24 wherein said means to provide a rotatable
force comprises a reversible DC motor operatively connected to said
rotatable means.
28. The apparatus of claim 27 wherein said means to control comprises a
timer switch operatively connected to an up limit-switch and a down
limit-switch to control the application and polarity of a DC supply
voltage to said reversible DC motor.
29. The apparatus of claim 20 further including means for holding and
supporting said means for supporting food products such that said means
for supporting food products is positioned over said container for holding
a supply of cooking oil and out of contact with said supply of cooking
oil, said means for holding and supporting is supported by said insulative
means.
30. The apparatus of claim 20 further including means for sensing the
temperature of said container for holding a supply of cooking oil and for
removing power from said means for heating said container if said
temperature exceeds a predetermined value.
31. The apparatus of claim 20 further including means for sensing the
temperature of said supply of cooking oil and for removing power from said
means for heating said container for holding a supply of cooking oil if
said temperature exceeds a predetermined value.
32. The apparatus of claim 20 further including means for the sensing the
temperature of the air in a predetermined location within said cabinet and
for removing power to said food frying apparatus if said temperature
exceeds a predetermined value.
33. The apparatus of claim 20 wherein said front panel includes
an opening therein,
a door which is pivotably attached to said front panel at a lower edge of
said opening, and
support means operatively attached between said front panel and said door
such that said door is supported in a horizontal position when said door
is pivoted from a closed position with respect to said opening.
34. The apparatus of claim 20 wherein said insulative means comprises a
container-like device whose internal configuration is substantially the
same as the external configuration of said container for holding a supply
of cooking oil such that said container for holding a supply of cooking
oil will sit down in said container-like device with the outside surface
of said container for holding a supply of cooking oil being juxtaposed
with respect to the inside surface of said container-like device.
35. The apparatus of claim 34 wherein said container-like device is formed
of a high temperature plastic.
36. The apparatus of claim 34 wherein said container-like device is formed
of stainless steel with double walls and insulation material positioned
between said double walls. |
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Claims  |
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Description  |
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BACKGROUND OF THE INVENTION
1. Field of the Invention p The present invention relates in general to
food preparation. More particularly, this invention relates to apparatus
for the deep-fat frying of food and specifically is directed to
semiautomatic deep-fat frying apparatus for the frying of food in a retail
environment while essentially eliminating the introduction of smoke and/or
odor into the surrounding environment.
Although the present invention is applicable for deep-fat frying of
numerous types of food products, it has been found to be particularly
useful in the frying of frozen french-fry cut potato pieces or
breaded-type snack foods in a bar or fast-food counter environment.
Therefore, without limiting the applicability of the invention to "frying
of frozen french-fry cut potato pieces", the invention will be described
in this environment.
Deep-fat fryers or french fryers are widely used in the restaurant business
for cooking various food products such as french-fried potatoes, fish and
chicken. Typically, such french fryers comprise a deep tank containing a
pool of cooking oil in the lower part of the tank with the cooking oil
being heated by an immersed electric heating element or by gas flame. The
uncooked food product is placed in a basket which is lowered into the
heated oil for the desired cooking period. When the product is done, as
determined by visual inspection by the restaurant employee or the sound of
an audio timer, the basket should be removed from the oil by the employee
and the product served to a customer or transferred to a holding station
where it is kept warm by heat lamps until served.
With the advent of convenience stores, self-service stations which also
handle convenience store items, etc., the need for apparatus to provide
hot food products such as french-fried potatoes, fish and chicken has
increased. Since there is normally only one employee for such businesses,
the apparatus must be of the type which is easily and safely operated by
the employee. The apparatus must also be reasonable in cost to the
business proprietor, be reliable in its operation and not pollute the
surrounding environment.
2. Description of the Prior Art
In the prior art, various machines are known for processing and dispensing
small batches or individual servings of a food product, such as
french-fried potatoes.
U.S. Pat. No. 3,667,373 discloses an automated coinoperated fried potato
machine containing a removable multiple bin supply tray to hold a
predetermined quantity of potatoes in each bin and a mechanism to feed the
potatoes from successive bins to a hopper which empties into a basket
positioned within a cooking bowl. The cooking bowl is pivotally mounted
above a storage vessel containing hot cooking oil. An oil lift assembly
supplies oil from the storage vessel to the cooking bowl for each batch of
potatoes and after the potatoes are fried, the basket is pivoted to dump
the fried potatoes into a serving tray fed from a supply stack. The
cooking bowl is pivoted to dump the oil through a removable and
replaceable filter member and into the storage vessel.
U.S. Pat. No. 3,818,820 discloses an automatic machine for preparing fried
potato products which contains a food hopper for storing the potatoes to
be fried. A slidably mounted ejection scoop at the bottom of the food
hopper dispenses the right amount of potatoes into a basket immersed into
a vat of cooking oil. At the end of a predetermined time, the basket is
pivoted to drop the fried potatoes into a waiting container. The machine
also contains a fan to extract the fumes via a replaceable charcoal filter
unit. An automatic fire extinguisher unit is mounted near the fume outlet
to extinguish the oil if it should catch fire.
U.S. Pat. No. 3,981,232 discloses a free standing fryer having a fat fryer
located within the interior of a cabinet. The cabinet includes a roof
section which houses a fan means for extracting air and fumes from the
cabinet and forcing the same through filter means which includes charcoal.
A fire extinguisher is also disclosed.
Graham (U.S. Pat. No. 3,971,307) discloses a deep fat fryer including a
front-mounted control panel spanning the gap between two
forwardly-extending arms of a generally H-shaped tubular frame which forms
an opened-topped hinged lid for the fat reservior. The H-shaped tubular
frame is hinged at the rear portion thereof, opposite of the front-mounted
control panel. A submersible heating element is attached to the
front-mounted control panel and extends downwardly into the cooking oil.
When the H-shaped tubular frame is raised upwardly, the heating element is
raised out of the cooking oil and moves with the tubular frame.
The present invention as claimed is intended to provide a solution to
various prior art deficiencies including the reliability problems
associated with the complex automated mechanisms. Also the high initial
cost of daily operation and mantenance. In addition, the unacceptable
service requirements associated with the highly automated mechanisms.
There is also the problem of air pollution by the odor and smoke emitted
from some of the machines. Some machines also tend to allow small amounts
of cooking oil to exit from the machine. Also, the relative large physical
size of the automated units can limit the location of the mechanism as
well as the need for an external exhaust. In some prior art devices which
store the food, there is a risk of spoilage and contamination of the food.
In some units, it is inconvenient and difficult to clean the parts in
contact with the oil and oily foods because of the complex automated
mechanisms. In addition, many machines are of a design which does not
allow for fast and easy removal and replacment of parts and units.
SUMMARY OF THE INVENTION
The present invention provides food frying apparatus which may be easily
and safely operated to prepare small portions of various food products.
The apparatus is a small unit for placement on a counter top without a
requirement for an exhaust duct external to the room or for special wiring
supplying 220 volt service. Emphasis is placed on ease of use, ease of
cleaning and ease of replacement of parts, if needed. The food frying
apparatus includes an upright cabinet which is rectangular-shaped in side
profile. In one embodiment, a fan assembly is mounted in the upper-most
portion of the cabinet and exhausts air through the top of the cabinet
while drawing air in, through and from the lower portion of the cabinet.
In this embodiment, a removable filter unit is positioned in the path of
air flow upstream from the fan assembly to remove odors, gases, smoke,
etc. from the air before the air is exhausted back into the room. The
removable filter includes a paper filter together with activated charcoal
particles configured as an integral unit. In a second embodiment, a unique
closed-loop air cleaning system is provided to remove smoke, water vapors,
gases, etc. from the air internal to the food frying apparatus and does
not exhaust the internal air into the room.
A container for holding a supply of cooking oil is located in the lower
portion of the cabinet and is positioned in an insulative shroud with a
resulting decrease in BTU's required to operate the apparatus. The heater
element is embedded in the bottom portion of the container and does not
directly contact the cooking oil. A fire extinguisher is automatically
activated in case of fire in the apparatus. Means are provided for
supporting a cooking basket out of the oil when not being used for
cooking. Safety means are provided for removing power to the unit when a
fire occurs or when the air within the lower portion of the apparatus
exceeds a predetermined temperature. Safety means are provided for
removing power to the heater element when the cooking oil exceeds a
predetermined temperature or when the container for the cooking oil
exceeds a predetermined temperature. Means are provided for automatically
lowering the cooking basket (containing the food) into the cooking oil for
a predetermined time and then raising the cooking basket out of the
cooking oil. Means are included in the apparatus to provide a signal when
a predetermined cooking time has elapsed and/or the cooking basket is
raised out of the oil.
Among the advantages offered by the present invention is the compactness,
high reliability and safety features provided by the apparatus. The
present invention allows the cooking to occur in an inside area without
need for an external exhaust and without the need to provide special
wiring, such as 220 volt. The present invention allows the simultaneous
cooking of two separate batches of food. The present invention provides
food frying apparatus which may be disassembled, without use of tools, for
easy cleaning and replacement. The physical size of the invention is small
so that it is capable of being placed in a large number of locations.
Another advantage of the present invention is the low cost of daily
operation of the apparatus.
Examples of the more important features of this invention have thus been
summarized rather broadly in order that the detailed description thereof
that follows may be better understood, and in order that the contribution
to the art may be better appreciated. There are, of course, additional
features of the invention that will be described hereinafter and which
will also form the subject of the claims appended hereto. Other features
of the present invention will become apparent with reference to the
following detailed description of a presently preferred embodiment thereof
in connection with the accompanying drawing, wherein like reference
numerals have been applied to like elements, in which:
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a simplified perspective view of the semiautomatic food frying
apparatus according to the present invention;
FIG. 2 is a simplified perspective view of the semiautomatic food frying
apparatus according to the present invention with portions of the cabinet
being displaced to expose apparatus to view;
FIG. 3 is a simplified perspective view of a cooking basket of the
semiautomatic food frying apparatus according to the present invention;
FIG. 4 is a simplified side elevational view of a handle guide and holder
device used in conjunction with a cooking basket of the semiautomatic food
frying apparatus according to the present invention;
FIGS. 5A and 5B are simplified side elevational views of a basket hanger or
holder of the semiautomatic food frying apparatus according to the present
invention;
FIG. 6 is a simplified prespective view of the filter according to the
present invention;
FIG. 7 is a simplified exploded view of the filter according to the present
invention;
FIG. 8 is a simplified side elevational view of a container or vat,
partially in section, and its relationship to the holder or shroud
according to the present invention;
FIG. 9 is a simplified top plan view of the heater and temperature control
unit of the present invention;
FIG. 10 is a simplified perspective view of the mechanism to automatically
lower and raise the cooking basket of the semiautomatic food frying
apparatus according to the present invention;
FIG. 11 is a simplified schematic diagram of the electrical power and
safety elements of the semiautomatic food frying apparatus, using a
removable filter, according to the present invention;
FIG. 12 is a simplified schematic diagram of the electrical portion of the
mechanism to automatically lower and raise the cooking basket of the
semiautomatic food frying apparatus according to the present invention;
FIG. 13 is a simplified schematic of the closed-loop air cleaning system of
the semiautomatic food frying apparatus according to the present
invention;
FIG. 14 is a simplified prespective view, partially in section, of the
close-loop air cleaning system according to the present invention;
FIG. 15 is a simplified schematic of the blower means for the closed-loop
air cleaning system of the semiautomatic food frying apparatus according
to the present invention;
FIG. 16 is a simplified perspective view of a manual version of the food
frying apparatus according to the present invention;
FIG. 17 is a simplified perspective view of the manual version of the food
frying apparatus according to the present invention with portions of the
cabinet being displaced to expose apparatus to view; and
FIG. 18 is a simplified schematic diagram of the electrical power and
safety elements of the manual version of the food frying apparatus
according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawing and in particular to FIGS. 1 and 2
semiautomatic food frying apparatus according to the present invention is
generally referred to by reference numeral 10. The semiautomatic food
frying apparatus 10 includes an upright cabinet 12 which is generally
rectangular in shape in side profile. Access to the inside portions of
upright cabinet 12 is provided by various means which includes a top cover
portion 14, a removable front portion 16 and an opening 18 in the lower
portion of front portion 16. Opening 18 is coverable by a pivotal tray or
door 20 which is attached by hinge means (not shown) to front portion 16
such that tray or door 20 may pivot downwardly to a generally horizontal
position as shown (partially) in phantom. Tray or door 20 is supported in
the generally horizontal position by two support rods 22 (only one being
shown), one support rod 22 being at each end of tray or door 20. The upper
end of each support rod 22 is mounted for sliding movement through
aperture 24 of support bracket 26 (only one being shown) with each support
bracket 26 being mounted to the flange 28 defining opening 18. Positioned
below opening 18 is an air inlet opening 30 covered by mesh or screen 32.
Control box 38 is held against the inside surface of side panel 40 by cover
42 and fasteners 44 and includes on/off switch 46, power indicator light
48, timer switch 49 and the input connector 50 for power cord 52.
Top cover portion 14 is pivotable upwardly and includes air outlet opening
54 covered by mesh or screen 56. Top cover portion 14 is pivotally
attached to rear panel 58 by hinge means 60 and is supportable in the
raised position by support bracket 62. Support bracket 62 is attached
between top cover portion 14 and side panel 64. Fan assembly 66 is
attached to the underside of the top cover portion 14 such that the
exhaust opening of fan assembly 66 is aligned with air outlet opening 54.
Shelf 68 comprising angle-iron bracket material is located at a
predetermined height above floor panel 72 and is attached to side panels
40 and 64 and rear panel 58. In the embodiment which uses a removable
filter unit 70 (see FIG. 6) and exhausts the air from the semiautomatic
food frying apparatus 10 back into the room, shelf 68 supports removable
filter means 70 and essentially divides the semiautomatic food frying
apparatus 10 into two basic areas. The first or upper area being one where
the air contained in the semiautomatic food frying apparatus 10 is cleaned
before it is exhausted to the surrounding air through air outlet opening
54. The second or lower area being the food preparation or frying area.
Fire extinguisher 74 is attached to rear panel 58 by fastening means 76
and is located in the first or upper area with the head and sensor portion
78 extending through an aperture 80 into the second or lower area. When
the head and sensor portion 78 senses a fire, the fire extinguisher 74 is
automatically activated to extinguish the fire. In the embodiment which
uses the closed-loop air cleaning system (to be discussed below) apertures
75 and 77 are formed in rear panel 58 in predetermined locations such as
to be aligned with portions of the closed-loop air cleaning system. In the
embodiment which uses the closed-loop air cleaning system, fan assembly 66
is not used and will be removed and air outlet opening 54 and air inlet
opening 30 will be closed.
Container or vat 82 sits or fits down into holder or shroud 84 which sits
on floor panel 72. Container or vat 82 comprises a material such as an
aluminum alloy which readily conducts heat while holder or shroud 84
comprises a material such as a high temperature plastic or material which
acts as an insulator and does not conduct heat. Holder or shroud 84 is
held in place by tabs 86 with a tab 86 being located at each corner of
holder or shroud 84 and being attached to floor panel 72. Aperture or
cutout 88 is formed in one wall of holder or shroud 84 to allow the heater
and temperature control unit 90 to operatively engage container or vat 82.
Power and control cable 92 is operatively connected between circuitry in
control box 38 and the heater and temperature control unit 90. Heat sensor
94 is positioned in container or vat 82 such that the heat sensor 94 is
covered with cooking oil 96. Heat sensor 94 is held in position by clip or
keeper 98 which attaches to the corner of container or vat 82 and holder
or shroud 84 and holds the capillary tubing 100 in position against the
wall of container or vat 82. Capillary tubing 100 is operatively connected
between heat sensor 94 and circuitry within control box 38.
With reference to FIG. 3 cooking basket 104 is generally rectangular in
shape and formed of predetermined lengths of wire. Handles 106, one
embodiment, are formed as part of the wire forming the periphery of the
open or top portion of the cooking basket 104. Cooking basket 104 is
shaped to be placed or rested in the cooking oil 96 contained in container
or vat 82. Insulation material 108 is formed around each handle 106 so the
cooking basket 104 may be handled without the operator/employee's hand or
hands being burned. It will be appreciated that cooking basket 104 could
be essentially one-half the size shown in FIG. 3 such that two separate
cooking baskets 104, with only one handle 106 on each cooking basket 104,
could be used to prepare smaller portions of food, either simultaneously
or at different times.
With reference to FIGS. 2 and 4, the means for holding cooking basket 104
and automatically lowering the cooking basket 104 down into the cooking
oil 96 for a predetemined time and then raising the cooking basket 104 out
of the cooking oil 96 is disclosed. Shaft 170 is positioned across and
near the front of holder or shroud 84 and is supported for rotational
movement of fifteen to thirty degrees. One end of shaft 170 is inserted in
coupler 172 and retained therein by fastening means 174. The opposite end
of shaft 170 is supported by a bearing journal (not shown) attached either
to floor panel 72 or side panel 64. Attached at predetermined locations
along shaft 170 (by conventional means such as welding) are handle guides
and holders 176 which include a handle guide and support portion 178 and a
handle stop portion 180. For ease of explanation, the particular
embodiment of handle 106 is shown as having three distinct sections: first
section 182, second section 184 and third section 186. Shaft 170 and
attached handle guides and holders 176 are shown in the position which
places basket 104 down into the cooking oil 96. First section 182 is
placed in the handle guide and support portion 178 (which comprises a
U-shaped channel section) until end portion 188 of first section 182
protudes below handle stop portion 180. Handle stop portion 180 comprises
a U-shaped portion with the open section being positioned under shaft 170.
With reference to FIG. 4, cooking basket 104 produces a clockwise torque
with respect to handle guides and holders 176 which is offset by handle
stop portion 180 (which prevents end portion 188 from rotating clockwise)
and handle guide and support portion 178 (which prevents first section 182
from moving or rotating clockwise). The cooking basket 104 is positioned
by and follows the rotational movement of shaft 170. When the cooking
basket 104 is positioned down into the cooking oil 96, as shown in FIG. 4,
.theta. is approximately 15 to 20 degrees and represents the approximate
angle from the vertical of first section 182.
To remove the weight of the cooking basket 104 a | | |