WO2007123353A1

WO2007123353A1 - Frying pan having stainless steel plate

Info

Publication number: WO2007123353A1
Application number: PCT/KR2007/001980
Authority: WO
Inventors: Jung-Suk Jung; Wan-Ho Son
Original assignee: Jung-Suk Jung; Wan-Ho Son
Priority date: 2006-04-24
Filing date: 2007-04-24
Publication date: 2007-11-01

Abstract

A frying pan used for cooking food has a stainless steel plate integrally attached thereto. The stainless steel plate is formed integrally on the inner bottom surface and/or the outer bottom surface of the frying pan in order to protect a coating of the frying pan from damage as well as to prevent food from sticking to the frying pan. The frying pan also has a Teflon coating formed on an inner surface thereof; and a stainless steel plate having a plurality of through holes formed therein and integrally pressed onto a bottom surface of the Teflon-coated inner surface. The stainless steel plate is formed to protrude to a thickness thereof from the bottom surface of the inner surface of the frying pan.

Description

[DESCRIPTION]

[invention Title]

FRYING PAN HAVING STAINLESS STEEL PLATE

[Technical Field]

The present invention relates to a frying pan that is commonly used in kitchens in everyday life, and more particularly, to a frying pan having a stainless steel plate integrally attached thereto, in which the stainless steel plate can prevent stripping of a Teflon coating from the bottom surface of the frying pan, so that the frying pan can be used hygienically and with a prolonged lifetime.

The present invention also relates to a frying pan having stainless steel plates integrally attached thereto, in which the stainless steel plates are formed integrally on the inner and outer bottom surfaces of the frying pan in order to protect the coating of the frying pan from damage as well as to prevent food from sticking to the frying pan.

[Background Art]

Conventional frying pans commonly used in kitchens are generally coated with Teflon on the inner bottom surface thereof to prevent food from sticking to the inner bottom surface in order to ensure convenient and hygienic use. While the Teflon-coated frying pans should be rubbed with a soft dishcloth to clean food stuck thereto, some kitchen workers may use a coarse scrubber or the like to rub the bottom surface.

The frying pans may still be used as intended even after being rubbed with coarse scrubbers. However, if the frying pans are rubbed with coarse scrubbers for a long time, about six months, the Teflon coating can be stripped off.

The entire inner surface of such a conventional frying pan is coated only with Teflon, and thus Teflon particles stripped off due to frequent use may be absorbed into the human body, which may cause health problems .

[Disclosure] [Technical Problem] The present invention has been made to solve the foregoing problems of the prior art, and therefore an object of certain embodiments of the present invention is to provide a frying pan having a stainless steel plate integrally attached thereto, in which the stainless steel plate can protect a Teflon coating of the frying pan from the influence of washing after cooking, thereby increasing the lifespan of the frying pan, and can be stably used once attached to the frying pan, and an induction heater can be used to heat the frying pan for cooking. Another object of certain embodiments of the present invention is to provide a frying pan having a stainless steel plate integrally attached thereto, in which the stainless steel plate is pressed onto the inner bottom surface of the frying pan, with protrusions having a thickness corresponding to the thickness of the stainless steel plate in order to protect a Teflon coating from be stripped, thereby preventing food from sticking to the frying pan when cooking.

A further object of certain embodiments of the present invention is to provide a frying pan having a stainless steel plate integrally attached thereto, the stainless steel plate being made of STS 439 steel, which is improved in machinability, corrosion resistance and thermal endurance and cheaper than STS 304 or 430 steel, in order to save manufacturing costs and increase the lifespan of the frying pan, and is securely attached to the frying pan so as not to be detached therefrom.

Yet another object of certain embodiments of the present invention is to provide a frying pan having a stainless steel plate integrally attached thereto, in which stainless steel plates are pressed onto the inner and outer bottom surfaces of the frying pan to ensure excellent thermal conduction, and prevent any deformation caused by heat or stress corrosion, which otherwise may take place when the frying pan is used for a long time.

[Technical Solution] According to an aspect of the invention for realizing the object thereof, the invention provides a frying pan including: a handle attached to one portion thereof; a Teflon coating formed on an inner surface thereof; and a stainless steel plate seated on and pressed onto an inner bottom surface thereof, the stainless steel plate having a plurality of through holes formed therein and insert protrusions each protruding from an outer circumference of each of the through holes, wherein protrusions in the inner bottom surface of the frying pan fill the through holes of the stainless steel plate, thereby making the inner bottom surface of the frying pan planar.

According to another aspect of the invention for realizing the object thereof, the invention provides a frying pan including: a Teflon coating formed on an inner surface thereof; and a stainless steel plate having a plurality of through holes formed therein and integrally pressed onto a bottom surface of the Teflon-coated inner surface, wherein the stainless steel plate is formed to protrude a thickness t thereof from the bottom surface of the inner surface of the frying pan.

Preferably, the frying pan may further include a second stainless steel plate integrally pressed onto an outer bottom surface of the frying pan, the second stainless steel plate protruding to a thickness t thereof from the outer bottom surface of the frying pan.

Preferably, the stainless steel plate may have protrusions around outer peripheries of the through holes, each of the protrusions having a periphery decreasing from top to bottom.

Preferably, the stainless steel plate is STS 439 steel .

[Advantageous Effects]

According to the frying pan having a stainless steel plate integrally attached thereto, the Teflon coating of the frying pan is not influenced by washing after cooking, and thus can be used for a longer time. The stainless steel plate can be stably used once attached to the frying pan, and an induction heater can be used to heat the frying pan for cooking .

According to the frying pan having a stainless steel plate integrally attached thereto, the stainless steel plate is pressed onto the inner bottom surface of the frying pan, with protrusions having a thickness corresponding to the thickness of the stainless steel plate, so that food and cooking tools do not directly contact the Teflon coating, in order to protect the Teflon coating from be stripped. Thus, the frying pan can be used hygienicalIy since food does not stick to the frying pan when cooking, and Teflon is not taken up by the human body. The protrusions also distribute heat and ensure that food is heated uniformly, without gathering in one portion of the frying pan and food consequently being partially cooked. Furthermore, according to the frying pan having a stainless steel plate integrally attached thereto, the stainless steel plate is made of STS 439 steel, which is improved in machinability, corrosion resistance and thermal endurance and cheaper than STS 304 or 430 steel, in order to reduce manufacturing costs and increase the lifespan of the frying pan.

[Description of Drawings] FIG. 1 is a perspective view illustrating a frying pan having a stainless steel plate integrally attached thereto according to an exemplary embodiment of the present invention;

FIG. 2 is an exploded, enlarged sectional view illustrating an important part of the frying pan shown in

FIG. 1, in a state prior to being assembled;

FIG. 3 is an exploded, enlarged sectional view illustrating the important part of the frying pan shown in

FIG. 2, in an assembled state; FIG. 4 is an exploded perspective view illustrating a frying pan having a stainless steel plate integrally attached thereto according to another exemplary embodiment of the present invention;

FIG. 5 is a front elevational view and an exploded, enlarged fragmentary view illustrating the frying pan shown in FIG. 4; FIG. 6 is an exploded, enlarged fragmentary view illustrating the stainless steel plate of the frying pan shown in FIG. 4;

FIG. 7 is an exploded perspective view illustrating the frying pan having a stainless steel plate integrally attached thereto according to a further exemplary embodiment of the present invention; and

FIG. 8 is a front elevational view and an exploded, enlarged fragmentary view illustrating the frying pan shown in FIG. 7.

[Best Mode]

Exemplary embodiments of a frying pan having a stainless steel plate integrally attached thereto according to the present invention will now be described in detail with reference to the accompanying drawings .

FIG. 1 is a perspective view illustrating a frying pan having a stainless steel plate integrally attached thereto according to an exemplary embodiment of the present invention, FIG. 2 is an exploded, enlarged sectional view illustrating an important part of the frying pan shown in FIG. 1, in a position prior to being assembled, FIG. 3 is an exploded, enlarged sectional view illustrating the important part of the frying pan shown in FIG. 2, in an assembled position, FIG. 4 is an exploded perspective view illustrating a frying pan having a stainless steel plate integrally attached thereto according to another exemplary embodiment of the present invention, FIG. 5 is a front elevational view and an exploded, enlarged fragmentary view illustrating the frying pan shown in FIG. 4, FIG. 6 is an exploded, enlarged fragmentary view illustrating the stainless steel plate of the frying pan shown in FIG. 4, FIG. 7 is an exploded perspective view illustrating the frying pan having a stainless steel plate integrally attached thereto according to a further exemplary embodiment of the present invention, and FIG. 8 is a front elevational view and an exploded, enlarged fragmentary view illustrating the frying pan shown in FIG. 7.

First, with reference to FIGS. 1 to 3, a description will be made of a frying pan 1 having a stainless steel plate integrally attached thereto according to an exemplary embodiment of the present invention. The frying pan 1 of this embodiment of the invention has a handle attached to one portion thereof, and is coated with Teflon on the inner surface thereof . A steel plate 2 is seated on the inner bottom surface of the frying pan 1, and is perforated with a plurality of through holes 4. Each of insert protrusions 3 protrudes from the outer circumference of each of the through holes 4. The frying pan 1 is pressed so that protrusions 5 in the inner bottom surface of the frying pan 1 fill the through holes 4 of the stainless steel plate 2, thereby making the inner bottom surface of the frying pan 1 planar.

The frying pan 1 is made of a Teflon-coated material, and is fabricated by pressing the stainless steel plate 2, which is perforated with the through holes having a preset diameter, onto the inner bottom surface of the frying pan 1. In detail, the stainless steel plate 2 is seated on the inner bottom surface of the frying pan 1 so that the insert protrusions 3, which are formed in the outer periphery of the through holes 4 during the punching of the through holes 4, are positioned at the bottom. Then, the metal stainless plate 2 is pressed onto the frying pan 1 with a hydraulic press having a load of about 1,000 t, so that the metal stainless plate 2 penetrates into and bonds with the frying pan 1, since the metal stainless plate 2 is harder than the frying pan 1 made of Al.

In this embodiment of the present invention, the stainless steel plate 2 and the frying pan 1 have bonding areas corresponding in number to the number of the through holes 4. Thus, the stainless steel plate 2 can be securely bonded to the frying pan 1 without being separated therefrom for a long time. According to this embodiment of the invention, the stainless steel plate 2 is integrally provided in a large area of the bottom surface of the frying pan 1, where food most frequently sticks . When the frying pan 1 is cleaned, the area of the Teflon coating that is rubbed is decreased, thereby reducing resultant stripping, so that the coating can be maintained for a longer time. Therefore, the frying pan 1 can be used for twice as long as a conventional frying pan.

In addition, the conventional frying pan is not conductive, and thus cannot be used on an induction heater (i.e., a stove that becomes conductive and generates heat when a conductor is placed on the stove) since the conventional frying pan does not interact with the induction heater. However, when the frying pan 1 of this embodiment of the invention is placed on the induction heater, the stainless steel plate 2 attracts a magnet, which is hidden in the induction heater to act as a switch, thereby allowing heat conduction from the induction heater. Thus, it is possible to cook with the frying pan 1 placed on the induction heater. Next, with reference to FIGS. 4 and 5, a description will be made of a frying pan having a stainless steel plate integrally attached thereto according to another exemplary embodiment of the invention. A frying pan 100 is Teflon coated on an inner surface thereof, and a stainless steel plate 200, which has a plurality of through holes 210, is pressed onto the inner bottom surface 110 of the frying pan 100. The stainless steel plate 200, pressed onto the frying pan 100, protrudes to a thickness t thereof from the inner bottom surface 110 of the frying pan 100. With the stainless steel plate 200 having the through holes 210 attached to the frying pan 100 so as to protrude from the inner bottom surface 110 of the frying pan 100, it is possible to minimize the stripping of the Teflon coating, which occurs when the frying pan 100 is used for a long time. In addition, in the case of cooking food, oil or moisture can be uniformly distributed by recesses 130 formed in the through holes 210 owing to the height difference between the stainless steel plate 200 and the inner bottom surface 110 of the frying pan 100. This, as a result, distributes heat while ensuring that food is heated uniformly without heat being concentrated in one portion of the frying pan 100.

In addition, FIG. 6 is an exploded, enlarged fragmentary cross-sectional view of the stainless steel plate of the frying pan according to this embodiment of the invention. Protrusions 230 are formed in the outer periphery of the through holes 210 of the stainless steel plate 200, so that the stainless steel plate 200 can be securely bonded to the inner bottom surface 110 of the frying pan 100. Each of the protrusions 230 is tapered, with the periphery decreasing from the upper end to the lower end of the through holes 210 of the stainless steel plate 200, so that the stainless steel plate 200 can be securely bonded with the frying pan 100.

The stainless steel plate 200 is preferably implemented with STS 439 steel. STS 439 steel has improved machinability, corrosion resistance and thermal endurance compared to those of STS 304 or STS 430 steel. Thus, STS 439 steel is easily machinable, and can increase the lifespan of the frying pan 100. Due to the high strength thereof, STS 439 steel can form a strong bonding force between the stainless steel plate 200 and the frying pan 100. In addition, STS 439 steel is inexpensive in comparison to STS 304 or STS 430 steel, and thus is economically advantageous. Furthermore, an excellent surface gloss can advantageously produce an attractive and clean appearance.

The chemical components and mechanical strengths of

STS 304, 430 and 439 steels are reported for comparison in Table 1 below:

[Table l]

Note)

YS*: Yield Strength

TS* : Tensile Strength

Now, a frying pan having a stainless steel plate integrally attached thereto according to a further embodiment of the invention will be described with reference to FIGS . 7 and 8.

As shown in FIG. 7, in the frying pan 100 according to this embodiment of the invention, a stainless steel plate 200a, perforated with a plurality through holes 210a, is pressed onto the outer bottom surface of the frying pan 100. In more detail, in addition to a stainless steel plate 200 pressed onto the inner bottom surface 110, the stainless steel plate 200a is pressed onto the outer bottom surface 120 in such a fashion that it protrudes to the thickness t of the stainless steel plate 200. In addition, the structure and the material of the stainless steel plate 200a, including tapers 220a and protrusions 230a, are the same as the stainless steel plate 200 pressed onto the inner bottom surface 110 of the frying pan 100, as described above.

In greater detail, with the stainless steel plate 200a, which is made of STS 439 steel and perforated with the through holes 210a, pressed onto the outer bottom surface 120 of the frying pan 100, it is possible to conveniently cook, due to excellent heat conductivity. It is also possible to prevent thermal deformation of the frying pan 100, which may take place upon use for a long time. Furthermore, due to these material characteristics, it is possible to prevent stress corrosion cracks in the frying pan 100, thereby significantly prolonging the useful life thereof . While the present invention has been described with reference to the particular illustrative embodiments and the accompanying drawings, it is not to be limited thereto, but will be defined by the appended claims. It is to be appreciated that those skilled in the art can substitute, change or modify the embodiments into various forms without departing from the scope and spirit of the present invention.

[industrial Applicability]

According to the present invention, as set forth above, a frying pan, which is commonly used in kitchens in everyday life, has a stainless steel plate integrally attached thereto, the stainless steel plate preventing stripping of a Teflon coating from the bottom surface of the frying pan, so that the frying pan can be used hygienicalIy and has an increased lifespan.

Furthermore, the frying pan of the present invention also has stainless steel plates integrally attached thereto, the stainless steel plates being formed integrally on the inner and outer bottom surfaces of the frying pan in order to protect the coating of the frying pan from damage as well as to prevent food from sticking to the frying pan.

Claims

[CLAIMS] [Claim 1]

A frying pan, comprising: a handle attached to one portion thereof; a Teflon coating formed on an inner surface thereof; and a stainless steel plate seated on and pressed onto an inner bottom surface thereof, the stainless steel plate having a plurality of through holes formed therein and insert protrusions, each protruding from an outer circumference of each of the through holes, wherein protrusions in the inner bottom surface of the frying pan fill the through holes of the stainless steel plate, thereby making the inner bottom surface of the frying pan planar.

[Claim2]

A frying pan comprising: a Teflon coating formed on an inner surface thereof; and a stainless steel plate having a plurality of through holes formed therein and integrally pressed onto a bottom surface of the Teflon-coated inner surface, wherein the stainless steel plate is formed to protrude to a thickness thereof from the bottom surface of the inner surface of the frying pan.

[Claim3]

The frying pan according to claim 2, further comprising a second stainless steel plate integrally- pressed onto an outer bottom surface of the frying pan, the second stainless steel plate protruding to a thickness thereof from the outer bottom surface of the frying pan.

[Claim4]

The frying pan according to claim 2 or 3, wherein the stainless steel plate has protrusions around outer peripheries of the through holes, each of the protrusions having a periphery decreasing from top to bottom.

[Claim5]

The frying pan according to claim 4, wherein the stainless steel plate comprises STS 439 steel.