WO2020226586A1

WO2020226586A1 - A gasket for pressure vessels

Info

Publication number: WO2020226586A1
Application number: PCT/TR2019/051267
Authority: WO
Inventors: Faruk YILMAZ
Original assignee: Alpi̇n Çeli̇k Mutfak Gereçleri̇ Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇
Priority date: 2019-05-09
Filing date: 2019-12-31
Publication date: 2020-11-12
Also published as: TR201906998A2

Abstract

The present invention is a gasket (1) that ensures to reduce pressure contained inside pressure cookers and similar pressure vessels in a non-hazardous manner, provides tightness up to a certain degree between the lid (10) and the body (20) of a pressure vessel utilized for cooking and boiling purposes and prevents the pressure occurrence at a dangerous level inside the vessel by releasing air in case of pressure increase and ensures safety by releasing the air characterized in that; it comprises corrugated surfaces (6) having parabolic slopes that are positioned on inner surfaces of lower extension (2) and upper extension (4), and in which section thicknesses of said lower extension (2) and upper extension (4) are increased and decreased in a homogeneous manner for the purpose of reducing elastic deformation resistance; and a plurality of attenuated surfaces (7) which are created on the outer surface of the gasket (1) at portions in which section thicknesses of lower extension (2) and upper extension (4) are low, and reduce elastic deformation resistance thereof.

Description

A GASKET FOR PRESSURE VESSELS

Technical Field of the Invention

The present invention relates to a gasket that provides tightness up to a certain pressure amount between the lid and the body of the pressure vessel utilized for cooking and boiling purposes in order to lower the pressure contained in pressure cookers and similar pressure vessels in a non- hazardous manner.

State of the Art

Nowadays, gaskets are utilized in order to provide air tightness between the lid and the body of pressure cookers and similar pressure vessels. These gaskets prevent the pressure contained inside the body from decreasing by preventing air passage between lids and bodies. However, exceeding of pressure contained inside the body over a certain degree has become an undesired condition with the advancements in technology. Therefore, it is ensured that gaskets retain the pressure inside the body of the vessel up to a certain degree, and in case the pressure exceeds the desired level, air within the body is reduced, thereby stabilizing pressure. The present invention relates to a gasket that is capable of retaining pressure up to a certain degree.

Gaskets utilized in the state of the art allow for performing depressurization by means of single stage attenuation. However, since this operation is performed only through a certain portion of the gasket, this may result in deformation at that specific portion. Moreover, only a specific geometrical shape is thinned out by being attenuated on gasket surface in available systems, and this thinning operation may result in laceration and the surface that works in an elastic manner during use, may shorten the physical life span of the gasket by only using said attenuated areas without utilizing any other surface thereof. However, attenuation surfaces are created gradually by means of the present invention subject to the description provided herein, and the fact that the surface has a continuously gradual structure ensures that deformed area receives support from peripheral areas thereof, and it is thus aimed to extend the physical life of the gasket.

A utility model document numbered TR2013/07115 was identified following the researches made in the literature, wherein said document discloses; "The present invention relates to a pressure cooker gasket that is mounted on pressure cooker lids, wherein said gasket provides better tightness by expanding upon getting into contact with heat, thereby enlarging the diameter thereof and maintains its position by being mounted on the stainless lower lid through shrink fit connection . "

In said utility model numbered TR 2013/07115, a gasket that is capable of retaining pressure up to a certain degree is not mentioned. Said document discloses only a gasket having improved tightness capabilities.

In consequence thereof, a gasket is required, whereby the state of the art is surpassed, and disadvantages thereof are eliminated . Brief Description of the Invention

The present invention relates to a gasket having additional features, whereby the state of the art is surpassed, and disadvantages thereof are eliminated.

The object of the present invention is to provide a novel gasket that is capable of retaining pressure contained inside the body up to a certain degree and of enabling release of air inside the body by being deformed upon reaching a certain degree .

Another object of the present invention is to provide a novel gasket that does not allow pressure to exceed a certain degree by being deformed in a homogeneous manner at different portions through a number of attenuated and corrugated surfaces .

Yet another object of the present invention is to provide a novel gasket in which deformation areas are homogeneously distributed by being deformed not only in a single portion but also in many different portions, thereby preventing laceration and similar problems from being experienced and thus, allowing the inventive gasket to have an extended physical life of use.

In order to accomplish all objects both mentioned above, the present invention, as it will become evident through the detailed description provided below, is a gasket that ensures pressure contained inside pressure cookers and similar pressure vessels is reduced in a non-hazardous manner, provides tightness up to a certain degree between the lid and the body of a pressure vessel utilized for cooking and boiling purposes and prevents pressure from exceeding a specific level by means of releasing air in case of pressure increase characterized in that; it comprises, corrugated surfaces having parabolic slopes that are positioned on inner surfaces of lower extension and upper extension, and in which section thicknesses of said lower extension and upper extension are increased and decreased in a homogeneous manner for the purpose of reducing elastic deformation resistance; and a plurality of attenuated surfaces which are created on the outer surface of the gasket at portions in which section thicknesses of lower extension and upper extension are low, and reduce elastic deformation resistance.

Another characteristic of the present invention is that attenuated surface comes into contact with the inner surface of the lid by performing reverse camber (expressed as receiving pressure at the inner surface of the gasket in the arrow direction in Figure 6) movement so as to fill the gap (B) between the attenuated surface and the lid in case of pressure increase inside the body.

Another characteristic of the present invention is that lower end breaks contact with the orifice of the body once the attenuated surface comes into contact with the inner surface of the lid and lower extension becomes deformed by folding at the corrugated surface in which wall thickness is low, thereby releasing the pressure contained inside the body.

Description of the Figures

The present invention is disclosed by making references to annexed figures, thus the characteristics of the present invention will be understood more clearly. Nevertheless, the aim thereof is not limiting or restricting the present invention with specific embodiments. On the contrary, it is hereby aimed that the present invention involves all alternatives, changes and equivalents that may be included in the scope defined by annexed patent claims. It should be understood that details provided herein are disclosed only for the purpose of describing preferred embodiments of the present invention and of providing best practicable and easily understandable definition for embodying both methods, principles and conceptual characteristics of the present invention. In said figures;

FIGURE 1 illustrates the perspective view of the inventive gasket .

FIGURE 2A illustrates the sectional view including attenuated surface and corrugated surface of the inventive gasket .

FIGURE 2B illustrates the sectional view taken from the portion that does not contain attenuates surface of the inventive gasket.

FIGURE 3 illustrates the lateral section view of the inventive gasket .

FIGURE 4 illustrates the section view taken from the portion that does not include attenuated surface, but in which the inventive gasket retains pressure between a lid and a body.

FIGURE 5 illustrates the section view taken from the portion where the inventive gasket includes attenuated surface and retains pressure between a lid and a body .

FIGURE 6 illustrates the section view in which the inventive gasket releases the pressure between a lid and a body .

As drawings that aid in understanding of the present invention provided in the annexed figures, they are also enumerated and provided below together with respective references. Description of the References

1. Gasket

2. Lower Extension

3. Lower End

4. Upper Extension

5. Upper End

6. Corrugated Surface

7. Attenuated Surface

10. Lid

20. Body

B . Gap

Description of the Invention

In the detailed description provided herein, the inventive gasket (1) is illustrated with examples only to ensure a better understanding of the subject and without constituting any limiting or restricting effects. In the detailed description provided herein, a gasket (1) is disclosed that ensures to reduce the pressure contained inside pressure cookers and similar pressure vessels, allows for reducing the pressure contained inside pressure cookers and similar pressure vessels in a non-hazardous manner, provides tightness up to a certain pressure amount between the lid (10) and the body (20) of a pressure vessel utilized for cooking and boiling purposes, prevents pressure from exceeding a determined pressure value by means of releasing air in case of pressure increase.

The present invention is manufactured from a flexible material and positioned between a body (20) and a lid (10) . Air passages are blocked in a way to ensure that lower end (3) corresponds to the annular orifice portion of the body (20) and the upper end (5) corresponds to the inner ring of the lid (10) . The lid (10) and the body (20) are interlocked by means of a locking method, thereby aiming for achieving the tightness of the vessel and retaining pressure as a result of locking of the body (20) by compressing the gasket (1) through the orifice of the body (20) and the inner surface of the lid (10) . It is ensured that feature of retaining pressure disappears by creating gradual deformation on a specific pressure by means of surficial changes and attenuations performed on the gasket (1) in order to ensure safety due to pressure increase. Thus, pressure contained inside the body (20) cannot exceed a specific level.

Figure 1 illustrates the perspective view of the inventive gasket (1) . Accordingly, gasket (1) is an element of which lower extension (2) comes into contact with the body (20), and upper extension (4) comes into contact with the lid (10), and that retains pressure inside the body (20) by providing tightness. The gasket (1) comprises a plurality of attenuated surfaces (7) positioned at certain intervals. Said attenuated surfaces (7) allow the deformation of the gasket over a specific pressure value by reducing wall thickness of the gasket (1) . Being positioned between the lid (10) and the body (20), gasket (1) is created to have a structure that allows for being compressed and rotated by means of the annular shape and elasticity thereof, and for being demounted when desired. In spite of the fact that the gasket (1) is positioned on the upper lid (10), it has no deformation at the position in which it is placed, and comprises an upper end (5) that ensures the tightness of the lid (10) by coming into contact with the inner surface of the lid (10) in a complete and smooth manner. In this case, subsequent to operation in which the lid (10) is mounted on to the body (20), gasket's (1) lower end (3) which corresponds to the body (20) portion, comes into contact with the orifice of the body (20) in an airtight manner.

Figure 2B illustrates the sectional view taken from the portion in which the inventive gasket (1) does not comprise attenuated surfaces (7), whereas, Figure 2A illustrates the section view taken from the portion in which the inventive gasket (1) comprises attenuated surfaces (7) . Accordingly, the gasket (1) comprises a plurality of attenuated surfaces (7) arranged on the outer surface thereof. The gasket (1) also comprises corrugated surfaces (6) which are arranged so as to increase and decrease wall thicknesses of inner surfaces of the lower extension (2) and the upper extension (4) .

Attenuated surface (7) is located on the outer surface of the gasket (1) in portions where wall thickness of corrugated surfaces (6) are low. (Figure 2B) These areas reduced the resistance against elastic deformation by means of both the decrease in section thickness of lower extension (2) and upper extension (4) originating from the corrugated surface (6) and the decrease in section thickness of the gasket (1) along with the attenuated surface (7) . Gasket (1) may be exposed to elastic deformation by means of the corrugated surface (6) and attenuated surfaces (7) thereof. Lower extension (2) and upper extension (4) section thicknesses are high in portions where the gasket (1) does not contain attenuated surfaces (7) .

(Figure 2A) These portions are resistant to elastic deformation .

Figure 3 illustrates the lateral section view of the inventive gasket (1) . Accordingly, the gasket (1) is seen more clearly in lateral section view with corrugated surface (6) located on the inner surface of lower extension (2) and upper extension

(4) thereof. The corrugated surface (6) located herein increases and decreases section thickness of the lower extension (2) and the upper extension (4) . Portions in which section thickness decreases are portions where the elastic deformation resistance of the gasket (1) is low.

Figure 4 illustrates the sectional view taken to correspond to a portion where the inventive gasket (1) does not comprise attenuated surface (7), and in which the inventive gasket (1) is positioned between a lid (10) and a body (20) . Here, lower extension (2) and upper extension (4) have higher wall thicknesses. Therefore, these areas have high elastic deformation resistance. Here, the gasket (1) is in pressure retention position. Figure 5 illustrates the section view taken such that it corresponds to the portion where the gasket (1) comprises attenuated surface (7), and in which the inventive gasket (1) is positioned between the lid (10) and the body (20) . Lower end (3) of the gasket (1) coincides with the orifice of the body (20), while the upper end (5) thereof coincides with the inner surface of the lid (10) . A gap (B) is located between the attenuated surface (7) of the gasket (1) and the inner surface of the lid (10) . In this phase, gasket (1) retains the pressure contained within the body (20) . Accordingly, the gasket (1), along with the attenuated surface (7) and corrugated surfaces (6) thereof, comprises portions in which wall thicknesses of lower extension (2) and upper extension (4) are reduced. Elastic deformation resistance is reduced in these portions of the gasket (1) . When a pressure increase occurs inside the body (20), the gasket (1) is exposed to elastic deformation by means of the attenuated surface (7) and the corrugated surface (6), accordingly, pressure is decreased by releasing the air contained inside the body (20), thereby releasing the pressure contained inside the body (20) and preventing the pressure from reaching a value that may pose any dangers. Figure 6 illustrates the view in which the inventive gasket (1) is exposed to deformation. When the pressure contained inside the body (20) increases and reaches to a determined pressure value, attenuated surface (7) of the gasket (1) becomes deformed so as to fill the gap (B) as illustrated in Figure 6 and comes into contact with the inner surface of the lid (10) . In this case, contact between the lower end (3) of the lower extension (2) and the orifice of the body (20), as well as the contact between the upper end (5) of the upper extension (4) and inner surface of the lid (10) are interrupted. Section thickness of the lower extension (2) is reduced in connection with the corrugated surface (6) . Therefore, lower extension (2) allows air release from the body (20) in the arrow direction by being exposed to elastic deformation. Thus, the pressure contained inside the body (20) is prevented from exceeding a determined level. Since corrugated surface (6) and attenuated surfaces (7) are homogeneously distributed to inner and outer surfaces of the gasket (1) in the present invention, laceration or similar permanent deformation do not occur, thereby extending the physical life of the gasket (1) .

Subsequently, reutilization should be ensured by seating the lid (10) on to the body (20) after the pressure inside the body (20) is released and the lid (10) is removed in order to reuse the vessel in a manner in which it may continue retaining pressure. Thus, the deformation of the gasket (1) is eliminated and returns it to its previous form.

Claims

1- A gasket (1) that ensures to reduce the pressure contained inside pressure cookers and similar pressure vessels, allows for reducing the pressure contained inside pressure cookers and similar pressure vessels in a non-hazardous manner, provides tightness up to a certain pressure amount between lid (10) and body (20) of a pressure vessel utilized for cooking and boiling purposes, and allows for keeping below a certain level by means of releasing air in case of pressure increase characterized in that; it comprises;

corrugated surfaces (6) having parabolic slopes that are positioned on inner surfaces of lower extension (2) and upper extension (4), and in which section thicknesses of said lower extension (2) and upper extension (6) are increased and decreased in a homogeneous manner for the purpose of reducing elastic deformation resistance;

and a plurality of attenuated surfaces (7) which are created on the outer surface of gasket (1) at portions in which section thicknesses of lower extension (2) and upper extension (4) are low and reduce elastic deformation resistance.

2- A gasket (1) according to Claim 1 characterized in that, attenuated surface (7) comes into contact with the inner surface of lid (10) by performing reverse camber movement so as to fill the gap (B) between attenuated surface (7) and lid (10) in case of pressure increase inside body (20) .

3- A gasket (1) according to Claim 1 characterized in that, lower end (3) breaks contact with orifice of body (20) once attenuated surface (7) comes into contact with the inner surface of lid (10) and lower extension (2) becomes deformed by folding at corrugated surface (6) in which wall thickness is low, thereby releasing the pressure contained inside body (20) .

4- A gasket (1) according to Claim 1 characterized in that, attenuated surfaces (7) and corrugated surfaces (6) are positioned to inner and outer surface of gasket (1) in a homogenous manner.