WO1996026663A1

WO1996026663A1 - Highly insulated cooking utensil

Info

Publication number: WO1996026663A1
Application number: PCT/GR1996/000006
Authority: WO
Inventors: Dimitrios Vagourdis
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-01
Filing date: 1996-03-01
Publication date: 1996-09-06
Anticipated expiration: 1997-09-01
Also published as: GR1002305B; AU4729696A; EP0758860A1; CA2188999A1

Abstract

With the use of the double or multiple insulated walls of the cylinders (2, 3) and others, the insulating layers (4 and 5) and of the void (6) of the parts of the lid (9 and 11), the insulating coating (10 and 12) of the void space (13), we may increase the heat insulating properties of the highly insulated cooking utensil, which are further enhanced with the use of the flexible heat insulating custom extension (24), which bears a projection (27) and several small protrusions (28), with the custom extension consisting of two metallic disks (37 and 38) with a void space (40) and the cover made of thin plastic (42 and 43), glasswool (44) and an elastic band (46) and the use of the empty cylinder of a height (47) and a diameter (48) which protects the steam pressure valve (15). The joints of the cylinders are made with two compact joints along their circumference or one compact joint and one or two gaskets.

Description

HIGHLY INSULATED COOKING UTENSIL

The invention refers to cooking utensils in general; cooking utensils lose in a short time a large part of their heat energy, leaking from their external surfaces, i.e. their base, their walls and their lid. As a result, more heat input and longer cooking times are required, resulting in a higher cost of cooking.

Furthermore, the heat released to the environment is often undesired, especially during warm days.

The invention of the highly insulated cooking utensil aims at the minimisation of energy consumption during cooking. Furthermore, when the energy supply, be it electricity, gas or any other, is interrupted, the heat remains captured within the highly insulated cooking utensil and cooking is continued at a lower cost and more hygienically.

The invention, illustrated in Drawing 1, consists of the base

(1) which extends to the cylindrical wall (2) and the coaxial to it cylindrical wall (3), where the cylindrical wall (2) is externally coated with a heat insulating layer (4) . The cylindrical wall (3) is internally coated with a heat insulating layer (5) . The thickness of the base (1) and of the cylindrical walls (2) and (3) are the same as for common cooking utensils. They can be metallic or made of other physical or artificial material. The walls (2) and

(3) are spaced apart of each other by about fifteen millimetres, and the two heat insulating layers (4) and (5) are spaced apart by 2 to 3 millimetres, forming a void space (6) .

A hole (7) is located at the upper part of the cylinder (3), used for thinning down the air in the void space. The hole can be tightly closed with a screw (8), thus increasing heat insulation.

By adding one or several similar cylinders, externally to the cylinder (3), double, triple or multiple insulation can be achieved.

Significant quantities of heat also escape from the lid. For minimising heat losses, the lid is manufactured as illustrated in Drawing 2.

The lid is round, or can have a different shape and is made of metal or other natural or artificial material. Its thickness is similar to that of common cooking utensils.

One part (9) of the lid bears an external heat insulating layer (10), whereas the other part of it (11) bears an internal heat insulating layer (12). Parts (9) and (10) of the lid are spaced apart of each other by six to seven millimetres and a void space of two to three millimetres is formed between the heat insulating layers. A handle (14) is fitted onto the lid and a steam pressure valve can optionally be added on it.

The handles (16) and (17) of drawing 1 are reinforced with metal or other materials (18) and (19) for high rigidity. The handle (14) of Drawing 2 is also reinforced at the point (20), in the same manner.

The two cylinders (2) and (3) of Drawing 1 are solidly welded at their circumference at the positions (21) and (22), and the two walls of the lid (9) and (11) - Drawing 1 - are also joined along their circumference (23) .

A custom extension, Drawing 3, can be added to the highly insulated cooking utensil. This consists of a flexible heat insulating material (24) of a thickness of five millimetres and of a rectangular shape, of a length (25) equal to the external circumference of the cylinder (3), and of a width (26) equal to the height of the cylinder (3) . This material bears an internal projection of a height of about three millimetres (27) and various interspersed protrusions (28) of the same material and of the same height.

The custom extension of drawing 3 surrounds the cylinder (3), its two sides (29) and (30) being adjacent to each other and fastening at the positions (31), (32) and (33) with the positions

(34), (35) and (36) respectively, thus increasing the heat insulation and the boiling time.

For avoiding heat losses from the base (1), Drawing 1, another custom extension is manufactured, Drawing 4. This consist of two coaxial metallic disks (37) and (38) made of cast iron or other natural or artificial material, each having a thickness of six to seven millimetres, joined at their circumference (39) so that a void space (40) of a thickness of six to seven millimetres exists between them.

For increased rigidity, the disks (37) and (38) are joined at their centre (41) .

Thus, following boiling the custom extension of Drawing 4 is positioned onto the heat source, and the highly insulated cooking utensil is positioned on top of the custom extension.

For a short while, boiling continues, so that the custom extension of Drawing 4 is heated up, and then the heat supply is interrupted, whereas boiling will continue for a considerable time period. By positioning the custom extension of Drawing 4, boiling ti es are extended. Such times are further extended by positioning the custom extension of Drawing 5 which consists of a cover consisting of two thin plastic coatings (42) and (43), resistant to high temperatures and safe for the health. The two coatings have glasswool or other heat insulating material (44) of a thickness of two centimetres positioned between them, joined at their lower circumference (45) where a heat resistant elastic band (46) exists and is tightened at the circumference of the lower part of the external cylinder (3).

In the case where a steam pressure valve (15) of Drawing 2 exists; this valve is protected from the possible pressure of the cover with the custom extension of Drawing 6, which is a metallic cylinder, internally void, of a height (47) of about three centimetres larger than the protruding height of the pressure valve (15) and a diameter of the void (48) about three centimetres larger than the diameter of the steam pressure valve (15), for protecting it from the pressure of the cover. The custom extension bears holes

(49) on its walls for the possible outlet of the steam. All the materials used can be metallic, plastic, elastic, withstanding high temperatures and suitable for hygiene purposes. Furthermore, the custom extensions of drawings 3, 4, 5, and 6 can also be used with any common cooing utensil.

Furthermore, the cylinder (3) and the other external cylinders can be permanently fixed by construction or may have a fixed joint at the circumference (21), whereas the joint at the circumference (22) may be replaced with a circular plastic or rubber gasket , or both joints (21) and (22) may be replaced with two circular rubber gaskets.

Claims

1. A highly insulated cooking utensil which consists of the base (1), the cylinder (2), a lid and, optionally, a steam pressure valve (15) and is characterised by that the side cylindrical walls are made of two cylinders (2) and (3) or more, rigidly connected along their circumference (21) and (22), coaxially, the inner one (2) bearing an external heat insulation layer (4), whereas the one immediately next to it (3) bears an internal heat insulation (5) leaving a void space (6), the air of which can be thinned down via the hole (7) which can be tightly closed with a screw (8); the highly insulated cooking utensil also bears a lid with twin walls (9) and (11), joined along their circumference (23) which bear heat insulating layers (10) and (12) and a void space (13) between the heat insulation layers, optionally a steam pressure valve (15), where such cooking utensil aims at capturing the heat for long times; the joints (21) and (22) along the circumference of the cylinders (2) and (3) can be replaced with two circular rubber gaskets, or, alternatively a peripheral joint (21) may exist and the joint (22) can be replaced by a circular rubber or plastic gasket.

2. A highly insulated cooking utensil according to claim 1, characterised by that it increases the heat insulation with the use of a custom extension made of flexible heat insulating material (24), such custom extension bearing an internal protrusion along its circumference (27), interspersed small protrusions (28) and fastening positions (31), (32), (33), (34), (35), (36) and surrounding externally the wall of the cylinder (3), increasing its heat insulation capabilities.

3. A highly insulated cooking utensil according to claims 1 and 2, characterised by that for avoiding heat losses from the base(2) a custom extension is used, where such custom extension consists of two coaxial metallic disks (37) and (38) joined along their circumference (39) with a void space between each other (40) and with a reinforcement (41).

4. A highly insulated cooking utensil which is characterised by that, according to claims 1, 2 and 3, it is fitted with a twin - layered (42) and (43) cover, resistant to high temperatures and safe for hygienic purposes, featuring a glasswool or other insulating material coating (44), joined at its circumference and bearing an elastic band (46) for tight closing of the highly insulated cooking utensil externally.

5. A highly insulated cooking utensil according to claims 1, 2, 3 and 4, characterised by that it may accommodate a custom extension of a void cylinder of a height (47) and a diameter (48) which bears holes (49) and aims at protecting the steam pressure valve (15) from the cover.

6. A highly insulated cooking utensil according to claims 1, 2, 3, 4, 5 which is characterised by that the cylinder (3) or the other cylinders attached can by construction permanently fixed to or they can be screwed in a different manner onto the cylinder (2), thus replacing the peripheral joinc (22) with a circular rubber gasket or the two peripheral joints (21) and (22) with two circular elastic gaskets.

7. A highly insulated cooking utensil according to claims 1, 2, 3, 4, 5 and 6 which is characterised by that all the custom extensions can be used accordingly to any common cooking utensil and by that the materials can be metallic, plastic or made of other natural material or combination of materials, where such materials are safe hygienically, can assume different dimensions and shapes, withstand high temperatures, moisture and longevity of use.