DE2547449A1 - PRESSURE VESSELS, IN PARTICULAR STEAM PRESSURE COOKERS - Google Patents

Description

j / 16870

ί. Oct 21, 1975

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Gruber & Kaja die casting and metal goods factory in w ie η

Pressure vessel, in particular pressure cooker

The invention relates to a pressure vessel, in particular a pressure cooker, consisting of a container with arranged on its edge cams and a cover with inwardly projecting tabs, which the cams of the The container engaging behind with this form a bayonet catch, which by turning the lid in one direction in his

The closed position can be brought, with the cams of the container or the tabs of the lid being a closing surface, a safety surface and have a catch. Such pressure vessels are about from the CH-PS 538 845 or DT-OS 2 455 735 known. In these known pressure vessels when the container is under pressure, the

If the cover is rotated in the opening direction, a stop surface of the tab or the cam strikes the catch, which prevents further rotation of the cover until the pressure is applied

Is degraded in the container *

709819/0030

The disadvantage of these known pressure vessels is that the protection formed by the catch against premature opening only works if the catch is completely overrun during the closing process. Will however such a pressure vessel closed only so far that when the catch is arranged on the cam, only the underside of the Catching lug of the individual cams with the lid tabs or, if the catching lug is arranged on the tab, only the top of the Catching lug is engaged with the cam of the container, the saucepan can be brought under pressure. One so flawed sealed and pressurized container can easily be opened by a short twisting movement, without first a pressure reduction can take place.

The object of the invention is to provide measures for the cited pressure vessels by which the pressure vessel can only go under pressure if it is properly closed. this will usually be the case when the handles of the container and the lid to stand on top of each other korans. Furthermore should In addition, a safeguard against premature opening of pressurized vessels must be provided.

According to the invention, this is achieved in that at least one catch is provided only on the cam of the container or tab of the lid located in a sector of at most 120 °. Preferably, at most two cams or tabs, preferably only a single cam or a single tab, are provided with a catch.

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If now, with the arrangement of the catch on a cam, the container is only closed so far that the one Catching lug is in engagement with the corresponding lid flap, the container cannot be pressurized, since the lid is still open internally, the area opposite the catch, so that no pressure can build up. Will on the other hand, if the container is properly closed and under pressure, the lid moves in the opening direction, when the catch is arranged on the cam, the one with the closing surface hits of the cam disengaging tabs with a stop surface against the catch. In this situation is through the steam pressure of the rag is pressed against the safety surface of the cam and the steam pressure can be reduced. To When the pressure is reduced, the lid falls back on the pot part and the container can be opened by turning it further. One The same functionality is achieved if the catch is arranged on the flap.

According to the invention it is thus achieved in a simple manner that the container is only in the properly closed state can be pressurized. Although the catch is preferably only provided on a cam or a tab the object of the invention is also achieved if only on the cam located in a sector of at most 120 ° or at least one catch tab is provided. It is essential that over the largest possible range of the No catches provided on the edge of the lid or container

Il I

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are, so that when the container is not completely closed no seal can be made between the lid and the container edge.

The invention will now be explained in more detail with reference to the drawings. The drawings show: FIG. 1 a front view of a pressure cooker according to the invention with a partially broken lid edge;

FIG. 2 shows a view of part of the bayonet lock of the saucepan according to FIG. 1 during the opening process; FIG.

3 shows a view of the bayonet lock of the saucepan according to FIG. 1 at the beginning of the closing process and

Fig. 4 is a view of a bayonet lock, in which the catching nose is arranged on the cover flap.

The saucepan according to the drawings has a container 1 and a lid 5. On the upper edge of the container 1 are cams 2 and on the edge of the lid 5 are inwardly directed Tab 6 provided. The cams 2 and the tabs 6 form a bayonet lock. The cams 2 are stepped and have a closing surface 7 and a safety surface 8. The saucepan has eight cams 2 on its container edge and eight tabs 6 on its lid edge. One of the eight cams 2 is then attached a downwardly directed catch 4 is provided on the safety surface.

In Fig. 1, the saucepan is shown in the properly closed state. In this position the closing surface 7 covered by the flap 6. If the lid 5 is now at a

709819/0030

2547443

properly closed saucepan in opening direction rotated, the flap 6 is pressed by the steam pressure acting on the cover 5 into the gap 3, in which Position of the tabs 6 includes the safety surface 8 of the cam 2 and the steam can flow out of the container 1 (see Fig. 2). Further turning of the cover 5 is only possible when the bottom of the tab 6 descends below the lower surface of the catch.

From Fig. 3 the position of a cam 2 provided with a catch 4 is shown at the beginning of the closing process. It can be seen that in the position of the lid and container shown in FIG. 3, the saucepan is pressurized could if several over the edge circumference distributed Nocke.n 2 would be provided with a catch. According to the invention, however, are only a cam 2 or only in "a sector of at most 120 ° Provide the cam with a catch 4. As a result, in the position shown in FIG. 3, the pressure cooker cannot fall Pressure go, because in the area opposite the cam 2 with the catch 4, the edge of the cover with the seal lifts off from the container edge by tilting the cover 5.

In Fig. 4 an embodiment is shown in which the catch 4 ^{1 is arranged} on the tab 6 ', which has a closing surface 7' and a safety surface 8 '. In the position shown in FIG. 4, the pressure ^{vessel is properly closed, since the closing surface 7 1 of} the tab rests against the cam 2 'of the container. With the embodiment of FIG. 4 is in a manner analogous to the example of the

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Fig. 1-3 achieves that the saucepan is now properly locked state can go under pressure, but at the same time a security against premature opening of a still under pressure is given.

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Claims (2)

Patent claims: 1.] Pressure vessel, in particular pressure cooker, consisting of a container with arranged on its edge Cams and a lid with inwardly projecting tabs that engage behind the cams of the container with these form a bayonet catch which can be brought into its closed position by rotating the cover in one direction, wherein Cams of the container or tabs of the lid have a closing surface, a safety surface and a catch, characterized in that only on the cam of the container or lobe located in a sector of at most 120 ° of the lid at least one catch nose is provided. 2. Pressure cooker according to claim 1, characterized in that that at most two cams or lobes, preferably only a single cam or a single lobe with one Catch nose are provided. 709819/0030