Receptacles – Closures – Having means for securing or retaining closure in its closed...
Patent
1996-04-24
1997-10-21
Simone, Timothy F.
Receptacles
Closures
Having means for securing or retaining closure in its closed...
99337, 99403, 220203, 220293, A47J 2708, A47J 2709, B65D 4500, B65D 4534
Patent
active
056787219
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to the general technical field of locking/unlocking devices for a cover of a container to form a cooking vessel, preferably of the pressure type.
The present invention concerns a locking/unlocking device for a cover of a cooking vessel, preferably under pressure, comprising at least two jaws mounted to be radially movable in opposition to one another on the cover between a locking position of the cover and an unlocking position as well as a means for controlling the movement of the jaws in a manner to cause them to assure one or the other of the fixed positions of locking or unlocking.
PRIOR ART
There is already known, according to patent application WO-92/03083 a pressure cooking vessel using a locking/unlocking device composed of jaws which are mounted for radial movement on the cover. The jaws, of which there are two, are diametrically opposite one another relative to the longitudinal axis of the vessel and are adapted such that when in their closing position they tightly grip the peripheral edge of the container in order to hermetically seal the vessel. Conversely, the jaws can occupy an unlocking position permitting opening of the vessel. Control of the displacement of the jaws is assured by a control means, which is a button mounted to move axially on the cover in a central position. The control means is provided with engagement surfaces which are specially shaped to act, during displacement of the control button, on inclined surfaces fixed to the jaws in order to displace them radially. Such a control system thus transforms, in a conventional manner, an axial movement into a radial displacement movement of the jaws between a closing position and an opening position.
It can be considered that such a device represents a positive contribution to systems for locking vessels in a closed position for pressure cooking, particularly because it does not require a relatively precise positioning such as indexing, between the cover and the container. On the other hand, such a system has been found to require a series of pieces which are movable relative to one another, and in particular radially, to assure control of disengagement of the jaws. The arrangements proposed imply combinations of complex movements, such as translations and rotations, provoking risks of significant jamming and leading to high fabrication costs and a less than optimum operating reliability.
It is equally in order to note that the control mechanism of the above-described device, as well as the relative displacements of the various parts, requires a relatively substantial physical effort on the part of the user.
Moreover, the prior art device does not comprise a system which permits assuring that the jaws are in a perfect locking position, or consequently of detecting that the vessel is correctly closed. It can in effect occur that for reasons of partial blockage or of defective displacement of the jaws or of the pieces assuring their movement, the jaws only assure a partial locking of the cover on the container. It being a matter of a vessel under pressure, detection of a complete and correct closing of the jaws is thus of a major importance for the safety of the user.
SUMMARY OF THE INVENTION
The object of the present invention is in consequence to provide a remedy to the various difficulties enumerated previously, and to provide a new locking/unlocking device for a pressure vessel permitting assurance in a simple and reliable manner of the good position of the jaws and of the complete and certain closing of the cover on the container.
Another object of the invention is to furnish a new locking/unlocking device in which the displacement of the jaws is particularly facilitated while being robust and simple.
Another object of the invention is to provide a new locking/unlocking device whose overall rigidity and assembly are improved.
Another object of the invention is to provide a novel locking/unlocking device in which the jaws are permanently brought into the locking position.
The obj
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Cartigny Michel
Chameroy Eric
Seb S.A.
Simone Timothy F.
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