Patent ID: 7637206
Filing Date: 2009-12-29
Classification: A47J

Abstract:
1. A domestic food pressure cooking appliance comprising a bowl provided with a side wall and a lid which can be positioned and locked on said bowl, said lid and side wall co-operating, when the lid is positioned and locked on the bowl, to define an annular interstitial space having an initial cross section having a predetermined radial dimension, termed the initial dimension, said interstitial space being intended to receive an annular gasket designed to be interposed between the side wall and the lid to produce a cooking vessel that is substantially leaktight, wherein the bowl, the lid, and the gasket are designed so that when the pressure inside the vessel reaches a predetermined critical safety value, the interstitial space at least locally has a critical cross section having a predetermined radial dimension, termed the critical dimension, which is greater than the initial dimension, wherein the side wall extends vertically between a base and an upper opening in a manner that diverges from the base to the upper opening and is flared outwardly throughout its extent in the zone defining the interstitial space, so that the difference between the initial dimension and the critical dimension is sufficiently great for the leaktight contact between the gasket and the side wall and/or the lid to be broken, thus causing decompression of the vessel.