US Patent 7523696 Pressure-cooking appliance including opening safety means

The invention relates to an appliance for cooking under pressure, the appliance comprising:a bowl and a lid; andopening safety means suitable for going between a neutral position, in which they allow the lid to be unlocked, and a blocking position, in which they prevent the lid from being unlocked, said safety means being designed to find themselves in the blocking position when the pressure prevailing inside the vessel is greater than or equal to a predetermined value or “rise pressure”, and/or when the temperature prevailing inside the vessel is greater than or equal to a predetermined value or “rise temperature”;