US Patent 8096436 Pressure cooker with overpressure safety device

The invention relates to a pressure cooking appliance (1) having:a bowl (2) with a side wall (2B),a lid (3),a sealing gasket (4) interposed between the side wall (2B) and the lid (3),said appliance (1) being designed so that, when the pressure inside the chamber reaches a predetermined safety value, the gasket (4) moves up to reach a safety position, said appliance (1) being characterized in that the side wall (2B) comprises a geometrical irregularity (10) intended to interact with the gasket (4) when the latter is located at the predetermined safety position thereof so as to interrupt the contact between the gasket (4) and the side wall (2B).