Patent ID: 7624674

Claim:
A household appliance for cooking under pressure, the appliance comprising a cooking bowl and a lid designed to be locked onto the bowl so as to make it possible for the pressure inside the appliance to be increased, said appliance being provided with at least one calibrated opening and bistable calibrated air leakage means arranged and configured to be positionable between an open position in which the pressure inside the appliance is allowed to increase continuously to above a determined pressure P 0 , while also allowing air to be bled from the appliance through said opening, and a closed position corresponding to an absence of leakage of air to the outside, said open position being sustained for at least one of a predetermined time interval Δt after reaching a pressure value P 0 , the predetermined time interval Δt after reaching a temperature value T 0 corresponding to the pressure value P 0 , until a predetermined pressure value P 1 is reached, and until a predetermined temperature value T 1 is reached, where P 1 >P 0 , and T 1 >T 0 , said appliance being provided with a closure/opening safety means whose position is sensitive to the pressure prevailing in the bowl, and which is mounted to move between two stable abutment positions, namely a first position in which said closure/opening safety means puts the inside of the bowl into communication with the outside below the determined pressure P 0 , and a second position in which said closure/opening safety means prevent opening of the appliance and close off communication from the bowl to the outside when the pressure P 0 is reached, so as to allow the pressure inside the appliance to increase and so as to allow cooking to take place.