Abstract: There is provided a novel dual functioning, dual metal safety release valve for a pressure cooker. This valve comprises a metallic retainer member having a bore therein in which is held a fusible metal alloy. The metallic retainer is held in a suspended manner loosely in an opening in the lid of the pressure cooker contrary to the conventional manner in which the said release valve is sealingly fitted to the pressure cooker. The safety release valve is held at a specific angle and is so fabricated that when the pressure cooker is in operation, the safety release valve remains in suspended condition in the opening of the lid of the cooker, thereby letting air to escape first and when substantially all the air has escaped, the developing steam pressure forces the safety release valve upwards and a sealing of the opening in the lid of the cooker is achieved.

Abstract: In and for a pressure cooker having an open mouth vessel and a lid which can be sealingly fitted to the mouth of the vessel, a pressure regulating valve fitted to the lid of the vessel comprises a vent tube and a vent weight which vent weight is adapted to be seated over the mouth of the vent tube, said vent tube having a downwardly extending pin to slide into a bore of the head of the vent tube, the vent weight having one or more openings for the escape of the steam when the vent weight is lifted. The vent weight is held by a fulcrumed lever having a passage exposed at one end to the atmosphere and at the other end cooperating with the said openings of the vent weight. The bore or passage of the vent tube is larger in diameter than the said bore or mouth of the vent tube on which the said pin of the vent weight seats. The bore or passage of the vent tube opens into a frusto conical section whose lower end has a diameter larger than that of its upper end.

Abstract: In and for a pressure cooker having an open mouth vessel and a lid which can be sealingly fitted to the mouth of the vessel, a pressure regulating valve fitted to the lid of the vessel comprises a vent tube and a vent weight which vent weight is adapted to be seated over the mouth of the vent tube, said vent tube having a downwardly extending pin to slide into a bore of the head of the vent tube, the vent weight having one or more openings for the escape of the steam when the vent weight is lifted, the vent weight being held by a fulcrumed lever having a passage exposed at one end to the atmosphere and at the other end cooperating with the said openings of the vent weight, the bore or passage of the vent tube being larger in diameter than the said bore or mouth of the vent tube on which the said pin of the vent weight seats, the said pressure regulating valve capable of being manually and automatically operated.