Patent ID: 8820220

Claim:
A pressure vessel comprising: a pot-like receptacle, a lid for placing thereon, the receptacle and the lid being detachably locked together by peripheral locking segments of a bayonet catch, and a circumferential sealing ring made of elastically yielding material located in a region of a circular edge of the lid and a circular edge of the receptacle to seal an interior of the receptacle in a locked position of the receptacle and the lid against a drop in pressure, wherein the sealing ring includes sealing lips in contact with the edge of the lid and the edge of the receptacle to provide an automatic pressure-control mechanism, wherein the sealing ring is formed over at least one circumferential portion of a circumference of the sealing ring such that the sealing ring is deformed, under a pressure inside the vessel which exceeds a predetermined pressure, so as to form a venting gap between the receptacle and the lid, wherein, in the circumferential portion of the sealing ring, at least the sealing lip associated with the edge of the receptacle is reduced or tapered at a continuous circumferential sealing surface of the sealing lip, wherein the sealing ring is provided with at least one pressure-release pocket opening towards the interior of the vessel, such that when the pressure inside the vessel is below the predetermined pressure, the sealing lip associated with the edge of the receptacle rests from the inside against the edge of the receptacle and when the predetermined pressure is exceeded, the sealing lip is displaced radially outwards and downwards into an intermediate space between the edge of the lid and the edge of the receptacle so as to rest from the outside against the edge of the receptacle, wherein a spine of the sealing ring is supported against a continuous circular-cylindrical peripheral portion of the edge of the lid which is bent downwards from a body of the lid so as to provide the sealing ring with an all-round support so that the pressure-release function is solely determined by the deformation and displacement of the sealing lip associated with the edge of the receptacle.