Pressure vessel
A pressure vessel includes a pot-like receptacle and a lid for placing thereon, the two being detachably locked together and including a circumferential sealing ring made of elastically yielding material which is located in the region of a circular edge of the lid and a circular edge of the pot for the purpose of sealing the interior against a drop in pressure. Sealing lips of the sealing ring come into close contact with the edge of the lid and the edge of the receptacle, in which case, for producing an automatic pressure-control mechanism, the sealing ring is formed over at least one portion of its circumference in such a way that it is deformed, under a pressure inside the vessel which exceeds a given value (response pressure), so as to form a venting gap between the receptacle and the lid.
1. 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.
2. A pressure vessel according to claim 1 , wherein, below the predetermined pressure inside the vessel, the sealing lip associated with the edge of the receptacle contacts an inside of a transitional portion of the edge of the receptacle and extends towards a side of the receptacle, and,
wherein upon exceeding the predetermined pressure inside the vessel the sealing lip is displaced outwards such that the sealing lip rests on an outer peripheral region of the edge of the receptacle and intermittently lifts off or slides off from the outer peripheral region of the edge of the receptacle to release the pressure.
3. A pressure vessel according to claim 1 , wherein at least the sealing lip associated with the edge of the receptacle merges into a spine of the sealing ring via an indented region which is tapered or reduced relative to a thickness of the sealing lips and extends over the entire circumference of the sealing ring.
4. A pressure vessel according to claim 1 , wherein a plurality of circumferential portions with pressure-release pockets are provided,
wherein the circumferential portions are located in the sealing lip associated with the edge of the lid and/or the edge of the receptacle and are evenly distributed over the circumference of the sealing ring.
5. A pressure vessel according to claim 4 , wherein circumferential portions with pressure-release pockets of the sealing lip associated with the edge of the lid are staggered in the circumferential direction relative to the circumferential portions with pressure-release pockets of the sealing lip associated with the edge of the receptacle.
6. A pressure vessel according to claim 1 , wherein the sealing ring is mirror-symmetrical relative to a horizontal median plane of the sealing ring.
7. A pressure vessel according to claim 1 , wherein a structure of the sealing ring is rotationally symmetrical.
8. A pressure vessel according to claim 1 , wherein an outer geometry of the sealing ring is adapted to an inside surface of the lid.
9. A pressure vessel according to claim 1 , wherein a plurality of circumferential portions with pressure-release pockets are provided over the circumference of the sealing ring.
10. A pressure vessel according to claim 9 , wherein a respective circumferential portion with a pressure-release pocket is located between two adjacent peripheral locking segments of the lid.
11. A pressure vessel according to claim 9 , wherein at least one circumferential portion with a pressure-release pocket is located in each intermediate space between two adjacent peripheral locking segments of the lid.
12. A pressure vessel according to claim 1 , wherein at least one of a form and a material composition of the sealing ring is adapted in terms of at least one of a basic shape, radius, width, height and depth of the at least one pressure-release pocket and a hardness of a material of a spine of the sealing ring and/or of the sealing lips to set the predetermined pressure.
13. A pressure vessel according to claim 1 , wherein the circumferential sealing ring comprises rubber or plastic.