Apparatus for sealing a vessel under pressure

Details Apparatus for sealing a vessel under pressure Apparatus for sealing a vessel under pressure

1994-03-18

1996-10-22

Scherbel, David

Receptacles

High-pressure-gas tank

220201, 215263, 280741, F17C 100, B60R 2128

Patent

active

055668534

ABSTRACT:
An apparatus and method for sealing a vessel or capsule under pressure comprises a preferred embodiment closure feature provided on a closure plate or metal wall to be sealed. The closure feature comprises a raised symmetrical protrusion having a small diameter elongated capillary aperture extending completely therethrough. The exposed end of the raised protrusion is heated by rodless welding to a molten state after filling the associated vessel. Then the exposed end of the cylindrical protrusion is allowed to cool while the surface tension of the metal in a molten state forms a convex bubble shape which completely closes the capillary in the exposed end of the cylindrical protrusion and maintains the heat affected zone from progressing radially outward where cracks could occur.

REFERENCES:
patent: 2449186 (1948-09-01), Wales
patent: 4513873 (1985-04-01), Klaschka
patent: 4690295 (1987-09-01), Wills
patent: 4949862 (1990-08-01), Barbarits
patent: 5078422 (1992-01-01), Hamiton
patent: 5158740 (1992-10-01), Boatwright
patent: 5303277 (1994-04-01), Yaginuma

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