The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 1996
Filed:
Mar. 18, 1994
Alfred R Schenker, Norristoen, PA (US);
Luken W Potts, Merion, PA (US);
VIZ Manufacturing Co, Philadelphia, PA (US);
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.