Method of assemblying a sealed structure

Details Method of assemblying a sealed structure Method of assemblying a sealed structure

G - Physics

01

N

73/79

G01N 19/04 (2006.01)

Patent

CA 1154281

A METHOD OF ASSEMBLYING A SEALED STRUCTURE ABSTRACT OF THE DISCLOSURE A method of connecting a first shell to a second shell to establish a unitary sealed structure. A bead of a diaphragm assembly is connected to a first peripheral surface on the first shell to establish a first sealing surface and to define a first chamber between the diaphragm assembly and the first shell. A spring attached to the diaphragm assembly engages the second shell. A force applied to the second shell compresses the spring to bring a second peripheral surface therein into engagement with the bead on the diaphragm to establish a second sealing surface and define a second chamber between the diaphragm assembly and the second shell. A vacuum evacuates air from the first and second chambers to establish a pressure differential between the first and second chambers and the surrounding environment. This pressure differential acts on the first and second shells to urge the first and second peripheral surfaces against the diaphragm to establish a unitary structure. Thereafter, the force applied to hold the first and second shells together is removed and the relationship between the first and second sealing surfaces is observed for a fixed time period. Should air from the surrounding environment enter into either the first or second chamber, the pressure differential is sufficiently reduced to allow the spring to separate the first and second shells to indicate a non- conformity between the first and second shells and the diaphragm. If the first and second shells remain together during the fixed time period, the first and second peripheral surfaces are thereafter crimped together to establish the unitary sealed structure.

403812

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