Patent ID: 6494082
Filing Date: 2002-12-17
Classification: G01M

Abstract:
An airtightness testing device intended for a closed space equipped with a steam movement control device for controlling steam movement between two ventilation holes, one of which holes communicates to an interior of the closed space and the other of which holes opens to atmospheric air, and between which holes multiple chambers are separated by water proof membranes which are permeable to air and water vapor, the device comprising:a closed space connection part including a double tube having an inner tube forming an air feed passage on which a gas injection device to supply gas at a specified pressure is connected and having an outer tube forming an air exhaust passage on which a pressure gauge is mounted, both of which passages communicate to the interior of the closed space, the inner tube protruding from the end of the outer tube so that the openings of the inner tube and the outer tube stand off with respect to each other, the closed space connection part connecting in a detachable manner to a connection hole formed on the closed space.