Airtight adapter and a replacement method therefor

Abstract

An airtight adapter to be mounted to an airtight unit requiring airtightness, e.g. a glove box, with which it is possible to easily replace a part of the airtight adapter while maintaining airtightness. The adapter has an outer-cylinder adapter body, an internal adapter body inserted into and fitted in the outer-cylinder adapter body and at least two annular sealing members positioned between the internal adapter body and the outer-cylinder adapter body. By determining a length of the outer-cylinder adapter body and positions of the sealing members, the internal adapter body can be easily, airtightly replaced by bringing a spare internal adapter body into contact with the already-fitted internal adapter body at the outside of the airtight unit; pushing and inserting the spare internal adapter body into the cylinder of the outer-cylinder adapter body while moving the already-fitted internal adapter body toward the inside of the airtight unit; securing the spare internal adapter body at a predetermined position in the cylinder of the outer-cylinder adapter body.

Dependencies are inferred from the claim text.