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AssigneeSge Analytical Science Pty Ltd
InventorsBrett Russell Barnett, Peter Alexander Dawes
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A ferrule arrangement for use in sealing connections to gas chromatography columns includes a generally tubular metal ferrule with an axial bore to receive a fracturable column with a protective coating. The ferrule has a forward part that tapers to a tip region of the ferrule. A generally tubular former has a socket portion to receive the ferrule and further has an internal conical surface that, after such receipt, engages the forward part of the ferrule. A portion is provided on either or both of said ferrule and the former by which the ferrule and former may be directly or indirectly relatively moved together by application of finger force. The taper and the internal conical surface exhibit relative taper angles and the tip region of the ferrule is sufficiently radially thin whereby the application of finger force (i) is adequate to move the ferrule axially into the former to cause the conical surface to engage the tip region of the ferrule and to deform the tip region into sealing engagement with the protective coating of the column, but (ii) does not break the column.
A ferrule arrangement for use in sealing connections to gas chromatography columns, comprising:
A ferrule for use in sealing connections to gas chromatography columns, comprising a generally tubular metal body with an axial bore to receive a fracturable column with a protective coating, which ferrule has a rearward part of larger outer diameter and an intermediate part of lesser outer diameter than the rearward part, and a forward part of outer diameter less than the rearward and intermediate parts that tapers to a tip region of said ferrule that is deformable into sealing engagement with the protective coating of the capillary column on being deformed by a former surface against which the ferrule is pushed by direct or indirect finger movement of the rearward part.
Dependencies are inferred from the claim text.