Seal for gas chromatography
First Claim
1. A seal forming a fluid tight connection between a gas chromatography column and a sample inlet assembly, said sample inlet assembly comprising a conduit, said seal comprising:
- a sintered metal powder plate in an annealed state and having a surface finish with randomly oriented irregularities for conforming with a mating surface, said plate having a first surface on one side engageable with said conduit, said plate having a second surface on an opposite side engageable with said column; and
an aperture extending through said plate between said first and second surfaces, said aperture positioned to provide fluid communication between said column and said sample inlet assembly.
1 Assignment
0 Petitions
Accused Products
Abstract
A seal forming a fluid tight connection between a gas chromatography column and a sample inlet assembly is disclosed. The seal is formed by a metal injection molding process. The seal has a first surface adapted for sealing with the sample inlet assembly and a second surface adapted for sealing with the column. The seal has an aperture extending between the first and second surfaces. A method of sealing a connection between a gas chromatography sample inlet assembly and a gas chromatography column is also disclosed. The method includes providing a seal as described above, compressing the first surface of the seal against an end of the inlet assembly, positioning the column in fluid communication with the aperture, and engaging the column with the second surface.
38 Citations
22 Claims
-
1. A seal forming a fluid tight connection between a gas chromatography column and a sample inlet assembly, said sample inlet assembly comprising a conduit, said seal comprising:
-
a sintered metal powder plate in an annealed state and having a surface finish with randomly oriented irregularities for conforming with a mating surface, said plate having a first surface on one side engageable with said conduit, said plate having a second surface on an opposite side engageable with said column; and an aperture extending through said plate between said first and second surfaces, said aperture positioned to provide fluid communication between said column and said sample inlet assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A gas chromatography sample inlet assembly connectable to a gas chromatography column, said inlet assembly comprising:
-
a shell having a shell bore; a liner having a liner bore, said liner being positioned within said shell bore, a first space being positioned between said liner and said shell; an injector port in fluid communication with said liner bore; a vent port in fluid communication with said first space between said liner and said shell; a sintered metal powder plate in an annealed state and having a surface finish with randomly oriented irregularities for conforming with a mating surface, said plate having a first surface on one side engageable with an end of said shell, said plate having a second surface on an opposite side engageable with an end of said column; a second space positioned between said liner and said plate, said second space providing fluid communication between said liner bore and said first space; and an aperture extending through said plate between said first and second surfaces, said aperture sized to receive said end of said column therein and provide fluid communication between said column and said liner bore. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A method of sealing a connection between a gas chromatography sample inlet assembly and a gas chromatography column, said inlet assembly having a conduit, said method comprising:
-
providing a seal, said seal comprising a sintered metal powder plate in an annealed state and having a surface finish with randomly oriented irregularities for conforming with a mating surface, said plate having a first surface on one side engageable with an end of said conduit and a second surface on an opposite side engageable with said column, said plate having an aperture extending therethrough between said first and second surfaces providing fluid communication between said conduit and said column; compressing said first surface of said seal against said end of said conduit; positioning said column in fluid communication with said aperture; and engaging said column with said second surface.
-
Specification