Patent ID: 7316730
Filing Date: 2008-01-08
Classification: G01N

Abstract:
1. An inlet seal assembly for sealing an injection port member in a gas chromatography instrument, comprising an injection port member having a bottom surface with a raised metal ring, an inlet seal member with an upper surface, a peripheral groove formed in the upper surface of the inlet seal member, a soft ring made of resinous plastic material positioned in the peripheral groove of the inlet seal member opposite the raised metal sealing ring of the injection port member, a reducing nut holding the inlet seal member against the injection port member, thread means connecting the reducing nut to the injection port member, and a seal formed by the soft ring of the inlet seal member pressing against the raised metal ring of the injection port member when the reducing nut is tightened on to the injection port member via the thread means to cause the soft ring of the inlet seal member to press against the raised metal sealing ring of the injection port member.