Patent ID: 7270020
Filing Date: 2007-09-18
Classification: G01N,Y10T

Abstract:
1. An instrument assembly comprising: a sample introduction port coupled to an analysis chamber, the sample introduction port being configured to receive a sample for analysis; a valve between the sample introduction port and the analysis chamber; a cam coupled to the valve, wherein the cam is rotatably mounted to the sample introduction port, the cam comprises a first end extending to a second end, the first end being both rotatably mounted to the sample introduction port and coupled to the valve, wherein the first end of the cam comprises a surface, the surface comprising an opening configured to receive a portion of the valve; the cam is configured to rotate about an axis, and the opening of the surface comprises a groove, the groove extending in a radial arc offset from the axis; and the instrument being configured to automatically rotate the cam about the axis upon occurrence of a predefined event.