Patent ID: 6644124
Filing Date: 2003-11-11
Classification: G01L

Abstract:
A test assembly comprising:a casing having a valve received therein and a piston movably received in the casing, the valve having a main passage defined longitudinally therethrough and defining an opening in a first end of the valve, a radial passage defined radially through the valve and communicating with the main passage, a sub-passage defined in the valve and in parallel with the main passage, the sub-passage communicating with the radial passage and opening to the first end of the valve, a threaded hole defined radially in the valve and a gauge connected to the threaded hole; a flexible seal film securely mounted to the first end of the valve and having two apertures defined therethrough, one of the two apertures located in alignment with the sub-passage, and a control member having a knob and a shank which is inserted through the casing and received in the radial passage in the valve, a first path defined radially through the shank and communicating with the main passage, a second path defined radially in the shank and terminated at a half way of the shank, the first path communicating with the second path and an angle defined between two respective axes of the first path and the second path, the second path being sealed by an inner periphery of the radial passage when the control member being located at a first position, the second path communicating with the sub-passage when the control member being located at a second position.