Patent ID: 6926178
Filing Date: 2005-08-09
Classification: A61P,B65D

Abstract:
1. A valve comprising: a body; a stem having a dispensing passage, and a first sealing ring including a first rigid component and a first flexible component, wherein the stem is slidably moveable relative to the first sealing ring from a closed position to an open position, and wherein a portion of the first flexible component is positioned between the first rigid component and the stem, said valve further including a second sealing ring, wherein the body defines a metering chamber and a sampling chamber, wherein, in the closed position, the dispensing passage is isolated from the metering chamber and the metering chamber is in communication with the sampling chamber via a transfer passage, wherein, in the open position, the dispensing passage is in communication with the metering chamber and the transfer passage is isolated from the metering chamber, and wherein the second sealing ring includes a second rigid component and a second flexible component.