| 摘要 |
An improved poppet valve constructed having a lower member partially mating and fitting within an upper portion is constructed in the shape of a top hat, and with the lower member having a formed shoulder upon which a gasket seats, and being biased thereagainst by means of the flanged upper portion of the valve, with a spring forcing these various components, including the gasket, against the valve seat of the body of the dispenser. An aperture is formed through the base member of the valve, and opens into that location between this base member and the upper portion of the poppet valve, thereby effectively venting any encapsulated air located between these two components, or to prevent the development of any vacuum therein.
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