| 摘要 |
A tilt action mixing valve having a tiltable valve stem with an upper hollow portion and a side opening at a midway point, constituting a discharge passage. Below the side opening is a valve shoulder, engageable with an annular valve seat through which the hollow stem portion extends, for the purpose of shutting off the flow from within a tubular valve housing to the top of which the annular seat is sealed. The valve housing has two inlet openings, and is mounted at the top of a rigid outer container whose interior communicates with one of said openings. At its bottom the valve housing has the other opening, which communicates with a flexible, collapsible inner container having a different liquid from the outer container. At its inner end the said other opening has a valve seat, in the bottom housing wall, which is engaged by the bottom, solid end of the valve stem to control flow from the inner container into the housing. Tilting of the valve stem permits such flow. Surrounding the valve shoulder of the stem is a flexible seal skirt or cylinder constituting part of the housing. With the stem not tilted, this skirt seals to the shoulder and isolates the two inlet openings from each other. Tilting of the stem unseats both the stem shoulder and the stem bottom, and unseals the skirt from the shoulder. Pressurized liquid then flows from the two containers into the valve housing and out through the upper hollow portion of the stem, with mixing occurring only within the stem hollow portion. There is no mixing chamber as such, within the valve housing, and therefore no mixed residue remains, after a discharge, within the valve housing.
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