| 摘要 |
Dispensing valve unit (12) has a stationary inner tubular assembly (22), a telescopically shiftable outer tubular assembly (24) and an inner dual valve assembly. Inner assembly (22) has a soap entry port (54), whereas outer assembly (24) has an opening (92) registrable with port (54). A cam mechanis m (40, 80) effects axial shifting of outer assembly (24) relative to inner assembly (22) upon rotation. Outer assembly (24) is shiftable so that unit (12) may assume three different positions: a soap and low low volume water delivery position wherein opening (92) is in registry with port (54) so that soap is drawn from an annular reservoir (112), and valve body (26) is shifte d to permit controlled water flow therethrough so that soap and water are mixe d for dispensing; a high volume water-only rinse position where valve body (26 ) is shifted from shoulder (48) and portion (90) covers the port (54); and an all-off position where valve body (26) engages shoulder (48) and prevents water flow through the valve body (26), and the portion (90) covers the port (54).
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