Mixing valve for two resilient feed ducts - uses inflation of one duct by fluid to open other duct

摘要

The mixing valve comprises a first resilient duct (S1) locally constricted by a pressure member (D). A second resilient duct (S2) runs parallel to the first duct before merging with it. A leaf spring (B) extending upstream from the pressure member lies flat on the first duct. When the first is supplied with pressure air its portion upstream of the pressure member is inflated. This raises the spring and causes the free end of the spring to release a lever (H) otherwise held by the spring to fully constrict the second duct. The action allows water to flow through latter duct and mix with the air.