Dispensing fitment for squeeze bottles

摘要: A dispensing fitment for squeeze bottles includes a combined discharge and vent passage establishing communication between the atmosphere interior of bottle, defining pair oppositely facing, annular valve seats different diameters, further including an resilient diaphragm extending across while being unattached to normally axially compressed against both closing passage. The is deflected open position in which it unseated from one when pressure within bottle exceeds atmospheric other reduced below atmospheric.