Carbonator and dispenser for carbonated liquid or the like

In a carbonated liquid dispenser having means for defining a flow path for the carbonated liquid from a container thereof to an outlet opening, a valve means for selectively opening and closing the outlet and a foam inhibiting means in the flow path upstream from said valve means for defining a passage portion of varying cross section over a finite distance within the path for retarding foaming of the carbonated liquid over said flow path, said flow inhibiting means including means for reducing the flow area along the path from a first relatively large area to a second relatively small area, for increasing the flow area along the path from the second relatively small area to a third relatively large area, for reducing the flow area along the path from the third relatively large area to a fourth relatively small area, and for increasing the flow area along the path from the fourth relatively small area to a fifth relatively large area, the improvement wherein the finite distance of said flow path is defined by a member having a chamber, said foam inhibiting means comprising first and second ball members of unequal diameter located in said chamber, chamber inlet means defining a seat for said first ball member and defining with said first ball member a passage therebetween for flow of fluid into said first relatively large area of said chamber, chamber outlet means defining a seat for said second ball member and defining with said second ball member a passage therebetween for flow of fluid from said fifth relatively large area of said chamber toward said valve, said first and second ball members being positioned in said seats to prevent both horizontal and vertical movement in said chamber while fluid flows therethrough.