Vapor control

In a liquid dispensing nozzle comprising a body having an inlet and an outlet and defining a liquid conduit therebetween, said outlet defining a spout insertable into a container, a valve in said conduit controlling the flow of liquid from said inlet to said outlet, said valve biased toward a closed configuration, a manual valve operator for opening said valve, and means for releasably retaining said valve operator in an orientation which holds said valve open and for automatically releasing said valve operator in response to either of two conditions in said container, said conditions being buildup of vapor pressure to a predetermined vapor pressure and liquid reaching a predetermined level, the improvement wherein said means comprise a release unit biased to a neutral position in the absence of either of said conditions in said container, and movable, in response to said conditions, to first and second positions which are in opposite directions from said neutral position, a movable member secured to said valve operator, and retainer means disposed intermediate said release unit and said movable member, said release unit in said neutral position forcing said retainer means into engagement with said movable member to prevent movement thereof, but in said first and second positions releasing said retainer means.