PERFECTIONNEMENTS APPORTES AUX PURGEURS D'AIR

摘要

An air vent is formed of a hollow chamber containing a metal float with a valve member forming the air outlet attached to the exterior of and disposed in communication with the hollow chamber. At the lower end of the hollow chamber an inlet port is located containing a syphon rod. Within the hollow chamber, a connecting member is attached to the float and a lever is loosely fitted into the connecting member and extends outwardly from the hollow chamber into a valve chamber in the valve member. Within the valve chamber a valve holder is fixed to the end of the lever and a valve body, preferably formed of a synthetic rubber, is fitted into the valve holder and is biased against a valve seat so that normally the air outlet is closed. When an excess of air accumulates in the hollow chamber, the float is displaced and it moves the lever causing the valve body to pivot about the valve seat so that the air is discharged from the hollow chamber through the valve member.