Patent ID: 6123095
Filing Date: 2000-09-26
Classification: E03C,F16K,Y10T

Abstract:
A vacuum breaker for use in a fluid supply system comprising:a body having an interior, a fluid inlet, a fluid outlet, and an atmospheric air vent, the body adapted to permit fluid to flow through the interior from the fluid inlet to the fluid outlet;a first seat disposed within the interior;a bonnet having a second seat disposed above the first seat and communicating with the air vent and the interior; and,a displacable float cup having a sealed internal air pocket disposed substantially below the second seat, the float cup disposed between the bonnet and the first seat and adapted to be sealingly seated against the second seat when the vacuum breaker is subject to an open flow condition, wherein at least a portion of the air pocket is disposed within the fluid inlet substantially below an upper end of the first seat when the float cup is sealingly seated against the second seat, and adapted to be sealingly seated against the first seat when the vacuum breaker encounters a pressure loss condition,wherein at the open flow condition the float cup seals the air vent and at the pressure loss condition the float cup opens the air vent.