AUTOMATIC DRAINING DOUBLE CHECK VACUUM BREAKER
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United States of America Patent
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N/A
Issued Date -
Feb 28, 2008
app pub date -
Aug 22, 2006
filing date -
Aug 22, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A vacuum breaker having a housing with an inlet for connection with the wall hydrant, an outlet for connection with the hose, and a central cavity. A drain valve is disposed within the housing between the central cavity and the inlet to permit drainage of fluid from the hydrant to the outlet end of the housing when the hose is not connected thereto. A first check valve is disposed within the housing between the central cavity and the inlet to control flow between the inlet and central cavity. A second check valve is disposed within the housing between the central cavity and the outlet to control flow between the central cavity and the outlet, and the first and second check valves have an arcuate sealing surface.
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