专利名称：COUPLING ASSEMBLY发明人：HAMMOND H,US申请号：US3729023D申请日：19720126公开号：US3729023A公开日：19730424
摘要：An improved coupling includes a shut-off and velocity control valve assemblywhich blocks fluid flow upon disconnection of the coupling and whenever the velocity offluid flow through the coupling exceeds a predetermined rate. The shut-off and velocitycontrol valve assembly includes a main valve which is operated from an open condition toa closed condition in response to a predetermined pressure differential across the mainvalve. Therefore, the main valve closes when the coupling is disconnected and one side ofthe main valve is exposed to atmospheric pressure. The main valve also closes if anexcessive amount of fluid is exhausted due to a rupturing of a conduit or a malfunction ofequipment associated with the coupling. A pilot valve effects operation of the main valveto the open condition upon connection of the coupling by enabling fluid to flow from ahigh pressure side to a low pressure side of the main valve to thereby reduce thepressure differential across the main valve. Full flow is re-established through the mainvalve upon opening of the main valve by a biasing spring after the pressure differentialacross the main valve has been reduced.
申请人：HANSEN MFG CO,US
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