Contained transfer of materials
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United States of America Patent
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Jul 14, 2015
Grant Date -
Aug 16, 2012
app pub date -
Jul 14, 2010
filing date -
Jul 14, 2009
priority date (Note) -
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Abstract
A coupler assembly to transfer powdered material from a container includes an active valve with a docking part and a passive valve with a complementary docking part. The two docking parts enable the two valves to be secured together such that both the passive valve and the active valve can be opened. The coupler assembly includes a spigot that is movable between a first position in which the spigot allows the active valve to close with the spigot on the opposite side of the active valve to the docking part which engages the passive valve, and a second position in which the active valve is held in an open position and the spigot provides a passage for material passing through the passive valve to flow through the active valve whilst substantially preventing exposure of part of the active valve to any of the flowing material.
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