(under subclass 428) Subject matter having a valve or pump to admit fluent material to or away from the containment, support or transfer means and power operated means to open or close the valve or turn off or on the pump.
(1) Note. The valve actuator may be, for example, a bias spring responsive to fluid pressure to open or close the valve or it may be a manual actuator powered by hand, other than merely a handle integral with a valve stem.
