US PATENT SUBCLASS 417 / 109
.~.~ Valved gas inlet


Current as of: June, 1999
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417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
108  DF  .~ Aerated column {1}
109.~.~ Valved gas inlet {7}
110  DF  .~.~.~> With pumped fluid velocity or flow responsive valve operating means
111  DF  .~.~.~> Plural serially actuated valves
112  DF  .~.~.~> With flexible pressure responsive sensing element (i.e., bellows, diaphragm, etc.) {1}
114  DF  .~.~.~> With pilot valve
115  DF  .~.~.~> Valve member actuated responsive to absolute gaseous motive fluid pressure or flow rate
116  DF  .~.~.~> Controlled by means responsive to liquid level accumulation in column
117  DF  .~.~.~> Valve biased open by static pressure of pumped fluid


DEFINITION

Classification: 417/109

(under subclass 108) Apparatus wherein said injection means comprises valve means which opens and closes to control the gaseous motive fluid injected.