US PATENT SUBCLASS 417 / 117
.~.~.~ Valve biased open by static pressure of pumped fluid

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
108  DF  .~ Aerated column {1}
109  DF  .~.~ Valved gas inlet {7}
117.~.~.~ Valve biased open by static pressure of pumped fluid

DEFINITION

Classification: 417/117

(under subclass 109) Apparatus wherein said valve means comprises a valve member, said valve member being biased closed by weight, spring, or other means, and having means exposed to the accumulation of liquid within said vertical column, which means, in response to the pressure of the accumulated liquid, opens or tends to open said valve member.