US PATENT SUBCLASS 417 / 126
.~.~ With float actuated control means

Current as of: June, 1999
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417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
118  DF  .~ Liquid pumped by supplying or exhausting gaseous motive fluid to or from pumping chamber {7}
126.~.~ With float actuated control means {5}
127  DF  .~.~.~> Plural floats in single pumping chamber
128  DF  .~.~.~> With intermediate pilot valve
129  DF  .~.~.~> With intermediate electrical actuating means
130  DF  .~.~.~> Control of motive fluid inlet (e.g., atmosphere, etc.) {1}
134  DF  .~.~.~> Control of motive fluid outlet {2}

DEFINITION

Classification: 417/126

(under subclass 118) Apparatus having means buoyed by the fluid which is pumped and responsive to change in level thereof to control flow of the fluid which is pumped or of the motive fluid into or from the pumping chamber.