US PATENT SUBCLASS 417 / 130
.~.~.~ Control of motive fluid inlet (e.g., atmosphere, etc.)

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  DF  .~.~ With float actuated control means {5}
130.~.~.~ Control of motive fluid inlet (e.g., atmosphere, etc.) {1}
131  DF  .~.~.~.~> With control of motive fluid outlet {2}

DEFINITION

Classification: 417/130

(under subclass 126) Apparatus wherein the admission of the motive fluid to the pumping chamber is controlled by the buoyed means.

(1) Note. Apparatus having means to control the admission of atmospheric air to a pumping chamber adapted to be placed under a vacuum are classified in this and indented subclasses.