US PATENT SUBCLASS 417 / 134
.~.~.~ Control of motive fluid outlet

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}
134.~.~.~ Control of motive fluid outlet {2}
135  DF  .~.~.~.~> With control of pumped fluid outlet
136  DF  .~.~.~.~> With control of pumped fluid inlet

DEFINITION

Classification: 417/134

(under subclass 126) Apparatus wherein the flow of motive fluid from the pumping chamber is controlled by the buoyant means.

(1) Note. Devices having means to control the flow of motive fluid from the pumping chamber to the vacuum source are classified in this and indented subclasses.