US PATENT SUBCLASS 417 / 123
.~.~.~ Motive fluid in one chamber controlled by condition in second chamber

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}
122  DF  .~.~ Alternate pumping from plural pumping chambers {1}
123.~.~.~ Motive fluid in one chamber controlled by condition in second chamber {2}
124  DF  .~.~.~.~> Responsive to weight of pumped fluid
125  DF  .~.~.~.~> Responsive to liquid level of pumped fluid

DEFINITION

Classification: 417/123

(under subclass 122) Apparatus wherein said interrelated means is responsive to a condition of the motive fluid or the fluid which is pumped in a first chamber, to control the supplying or exhausting of motive fluid to a second chamber.