US PATENT SUBCLASS 417 / 106
.~.~ Plural alternating pumps

Current as of: June, 1999
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417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
105  DF  .~ By condensation of motive fluid {2}
106.~.~ Plural alternating pumps

DEFINITION

Classification: 417/106

(under subclass 105) Apparatus comprising plural pumping chambers which are so interrelated as to produce alternate or successive pumping from the chambers.