US PATENT SUBCLASS 417 / 147
.~.~.~.~ Unitary supply - exhaust valve


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}
137  DF  .~.~ Cyclic pumping {5}
145  DF  .~.~.~ Correlated supply - exhaust of motive fluid or vacuum generating means {2}
147.~.~.~.~ Unitary supply - exhaust valve


DEFINITION

Classification: 417/147

(under subclass 145) Apparatus wherein said valve means comprises a single valve member to control both supply and exhaust.