US PATENT SUBCLASS 417 / 141
.~.~.~.~ Responsive to flow of pumped fluid

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
139  DF  .~.~.~ Control by condition of pumped fluid {3}
141.~.~.~.~ Responsive to flow of pumped fluid

DEFINITION

Classification: 417/141

(under subclass 139) Apparatus wherein the mechanism, by which the fluid which is pumped is admitted to or ejected from the pumping chamber, is controlled in response to the rate of flow of the fluid which is pumped.