US PATENT SUBCLASS 417 / 288
.~.~ Sequentially operated separate relief or bypass passages

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

279  DF  WITH CONDITION RESPONSIVE PUMPED FLUID CONTROL {22}
286  DF  .~ Plural pump units with individual or relative control {2}
288.~.~ Sequentially operated separate relief or bypass passages

DEFINITION

Classification: 417/288

(under subclass 286) Apparatus in which the plurality of pumping units are each provided with a relief or bypass passage and the fluid flow control means comprises valve means which, in response to a condition, operates to serially open or close the passages.