US PATENT SUBCLASS 137 / 425
.~.~.~ Within tank

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

Internet Version by PATENTEC © 1999      Terms of Use


137 /   HD   FLUID HANDLING

386  DF  LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11}
409  DF  .~ By float controlled valve {11}
424  DF  .~.~ With counter-balance {1}
425.~.~.~ Within tank

DEFINITION

Classification: 137/425

(under subclass 424) Apparatus in which the counterbalancing means is within the tank holding the liquid accumulation.