US PATENT SUBCLASS 137 / 492.5
.~.~.~.~ Spring biased

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

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
485  DF  .~ Pilot or servo controlled {3}
488  DF  .~.~ Fluid pressure type {2}
492  DF  .~.~.~ Single acting fluid servo {1}
492.5.~.~.~.~ Spring biased

DEFINITION

Classification: 137/492.5

(under subclass 492) Devices in which the constantly acting pressure or bias is a spring.