US PATENT SUBCLASS 137 / 158
.~.~.~ Pressure connection at liquid level in boiler or discharge receiver

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

154  DF  DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7}
156  DF  .~ Gas pressure discharge of liquids feed traps (e.g., to boiler) {3}
157  DF  .~.~ Gas pressure controlled by amount of liquids in boiler or discharge receiver {1}
158.~.~.~ Pressure connection at liquid level in boiler or discharge receiver

DEFINITION

Classification: 137/158

(under subclass 157) Feed-traps which include a gas pressure

connection at the desired liquid level in the discharging receiver.

SEE OR SEARCH THIS CLASS, SUBCLASS:

393, for level controlled valves having a control fluid connection at the desired liquid level in nonpressure systems.