US PATENT SUBCLASS 137 / 197
.~.~ Discriminating outlet for gas

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}
171  DF  .~ Fluid separating traps or vents {5}
197.~.~ Discriminating outlet for gas {2}
198  DF  .~.~.~> With reverse flow stop or pressure regulating valve
199  DF  .~.~.~> Fluid sensing valve {2}

DEFINITION

Classification: 137/197

(under subclass 171) Separating traps wherein the trap is provided with an outlet through which outflow of a gas is permitted but outflow of a liquid or diverse gas therethrough is prevented.

SEE OR SEARCH THIS CLASS, SUBCLASS:

173+, for diverse fluid containing pressure systems having plural discriminating outlets or vents.

175+, for traps having a choke or restricted gas bleed.

213+, for liquid level responsive gas vents for boilers or other gas pressure over liquid devices which may also be utilized as safety or warning devices or whistles.

386, for liquid level responsive or maintaining devices involving hygroscopic means.

388, for liquid excluding devices for gas inlets or outlets in systems which are not diverse fluid containing pressure systems. 583+, for distribution systems having plural passages, one of which is a gas vent, and see the search notes to subclasses 583 and 587.

SEE OR SEARCH CLASS

96, Gas Separation: Apparatus, for apparatus for gas separation, per se, particularly

155+, for degasifying means for liquid, per se.

222, Dispensing,

69, for float operated controllers for dispensing container vents.