US PATENT SUBCLASS 137 / 154
DIVERSE FLUID CONTAINING PRESSURE SYSTEMS

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

154DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7}
155  DF  .~> Gas lift valves for wells
156  DF  .~> Gas pressure discharge of liquids feed traps (e.g., to boiler) {3}
170.1  DF  .~> Foam control in gas charged liquids {3}
171  DF  .~> Fluid separating traps or vents {5}
205  DF  .~> Liquid filling by evacuating container
205.5  DF  .~> Main line flow displaces additive from shunt reservoir
206  DF  .~> Gas pressure storage over or displacement of liquid {5}

DEFINITION

Classification: 137/154

(under the class definition) Apparatus which contain under pressure a plurality of fluids having diverse characteristics such as fluid phase (i.e., gas and liquid) or specific gravity, and which fluids are in contact in at least a part of the system.

(1) Note. The pressure need not exist continuously in the system, but must be present at least some of the time.

(2) Note. This subclass does not include systems in which diverse fluids as steam and water are utilized merely for heating purposes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

241, for steam sterilization in fluid handling systems.

246, for liquid supplied at a valve interface, which liquid may be different from the fluid handled in the system.

334+, for gas and liquid containing systems for heating, as by mixing steam and water. See Note (1) above.

SEE OR SEARCH CLASS

222, Dispensing,

394+, for dispensers with fluid pressure discharge assistants, and see the search notes to subclass 394.

399, Electrophotography,

237+, for liquid developer applied to a latent image within an electrophotos:graphic device.