US PATENT SUBCLASS 137 / 156
.~ Gas pressure discharge of liquids feed traps (e.g., to boiler)

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

154  DF  DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7}
156.~ 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}
159  DF  .~.~> Gas pressure controlled by amount of liquid in trap {3}
169  DF  .~.~> Gas pressure controlled by manual or cyclic means {1}

DEFINITION

Classification: 137/156

(under subclass 154) Apparatus which includes a receiving chamber which holds a liquid for subsequent discharge to a receiver at a higher pressure, which discharge is controlled or enabled by the controlled application of a gas pressure over the liquid equal to or greater than the pressure to which the liquid is discharged.

(1) Note. The discharge may be to a closed receiver at higher pressure than the trap filling pressure, which may be at atmospheric pressure, or the discharge may be to atmosphere or an open receiver from a vacuum system.

(2) Note. A feed or discharge trap in the fluid handling art is an auxiliary chamber which collects or portions out a separated quantity of fluid which is to be added to or removed from the quantity in the container to which it is auxiliary. It may discharge the separated quantity or merely make it accessible.

SEE OR SEARCH THIS CLASS, SUBCLASS:

177+, for gas traps which may utilize internal uncontrolled

pressure for liquid discharge.

206+, for gas pressure discharge of non feed trap type containers. 571+, for plural tanks or compartments connected for serial flow, and see the search notes to subclass 571.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

451+, for feed-traps of particular application to boilers.

417, Pumps,

118+, for liquid pumping by supplying or exhausting gaseous motive fluid to or from a liquid pumping chamber.