.~.~> With thermal circulating means (thermo-siphons)
DEFINITION
Classification: 137/563
(under subclass 561) Systems including a flow path in which at least a portion of the fluent material is continuously circulated in a closed circuit. Such system may comprise (1) one or more return by-passes in which a portion of the fluent material in a flow line is diverted from and returned to the flow line at a point upstream from the point of diversion, or (2) a system in which the main portion of a flow continuously returns to the starting point, and one or more branches are provided for tapping and removing from the circuit a portion of the fluent material or one or more branches are provided
for admitting fluent material from an outside source into the circuit, or (3) all the material circulates in a confined path without addition or removal of material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
115.01+, for by-passes controlled by condition change in the main line.
407, for level responsive systems in which an auxiliary measuring chamber is connected at its top and bottom to the accumulation chamber the level in which is to be controlled or sensed.
599+, for fluid flow which is divided and recombined, and see the search notes on by-passes under subclass 599.
SEE OR SEARCH CLASS 222, Dispensing,
318, for dispenser systems involving return of material to the supply.
