.~.~ With thermal circulating means (thermo-siphons)
DEFINITION
Classification: 137/564
(under subclass 563) Systems comprising a circulating system in which the thermal characteristics of the system are such that temperature differences exist at spaced points in the device and cause flow of the fluent material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
334+, especially subclasses 337 and 340 for similar structure in which heat exchange is the primary consideration, and see the definition of subclass 334 for collected search notes on fluent material handling systems involving heat or heating means.
