US PATENT SUBCLASS 34 / 119
.~.~.~.~ Heat exchange fluid supply and/or removal

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

523  DF  APPARATUS {40}
108  DF  .~ Rotary drums or receptacles {7}
110  DF  .~.~ External {6}
113  DF  .~.~.~ Plural {5}
119.~.~.~.~ Heat exchange fluid supply and/or removal

DEFINITION

Classification: 34/119

(under subclass 113) Apparatus including means to supply and/or remove the heat exchange fluids from the drums.

(1) Note. While some of the patents included here include nonautomatic means to control the pressure throughout the drums, such as restrictions in the feed or discharge lines, this subclass does not include means responsive to a condition to be controlled to actuate a condition controlling means. Complete the search in this class, subclasses 524+ and indented subclasses, particularly subclasses 549+ and 556, which contain such devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124, and 125, for single drums.

SEE OR SEARCH CLASS

237, Heating Systems, 67, and 68 for steam heating systems.