US PATENT SUBCLASS 34 / 165
.~ Gravity flow type

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

523  DF  APPARATUS {40}
165.~ Gravity flow type {7}
166  DF  .~.~> Trough or tube, with axially rotary conveyor or agitator
167  DF  .~.~> Plural gravity path, plural feed, and/or discharge
168  DF  .~.~> With gas or vapor flow for contact with treated material {4}
175  DF  .~.~> With venting means or wall
176  DF  .~.~> With treated material tubes
177  DF  .~.~> With heating tubes
178  DF  .~.~> Shelf-to-shelf or zigzag treated material flow

DEFINITION

Classification: 34/165

(under the class definition) Apparatus in which material is fed in at an elevated level and flows generally downward through the treating zone or from one treating zone to another at least in part by gravity.

(1) Note. This subclass and the indented subclasses do not include plural conveyors feeding one to another usually by gravity, for which see this class, subclass 203 and indented subclasses, nor conveyors or cars which carry the material, the material not flowing, for which see subclasses 194, and 201 and indented subclasses, particularly subclasses 215, 216, 227, and 228.

SEE OR SEARCH THIS CLASS, SUBCLASS:

58, and 59, for apparatus involving centrifugal force, subclass 164, for material vibrating type, and subclass 147, for spiral path type.

64+, for devices here provided for plus cooler or cooling sections.

SEE OR SEARCH CLASS

159, Concentrating Evaporators,

13, and 15.

165, Heat Exchange,

93,.

198, Conveyors: Power-Driven,

311, 359+ and 523+.

202, Distillation: Apparatus,

221,.

432, Heating,

95+, for a residual gravity flow shaft type material heater.