US PATENT SUBCLASS 34 / 173
.~.~.~.~ Rotary stirrer or shelf

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

523  DF  APPARATUS {40}
165  DF  .~ Gravity flow type {7}
168  DF  .~.~ With gas or vapor flow for contact with treated material {4}
171  DF  .~.~.~ Shelf-to-shelf or zigzag treated material flow {2}
173.~.~.~.~ Rotary stirrer or shelf

DEFINITION

Classification: 34/173

(under subclass 171) Apparatus including shelves and/or stirrers that rotate or revolve about a substantially vertical axis.

(1) Note. The stirrer blades are usually arranged at an angle to move the material towards the discharge which may be radial openings in the shelves or openings at the edges or center.

(2) Note. Complete the search in this class, subclasses 179+, for stationary receptacle with agitator and conveyor, and in subclass 185, for revolving or swinging carrier with discharging scrapers.

SEE OR SEARCH CLASS

366, Agitating, appropriate subclasses, particularly

279+, and 432, Heating, subclass 131 for a shelf-to-shelf material heater having a rotary pusher and combustion products generating structure.