US PATENT SUBCLASS 432 / 131
.~.~.~.~.~ Annular shelves and rotary pusher on central vertical axis

Current as of: June, 1999
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432 /   HD   HEATING

120  DF  WORK CHAMBER HAVING HEATING MEANS {12}
121  DF  .~ Having means by which work is progressed or moved mechanically {9}
128  DF  .~.~ Plural distinct chambers {2}
129  DF  .~.~.~ Work moved to drop between shelf or trough-type chambers {2}
130  DF  .~.~.~.~ Combustion products generated in or fed to chamber {1}
131.~.~.~.~.~ Annular shelves and rotary pusher on central vertical axis

DEFINITION

Classification: 432/131

(under subclass 130) Apparatus comprising horizontal annular shelves having a common vertical axis and a rotary shaft at the axis having a work pushing arm arranged to sweep a shelf.