US PATENT SUBCLASS 432 / 218
.~.~ Annular divider forms concentric chambers

Current as of: June, 1999
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432 /   HD   HEATING

214  DF  HEAT GENERATING MEANS HEATS HEAT STORAGE MASS OF SOLID MATERIAL {3}
217  DF  .~ Dividing wall in casing forms combustion and heat storage chambers {1}
218.~.~ Annular divider forms concentric chambers

DEFINITION

Classification: 432/218

(under subclass 217) Apparatus in which the partition is an annular member concentrically arranged within a cylindrical casing.