US PATENT SUBCLASS 241 / 235
.~.~.~.~.~ Cooperating non-smooth surface characteristic

Current as of: June, 1999
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241 /   HD   SOLID MATERIAL COMMINUTION OR DISINTEGRATION

*  DD  APPARATUS {41}
198.1  DF  .~ Cooperating comminuting surfaces (e.g., jaw crusher) {5}
220  DF  .~.~ Rotary surface (or surfaces) {2}
221  DF  .~.~.~ Circumferential or tangential flow of material (e.g., roll mills or roll and concave mills) {7}
227  DF  .~.~.~.~ Both cooperating surfaces rotate (e.g., roll mills) {4}
235.~.~.~.~.~ Cooperating non-smooth surface characteristic {1}
236  DF  .~.~.~.~.~.~> Intermeshing

DEFINITION

Classification: 241/235

(under subclass 227) Apparatus in which one or both of the cooperating surfaces are not smooth but are provided with cooperating grooves, channels, protuberances or the like.

SEE OR SEARCH THIS CLASS, SUBCLASS:

96, for rolls provided with cooperating surface characteristics which reject certain types of material to prevent it from passing to the grinding nip.

242+, and 260+, for surfaces provided with cooperating nonsmooth characteristics in other types of comminutors.

293+, for single cylindrical comminuting elements provided with nonsmooth surfaces.