US PATENT SUBCLASS 241 / 251
.~.~.~.~.~ Both cooperating surfaces rotate

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}
244  DF  .~.~.~ Axial or radial flow of material (e.g., disc mill, or cone and shell mill) {6}
250  DF  .~.~.~.~ With moving cooperating surface {1}
251.~.~.~.~.~ Both cooperating surfaces rotate {2}
252  DF  .~.~.~.~.~.~> Non-coaxial or eccentric
253  DF  .~.~.~.~.~.~> Vertical axis

DEFINITION

Classification: 241/251

(under subclass 250) Devices in which both cooperating surfaces have a rotary motion.

(1) Note. The rotary motion of one of the surfaces may be due solely to frictional contact with the material or cooperating surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

117+, for devices in which a plurality of rotary surfaces cooperate with a common rotary surface.

227, for comminutors in which the material flows circumferentially or tangentially between a plurality of rotary surfaces.