US PATENT SUBCLASS 241 / 220
.~.~ Rotary surface (or surfaces)

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.~.~ Rotary surface (or surfaces) {2}
221  DF  .~.~.~> Circumferential or tangential flow of material (e.g., roll mills or roll and concave mills) {7}
244  DF  .~.~.~> Axial or radial flow of material (e.g., disc mill, or cone and shell mill) {6}

DEFINITION

Classification: 241/220

(under subclass 198) Apparatus in which at least one of the cooperating surfaces rotates about an axis which is contained within the confines of the surface.

(1) Note. For the purpose of classification in this group, the rotation must be continuous. Devices in which the rotation was intermittent were classified in subclass 198.1 or other appropriate subclass.

(2) Note. The notes to subclasses 198.1, 221 and 244, should be referred to for notes to other classes having similar organizations involving rotary surfaces.

SEE OR SEARCH THIS CLASS, SUBCLASS:

86, 138+, 154, and 185.5-197, for devices in which the comminution is effected by rotary striking members.

103+, 123+ and 203, for compound movement comminuting surfaces having rotary motion as a component thereof.

107+, for plural rotary surfaces which cooperate with a common surface. 141, and 157+, for plural comminutors having rotary cooperating comminuting surfaces.

277+, for comminutors having rotary surfaces which do not cooperate with a cooperating surface.