US PATENT SUBCLASS 241 / 88
.~.~.~.~ Provided with special comminuting surfaces or characteristics

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

*  DD  APPARATUS {41}
83  DF  .~ Comminuting surface provided with openings to permit discharge of material {4}
84  DF  .~.~ Cooperates with moving comminuting surface or member {6}
86  DF  .~.~.~ Cooperates with rotary comminuting member {10}
88.~.~.~.~ Provided with special comminuting surfaces or characteristics {3}
88.1  DF  .~.~.~.~.~> Perforation bounded by sharp edge
88.2  DF  .~.~.~.~.~> And auxiliary imperforate surface (e.g., breakerplate) {1}
88.4  DF  .~.~.~.~.~> Spaced parallel bars (e.g., "grate")

DEFINITION

Classification: 241/88

(under subclass 86) Apparatus in which the screen surface is provided with projections or other characteristics which assist in effecting the comminution.

SEE OR SEARCH THIS CLASS, SUBCLASS:

235+, 242+, 260+, and 291+, for other comminuting elements provided with nonsmooth surface characteristics.