US PATENT SUBCLASS 241 / 88.1
.~.~.~.~.~ Perforation bounded by sharp edge

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  DF  .~.~.~.~ Provided with special comminuting surfaces or characteristics {3}
88.1.~.~.~.~.~ Perforation bounded by sharp edge

DEFINITION

Classification: 241/88.1

(under subclass 88) Apparatus wherein the openings in the foraminous surface are defined, at least in part, by an acute margin of the surrounding surface portion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

82.1+, for similar surfaces in devices provided with a helical pusher inside a tube.

273.1+, for comminuting surfaces having sharp edges, but not provided with discharge openings.