US PATENT SUBCLASS 414 / 316
.~.~.~.~.~ To maintain material surface horizontal

Current as of: June, 1999
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414 /   HD   MATERIAL OR ARTICLE HANDLING

288  DF  STATIC RECEPTACLE AND MEANS FOR CHARGING OR DISCHARGING, OR FACILITATING THE CHARGING OR DISCHARGING OF, THE RECEPTACLE {7}
304  DF  .~ Nongravity discharging means {4}
305  DF  .~.~ Including at least one discharge assistant of the compound motion type {2}
313  DF  .~.~.~ Having compound motion assistant operating on top of material {6}
315  DF  .~.~.~.~ Condition responsive {1}
316.~.~.~.~.~ To maintain material surface horizontal

DEFINITION

Classification: 414/316

To maintain material surface horizontal:

(under subclass 315) Apparatus wherein the condition sensed by the first means is the relation of the top surface of the material to the horizontal, and the additional means responds to a departure from the horizontal on the part of the top surface by causing the assistant to remove material in such a

manner that the top surface is made horizontal or more nearly so.