US PATENT SUBCLASS 172 / 516
.~.~.~ Plural cooperating elements

Current as of: June, 1999
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172 /   HD   EARTH WORKING

508  DF  WITH GUARD, SHIELD OR PLANT DIVERTER {3}
514  DF  .~ Weed turner or trash holddown {1}
515  DF  .~.~ Spring biased or spring formed {1}
516.~.~.~ Plural cooperating elements

DEFINITION

Classification: 172/516

(under subclass 515) Apparatus in which said spring biased or formed means comprises a plurality of closely spaced or contacting elements which allow the passage of obstructions or larger plants between the elements.

SEE OR SEARCH CLASS

171, Unearthing Plants or Buried Objects,

55, and 56 for an extractor for unearthing plants or buried objects comprising plural cooperating plant grasping jaws.