US PATENT SUBCLASS 171 / 121
.~.~ Impeller or breaker driven through cyclic path

Current as of: June, 1999
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171 /   HD   UNEARTHING PLANTS OR BURIED OBJECTS

111  DF  EARTH REMOVAL AND SEPARATION {8}
114  DF  .~ With impeller or clod breaker for excavator or separator {4}
121.~.~ Impeller or breaker driven through cyclic path

DEFINITION

Classification: 171/121

(under subclass 114) Apparatus in which the impeller or breaker means is journalled on a frame structure and adapted to be moved through a closed orbital path or through a rectilinear reciprocatory path.

SEE OR SEARCH THIS CLASS, SUBCLASS:

91, and 99, for separating diggers which are driven through a cyclic path and which may or may not be combined with an excavating or separating surface.