US PATENT SUBCLASS 172 / 216
.~.~ Pivoted about spaced transverse axes, or translated

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

204  DF  ALTERNATING FOR RIGHT OR LEFT HAND OPERATION (OTHER THAN SCRAPER) {10}
213  DF  .~ Tools oriented for movement in opposite directions {4}
216.~.~ Pivoted about spaced transverse axes, or translated

DEFINITION

Classification: 172/216

(under subclass 213) Apparatus in which the earth working elements may be placed into and out of operative position by (1) movement about separate axes which are transverse to and spaced in the direction of travel or (2) movement in vertical planes in which the earth working elements maintain substantially the same angular position with respect to the ground.