US PATENT SUBCLASS 172 / 229
.~.~ Interconnected for simultaneous raising and lowering


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}
228  DF  .~ Parallel separate tools {2}
229.~.~ Interconnected for simultaneous raising and lowering


DEFINITION

Classification: 172/229

(under subclass 228) Apparatus having means connecting the earth working elements such that movement of one element in one direction (i.e., raising or lowering) is accompanied by movement of the other element in the opposite direction.

(1) Note. The connecting means may be temporarily disabled to allow both tools to be raised or lowered.

SEE OR SEARCH THIS CLASS, SUBCLASS:

130+, for apparatus comprising an earth working device and plural earth marking means, the plural earth marking means being interconnected so that adjustment of one causes movement of another.