US PATENT SUBCLASS 172 / 219
.~ Tool shifted for opposite throw

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}
219.~ Tool shifted for opposite throw {3}
220  DF  .~.~> Reversible disk with reversible cleaner
221  DF  .~.~> Plural tools shifted about individual vertical axes {1}
223  DF  .~.~> Moldboard type shiftable about longitudinal axis

DEFINITION

Classification: 172/219

(under subclass 204) Apparatus in which the same earth working element is utilized to move the soil in alternate lateral directions.

(1) Note. An earth working means having opposite ends or sides, one being used to move the soil in one direction and the other side or end being used to move soil in the other direction, is considered to be plural tools and is excluded from this and indented subclasses, except when the ends or sides are connected by a common moldboard or soil deflector portion which is utilized to deflect soil in both phases of operation.