US PATENT SUBCLASS 172 / 204
ALTERNATING FOR RIGHT OR LEFT HAND OPERATION (OTHER THAN SCRAPER)

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

204ALTERNATING FOR RIGHT OR LEFT HAND OPERATION (OTHER THAN SCRAPER) {10}
205  DF  .~> Draft revoluble on transverse axis
206  DF  .~> Interrelated tool shift and lateral movement of draft member {2}
209  DF  .~> Interrelated tool lift and shift {2}
212  DF  .~> Interrelated tool shift and ground support manipulation
213  DF  .~> Tools oriented for movement in opposite directions {4}
218  DF  .~> Shiftable moldboard
219  DF  .~> Tool shifted for opposite throw {3}
224  DF  .~> Axially rotatable implement {1}
228  DF  .~> Parallel separate tools {2}
232  DF  .~> Oblique axis in longitudinal vertical plane

DEFINITION

Classification: 172/204

(under the class definition) Apparatus comprising earth working means adapted to be adjusted so as to shift the earth in alternate lateral directions, with respect to the line of draft at different times.

(1) Note. Devices in which an earth working element is adjustable about a vertical axis for right or left hand operation, there being no actuating means for such adjustment or the actuating means comprising no more than a handle directly connected to the earth working element, are not included. See subclasses 577, 600, 603, and 735.

(2) Note. Devices in which an earth working element is swung

laterally (e.g., a cultivator shovel moved toward or away from a plant row) are not included if the purpose of the device is merely to provide for lateral adjustment and any moving of the earth to the right or left is merely incidental and not claimed.

(3) Note. A disk, scraper, or drag which is adjustable about a vertical axis to throw soil in opposite directions is not included. See subclasses 600 and 603 for such disks and subclasses 781+ and other appropriate subclasses for such scrapers or drags.

SEE OR SEARCH THIS CLASS, SUBCLASS:

34, for an apparatus which may include right and left hand tools in which the complete apparatus is adapted for use in an upside down position. 126+, for earth marking means mounted on an earth working device, said marking means being alternately engageable with the ground.

161+, for apparatus comprising diverse tools, at least one of which is alternated for right or left hand operation.

662, for an apparatus comprising plural relatively movable tools, at least one of which may be moved to nonuse position.

SEE OR SEARCH CLASS

171, Unearthing Plants or Buried Objects,

2, for alternately usable unearthing units.