US PATENT SUBCLASS 172 / 635
.~.~ With actuator

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

613  DF  PLURAL RELATIVELY MOVABLE TOOLS {14}
634  DF  .~ Parallel, pivotally adjusted tool bars {2}
635.~.~ With actuator {3}
636  DF  .~.~.~> Tools also adjustable about vertical or longitudinal axes
637  DF  .~.~.~> Plural actuators, independently pivoted tool bars
638  DF  .~.~.~> Gear

DEFINITION

Classification: 172/635

(under subclass 634) Apparatus including an actuator for pivoting one or more of the bars.

(1) Note. See the class definition for the definition of "actuator".

SEE OR SEARCH THIS CLASS, SUBCLASS:

390, for apparatus having a plurality of spring tools carried by parallel pivoted tooth bars and also having a wheel substitute such as a runner, said bars usually having an actuator to pivot said bars.

622, for similar structures in which the tooth bars are each free to move vertically with respect to the others.