US PATENT SUBCLASS 172 / 649
.~.~ Tool groups relatively horizontally adjustable

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

613  DF  PLURAL RELATIVELY MOVABLE TOOLS {14}
645  DF  .~ Tools relatively adjustable horizontally without causing vertical displacement {7}
649.~.~ Tool groups relatively horizontally adjustable {2}
650  DF  .~.~.~> Also vertically adjustable
651  DF  .~.~.~> Group pivoted about vertical axis {1}

DEFINITION

Classification: 172/649

(under subclass 645) Apparatus in which groups of earth working elements are relatively adjustable as units in a horizontal sense without disturbing their position in a vertical sense.

(1) Note. For the meaning of "adjustable" see the class definition.