US PATENT SUBCLASS 172 / 615
.~.~ Tools connected to parallel pivoted bars

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

613  DF  PLURAL RELATIVELY MOVABLE TOOLS {14}
614  DF  .~ Tool pivots on pivoted member when member moves {1}
615.~.~ Tools connected to parallel pivoted bars {1}
616  DF  .~.~.~> Bars pivoted about vertical axis {1}

DEFINITION

Classification: 172/615

(under subclass 614) Apparatus in which the earth working element mounting member and the means for pivoting the earth working element comprise a pair of spaced parallel bars both pivoted to the frame or support.