US PATENT SUBCLASS 172 / 632
.~.~ Group movable about oblique horizontal axis

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

613  DF  PLURAL RELATIVELY MOVABLE TOOLS {14}
619  DF  .~ Plural tool groups relatively vertically movable because of operation {9}
632.~.~ Group movable about oblique horizontal axis

DEFINITION

Classification: 172/632

(under subclass 619) Apparatus in which the earth working element groups are connected to a draft member or to each other so they have relative movement about a horizontal axis which is at an angle to the line of draft.