US PATENT SUBCLASS 172 / 213
.~ Tools oriented for movement in opposite directions

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


172 /   HD   EARTH WORKING

204  DF  ALTERNATING FOR RIGHT OR LEFT HAND OPERATION (OTHER THAN SCRAPER) {10}
213.~ Tools oriented for movement in opposite directions {4}
214  DF  .~.~> Wheeled frame with reversible draft member
215  DF  .~.~> Tilting beam
216  DF  .~.~> Pivoted about spaced transverse axes, or translated
217  DF  .~.~> With movable deflector

DEFINITION

Classification: 172/213

(under subclass 204) Apparatus having separate earth working elements so directed as to be alternately usable when the frame on which they are mounted is moved in opposite directions without reversal of the frame.