.~ Tool driven about axis transverse to draft line {5}
119
.~.~ Screw or spiral rib, blade or tooth row
DEFINITION
Classification: 172/119
(under subclass 118) Apparatus in which an earth working element which is driven about an axis transverse to the direction of travel is provided either with (1) a radially protruding ridge or sharpened plate or (2) a row of radially projecting prongs, which ridge, plate or row lies along a line which exends both longitudinally and circumferentially of a surface of revolution, such as a cylinder or cone.
SEE OR SEARCH THIS CLASS, SUBCLASS:
532, for nondriven earth working elements which are provided with screw or spiral arranged teeth, or like earth working
