US PATENT SUBCLASS 172 / 165
.~ Including colter
Current as of: June, 1999
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DEFINITION
Classification: 172/165
(under subclass 133) Apparatus comprising a colter for cutting a vertical slit in the ground in advance of at least a portion of an earth working element and an earth working element following the colter and having a vertically extending portion operating in the slit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19+, for sod cutters having means for cutting a strip of earth vertically and horizontally.
139, for a plow and colter mounted so as to be vertically movable along different paths or about different axes and lifting means connected to the tools such that vertical movement of one is accompanied by vertical movement of the other.
144, for the combination of a colter, jointer, and plow.
SEE OR SEARCH CLASS
111, Planting, 140, for a coulter claimed in combination with a planting machine.
171, Unearthing Plants or Buried Objects,
3, for unearthing devices with stabilizing colter or fin.
