US PATENT SUBCLASS 172 / 138
.~ With interconnected vertical adjustment


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

133  DF  DIVERSE TOOLS {29}
138.~ With interconnected vertical adjustment {1}
139  DF  .~.~> Plow and colter


DEFINITION

Classification: 172/138

(under subclass 133) Apparatus in which the diverse earth working elements are independently mounted so as to be elevatable about separate axes or along different paths and lifting means are connected to each of the earth working elements the lifting means being so interrelated that vertical movement of one earth working element is accompanied by vertical movement of the other.

(1) Note. The tools may move in opposite directions, i.e., one move up while the other moves down.

(2) Note. The lifting means may comprise an actuator or an attendant manipulated handle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

488+, for a single-lift actuator for plural relatively movable like tools.