US PATENT SUBCLASS 172 / 92
.~.~ With means for moving blade

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

35  DF  WITH DRIVE MEANS FOR TOOL OR CLEANER {37}
91  DF  .~ Blade movable with respect to cyclically driven carrier {2}
92.~.~ With means for moving blade {3}
93  DF  .~.~.~> Rectilinearly reciprocating blade
94  DF  .~.~.~> Blade oscillating arcuately or swivelly with respect to rotary carrier
95  DF  .~.~.~> By cam or crank

DEFINITION

Classification: 172/92

(under subclass 91) Apparatus in which a means is provided for positively causing the movement of the tooth or like earth working part or portion relative to the carrier as said carrier moves through its path or orbit.

(1) Note. This subclass includes those earth working elements having earth working parts or portions which rotate or move in orbital paths relative to the cyclically driven carriers on which said parts or portions are mounted.

(2) Note. A mere spring connection between the blade and carrier for causing movement is not included in this definition. See subclass 96 for such apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

48+, for a carrier which is itself a separate earth working element.

546, for rolling carriers having earth working teeth, parts, or projections on the periphery thereof, there being provided a means to cause movement of said teeth, parts, or projections relative to the rolling carriers.