US PATENT SUBCLASS 172 / 828
.~.~ With power means for raising and lowering blade

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

810  DF  MOUNTING FOR PUSHED TOOL AT END OF MOTOR VEHICLE {3}
811  DF  .~ Transversely mounted blade (e.g., bulldozer, etc.) {11}
828.~.~ With power means for raising and lowering blade {2}
829  DF  .~.~.~> Including elongated flexible element (e.g., cable) connecting power means to tool or mounting means
830  DF  .~.~.~> Power means is fluid servomotor {1}

DEFINITION

Classification: 172/828

With power means for raising and lowering blade:

(under subclass 811) Apparatus which includes a power system for causing vertical movement of the blade.