US PATENT SUBCLASS 172 / 529
.~.~ Positive stop


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

518  DF  ROLLING, ROTATING OR ORBITALLY MOVING TOOL {30}
528  DF  .~ With means for stopping or retarding rotation {1}
529.~.~ Positive stop {1}
530  DF  .~.~.~> Wheel or motor controlled


DEFINITION

Classification: 172/529

(under subclass 528) Apparatus in which the brake or stop means comprises a detent device which acts to positively stop motion by abutment against a shoulder rather than by a frictional engagement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

237, for a tool latched in working position and rotatable through 360 deg. to return to working position and having a ground- engageable draft responsive lever (e.g., wheel segment) to rotate the tool through a portion of the cycle after release of the latch.

SEE OR SEARCH CLASS

37, Excavating,

440, for scoops adapted to be rotated by forward movement of the device.