(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.
