Abstract: A method for ascertaining status information regarding a status of an agricultural working tool of an agricultural working machine used for treating an agricultural area is disclosed. The agricultural working tool is tracked by way of a radar sensor in order to obtain radar sensor data, and the status information regarding the status of the agricultural working tool is ascertained using the radar sensor data of the radar sensor by way of a computing unit.

Abstract: An automatic folding knife including a locking and safety mechanism. The locking and safety mechanism includes a radially outer surface on a blade attachment ring having an arcuate blade-open locking recess and an arcuate blade-closed locking recess circumferentially spaced from each other. A generally cylindrical lock ring is selectively axially movable into and out of engagement with the locking recesses so as to selectively lock the blade in either its open position or its closed position. A rotatable “safety” push button is provided to push the lock ring out of engagement. The rotatable push button can be rotated from its “active” position to a “safe” position regardless of whether the knife blade is open or closed.