Abstract: The current invention proposes sharpening thin hardened metal blades with the hard turning process using a holder designed to hold the blades in a firm and stiff manner and a ceramic cutting tool held in a fixture. Generally, the cutting tool is held stationary in its fixture while the workpiece, in its holder, is rotated such that it repeatedly comes into controlled contact with the cutting tool. In sharpening operations such as proposed here, it is critical to (i) hold the workpiece firmly and rigidly, and (ii) position the cutting tool in a precise, predictable and reliable manner.

Abstract: The current invention proposes sharpening thin hardened metal blades with the hard turning process using a holder designed to hold the blades in a firm and stiff manner and a ceramic cutting tool held in a fixture. Generally, the cutting tool is held stationary in its fixture while the workpiece, in its holder, is rotated such that it repeatedly comes into controlled contact with the cutting tool. In sharpening operations such as proposed here, it is critical to (i) hold the workpiece firmly and rigidly, and (ii) position the cutting tool in a precise, predictable and reliable manner.

Abstract: A flush actuation assembly for flushing a urinal or a toilet, the flush actuation assembly comprising a housing a sensor assembly rotatably coupled to the housing, wherein the sensor assembly detects the presence/absence of a user in a target area and transmits a flush signal based on said detecting a flushing assembly, operatively coupled to the sensor assembly, for receiving the flush signal and causing the flushing of the urinal or toilet; wherein the sensor assembly is rotatable relative to the housing for detecting the presence/absence of a user in differing target areas.