Patent ID: 6974408

Claim:
A centrifuge for the purification of lubricating oil of an internal-combustion engine, including a housing with a removable cover, housing-fixed shaft arranged in the housing and with a centrifuge rotor which is rotatably mounted on the shaft and is replaceable, whereby the shaft is hollow at least in its lower part and forms in its hollow inside a section of a lubricating oil supply canal, which canal is in flow connection with an inside of the centrifuge rotor mounted on the shaft over at least one orifice opening, comprising: an adjustable valve plug arranged at the shaft and arranged to be held in an open position by the centrifuge rotor, the valve plug releasing the orifice opening in the open position, and the valve plug arranged to be transferred into a closing position and held in the closing positionby a force created by at least one of a pressure of the lubricating oil and by a preloading component of the centrifuge rotor is missing, the valve plug plugging the orifice opening in the closing position.