Patent ID: 8683966

Claim:
A camshaft adjusting apparatus, comprising: a drive input wheel; a drive output part rotatable relative to the drive input wheel, the drive input wheel and drive output part being operatively connected by at least one pressure space which can be charged with a pressure medium; a locking device actuatable by the pressure medium to mechanically couple the drive input wheel and drive output part; a regulating device comprising a control valve having a pressure medium connection with two working ports, which communicate with the pressure space, a control inlet port, separate from the working ports, and a control outlet port, separate from the working ports, the control inlet port and the control outlet port communicating with the locking device, the regulating device being operative to regulate a supply of the pressure medium to and a discharge of the pressure medium discharge from the pressure space and the locking device; and at least one shut-off device arranged in the pressure medium connection so that a passage of the pressure medium can be blocked in a pressure-tight manner in a direction of the pressure space, wherein the pressure medium connection has a control inlet connection that charges the locking device with the pressure medium and a control outlet connection in parallel with the control inlet connection for discharge of the pressure medium out of the locking device, the control inlet connection being in communication, at a valve side, with only the control inlet port and the check valve is arranged in the control inlet connection, the control outlet connection being in communication, at the valve side, with only the control outlet port.