Patent ID: 7580758

Claim:
An implantable cardiological electrode device, comprising a. an elongated tubular electrode body, b. an electrode supply line extending within the electrode body, c. a helical screw-in electrode displaceable at the distal end of the electrode body between a retracted passive position inside the electrode body and an extended active fixing position outside the electrode body, d. a cam controller including: (1) a cam coil fixed in the electrode body and coaxially with the electrode supply line, (2) a cam body fixed on the electrode supply line and engaging the cam coil, and (3) rotational stops which interact with the cam body to delimit the rotational movement of the electrode supply line, the rotational stops being defined by opposing ends of the cam coil bent into the path of movement of the cam body, wherein relative rotation between the electrode supply line and the electrode body engages the cam body with the cam coil to displace the electrode between the retracted passive position and the extended active fixing position.