Patent ID: 7959423

Claim:
A vacuum pump, comprising a quick-rotatable component; a roller bearing for supporting the quick-rotatable component; and a lubricant pump for feeding lubricant to the roller bearing and having at least one pumping action-producing structure including a rotor, the roller bearing and the lubricant pump forming parts of a closed lubrication circuit including a hollow axle on which the rotor of the lubricant pump is rotatably supported, wherein the rotor of the lubricant pump has a shaft section and a helical channel provided in another section of the rotor, and wherein the section with the helical channel has a diameter greater than a diameter of the shaft section, wherein the rotor has a delivery structure located between the shaft section and the helical channel for delivery the lubricant in a region of the helical channel by centrifugal force, wherein the delivery structure includes a cone, a small diameter of which corresponds to the diameter of the shaft section and a large diameter of which corresponds to the diameter of the another section.