Patent ID: 9453514
Filing Date: 2016-09-27
CPC Classification: F04D

Claim Text:
1. A vacuum pump, comprising at least one gas inlet opening; at least one gas outlet opening; at least one rotor shaft; a rotor mounted on the at least one rotor shaft and having rotatable therewith pump active components arranged opposite stationary pump active components; at least one fastening element extending in an axial direction and provided in or on the rotor shaft for securing the rotor on the rotor shaft; and at least one safety element provided in addition to the at least one fastening element for preventing rotation of the at least one rotor and the at least one rotor shaft relative to each other, wherein the rotor and the rotor shaft have cooperating contact surfaces, wherein the safety element comprises at least one projection provided in one of the cooperating surfaces of the rotor and the rotor shaft for forming a plastic deformation in an opposite of the contact surfaces of the rotor and the rotor shaft, the plastic deformation defining a counter-projection.