Patent ID: 11933310
Assignee: EDWARDS JAPAN LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 3:
4. A vacuum pump component which can be fastened to a fastening portion of a rotor shaft provided in a vacuum pump and can cover at least a part of a recess portion of a rotor coupled to the rotor shaft, wherein
the vacuum pump component is formed having a container shape and comprises:
a receiving portion comprising:
a ceiling surface configured to be opposed to and separated from an end surface of the fastening portion by a gap; and
a reinforcing portion protruding from the ceiling surface of the receiving portion such that the reinforcing portion is configured to be separate from a periphery of the fastening portion and the reinforcing portion decreasing deflection by increasing rigidity of the vacuum pump component; and

a contact-pressure generating portion which is pressed by fastening to the fastening portion in a fastening direction and can cause a contact pressure to be generated in the fastening direction.