Patent ID: 11905968
Assignee: EDWARDS JAPAN LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A vacuum pump, comprising:
an inlet port flange;
a casing which functions as a housing for covering internal members;
an outlet port;
a base portion; and
a rotating portion which is enclosed by and rotatably supported by the casing and the base portion, wherein
the inlet port flange and the casing are formed as separate components, the casing is made of aluminum, and the inlet port flange and the casing are fastened to each other at an inlet port of the casing using a plurality of fastening bolts such that the inlet port flange extends radially outward from an outer periphery of the casing such that respective heads of the fastening bolts are exposed to the inlet port and the pump is configured to be coupled to an apparatus at a portion of the inlet port flange that is radially outward of the outer periphery of the casing;
characterized in that a plurality of bolt holes for receiving the plurality of fastening bolts are provided radially inside of the outer periphery of the casing.