Patent ID: 8148861

Claim:
A canned or sleeved rotary machine comprising: a rotor that is disposed in a particle-laden, acidic or corrosive liquid or gaseous atmosphere; and a functional electrical assembly, the functional electrical assembly including: a rotor armature secured to the rotor and placed in said acidic or corrosive liquid or gaseous atmosphere, and a stator armature that is secured to a stationary support and positioned facing said rotor armature, the stator armature comprising at least one winding and a ferromagnetic body that are positioned in a protective metal enclosure comprising: a solid part secured to the stationary support or coincident therewith, a thin can or sleeve, and a hermetic passage for wiring supplying said windings; wherein a potting compound fills residual internal gaps left in the ferromagnetic body, the windings, and the wiring, and wherein a dead volume in which the pressure is below atmospheric pressure is created inside the protective metal enclosure.