Patent ID: 9362050
Filing Date: 2016-06-07
CPC Classification: F04D,H01F,H02K,Y10T

Claim Text:
1. A method comprising steps of: inserting a yoke and a magnet as a unit into a mold; supporting the unit within the mold by a support at a molding support region on the unit; filling the mold with plastic resin; retracting the support from the molding support region at a predetermined time during molding process; filling the molding support region with the plastic resin and fully encapsulating the unit with the plastic resin within the mold to provide a shell; and wherein the unit further includes a backing ring, a sleeve and a protective coating, wherein the backing ring is arranged radially outwardly of the yoke and axially adjacent to the magnet, the sleeve is arranged radially outwardly of the backing ring and the protective coating, and the protective coating arranged between the backing ring and yoke and between the backing ring and magnet.