Clutch for a cooling fan of a motor vehicle and method of making the same

Abstract From the Canadian patent

A clutch for a cooling fan for a motor vehicle and a, method of making the same, are provided herein. The clutch includes a shaft having a knurled portion that press-fittingly receives an inner race member of a bearing the shaft having a, solid, ring-shaped portion disposed adjacent the knurled portion and being provided with an outer diameter equal to that of the outer diameter of the knurled portion and having part of the inner race member of the bearing press-fitted thereon. By such structure, the solid, ring-shaped portion is adapted to block the flow of viscous fluid out of an enclosed chamber of a housing of the clutch by way of the slots which define protuberances of the knurled …