Patent ID: 8142136

Claim:
An oil-sealing arrangement for cooling fan, comprising: a fan housing provided at a center with a hollow pipe having a front end formed into an annular projected portion for receiving a hollow bearing therein; the bearing having a forward tapered projection formed at a front end thereof, and being fitted in the hollow pipe with a clearance existed between the bearing and an inner wall surface of the hollow pipe; an insulating locating member being formed at a central portion with a fitting bore for mounting around the hollow pipe of the fan housing, and defining an open-bottom recess behind the fitting bore for engaging with the annular projected portion of the hollow pipe; and a blade carrier including a rearward extended fitting cylinder for extending through the fitting bore of the insulating member and being internally provided with a rearward tapered projection, which cooperates with the forward tapered projection of the bearing to define a seeped oil chamber between them; and a shaft being fixed to and rearward extended from a center of the fitting cylinder to extend through the hollow bearing.