Patent ID: 7396016

Claim:
A sealing device comprising: an inner race being a circular frame having a top race face and a bottom race face; an outer race capped on said inner race and rotatable relatively to said inner race, said outer race being a circular frame having an inner race face, an outer race face, a front blocking panel, a rear blocking panel, and two inner surfaces; an inner oil seal mounted to said inner race and having a front lip, a rear lip, an extension lip, and a main lip, said main lip having a ridge, a front surface, and a back surface, said inner oil seal being forced by a radial pressure to press said ridge against the inner race face of said outer race; an oil passage defined among said top race face of said inner race, said inner race face of said outer race, one of said inner surfaces of said outer race, and said inner oil seal for receiving oil inside; a spoiler formed on said front surface of said main lip of said inner oil seal and facing said oil passage for causing convection of said oil while said outer race is rotated relatively to said inner race; wherein said outer race has a plurality of radiation holes in communication with said oil passage and the outside of said outer race an outer oil seal, having a protruding lip and a stop lip, attached to a free end of the rear blocking panel of said outer race and extending radially inwards; a first curved surface defined between the rear lip and the extension lip and a second curved surface defined between the stop lip and the protruding lip, the first and second curved surfaces defining an area therebetween; and lubricating grease applied to the area between the first and second curved surfaces and between a surface of the front lip and the front blocking panel of the outer race.