Patent ID: 7833105

Claim:
A drive wheel bearing device comprising: a hub to which a wheel may be fixed; a hub bearing disposed on an outer circumferential surface of said hub and supporting said hub rotatably on a vehicle body; and an outer race member of a constant velocity universal joint, said outer race member being fitted into said hub and comprising a cup and a shaft, wherein a surrounding member is disposed in surrounding relation to the cup of said outer race member with a gap interposed therebetween, such that either one of a first seal member and a second seal member, which are annular in shape, are disposed between a radial inner surface of said surrounding member and a radial outer surface of said outer race member, and wherein a radial outer end of said first seal member or said second seal member is spaced from the radial inner surface of said surrounding member by a radial spacing, said radial spacing being smaller than another area of said gap which is free of said first seal member or said second seal member.