Patent ID: 8142292

Claim:
A universal joint comprising: a spider having a trunnion that includes a trunnion bearing surface, a trunnion sealing surface and a seal mount surface, the trunnion sealing surface and the seal mount surface being coaxial with the trunnion bearing surface; a bearing cup having an open end, an inner bearing surface, and a bearing cup sealing surface, the bearing cup sealing surface being coaxial with the inner bearing surface; a bearing disposed between the trunnion bearing surface and the inner bearing surface; and a seal assembly sealingly engaged to the bearing cup and the spider, the seal assembly including a first portion and a second portion, the first portion being mounted on the seal mount surface and having a first annular wall member, a second annular wall member and a radially extending wall member that spaces the first and second annular wall members radially apart from one another so as to define an interior channel that is disposed coaxially about the trunnion, the second portion including a first seal member, a second seal member, a third seal member and a bumper, the first seal member being sealingly engaged to the trunnion sealing surface, the second seal member being sealingly engaged to one of the trunnion sealing surface and the first annular wall member, the third seal member being sealingly engaged to the second annular wall member, and the bumper contacting the radially extending wall member to limit axial movement of the second portion toward the first portion.