Patent ID: 6866441

Claim:
A ball joint comprising a ball stud, a ball socket for swingably retaining a ball-shaped head of said ball stud with a bearing interposed therebetween, a retaining ring having a cylindrical portion press-fitted to an outer peripheral surface of a shank and a pair of large and small flanges protruding from axially outer and inner ends of said cylindrical portion, and a boot having first and second annular beads fitted to said retaining ring and said ball socket, respectively, said first mounting bead being formed with an inner periphery seal portion and an end face seal portion which are adapted to come into close contact with said cylindrical portion and said large flange, respectively, wherein said shank is formed with a press-fit portion to which said cylindrical portion is press-fitted, and an annular projection disposed opposite a juncture where said large flange meets said cylindrical portion and having a tapered forming face rising with an up-grade from a press-fit terminal end of said press-fit portion, and when said cylindrical portion is press-fitted to said press-fit portion, a particular cylindrical portion set at a tip end of said cylindrical portion is expanded by pressing the particular cylinder portion against said tapered forming face to form said small flange, wherein said small flange is placed in abutment against the tapered forming face.