Ball joint seals

A dust sealing cover for a pivotal ball joint assembly including a housing having an open end and a ball stud extending outwardly from said housing through said open end thereof, said cover comprising:

• an inverted cup-shaped body formed of elastic material and having a pair of opposite marginal portions each defining an opening, said opening of one of said marginal portions being smaller in diameter than that of the other marginal portion and adapted to receive said ball stud therethrough, said other marginal portion being flared to be fitted over said open end of said housing, said body including an intermediate portion extending between said smaller opening and said flared portion;
• and
• a ring having inner and outer circumferential edge portions, said inner edge portion including a continuously centrally inclined face forming a sharp-cornered innermost circumferential edge, said innermost circumferential edge having a continuous circumference of constant diameter lying in a plane vertically spaced from said outer edge portion, and having a diameter slightly smaller than the maximum diameter of said housing at said open end thereof, said ring, including said sharp-cornered innermost circumferential edge, being embedded in said flared portion, the gripping force of said ring through said flared portion against said housing being entirely through said sharp-cornered innermost circumferential edge.