Windshield wiper linkage bushing

Claim 1

In a windshield wiper system employing motion transmitting linkage interconnected by journaling a stud of one linkage member within a bushing carried by a second linkage member, an improved linkage coupling arrangement for accommodating canting and rotational movement as between the interconnected linkage members, said linkage coupling arrangement comprising a first linkage member having an aperture therethrough, a resilient onepiece bushing having a body portion with oppositely disposed first and second end portions and an annular groove extending transversely about the outer surface of said body intermediate said bushing end portions, said bushing being located in the aperture of said first linkage member and retained therein by engagement of said first linkage member in said bushing groove, a bore in said bushing body extending through the first end portion and terminating adjacent the second end portion such that said second end portion defines an integrally formed cap of said bore, a stud projecting from the second of the linkages being interconnected and journaled in the bore of said bushing, and a seal surface in the first end portion of said bushing, said seal being formed by varying the diameter of said bore to provide a tapered surface capable of making sealing contact with said stud.