Patent ID: 8931133
Filing Date: 2015-01-13
Classification: B60S

Abstract:
1. A connecting device which has a connecting element ( 18 ) of flat beam design fixed to a wiper blade ( 10 ) and an adapter ( 16 ) joined to said connecting element in an articulated manner and also a joining element ( 14 ) that is joined to a wiper arm ( 12 ), the adapter ( 16 ) being inserted into a u-shaped cross sectional profile of said joining element and being fixed by means of a spring tongue ( 64 ) arranged on a top wall ( 42 ) of the adapter to a pushbutton ( 66 ), wherein the connecting element ( 18 ) has a central web ( 28 ) running in a longitudinal direction of the wiper blade ( 10 ) and bearing a hinge shaft ( 30 ) projecting on long sides of the web, which hinge shaft is mounted in laterally flexible hubs ( 46 ) in side walls ( 40 ) of the adapter ( 16 ), characterized in that outwardly facing walls of said adapter ( 16 ), namely the side walls ( 40 ), the top wall ( 42 ) and end walls ( 36 , 62 ), have a general wall thickness of at least two millimeters, and the hubs ( 46 ) are formed as blind holes, cylindrical surfaces of which form radial sliding surfaces ( 48 ) and end faces of which form axial sliding surfaces ( 50 ) and close the blind holes, which are highly polished with an arithmetic mean roughness of Ra<0.2μ, and in that the sliding surfaces ( 48 , 50 ) are the sole contact surfaces between said connecting element ( 18 ) and said adapter ( 16 ).