US Patent 7581280 Wiping device for windows of motor vehicles

The invention relates to a wiper device for windows of motor vehicles, comprised of a non-articulated wiper blade with a wiper strip, a wiper lip arranged thereon and a coupling part that can be connected to the wiper blade for a detachable connection with a swivelable wiper arm of the vehicle, wherein the wiper strip includes a profile with guide grooves to laterally accommodate two spring rails, which are each connected with one another as a single piece on their two ends. It is provided that the wiper strip (16) feature a locking device, which, in a locked setting, fixes the spring rails (20) in the wiper strip (16), and which, in an unlocked setting, enables a longitudinal displacement of the spring rails (20) in the guide grooves (24) of the wiper strip (16).