How can one wiper drive move two blades together?

A car’s windshield wipers sweep water aside with flexible blade edges. Under the visible arms, a drive and moving links coordinate their paths. A link is a connected part that transfers movement to another part.

In a connected arrangement, the drive moves a rod or linkage beneath the windshield. That movement pushes and pulls on short arms attached to wiper pivots. Each pivot turns its blade through a limited angle.

The links help both blades follow a planned sequence. Their positions and lengths determine the sweep rather than letting each blade turn freely in a full circle. Changing direction brings the blades back for another pass.

The drive provides movement, while the rubber edges move water off the glass. Different vehicles use different mechanisms, including separate coordinated drives. In the linked example, physical connections explain how one source of movement reaches both wiper arms.