| 摘要 |
A wiper for simultaneously wiping two adjacent circular surfaces, has a shaft spaced from a plane passing through the axes of the two surfaces. The shaft is parallel to the plane and supports a bell crank whose two levers form an angle of less than 180 DEG with each other and which constitute two wiper arms to which wiper blades are connected. An oscillatory drive means rotates the shaft between two angular end positions to sweep the surfaces which are simultaneously wiped by the wiper blades. |
