| 摘要 |
A plurality of projections outstanding from an annular ring carrying the blades of the rotatable grille, and a slider bar which is guided for movement by guide means on the frame which carries the air deflector grille, the slider bar having on it at least one abutment surface which can be moved into or out of the path of travel of the projections, and so arranged that upon movement into that path of travel, the abutment surface abuts a projection and thereby inhibits further rotation of the grille. |
