| 摘要 |
A shut-off valve has a pneumatic or hydraulic rotary drive (1) action (7, 8) on a shaft (4) has a cylinder (9). The shaft is coupled to a reversible free wheel (2) driven by a lever (5) that is essentially radial to the free wheel. The drive lever follows an alternating swivel-action (6) about the free wheel axis of rotation powered by the cylinder (9). |
