| 摘要 |
The invention relates to a closure device comprising a frame (1) provided with at least one flow passage (2), a closure means (3) mounted displaceable for each flow passage (2), and a counterpart (4a, 4b) for each closure means. The closure means (3) are arranged displaceable in guide grooves (6) formed in the frame in parallel with the flow passage (2) and are suspended between torsion springs (7). Each torsion spring (7) is formed of a wire that is bent to define a coil (8) and to have a first arm (9) and a second arm (10) extending from the coil (8). The first arm (9) of each torsion spring (7) press against the closure means (3) and the second arm (10) of each torsion spring (7) press against the frame (1). Each torsion spring (7) is made of spring steel having a diameter between 1.9 and 1.1 mm. |
