| 摘要 |
The adjustable ventilation device is for installation in a window frame, where it is fixed by a profile part (1), in which is a ventilation through passage, a valve part (3) being fixable in the profile part and pivotable betweeen a freeing and closing positions of the ventilation through passage. An operating mechanism is provided for the valve part and comprises a rotary component for pivoting the valve part. The rotary part is rotatable in relation to a coaxial bearer of a holder fixed in relation to the profile part. The rotary part works in conjunction with the holder via a tension component. Either the rotary component or the bearer has an axially freely extending arm (23), whilst the other has a stop (21). The free end of the arm works in conjunction with the stop under sprung tension. |
