| 摘要 |
The roof window has a frame (1) including a side member (1a) and a sash (2) connected with the frame by means of a set of hinges (100, 200) defining a hinge axis of the window, and a lifting device (10) including a lifting arm (14) acting between the frame and the sash to provide a spring bias and assist the movement of the sash. The lifting arm (14) of the lifting device (10) is releasably connected with the sash (2), and that the lifting arm is adapted to assume a stable releasing and receiving position at a predefined opening angle. |
