Smoke extracting and filtering device for open foyer chimney, has upper part connected to lower part by post that moves upper part automatically between two positions, where smoke pipe is closed and opened in respective positions

摘要

The device has a cylindrical shaped lower part (5) disposing smoke at an end of the length of a smoke pipe (6). An upper part (7) forms a cover and is connected to the lower part by a post (8). The post is activated based on predefined instructions to move the upper part automatically between two positions, where the pipe is closed in one position and opened in the other position.