| 摘要 |
The coupling unit (1) is intended for connecting the outlet of a heating stove or extract fan to a flue or discharge opening. Two parts (2,3) are movable e.g. rotatable relative to one another. One part has an outlet spigot (4) of variable dia., e.g. converging conical, to fit the flue or discharge opening. - The other part (3) has an inlet spigot (5) offset relative to the spigot (4) and having a variable (6) dia. A screw (9) can have right and left-hand threads in lugs (8) on overlapping portions of the spigot to fit in or on the outlet of stove or fan.
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