ACCESSORY FOR AN EXHAUST VENTILATION PIPE

ACCESSORY FOR AN EXHAUST VENTILATION PIPE

This invention concerns an accessory for an exhaust ventilation pipe, which exhaust ventilation pipe comprises an exhaust pipe of a ventilation channel, provided with a hat and extending through an outer roof of a building, the upper part of the hat being provided with a conical cup preventing rain water from entering the ventilation channel.

Installation of such an exhaust pipe provided with a hat into a vertical position at an inclined roof causes often problems, resulting in that the installed exhaust pipe often leans in some direction.

The object of the present invention is to eliminate such a problem, which is achieved with an accessory being characterized in that a circular spirit level is integrated on the top of the conical cup in the hat. Due to this an installer sees immediately without any other accesso- ries, when the exhaust pipe is vertical, which considerably facilitates and fastens the installation.

The exhaust pipe provided with a hat comprises preferably an extractor, the electric motor and propeller of which are positioned in the hat of the exhaust pipe below the conical cup. The exhaust pipe is preferably thermally insulated.

In the following the invention will be described in more detail with reference to the drawing, wherein Fig. 1 shows a perspective view of an example of an exhaust ventilation pipe being provided with an accessory according to the invention.

Fig. 2 an enlargement of region A of Fig. 1, and Fig. 3 shows a top view of an exhaust ventilation pipe according to Fig. 1.

The exhaust ventilation pipe according to the drawing is a roof extractor having a hat 2 mounted onto the end of an exhaust pipe 1, in which hat 2 below a conical cup 3 an electric motor and a propeller (not shown) of the extractor is mounted. An inner pipe 4 of the exhaust pipe 1 is intended to protrude through an outer roof of a building and it is intended to be attached to a ventilation channel under the roof. By means of a pass-through device matching with the shape of the roofing of the outer roof and having a ball shaped collar part, the inner pipe 4 of the exhaust pipe will tightly be led through the roof, when the bot- torn end of the outer mantle of the exhaust pipe 1 is provided with a ball shaped enlargement piece 5 adaptable onto said collar part.

A circular spirit lever 6 is integrated on the top of the conical cup 3 in the hat 2, by means of which an installer easily sees, when said exhaust ventilation pipe is in quite a vertical position, i.e. when the glass pearl of the spirit level is in the middle of the spirit level.

The diameter of said conical cup 3 is smaller than the inner diameter of the hat 2, so that an annular slot is formed between the wall of the hat and the cup, through which rain water can flow down onto a conical collar 8 fastened by supporting arms 7 to the side wall of the hat 2, from which collar 8 the water flows out of the hat 2. The conical cup 3 is fastened to the side wall of the hat 2 by fastening ribs 9.

In the drawing also a cable 10 coupled to the electric motor of the extractor can be seen.