DE2635240A1 - Cover for ventilation shaft - incorporates air-deflecting lower convex cone which is screwed or glued to cover - Google Patents

Abstract

The cover is for a ventilation shaft (1), and has a foamed-in cone (2) on its lower surface. The cone may be manufactured independently, and fastened with adhesive or screws, etc. to the cover. The cone dia. is smaller than that of the cover, so that a circumferential gutter edge (3) is formed. The cover may be clad with cardboard, sheet, metal, synthetic, or a mineral material.

Description

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PRIX - Bauelemente Gesch.Z. W / 19

Wiehofsky & Drexl

8919 Schondorf / Ammersee

"Lid for ventilation chimneys with underside Plastic foam cone "

The invention relates to a cover with aerodynamic properties, consisting of a conical or flat top, - to which a cone is foamed or glued on the underside.

Lids for ventilation chimneys are known in a conical or flat shape. They are round or square and are made of sheet metal, asbestos cement or plastic.

A major disadvantage of the known lids is that the rising exhaust air under the Ceilings form vortices, thereby creating a backwater and preventing the exhaust air from being discharged into the open air will. This means that in rooms - for example stables with gravity ventilation, larger chimney diameters, or stronger fans required for forced ventilation.

But even these measures do not lead to satisfactory results because the exhaust air backflow does not can be fully eliminated.

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Try turning tapered lids over and using the Arranging the cone point downwards did not lead to success. Either rain or melt water flows, that cannot be sufficiently discharged into the ventilation chimney or the technical effort is closed high and too expensive.

The invention avoids these drawbacks in a surprisingly simple way by putting under the top Lid part an air-repellent convex cone is foamed.

The outflowing exhaust air meets the convex cone and flows unhindered into the open.

In the context of the invention, it may be advisable to produce the cone separately from the upper shell and because of space-saving storage and cheaper transport only before installation with the upper shell Connect using foam, glue, clamps, screws, dowels, etc.

For the cone according to the invention, exhaust air-resistant synthetic foam, ζ. Β. made of polyurethane, polyester, polystyrene o.a. used. It may still be advisable to use the foam z. B. for optical reasons with sheet metal, plastic or to disguise cardboard.

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FIG. 1 shows a cover with a convex upper part (1) placed on a ventilation chimney and foamed-on cone (2).

FIG. 2 shows a separate cone for covers that are convex on both sides.

Figure 3 shows a cover for ventilation chimneys with a flat upper part (1) and foamed-on cone (2)

FIG. 4 shows a separate cone for flat covers with a convex underside.

Both shapes have an eaves edge (3), which is due to the smaller cone diameter compared to the upper part of the cover arises.

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Claims (4)

REQUIRED Claims Lid for ventilation chimneys (1) characterized in that the underside a cone (2) is foamed. 2.) Lid according to claim 1, characterized in that that a cone (2) made separately from the upper part of the lid (1) and subsequently foamed, glued, clamped or connected to the upper part with the help of screws, dowels, clamps or the like will. 3.) Lid according to claims 1, 2 characterized in that the cone diameter is less than that of the upper part of the lid, so that a circumferential eaves edge (3) arises. 4.) Lid according to claims 1, 2, 3 characterized g, that the lid is covered with cardboard, sheet metal, plastic or a mineral material. 709886/031 1
ORIGINAL INSPECTED