Static structures (e.g. – buildings) – Enclosure or cover – with supplemental fluid-guiding port... – Attic vent
Patent
1994-08-18
1996-07-16
Friedman, Carl D.
Static structures (e.g., buildings)
Enclosure or cover, with supplemental fluid-guiding port...
Attic vent
52198, 52219, 285189, 454271, 454366, E04D 1317, E04H 1514
Patent
active
055355595
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a ventilating device for mounting in a plastic foil or a similar flexible material for ventilating an air space under the foil and comprising a comparatively short pipe with a collar around one end thereof.
Without being limited to this purpose, the invention especially aims at providing a simple and easily mountable ventilating device to be mounted in a water-tight foil positioned under a roof covering in order to ventilate the air space under such foil against the roof covering.
Due to leaks in a roof covering a water-tight foil is often placed below the covering when it is impossible to tighten the roof covering from the inside because of an internal insulation. In such places in the roof where trimmings for e.g. skylights or chimneys are provided for and where the passage of the air from the air space below the foil to the roof covering is consequently impeded, a venthole has to be mounted in order to create sufficient ventilation for avoiding dew which might seep through the layers of the roof.
From the Danish Published Specification No. 147365 a ventilating device of the kind referred to above is known in which a layer of a weather-resisting adhesive has been applied to the underside of the collar turning away from the pipe.
This known ventilating device is mounted in the wanted place by glueing it on the upper side of the foil and then cutting away the covered area of the foil inside the ventilating device. Besides creating circulation from the underside of the foil to the roof covering, through the leaks of which the air will then escape into the atmosphere, the ventilating device will effectively prevent rainwater, seeping down the foil under the roof covering, from penetrating through the foil where the ventilating device has been placed as the water will thus run round the ventilation device.
However, mounting this known ventilating device is a rather time-consuming operation, and in practice it has been found that under certain conditions, e.g. when the foil is stiff with cold, moist or is smudgy, it is difficult to make the adhesion between the foil and the collar of the ventilating device sufficiently watertight to avoid water seeping through the foil.
From U.S. Pat. No. 3,892,169 a rather complicated embodiment is known, in which the ventilating device comprises a lower collar which is placed in the foil from the underside thereof and is coupled with a collar element which is mounted from the outer side of the foil and to which the ventilating pipe stub is secured. The coupling of two seperate elements, which have to be mounted from either side of the foil makes the mounting difficult.
These drawbacks are avoided with the ventilating device according to the invention, which is characterized in that the collar comprises an upper wall and a lower wall firmly connected therewith to be placed on either side of the foil around an opening therein corresponding to the light opening of the pipe, and that the lower wall of the collar is provided with a slit obliquely directed towards the pipe for mounting the ventilating device from one side of the foil by means of a spiral movement .
A ventilating device according to the invention will be further explained by means of the drawing, in which
FIGS. 1 and 2 in perspective shows an embodiment of the ventilating device, from the upper side and the lower side, respectively;
FIG. 3 is a cross-sectional view of the slit in the collar of the ventilating device;
FIG. 4 shows the ventilating device placed in a roof covering; and
FIG. 5 shows the ventilating device mounted in a vertical wall of reinforced plastic material.
The ventilating device 4 comprises an obliquely cut pipe 10 of weather-resisting plastic material with a collar 11 mounted at a right angle to the pipe on the end opposite the oblique cut.
As will be seen from FIGS. 1-3, the collar 11 is double-walled having an upper wall 12 and a lower wall 13 with a narrow interspace for mounting the ventilating device on the upper wall 12 and the lower wall 13 on either side of the
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Damp-Vent Company Brochure, Bettendorf, Iowa, Mar. 1952.
Nielsen Henning Z.
Solbeck Peter
Friedman Carl D.
Polysheet A/S
Saladino Laura A.
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