GB2150686A

GB2150686A - Ventilation devices

Info

Publication number: GB2150686A
Application number: GB08429205A
Authority: GB
Inventors: George William Bambrough
Original assignee: Glendale Engineering Ltd
Current assignee: Glendale Engineering Ltd
Priority date: 1983-11-29
Filing date: 1984-11-19
Publication date: 1985-07-03
Also published as: GB2150686B; GB8331840D0; GB8429205D0

Abstract

The ventilation device for a loft space comprises a metal flashing 1 which serves as a roof slate, an elastomeric collar 2 which is bonded to the upper surface of the flashing to bound an aperture therein. and a ventilation grill 3 fitted in an aperture formed in a frontal region of the collar 2. The grill is push fitted into the deformable collar and has louvres 9. In a modification, a rain deflector is fitted to the inside of the grill. <IMAGE>

Description

SPECIFICATION Ventilation devices This invention relates to ventilation devices.

According to the invention there is provided a ventilation device comprising a substantially flat metal flashing which, in use, serves as a roof slate, the flashing having a ventilation aperture therein, a hollow elastomeric collar having at its lower end an integral flange at which the collar is bonded to the upper surface of the flashing so that the collar bounds the ventilation aperture in the flashing, the collar having a frontal region, considered when the flashing serves as a roof slate, formed with an aperture therein, and a ventilation grill fitted to the collar by being mounted in the aperture thereof.

With the advent of efficient insulation of loft spaces particularly in domestic dwellings, it is found that because hot air is unable to escape from the living and sleeping areas upwards into the loft that there is no air movement therein, and this can result in dampness in the loft space causing mildew and mould to grow.

A ventilation device constructed in accordance with the invention provides a simple means for ventilating loft spaces and so overcome that problem.

In order that the invention may be well understood there will now be described two embodiments thereof, given by way of example, reference being had to the accompanying drawings, in which: Figure 1 is a perspective view of a ventilation device partly broken away; Figure 2 is a front elevation of collar and ventilation grill of the same ventilation device: Figure 3 is a sectioned side elevation of the same ventilation device before the ventilation grill thereof is fitted: Figure 4 is a scrap sectioned side elevation showing the ventilation grill fitted into the collar of the ventilation device shown in Fig.

1; Figure 5 is a perspective view showing a rain diverter and the ventilation grill of a modified ventilation device; and Figure 6 is a scrap sectioned side elevation of the modified ventilation device shown in Fig. 5.

In the various Figures, like parts are de- noted by like reference numerals.

The ventilation device shown in Figs. 1 to 4 comprises 3 metal flashing 1, an elastomeric collar 2 secured to the flashing, and a ventilation grill 3 fitted into the collar.

The flashing 1 is preferably an aluminium pressing, and the collar 2 a one-piece moulding of EPDM rubber. The ventilation grill 3 is preferably a one-piece PVC moulding.

The flashing 1 comprises a substantially flat base 4 which is apertured at 5. The collar 2 bounds the aperture 5 and makes an adhesional bond with the upper surface of the base 4 at an integral flange 6 of the coilar. In use, the flashing 1 would serve as a roof slate, and the rearward region 4a of the base 4 would be overlaid with upper roofing tiles with the forward base region 4b overlapping the lower tiles.

The collar 2 is hollow and generally of truncated frusto-conical section with its frontal region formed with a flat mounting surface 7 and containing a square cross-section aperture 8. The ventilation grill 3 has fixed louvres 9 bounded by a hollow square cross-section internal spigot 10 which is slightly larger in dimensions than the square aperture 8.

Thereby, the ventilation grill 3 can be fitted to the collar 2 simply hy pushing the spigot 10 into the aperture 8 whereupon, because of the resiliency of the collar material, the collar will deform as shown in Fig. 4 securely to hold the ventilation grill in position with the spigot frictionally engaged in the aperture and making a seal with the deformed collar margin 11 around the aperture.

In the modified ventilation device shown in Figs. 5 and 6, a rain diverter 1 2 is provided to prevent driving rain from passing into the loft space. The rain diverter 1 2 is fitted inside the collar 2 upon the internal spigot 10 of the ventilation grill 3. The marginal surface of the collar 2 bounding its square aperture 8 is strengthened by a bead 1 3 which is sandwiched between the ventilation grill 3 and the rain diverter 1 2. The bead 1 3 seals against the spigot 10 which, as before, is entered as a frictional fit in the square aperture 8.A peripheral marginal portion 14 of the rain diverter 1 2 is fashioned so that it can be mounted upon the spigot 10 and be solvent cemented at 1 16 thereto to make a water tight seal with the spigot. An radially outward flange 1 5 around the rain diverter periphery 1 4 locates against the bead 1 3 so that the collar 3 is prevented from deforming inwaidly when the spigot 10 is pushed into the square aperture 8 as in the previous embodiment.

The rain diverter 1 2 is a PVC moulding.

Either of the disclosed ventilation devices would be used on roofs of 30 to 45 pitch, and the flat mounting surface 7 of the collar 2 is so inclined relative to the flashing base 4 that in use it will either extend substantially vertically or make a reverse rake and incline slightly rearwardly. The purpose of this is to so orientate the ventilation grill 3 as to inhibit the ingress of rain through its louvres 9 into the loft space.

The described and illistrated ventilation devices each thus provides a roof weathering slate carrying a grill serving to ventilate the loft space.

1. A ventilation device comprising a substantially flat metal flashing which, in use,

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Ventilation devices This invention relates to ventilation devices. According to the invention there is provided a ventilation device comprising a substantially flat metal flashing which, in use, serves as a roof slate, the flashing having a ventilation aperture therein, a hollow elastomeric collar having at its lower end an integral flange at which the collar is bonded to the upper surface of the flashing so that the collar bounds the ventilation aperture in the flashing, the collar having a frontal region, considered when the flashing serves as a roof slate, formed with an aperture therein, and a ventilation grill fitted to the collar by being mounted in the aperture thereof. With the advent of efficient insulation of loft spaces particularly in domestic dwellings, it is found that because hot air is unable to escape from the living and sleeping areas upwards into the loft that there is no air movement therein, and this can result in dampness in the loft space causing mildew and mould to grow. A ventilation device constructed in accordance with the invention provides a simple means for ventilating loft spaces and so overcome that problem. In order that the invention may be well understood there will now be described two embodiments thereof, given by way of example, reference being had to the accompanying drawings, in which: Figure 1 is a perspective view of a ventilation device partly broken away; Figure 2 is a front elevation of collar and ventilation grill of the same ventilation device: Figure 3 is a sectioned side elevation of the same ventilation device before the ventilation grill thereof is fitted: Figure 4 is a scrap sectioned side elevation showing the ventilation grill fitted into the collar of the ventilation device shown in Fig. 1; Figure 5 is a perspective view showing a rain diverter and the ventilation grill of a modified ventilation device; and Figure 6 is a scrap sectioned side elevation of the modified ventilation device shown in Fig. 5. In the various Figures, like parts are de- noted by like reference numerals. The ventilation device shown in Figs. 1 to 4 comprises 3 metal flashing 1, an elastomeric collar 2 secured to the flashing, and a ventilation grill 3 fitted into the collar. The flashing 1 is preferably an aluminium pressing, and the collar 2 a one-piece moulding of EPDM rubber. The ventilation grill 3 is preferably a one-piece PVC moulding. The flashing 1 comprises a substantially flat base 4 which is apertured at 5. The collar 2 bounds the aperture 5 and makes an adhesional bond with the upper surface of the base 4 at an integral flange 6 of the coilar. In use, the flashing 1 would serve as a roof slate, and the rearward region 4a of the base 4 would be overlaid with upper roofing tiles with the forward base region 4b overlapping the lower tiles. The collar 2 is hollow and generally of truncated frusto-conical section with its frontal region formed with a flat mounting surface 7 and containing a square cross-section aperture 8. The ventilation grill 3 has fixed louvres 9 bounded by a hollow square cross-section internal spigot 10 which is slightly larger in dimensions than the square aperture 8. Thereby, the ventilation grill 3 can be fitted to the collar 2 simply hy pushing the spigot 10 into the aperture 8 whereupon, because of the resiliency of the collar material, the collar will deform as shown in Fig. 4 securely to hold the ventilation grill in position with the spigot frictionally engaged in the aperture and making a seal with the deformed collar margin 11 around the aperture. In the modified ventilation device shown in Figs. 5 and 6, a rain diverter 1 2 is provided to prevent driving rain from passing into the loft space. The rain diverter 1 2 is fitted inside the collar 2 upon the internal spigot 10 of the ventilation grill 3. The marginal surface of the collar 2 bounding its square aperture 8 is strengthened by a bead 1 3 which is sandwiched between the ventilation grill 3 and the rain diverter 1 2. The bead 1 3 seals against the spigot 10 which, as before, is entered as a frictional fit in the square aperture 8.A peripheral marginal portion 14 of the rain diverter 1 2 is fashioned so that it can be mounted upon the spigot 10 and be solvent cemented at 1 16 thereto to make a water tight seal with the spigot. An radially outward flange 1 5 around the rain diverter periphery 1 4 locates against the bead 1 3 so that the collar 3 is prevented from deforming inwaidly when the spigot 10 is pushed into the square aperture 8 as in the previous embodiment. The rain diverter 1 2 is a PVC moulding. Either of the disclosed ventilation devices would be used on roofs of 30 to 45 pitch, and the flat mounting surface 7 of the collar 2 is so inclined relative to the flashing base 4 that in use it will either extend substantially vertically or make a reverse rake and incline slightly rearwardly. The purpose of this is to so orientate the ventilation grill 3 as to inhibit the ingress of rain through its louvres 9 into the loft space. The described and illistrated ventilation devices each thus provides a roof weathering slate carrying a grill serving to ventilate the loft space. CLAIMS

1. A ventilation device comprising a substantially flat metal flashing which, in use, serves as a roof slate, the flashing having a ventilation aperture therein, a hollow elastomeric collar having at its lower end an integral flange at which the collar is bonded to the upper surface of the flashing so that the collar bounds the ventilation aperture in the flashing, the collar having a frontal region, considered when the flashing serves as a roof slate, formed with an aperture therein, and a ventiaction grill fitted to the collar by being mounted in the aperture thereof.

2. A ventilation device as claimed in claim 1, wherein the ventilation grill has a spigot which is frictionally engaged in the aperture formed in the frontal region of the collar by which the ventilation grill is fitted to the collar.

3. A ventilation device as claimed in claim 2, wherein the cross-sectional dimensions of the spigot are larger than those of the aperture formed in the frontal region of the collar, the spigot being a push fit in that aperture by which to be frictionally engaged therein.

4. A ventilation device as claimed in claim 3, wherein the resiliency of the collar material is such that the collar deforms when the spigot is entered as a push fit into the collar aperture thereby to make a seal with, and frictionally engage, the spigot.

5. A ventilation device as claimed in any of claims 2 to 4, wherein the spigot and the collar aperture are of square cross-section.

6. A ventilation device as claimed in any of claims 2 to 5, including a rain diverter mounted inside the collar upon the spigot of the ventilation grill.

7. A ventilation device as claimed in claim 6, wherein the rain diverter makes a solvent cement joint with the spigot.

8. A ventilation device as claimed in claim 6 or claim 7, wherein the marginal surface of the collar bounding the aperture is strengthened by a bead which is sandwiched between the ventilation grill and the rain diverter.

9. A ventilation device as claimed in any of the preceding claims, wherein the frontal region of the collar is formed with a flat mounting surface in which the collar aperture is formed, the ventilation grill being mounted against that mounting surface.

10. A ventilation device as claimed in claim 9, wherein, when used on roofs of 30 to 45 pitch, the flat mounting surface of the collar is so angled relative to the flashing that it will either extend substantially vertically or make a reverse rake and incline rearwardly, by which to so orientate the ventilation grill as to inhibit the ingress of rain therethrough.

11. A ventilation device as claimed in any of the preceding claims, wherein the ventilation grill has fixed louvres.

1 2. A ventilation grill as claimed in any of the preceding claims, wherein the collar is generally of truncated frusto-conical section.

1 3. A ventilation device as claimed in any of the preceding claims, wherein the metal flashing is of aluminium.

14. A ventilation device as claimed in any of the preceding claims, wherein the collar is of EPDM rubber.

1 5. A ventilation device as claimed in any of the preceding claims, wherein the ventilation grill is a PVC moulding.

1 6. A ventilation device as claimed in any of claims 6 to 8, wherein the rain diverter is a PVC moulding.

1 7. Either of the ventilation devices substantially as herein described with reference to the accompanying drawings.