GB2137335A - Ventilator - Google Patents

Abstract

A ventilator comprises a housing (10) for inserting in an aperture (23) of a panel (20) so that a flange (14) co-operates with an inner surface (21) of the panel (20) and a component (11) having a plurality of projecting members (18) for engaging an outer surface (22) of the panel (20). The housing (10) and the component (11) are secured together by a bolt (19) whereby the panel (20) is engaged between the flange (40) and the projecting members (18) to secure firmly the ventilator relative to the panel (20). In an alternative embodiment, the component is formed as a disc with members projecting from the edge thereof so that the component functions as a storm-guard for the louvres (13). <IMAGE>

Description

SPECIFICATION Ventilator This invention relates to ventilators and, particularly, to ventilators ofthetype comprising a housing for inserting in an aperture in a panel and a componentfor co-operating with the housing so as to secure the ventilator relative to the panel.

Generally, the housing comprises a cylindrical portion having an axially extending external thread and a radially outwardly extending circumferential flange. The component generally comprises a cylin drical portion having an internal axially extending thread for co-operating with the tread of the housing and a radially outwardly extending circumferential flange.

In use, the housing extends through an aperture in a panel and the component is screwed onto the housing so that opposite facing surfacesofthe panel are engaged respectivelybytheflangeofthe housing and the flange ofthe component.

A disadvantage of such ventilators isthatthere is a tendencyfor the screwth readed connection of the housing and the component to unscrew relative one to anotherwiththe resultthattheflanges no longer firmly engage the respective opposite facing surfaces ofthe panel and, in consequence, the ventilator tends to vibrate relative to the panel when subjected to air currents of high velocity.

According to the present invention, there is provided a ventilator comprising: a housing for inserting in an aperture in a panel, the housing having an outwardly extending flange, a componentforco-operating with the housing, the component having a support member and a projecting member projecting from the support member, and fastening meansforfastening the housing and the component relative to the panel.

so that, in use, a projecting member projects in a direction substantially parallel to a longitudinal axis passing through the aperture and operation ofthe fastening means causes the flange and the projecting memberto be urged into engagement with opposite facing surfaces respectively of the panel whereby the ventilator is secured relative to the panel.

In this manner, the support member is urged towards an adjacent surface of the panel and, when the projecting member engages the surface, the componentisundertension due to the fastening means. Since, while the ventilator is mounted relative to the panel, the component is undertension, any tendency forthe housing and the components to become disengaged from the panel is either eliminated or reduced to a minimum.

The ventilator may be provided with a plurality said projecting members.

In this manner, the component may comprise a storm-guard wherein the support member, the projecting members and an adjacent surface of the panel together define a plurality ofopeningsthrough which air currents may pass.

Following is a description, bywayofexample only and with reference to the accompanying drawings, of one method of carrying the invention into effect.

In the drawings: Figure lisa diagrammatic representation of one exampleof a ventilator in accordancewiththe present invention and, Figure 2 is a diagrammatic representation of another embodiment a ventilator in accordance with the present invention.

Referring now to Figure 1 of the drawings, there is shown a ventilator comprising a housing 10 and a component 11 for co-operating therewith.

The housing comprises a cylindrical portion 12 having spaced parallel diametrically extending louvres 13. An end portion of the cylindrical portion 12 has an integral radially outwardly extending circumferential flange 14. The cylindrical portion 12 is provided with a central longitudinally extending bore 15.

The component 11 comprises a spacer 16 having three arms 17 extending radially and outwardly therefrom, each of the arms 17 being spaced equidistantfrom an adjacent arm. Each of the arms is provided with an integral projecting member at an outer end portion thereof, the projecting members 18 extending in the same direction substantially parallel to the central longitudinal axis of the spacer 16. An end portion of the spacer 16 remote from the junction of the arms 17 is provided with a tapped recess (not shown) for co-operating with the shank of a bolt 19.

The housing 10 and component 11 are adapted to co-operate with a panel 20 having opposite facing surfaces 21 and 22, the panel being provided with a circular aperture 23 having a diameter in excess of the diameter of the cylindrical portion 12 of the housing 11 but less than the combined diameter ofthe cylindrical portion 12 and the flange 14. The housing 10 is positioned relative to the panel 20 such thatthe cylindrical portion 12 is located in the aperture 23 and asurfaceoftheflange 14 is located adjacent the surface 21 of the panel 20. The shank of the bolt 19 is inserted through the bore 15 and is screwed into the tapped recessofthe spacer 16wherebythe compo- nent 11 is moved in an axial direction of the cylindrical portion 12 of the housing 10 towards the surface 22 of the panel 20.

As the shank of the bolt is screwed relative to the spacer 16, the end faces of the projecting members 18 engage the surface 22 ofthe panel 20 and, subsequently, an end face ofthe spacer 16 remote from the junction of the arms 17 abuts an adjacent surface of the cylindrical portion 12. In this position,the arms 17 are in tension with a resultthatthe opposite facing surfaces 21 and 22 of the panel 20 arefirmy engaged by adjacent surfaces respectively of the flange 14 and the projecting members 18 of the arms 17.

Referring now to Figure 2 ofthe drawings, there is shown the housing 10, the bolt 19 and the panel 20 but the component 11 has been replaced by a component 24.

The component 24 comprises a disc 25 having a spacer 26 extending centrally therefrom, the spacer 26 being similarto the spacer 16 of the component 11.

The disc 25 is provided with a circumferential skirt 27 projecting in the same axial direction as the spacer 26.

The skirt 27 is provided with a plurality of projecting members 28 spaced one from another in a circumferential direction ofthe skirt 27.

The component 24 is connected to the housing 10 by means ofthe bolt 19 in the same mannerthatthe component 11 is connected to the housing 10 and, when located relative to the panel 20, the surfaces 21 and 22 ofthe panel 20 are engaged respectively by an adjacent surface oftheflange 14 of the housing 10 and adjacent surfaces ofthe projecting members 28.

Unlike the component 11 in which the arms 17 provided negligible resistanceto wind and air currents moving towards the louvres 13, the disc 25, skirt 27 and projecting member28 ofthecomponent24block wind and air currents moving towards the louvres 13 and only permit passage of moving air streams through openings defined by adjacent projecting members 28 and each portion of the skirt 27 extending between adjacent projecting members 28 and the surface 22 ofthe panel 20.

Therefore,the component 24functions as a stormguard in that only restricted flow of air currents through the louvres 13 of the housing 10 is possible.

Claims (6)

1. Aventilatorcomprising:- a housing for inserting in an aperture in a panel,the housing having an outwardly extending flange, a componentforco-operating with the housing, the component having a support member and a project ing member projecting from the support member, and fastening meansforfasteningthe housing and the componentrelativetothepanelsothat, in use, the projecting member projects in a direction substantial ly parallel to the longitudinal axis passing through the aperture and operation of the fastening means causes the flange and the projecting member to be urged into engagement with opposite facing surfaces respective ly of the panel whereby the ventilator is secured relative to the panel.

2. Aventilatoras claimed in claim 1 whereinthere is provided a plurality of said projecting members.

3. Aventilatoras claimed in Claim 2wherein the fastening meansconnectsthehousingandthe component.

4. Aventilator as claimed in Claim 3 wherein the fastening means comprises a pair of co-operating threaded members.

5. Aventilator as claimed in Claim 4wherein one of threaded members is integral with the component.

6. A ventilator substantially as hereinbefore described and as illustrated in the accompanying drawings.

6. Aventilator as claimed in Claim 5 wherein the otherthreaded member of said pairofthreaded members is a bolt.

7. A ventilator substantially as hereinbefore described and as illustrated in the accompanying drawings.

New ortextually amended claims have been filed as follows: CLAIMS

1. Aventilatorcomprising: a first componentfor location relative to an aperture in a panel and having an abutment surface for engaging a first su rface of the panel.

a second component for co-operating with the first component, the second component having a support member and a projecting member projecting from the support memberfor engaging a second surace of the panel, and means for connecting the components one to another so that, in use, the abutment surface and the projecting member are urged into engagement with the first and second surfaces respectivelywhereby the ventilator is secured relative to the panel.

2. Aventilator as claimed in Claim 1 wherein there is provided a plurality of said projecting rnembers.

3. A ventilator as claimed in Claim 2 wherein the connecting means comprises a pairofco-operating threaded members.

4. A ventilator as claimed in Claim 3 wherein one of said threaded members is integral with the second component

5. A ventilator as claimed in Claim 4 wherein the other threaded member of said pair of threaded members is a bolt.