GB2333588A - Louvred ventilators - Google Patents

Louvred ventilators Download PDF

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Publication number
GB2333588A
GB2333588A GB9801319A GB9801319A GB2333588A GB 2333588 A GB2333588 A GB 2333588A GB 9801319 A GB9801319 A GB 9801319A GB 9801319 A GB9801319 A GB 9801319A GB 2333588 A GB2333588 A GB 2333588A
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GB
United Kingdom
Prior art keywords
ventilation apparatus
blades
securement
securement means
assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9801319A
Other versions
GB9801319D0 (en
GB2333588B (en
Inventor
Ian Brown
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GILBERTS
Original Assignee
GILBERTS
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Filing date
Publication date
Application filed by GILBERTS filed Critical GILBERTS
Priority to GB9801319A priority Critical patent/GB2333588B/en
Publication of GB9801319D0 publication Critical patent/GB9801319D0/en
Publication of GB2333588A publication Critical patent/GB2333588A/en
Application granted granted Critical
Publication of GB2333588B publication Critical patent/GB2333588B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082Grilles, registers or guards
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00Details or features not otherwise provided for
    • F24F2221/14Details or features not otherwise provided for mounted on the ceiling

Abstract

A ventilation apparatus comprises a core 10 which is securable in a square frame secured in a ceiling of a room or the like. The core 10 comprises square blade assemblies 12a, 12b, 12c each of which comprises four blades 13 and a centre member 12d. The assemblies and centre member are secured together by means of four diagonally extended rigid back straps 14. The back straps are secured to corner brackets 16 which are also arranged to secure adjacent blades to one another by planar parts of the brackets being slidably received in respective channels 20 in the blades and then the channels are deformed inwardly slightly to prevent disengagement of the brackets from the channels. The back straps also support spring pins 18 which are arranged to releasably engage within slots provided in the square frame. Various other arrangements of blades, for positioning in various regions of a room (or the like) are also described.

Description

VENTILATION This invention relates to ventilation and particularly, although not exclusively, relates to a ventilation apparatus, for example a louvred face diffuser.
A known louvred face diffuser 2 is shown diagrammatically in figures 1 and 2 wherein figure 1 is a front plan view of a diffuser and figure 2 is a simplified cross-section along line II-II of figure 1. The diffuser 2 includes blades 4 which include an air flow deflecting portion 6 extending at an acute angle to a first direction represented by arrow 7 and an upstanding portion 8 which extends substantially parallel to the first direction. The assembly of figure 1 includes a plurality of square assemblies each comprising four blades 4 which are fixed together at their ends using brackets which are rivetted to the upstanding portions 8 thereof. The square assemblies are secured to one another using back straps (not shown) which extends diagonally across the square assemblies and are also secured to the brackets by rivetting, in order to define a core which is releasably securable within a housing 9 which may be arranged within a ceiling in a room. Releasable securement of the core in the housing may be achieved using spring loaded pins which are secured to upstanding portions 8 of respective blades and which are arranged to be received within drilled holes in selected walls of the housing.
Disadvantageously, the diffuser 2 is relatively timeconsuming to manufacture since it requires the drilling and/or rivetting of a relatively large number of parts and, additionally, it is relatively heavy, especially since the blades include a-relatively large amount of material.
It is an object of the present invention to address problems associated with known ventilation apparatus.
According to a first aspect of the invention, there is provided ventilation apparatus comprising a first louvre blade which extends in a first direction and a second louvre blade which extends in a second direction, wherein ends of said first and second blades are fixed relative to one another using a first securement means which cooperates with respective channel means of the first and second blades, restrictor means being provided for restricting movement of the first and second blades relative to said first securement means.
An angle of less than 1800, preferably less than 1350, more preferably less than 100" may be defined between said first and second directions. Preferably, said first and second louvre blades extend at an angle of about 900 to one another. Said first and second louvre blades preferably extend in substantially the same plane which plane suitably extends substantially transversely to the direction of air flow through the apparatus.
Preferably, respective ends of said first and second blades about one another. Preferably, end surfaces of respective ends of said first and second blades extend at an angle of about 45" to said first and second directions.
Said end surfaces are preferably substantially linear.
Said channel means of said first and/or said second blades are preferably integral parts of said blades. Said channel means may be manufacturable as a unitary part of said respective blades, suitably in an extrusion process.
Said first and/or second blades are preferably extruded, preferably from aluminium. Said first and said second blades preferably have substantially the same cross-section.
Said channel means of said first blade preferably includes a substantially planar base surface which is a component of a base of the channel means. Said base surface preferably faces inwardly of the apparatus, suitably in a direction away from a room in which the apparatus may be arranged in use. A second surface of said base is also preferably planar and is suitably an outer surface of said first blade which faces into a room in which the apparatus may be arranged in use. A first channel element preferably projects away from a region of said base surface at or towards one end thereof and a second channel element preferably projects away from a region of said base surface at or towards an opposite end thereof. Said first and/or second channel elements preferably include respective inwardly turned lips which preferably extend substantially parallel to said base surface at least a long a major portion of their length.
Preferably, each of said inwardly turned lips has a width which is less than one-quarter, more preferably less than one-sixth, especially less than one-eighth of the width of said base surface in a region between said first and second ends.
Said channel means of said second blade may have any feature of said channel means of said first blade described above.
Said first securement means preferably includes a first male securement element which is preferably arranged to engage said channel means of said first blade. Said first male securement element preferably includes a planar portion which is preferably arranged to make face to face contact with a planar surface of said channel means of said first blade, for example said planar base surface of said first blade, when provided as described above.
Said first securement means preferably includes a second male securement element which is preferably arranged to engage said channel means of said second blade. Said second male securement element preferably includes a planar portion which is preferably arranged to make face to face contact with a planar surface of said channel means of said second blade, for example a said planar base surface of said second blade, when provided as described above.
Said first and second male securement elements are preferably integral parts of said first securement means.
Preferably, the planar surfaces of said first and second male securement elements are angled relative to one another, suitably at an angle of greater than 90 , preferably greater than 1109, more preferably greater than 125". Said angle is preferably less than 1800, preferably less than 1600, more preferably less than 145 .
Said restrictor means is preferably arranged to restrict, preferably to block, sliding movement of said first securement means relative to said channel means.
Said restrictor means is preferably substantially permanent in that it is suitably not arranged to be quickreleased and re-engaged. Preferably, said restrictor means does not penetrate said first and/or said second blades. Thus, preferably, it is not a rivet or nut/bolt arrangement or the like. Said restrictor means preferably comprises a projecting part which suitably projects into a region of said channel means of said first and/or said second blades thereby to block movement of said first securement means within said channel means. Said projecting part is preferably fixed to a said blade and, preferably, is an integral part thereof. Preferably, said restrictor means, for example said projecting part, comprises a deformed part of said first and/or said second blade. Where the first and/or said second blades include first and/or second channel elements as described above, said restrictor means may comprise a deformed portion of at least one of said elements, wherein, suitably, said deformed portion projects into the channel means.
Preferably, said restrictor means includes a plurality of projecting parts as described. At least one projecting part is preferably associated with said first blade and at least one is preferably associated with said second blade.
Preferably, said first securement means is arranged to cooperate with said restrictor means. Said first securement means may be arranged to accommodate a region of said restrictor means. For example, said first securement means may include one or a plurality of openings for accommodating a region, for example said projecting part described above when provided, of said restrictor means.
Preferably, said restrictor means, especially a said projecting part described above when provided, is arranged to penetrate a part of said first securement means, for example by passing into a said opening of said first securement means when provided.
Said first louvre blade, said second louvre blade and said first securement means preferably define a louvre assembly. Said louvre assembly may include a third louvre blade having any feature the first and/or second louvre blades described herein, which third blade may be secured to said second louvre blade using a said first securement means. Said louvre assembly may include a fourth louvre blade, having any feature of the first and/or second louvre blades described herein and being secured between said third and said first blades using respective first securement means.
Preferably, said ventilation apparatus includes a plurality of louvre assemblies as described above. Said louvre assemblies are preferably secured together, suitably in an array, with blades of the assemblies extending parallel to one another, by an assembly securement means. Said assembly securement means preferably extends between aligned first securement means of the assemblies. For example, said assembly securement means may engage a first securement means of a first louvre assembly and a first securement means of a second louvre assembly. Preferably, said assembly securement means is secured to each first securement means of a louvre assembly that it engages. Preferably, a planar part of said assembly securement means abuts a planar securement part of a said first securement means. Said planar securement part may be an integral part of said first securement means. It is preferably a part of a bracket which projects away from the said first and second male securement elements of said first securement means when provided. Securement of said assembly securement means to said first securement means may include use of male fixing means, for example rivets, engaging respective openings in the assembly securement means and said first securement means. Said assembly securement means preferably comprises an elongate member, for example a back-strap.
Said assembly securement means preferably includes supports means for securing, especially releasably securing, said ventilation apparatus within a housing.
Said support means preferably include a male element, for example a pin which may be resiliently loaded for engaging an opening in the housing.
Said apparatus may include one assembly securement means which extends diagonally across said ventilation apparatus. Preferably, said apparatus includes at least two assembly securement means which preferably extend between different diagonals of the ventilation apparatus.
According to a second aspect of the invention, there is provided a ventilation apparatus comprising a first louvre blade which extends in a first direction and a second louvre blade which extends in a second direction, wherein ends of said first and second blades are fixed relative to one another using a first securement means which makes face to face contact with a first surface of a base of said first louvre blade which first surface faces inwardly of the apparatus and wherein a second surface of said base faces outwardly and is suitably an outermost air deflecting surface of the apparatus.
Said first securement means preferably also makes face to face contact with a first surface of a base of the second louvre blade which base is arranged as described above for the base of said first louvre blade.
According to a third aspect of the present invention, there is provided a housing for a ventilation apparatus which includes one or a plurality of support means for releasably securing the apparatus within the housing, where said housing includes at least two elongate, preferably substantially linear, side walls which include elongate openings along at least one quarter, preferably at least one third, more preferably at least one half of their length. Preferably said elongate openings extend along at least 75% preferably substantially the whole length of both of said side walls. Said elongate openings which are preferably channels, preferably are arranged to slidably receive said support means. Preferably, the housing includes two other elongate side walls having the features of the side walls described.
The invention extends to an assembly comprising a ventilation apparatus and a housing. The assembly may include means defining an air flow passageway, upstream of the housing.
According to a fourth aspect of the invention, there is provided a method of manufacturing a ventilation apparatus comprising securing ends of first and second blades relative to one another, preferably by positioning a first securement means within respective channel means of said first and second blades and, preferably, providing a restrictor means for restricting movement of the first and second blades relative to said first securement means.
The invention extends to the use of ventilation apparatus for controlling air flow in a confined space, for example a room.
Any feature of any aspect of any invention or embodiment described herein may be combined with any feature of any aspect of any other invention or embodiment described herein.
Specific embodiments of the invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, in which: Figure 1 is a front plan view of a known diffuser described above; Figure 2 is a cross-section alone line II-II of figure 1; Figure 3 is a rear plan view of a core of a diffuser; Figure 4 is a view in the direction of arrow IV of figure 3; Figure 5 is an enlarged view of a region V of figure 3; Figure 6 is a view of a blade of the core from one side; Figure 7 is a view of the blade from an opposite side to that shown in figure 6; Figure 8 is a side view of a corner bracket; Figure 9 is a view in the direction of arrow IX of figure 8; Figure 10 is a plan view of a back strap; Figure 11 is a side elevation, partly in crosssection, of the back strap of figure 10; Figure 12 is a side view of a central member of the core; Figure 13 is plan view in the direction of arrow XII of the member of figure 12; Figure 14 is a rear plan view of a core of a rectangular diffuser; Figure 15 is a view in the direction of arrow XV of figure 14; Figure 16 is a rear plan view of a core of a threeway diffuser; Figure 17 is a view in the direction of arrow XVII of figure 16; Figure 18 is a view in the direction of arrow XVII I of figure 16; Figure 19 is a rear plan view of a core of a two-way diffuser; and Figure 20 is a view in the direction of arrow XX of figure 19.
In the figures, the same or similar parts are annotated with the same reference numerals.
A diffuser comprises a core 10 which is arranged to be releasably secured in a square frame (not shown) which is secured in the ceiling of a room (or the like). Air supply apparatus is provided upstream of the frame.
The core 10 comprises square blade assemblies 12a, 12b, 12c each comprising four blades 13 and a centre member 12d which are secured together by means of four diagonally extending rigid back straps 14. The back straps are secured to corner brackets 16 which are also arranged to secure adjacent blades to one another. The back straps also support spring pins 18 which are arranged to releasably engage within slots provided in the square frame.
Parts of the diffuser are described in greater detail below.
Referring to figures 6 and 7, the blades 13 comprise aluminium extrusions which are cut so that adjacent blades of the assemblies 12 can be mitred to one another. The extrusions define a channel 20 which is arranged to receive part of a corner bracket 16 as described hereinafter.
Referring to figures 5, 8 and 9, a corner bracket 16 is made of pressed steel which is bent into the desired shape. The bracket includes first and second planar parts 22, 24 which are arranged at an angle of about 139C to one another. Cut out regions 26, 28 are defined in the parts 22, 24. An L-shaped securement member 30 which includes a hole 32 extends upwardly from planar part 24.
A corner bracket 16 is used to secure adjacent blades 13 together as follows: Planar part 22 of the bracket 16 is slid into channel 20 of one blade and part 24 is slid into channel 20 of an adjacent blade and the arrangement is arranged in a jig.
The bracket 16 is secured in position simply by punching respective inwardly extending channel forming parts 34, 36 (Figure 6) at positions opposite respective cut-out regions 26, 28 so that an element (eg 38 - see figure 5) of the parts 34, 36 is deformed inwardly so that it extends into the regions 26, 28. Consequently, the corner bracket 16 is immobilised within the channels 20. It will be appreciated that, when so disposed, the securement member 30 projects away from the rear of the blades. It should also be noted that the top of upstanding part 80 (figure 6) is positioned directly below a part of the securement member 30 which presents the member 30 being inadvertently bent inwardly.
Each of the blades of the core may be secured as described above. When so arranged, each planar part 40 of the securement members 30 lie in substantially the same plane.
The central member 12d (Figures 12 and 13) may include an outward facing part 50 which may be stamped out of aluminium and a support part 52 which is X-shaped in plan view and includes planar regions 54. The member 12d is arranged in the jig such that planar regions 54 lie in the same plane as planar parts 40 of corner brackets 16.
Referring to figures 10 and 11, each back strap 14 may be made of a metal, for example steel or aluminium or a plastic material, and comprises a body 42 of channel section which includes holes 44 and a head 46 which also includes a hole 44. The head also includes aligned holes 48 within which a spring pin 18 can be arranged.
The back straps 14 are used to secure assemblies 12 together by laying each back strap diagonally across the assemblies in the jig so that the back straps make face to face contact with planar parts 40 of the corner brackets and planar regions 54 of assembly 12d. Then rivets are inserted through holes 44 in the back straps which are aligned with respective holes 32 in the corner brackets 30 and support 52. For additional strength, joining member 60 (figure 3) extends between one pair of diagonally opposed back straps 14.
The core 10 has been found to be cheaper to assemble than the core of figures 1 and 2 by virtue of reduced time for assembly and reduced materials costs.
The frame for receiving the core 10 may include inwardly facing elongate channels extending along each side of the frame, the channels being arranged to receive ends of spring pins 18. By providing channels in the frame, suitable as integral parts of the assembly (for example they may be formed in an extrusion process) the core can be easily engaged with the frame irrespective of the orientation of the core and frame.
As an alternative to the square core 10 described above, an elongated core 70, as shown in figures 14 and 15, may be provided for co-operation with a rectangular frame (not shown) secured in the ceiling. The core 70 is very similar to core 10, except that blades 13 which extend in the direction of arrow 72 are longer than those which extend in the direction of arrow 74. Consequently, central assembly 76 is modified compared to assembly 12d of core 10 and, in particular, two secondary back straps 78 are provided to secure blades 13d and 13e together. The back straps 78 include slots (not shown) into which upstanding parts 80 (Figure 6) are secured by welding.
The cores 10 and 70 described above are for four-way diffusers in that the blades are arranged to direct air from the diffuser through 360". However, for some situations a three-way diffuser (which directs air through 1800) or a two-way diffuser (which directs air through 90 ) may be required. A one-way diffuser is also possible.
A core 86 of a three-way diffuser (shown in figures 16 to 18) is similar to cores 10 and 70. In addition to a single secondary back strap 78, it includes a tertiary back strap 90 which engages blades in the same way as back strap 78 and additionally supports pins 92 which are arranged to engage a frame of the diffuser in the same way as pins 18 of figure 3.
A core 96 of a corner two-way diffuser (shown in figures 19 and 20) is similar to the cores described above. However, it includes a single back strap 14 which co-operates with corner brackets 16 for securing the blades together and two tertiary back straps 90a and 90b.
Rigid pins 92 extend from back straps 14 and 90a whilst two spring-loaded pins 18 extend from opposite ends of back strap 90b. Other arrangements of two-way diffusers may also be provided.
The reader's attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings) , or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

Claims (34)

  1. CLAIMS 1. A ventilation apparatus comprising a first louvre blade which extends in a first direction and a second louvre blade which extends in a second direction, wherein ends of said first and second blades are fixed relative to one another using a first securement means which cooperates with respective channel means of the first and second blades, restrictor means being provided for restricting movement of the first and second blades relative to said first securement means.
  2. 2. A ventilation apparatus according to Claim 1, wherein an angle of less than 1800 is defined between said first and second directions.
  3. 3. A ventilation apparatus according to any preceding claim, wherein said first and second louvre blades extend in substantially the same plane which plane extends substantially transversely to the direction of air flow through the apparatus.
  4. 4. A ventilation apparatus according to any preceding claim, wherein respective ends of said first and second blades abut one another, wherein end surfaces of respective ends of said first and second blades extend at an angle of about 450 to said first and second directions and said end surfaces are substantially linear.
  5. 5. A ventilation apparatus according to any preceding claim, wherein said channel means of said first and/or said second blades are integral parts of said blades.
  6. 6. A ventilation apparatus according to any preceding claim, wherein said channel means of said first blade includes a substantially planar base surface which is a component of a base of the channel means.
  7. 7. A ventilation apparatus according to Claim 6, wherein said base surface faces inwardly of the apparatus, in a direction away from a room in which the apparatus is arranged in use.
  8. 8. A ventilation apparatus according to Claims 6 or 7, wherein a first channel element projects away from a region of said base surface at or towards one end thereof, and a second channel element projects away from a region of said base surface at or towards an opposite end thereof.
  9. 9. A ventilation apparatus according to Claim 8, wherein said first and/or second channel elements include respective inwardly turned lips which extend substantially parallel to said base surface at least along a major portion of their length.
  10. 10. A ventilation apparatus according to any preceding claim, wherein said first securement means includes a first male securement element which is arranged to engage said channel means of said first blade and includes a second male securement element which is arranged to engage said channel means of said second blade.
  11. 11. A ventilation apparatus according to Claim 10, where in said first and second securement elements are integral parts of said first securement means.
  12. 12. A ventilation apparatus according to any preceding claim, wherein said restrictor means is arranged to restrict sliding movement of said first securement means relative to said channel means.
  13. 13. A ventilation apparatus according to any preceding claim, wherein said restrictor means does not penetrate said first and/or second blades.
  14. 14. A ventilation apparatus according to any preceding claim, wherein said restrictor means comprises a projecting part which projects into a region of said channel means of said first and/or second blades thereby to block movement of said first securement means within said channel means.
  15. 15. A ventilation apparatus according to any preceding claim, wherein said first louvre blade, said second louvre blade and said first securement means define a louvre assembly, and said louvre assembly includes a third louvre blade which is secured to said second louvre blade using a said first securement means.
  16. 16. A ventilation apparatus according to Claim 15, wherein said louvre assembly includes a fourth louvre blade secured between said third and said first blades using respective first securement means.
  17. 17. A ventilation apparatus according to Claim 15 or Claim 16, wherein said ventilation apparatus includes a plurality of louvre assemblies secured together, in an array with blades of the assemblies extending parallel to one another, by an assembly securement means.
  18. 18. A ventilation apparatus according to Claim 17, wherein said assembly securement means extends between aligned first securement means of the assemblies and said assembly securement means is secured to each first securement means of a louvre assembly that it engages.
  19. 19. A ventilation apparatus according to Claim 18, wherein a planar part of said assembly securement means abuts a planar securement part of said first securement means, said planar securement part comprising an integral part of said first securement means.
  20. 20. A ventilation apparatus according to Claim 19, wherein said planar securement part of said first securement means is a part of a bracket which projects away from first and second male securement means of said first securement means.
  21. 21. A ventilation apparatus according to any of Claims 17 to 20 including at least one assembly securement means which extends diagonally across said ventilation apparatus.
  22. 22. A ventilation apparatus according to any of Claims 17 to 21, wherein said assembly securement means includes support means for securing said ventilation apparatus within a housing.
  23. 23. A ventilation apparatus comprising a first louvre blade which extends in a first direction and a second louvre blade which extends in a second direction, wherein ends of said first and second blades are fixed relative to one another using a first securement means which makes face to face contact with a first surface of a base of said first louvre blade, which first surface faces inwardly of the apparatus and wherein a second surface of said base faces outwardly and is suitably an outermost air deflecting surface of the apparatus.
  24. 24. A ventilation apparatus according to Claim 23, wherein said first securement means makes face to face contact with a first surface of a base of the second louvre blade.
  25. 25. A housing for a ventilation apparatus including one or a plurality of support means for releasably securing the apparatus within the housing, where said housing includes at least two elongate, substantially linear side walls which include elongate openings along at least one quarter of their length.
  26. 26. A housing according to Claim 25, wherein said elongate openings are channels which are arranged to slidably receive said support means.
  27. 27. An assembly comprising a ventilation apparatus according to any of Claims 1 to 24 and a housing according to Claims 25 and 26.
  28. 28. A method of manufacturing a ventilation apparatus comprising securing ends of first and second blades relative to one another by positioning a first securement means within respective channel means of said first and second blades, and providing a restrictor means for restricting movement of the first and second blades relative to said first securement means.
  29. 29. The use of a ventilation apparatus according to any of Claims 1 to 24 for controlling air flow in a confined space.
  30. 30. A method of controlling air flow in a confined space, using a ventilation apparatus or assembly as claimed in any of Claims 1 to 27.
  31. 31. A ventilation apparatus substantially as described herein with reference to Figures 3 to 20.
  32. 32. An assembly substantially as described herein with reference to Figures 3 to 20.
  33. 33. A method substantially as described herein with reference to Figures 3 to 20.
  34. 34. A use substantially as described herein with reference to Figures 3 to 20.
GB9801319A 1998-01-23 1998-01-23 Ventilation Apparatus Expired - Fee Related GB2333588B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9801319A GB2333588B (en) 1998-01-23 1998-01-23 Ventilation Apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9801319A GB2333588B (en) 1998-01-23 1998-01-23 Ventilation Apparatus

Publications (3)

Publication Number Publication Date
GB9801319D0 GB9801319D0 (en) 1998-03-18
GB2333588A true GB2333588A (en) 1999-07-28
GB2333588B GB2333588B (en) 2002-03-13

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GB9801319A Expired - Fee Related GB2333588B (en) 1998-01-23 1998-01-23 Ventilation Apparatus

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006108228A1 (en) * 2005-04-15 2006-10-19 Minova International Limited Airflow regulator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1042462A (en) * 1963-06-06 1966-09-14 Ian Melville Clark Air diffuser
US3908528A (en) * 1973-07-30 1975-09-30 Mannie Bertin Diffusers for conditioned air
GB1535257A (en) * 1977-04-26 1978-12-13 Rcm Equipment Ltd Air diffusers
GB2216647A (en) * 1988-03-04 1989-10-11 Lonbet Limited A louvre panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1042462A (en) * 1963-06-06 1966-09-14 Ian Melville Clark Air diffuser
US3908528A (en) * 1973-07-30 1975-09-30 Mannie Bertin Diffusers for conditioned air
GB1535257A (en) * 1977-04-26 1978-12-13 Rcm Equipment Ltd Air diffusers
GB2216647A (en) * 1988-03-04 1989-10-11 Lonbet Limited A louvre panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006108228A1 (en) * 2005-04-15 2006-10-19 Minova International Limited Airflow regulator

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Publication number Publication date
GB9801319D0 (en) 1998-03-18
GB2333588B (en) 2002-03-13

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