WO2007019591A1 - Secure blind or closure - Google Patents

Secure blind or closure Download PDF

Info

Publication number
WO2007019591A1
WO2007019591A1 PCT/ZA2006/000095 ZA2006000095W WO2007019591A1 WO 2007019591 A1 WO2007019591 A1 WO 2007019591A1 ZA 2006000095 W ZA2006000095 W ZA 2006000095W WO 2007019591 A1 WO2007019591 A1 WO 2007019591A1
Authority
WO
WIPO (PCT)
Prior art keywords
strips
another
closure
opening
strip
Prior art date
Application number
PCT/ZA2006/000095
Other languages
French (fr)
Inventor
Wolf Dieter Dorr
Wilfred Janscheck
Original Assignee
Iron Curtain Security Blinds Manufacturing (Pty) Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iron Curtain Security Blinds Manufacturing (Pty) Ltd. filed Critical Iron Curtain Security Blinds Manufacturing (Pty) Ltd.
Publication of WO2007019591A1 publication Critical patent/WO2007019591A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/08—Louvre doors, windows or grilles
    • E06B7/084—Louvre doors, windows or grilles with rotatable lamellae
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/302—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable without ladder-tape, e.g. with lazy-tongs, with screw spindle
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/325—Immobilising devices preventing raising
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/327—Guides for raisable lamellar blinds with horizontal lamellae

Definitions

  • This invention relates to closures for doors, windows and the like openings and is particularly, though not exclusively, concerned with a retractable closure that can also function as a security grid, adjustable blind, lockable security barrier and weather barrier.
  • the inventors have recognised that certain benefits can be obtained by providing a retractable blind that can also function as a secure closure for an opening.
  • One aspect of the invention provides a retractable closure for securing an opening comprising: a plurality of stiff elongate strips arranged in a row, the strips being substantially parallel to one another; -- locating means at both ends of each strip for moving the strips laterally between open and closed positions in the opening and for positively locating the strips laterally relatively to one another at least when the strips substantially span the opening; and means for rotating the strips about their longitudinal axes between open and closed positions.
  • the means for locking the strips to one another when they are in the closed position comprises returned lip formations along each edge of each strip, the lip formations being arranged such that the lip of one strip can engage the lip of an adjacent strip and prevent the strips from being rotated or moved apart;
  • the locating means is adjustable to move the strips laterally to interlock with one another;
  • the locating means includes at least one scissors arrangement comprising a row of a plurality of pairs of crossing members that are pivotally connected at their ends to adjacent pairs of crossing members, with the crossing points of the pairs of members being coincident with the longitudinal axes of the strips and being rotatably engaged with the strips; each scissors arrangement is slidably guided within a channel member; and the locating means prevents the strips from being moved towards or away from one another at least when the lips are inter-engaged with one another.
  • Another aspect of the invention provides a method of operating a secure retractable closure for an opening, the secure closure comprising a plurality of elongate strips arranged in a row, means for positively locating the strips relatively to one another at least when the strips span the opening, means for rotating the strips about their longitudinal axes between open and closed positions, and returned lip formations along each edge of each strip for locking the strips to one another when they are in the closed position, including the steps of: ⁇ adjusting the locating means to cause the strips substantially to span the opening; rotating the strips to a closed position so that the lip formations of adjacent strips are opposed to one another; and further adjusting the locating means to move the strips laterally away from one another and cause the lips to interlock with one another.
  • the method may include the further step of locking the locating means to prevent the strips from being moved towards one another.
  • the invention also provides an elongate strip or blind for a secure closure of the invention comprising a central rib, two wings flanking the central rib, and a returned lip along the free edge of each wing.
  • Preferred features of the elongate strip or blind, alone or in combination with one another are: — the central rib is substantially tubular; each wing is shallowly curved; each returned lip is substantially U-shaped; the lips of each strip extend in opposite directions from one another; and — the strip is of a hard or hardened metal, such as extruded aluminium or rolled steel alloy, that is resistant to cutting and bending.
  • Figure 1 shows a schematic plan view of a plurality of interlockable strips located relatively to one another by a scissors arrangement for a secure blind of the invention
  • Figure 2 shows a plan view of the interlockable strips of the blind of
  • Figure 3 shows a plan view of the scissors arrangement of Figure 1 ;
  • Figure 4 shows the scissors arrangement of Figure 2 in a partially confined position;
  • Figure 5 shows the scissors arrangement of Figure 2 in a fully confined position to provide maximum opening for an opening being spanned
  • Figure 6 shows a plan view of a preferred form of strip or blind of the invention, two spaced strips being illustrated;
  • Figure 7 shows the strips of Figure 6 rotated to a closed position;
  • Figure 8 shows the strips of Figure 6 separated further such that they interlock with one another;
  • Figure 9 shows a vertical section through an example of secure closure of the invention installed in an opening, the closure including blinds supported between upper and lower tracks;
  • Figure 10 shows a detail of the closure of Figure 9 illustrating a component for supporting a blind or strip
  • Figure 1 1 shows another example of upper and lower tracks for a secure closure of the invention
  • Figure 12 shows a perspective view of a track shown in Figure 9.
  • Figures 1 to 5 illustrate a secure closure 10 of the invention comprising a plurality of vertically extending blinds or strips 12, each supported on a central pivot 14, and an extensible scissors or trellis arrangement 16 comprising crossing elongate arms 18 in the form of flat steel strips that are pivotally connected to one another at their ends 20. The intersections of the arms 18 are pivotally connected to the central pivots 14.
  • Figure 1 shows the components together and Figures 2 and 3 separately.
  • Figures 4 and 5 respectively, show the scissors in partially and fully compressed forms as would occur in use, the strips being omitted for clarity of illustration.
  • FIGS. 6 to 8 illustrate a preferred shape of strip 12 and how such strips function and interlock in practice, the scissors being omitted again for clarity of illustration.
  • Each strip 12 comprises a central rib in the form of a slotted tube 22 straddled by two curved wings 24, each of which has a returned or U-shaped lip portion 26.
  • the strips have been rotated to permit maximum light to pass through the closure 10.
  • Curved arrows show rotating the strips to a closed position.
  • Figure 7 shows the strips 12 rotated to a closed position, such as to exclude light or wind.
  • the tips of the lips 26 touch the wings of the adjacent strips.
  • Unlocking is achieved in the reverse sequence, ie. moving the strips towards each other slightly, then rotating them. If maximum opening size is required, then the scissors is actuated to pull the strips towards one another and optionally towards a desired side of the opening.
  • the relative spacing of the strips is controlled by the scissors, such that the spacings between adjacent strips is substantially equal and each strip is solidly held in position relative to the other strips.
  • Figures 9 and 10 show a section through a secure closure 10 mounted in an opening 30.
  • the strips are mounted between an upper rail or track 32 and a lower rail or track 34.
  • the tracks 32 and 34 are similar.
  • Each track comprises a central head portion 36, a flat scissors guide portion 38, and a supporting portion 40.
  • Each strip or blind 12 has longitudinally extending supporting shafts 12.1 at each end.
  • the head portion 36 rotatably guides a threaded rod 42 that is engaged with a captive nut 44, the nut being held captive by opposed wings 44.1 slidable in slots in the head.
  • the nut engages a free end of the scissors, the other end of the scissors being fixed to a side wall, not shown. Rotating the rod 42 causes the scissors to expand and contract.
  • the scissors guide portion 38 accommodates and guides the scissor arms 18 which engage the supporting shafts 12.1 of the blinds. As can be seen the arms are pivotally connected by rivets 20.
  • the supporting portion 40 is formed as two opposed channel sections, each of which has a stepped ledge 42.
  • the supporting shafts of the blinds pass between the opposed channel sections.
  • Each shaft is pivotally mounted in a supporting body 44 that has opposed wheels 46 which roll in the stepped ledges 42.
  • the mounting body holds the blinds vertically, but permits them to rotate.
  • a threaded control rod 48 passes through bores in the supporting bodies.
  • the threads of the control rod engage splines or gears fixed to each supporting shaft to rotate the blinds between open and closed positions.
  • a scissors arrangement and supporting body is provided at the top and bottom of each blind so that the blinds are solidly held in position at o all times.
  • Figures 1 1 and 12 show variants of upper 32.1 and lower 34.1 rails for holding the blinds.
  • an upper rail 50 formed with a head portion 52, a scissors guide portion 54 and a supporting portion 56.
  • a lower rail 58 that has a head portion 60 for accommodating the free end of the lower supporting shaft of a blind and a scissors guide portion 62 for a lower scissors.
  • the head portion 52 is square and the captive nut, not shown, for opening and closing the scissors has a corresponding square shape.
  • the secure closure finds application in domestic and commercial premises for use on doors, windows and the like simultaneously to provide an adjustable blind the elements of which can be rotated for allowing or blocking light when the closure spans an opening and the whole closure B pulled open or closed when required.
  • the blind acts as burglar bars, provides an open barrier when the blinds are drawn but rotated to an open position and a more secure barrier when the blinds are rotated closed and interlocked with each other.
  • the secure blind may also be used to protect against the weather, such as hurricanes and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Blinds (AREA)

Abstract

A retractable closure (10) for securing an opening, such as a door or window against unauthorised entry or harsh weather, comprises a plurality of stiff elongate strips (12) arranged in a row, the strips being substantially parallel to one another; locating means (16, 42, 44) at both ends of each strip for moving the strips laterally between open and closed positions in the opening and for positively locating the strips ( 12) laterally relatively to one another at least when the strips substantially span the opening; means (48, 12.1 ) for rotating the strips about their longitudinal axes between open and closed positions; and means (26) for locking adjacent strips to one another when in the closed position.

Description

SECURE BLIND OR CLOSURE
TECHNICAL FIELD:
This invention relates to closures for doors, windows and the like openings and is particularly, though not exclusively, concerned with a retractable closure that can also function as a security grid, adjustable blind, lockable security barrier and weather barrier.
BACKGROUND ART:
So called "burglar bars" are available in fixed/solid forms either inside or outside windows and in retractable trellis forms for doors and windows. Each has their advantages and disadvantages having regard to effectiveness, reliability, appearance, cleaning and cost. Retractable blinds, arranged either vertically or horizontally are also available in many forms, but these are used to cover openings for privacy, appearance, light control and so on and are not intended for security or weather protection.
The inventors have recognised that certain benefits can be obtained by providing a retractable blind that can also function as a secure closure for an opening.
DISCLOSURE OF THE INVENTION:
One aspect of the invention provides a retractable closure for securing an opening comprising: a plurality of stiff elongate strips arranged in a row, the strips being substantially parallel to one another; -- locating means at both ends of each strip for moving the strips laterally between open and closed positions in the opening and for positively locating the strips laterally relatively to one another at least when the strips substantially span the opening; and means for rotating the strips about their longitudinal axes between open and closed positions.
Preferably means is provided for locking adjacent strips to one another when they are in the closed position. Further preferred optional features of the closure, alone or in combination with one another, are: the means for locking the strips to one another when they are in the closed position comprises returned lip formations along each edge of each strip, the lip formations being arranged such that the lip of one strip can engage the lip of an adjacent strip and prevent the strips from being rotated or moved apart; the locating means is adjustable to move the strips laterally to interlock with one another; -- the locating means includes at least one scissors arrangement comprising a row of a plurality of pairs of crossing members that are pivotally connected at their ends to adjacent pairs of crossing members, with the crossing points of the pairs of members being coincident with the longitudinal axes of the strips and being rotatably engaged with the strips; each scissors arrangement is slidably guided within a channel member; and the locating means prevents the strips from being moved towards or away from one another at least when the lips are inter-engaged with one another.
Another aspect of the invention provides a method of operating a secure retractable closure for an opening, the secure closure comprising a plurality of elongate strips arranged in a row, means for positively locating the strips relatively to one another at least when the strips span the opening, means for rotating the strips about their longitudinal axes between open and closed positions, and returned lip formations along each edge of each strip for locking the strips to one another when they are in the closed position, including the steps of: ~ adjusting the locating means to cause the strips substantially to span the opening; rotating the strips to a closed position so that the lip formations of adjacent strips are opposed to one another; and further adjusting the locating means to move the strips laterally away from one another and cause the lips to interlock with one another. The method may include the further step of locking the locating means to prevent the strips from being moved towards one another.
The invention also provides an elongate strip or blind for a secure closure of the invention comprising a central rib, two wings flanking the central rib, and a returned lip along the free edge of each wing.
Preferred features of the elongate strip or blind, alone or in combination with one another, are: — the central rib is substantially tubular; each wing is shallowly curved; each returned lip is substantially U-shaped; the lips of each strip extend in opposite directions from one another; and — the strip is of a hard or hardened metal, such as extruded aluminium or rolled steel alloy, that is resistant to cutting and bending.
Further features, variants and/or advantages of the invention will emerge from the following non-limiting description of examples of the invention made with reference to the accompanying schematic drawings and from the claims, which are to be regarded as an integral part of this description.
BRIEF DESCRIPTION OF THE DRAWINGS:
Figure 1 shows a schematic plan view of a plurality of interlockable strips located relatively to one another by a scissors arrangement for a secure blind of the invention; Figure 2 shows a plan view of the interlockable strips of the blind of
Figure 1 ;
Figure 3 shows a plan view of the scissors arrangement of Figure 1 ; Figure 4 shows the scissors arrangement of Figure 2 in a partially confined position;
Figure 5 shows the scissors arrangement of Figure 2 in a fully confined position to provide maximum opening for an opening being spanned; Figure 6 shows a plan view of a preferred form of strip or blind of the invention, two spaced strips being illustrated; Figure 7 shows the strips of Figure 6 rotated to a closed position; Figure 8 shows the strips of Figure 6 separated further such that they interlock with one another; Figure 9 shows a vertical section through an example of secure closure of the invention installed in an opening, the closure including blinds supported between upper and lower tracks;
Figure 10 shows a detail of the closure of Figure 9 illustrating a component for supporting a blind or strip; Figure 1 1 shows another example of upper and lower tracks for a secure closure of the invention; and Figure 12 shows a perspective view of a track shown in Figure 9.
DESCRIPTION OF ILLUSTRATED EMBODIMENTS:
In the drawings the same or similar parts have the same reference numbers, certain parts having sub-numbers to identify them as part of a component or as substantially equivalent parts in different embodiments.
Figures 1 to 5 illustrate a secure closure 10 of the invention comprising a plurality of vertically extending blinds or strips 12, each supported on a central pivot 14, and an extensible scissors or trellis arrangement 16 comprising crossing elongate arms 18 in the form of flat steel strips that are pivotally connected to one another at their ends 20. The intersections of the arms 18 are pivotally connected to the central pivots 14.
Figure 1 shows the components together and Figures 2 and 3 separately. Figures 4 and 5, respectively, show the scissors in partially and fully compressed forms as would occur in use, the strips being omitted for clarity of illustration.
Figures 6 to 8 illustrate a preferred shape of strip 12 and how such strips function and interlock in practice, the scissors being omitted again for clarity of illustration. Each strip 12 comprises a central rib in the form of a slotted tube 22 straddled by two curved wings 24, each of which has a returned or U-shaped lip portion 26.
In Figure 6 the strips are spaced apart from one another slightly less than the maximum extent permitted by the scissors and opening size.
The strips have been rotated to permit maximum light to pass through the closure 10. Curved arrows show rotating the strips to a closed position. Figure 7 shows the strips 12 rotated to a closed position, such as to exclude light or wind. The tips of the lips 26 touch the wings of the adjacent strips.
In Figure 8, the close position strips have been pulled apart further such that the lips 26 interlock with one another, preventing them being rotated to an open position.
Unlocking is achieved in the reverse sequence, ie. moving the strips towards each other slightly, then rotating them. If maximum opening size is required, then the scissors is actuated to pull the strips towards one another and optionally towards a desired side of the opening.
The relative spacing of the strips is controlled by the scissors, such that the spacings between adjacent strips is substantially equal and each strip is solidly held in position relative to the other strips.
Figures 9 and 10 show a section through a secure closure 10 mounted in an opening 30. The strips are mounted between an upper rail or track 32 and a lower rail or track 34. The tracks 32 and 34 are similar. Each track comprises a central head portion 36, a flat scissors guide portion 38, and a supporting portion 40. Each strip or blind 12 has longitudinally extending supporting shafts 12.1 at each end.
The head portion 36 rotatably guides a threaded rod 42 that is engaged with a captive nut 44, the nut being held captive by opposed wings 44.1 slidable in slots in the head. The nut engages a free end of the scissors, the other end of the scissors being fixed to a side wall, not shown. Rotating the rod 42 causes the scissors to expand and contract.
The scissors guide portion 38 accommodates and guides the scissor arms 18 which engage the supporting shafts 12.1 of the blinds. As can be seen the arms are pivotally connected by rivets 20.
The supporting portion 40 is formed as two opposed channel sections, each of which has a stepped ledge 42. The supporting shafts of the blinds pass between the opposed channel sections. Each shaft is pivotally mounted in a supporting body 44 that has opposed wheels 46 which roll in the stepped ledges 42. The mounting body holds the blinds vertically, but permits them to rotate.
A threaded control rod 48 passes through bores in the supporting bodies. The threads of the control rod engage splines or gears fixed to each supporting shaft to rotate the blinds between open and closed positions.
As shown a scissors arrangement and supporting body is provided at the top and bottom of each blind so that the blinds are solidly held in position at o all times.
Figures 1 1 and 12 show variants of upper 32.1 and lower 34.1 rails for holding the blinds. As shown there is an upper rail 50 formed with a head portion 52, a scissors guide portion 54 and a supporting portion 56. There 5 is also a lower rail 58 that has a head portion 60 for accommodating the free end of the lower supporting shaft of a blind and a scissors guide portion 62 for a lower scissors. The head portion 52 is square and the captive nut, not shown, for opening and closing the scissors has a corresponding square shape. 0
The secure closure finds application in domestic and commercial premises for use on doors, windows and the like simultaneously to provide an adjustable blind the elements of which can be rotated for allowing or blocking light when the closure spans an opening and the whole closure B pulled open or closed when required. At the same time the blind acts as burglar bars, provides an open barrier when the blinds are drawn but rotated to an open position and a more secure barrier when the blinds are rotated closed and interlocked with each other. The secure blind may also be used to protect against the weather, such as hurricanes and the like. 0
The invention is not limited to the precise details described above and shown in the drawings. Modifications may be made and other embodiments developed without departing from the scope of the invention as defined in the claims. 5
In the claims, the word "comprise" and variations thereof, such as "comprises" and "comprising", are used in an inclusive sense.

Claims

CLAIMS:
1 . A retractable closure for securing an opening comprising: a plurality of stiff elongate strips (12) arranged in a row, the strips being substantially parallel to one another; locating means (16, 42, 44) at both ends of each strip for moving the strips laterally between open and closed positions in the opening and for positively locating the strips (12) laterally relatively to one another at least when the strips substantially span the opening; and o — means (48, 12.1 ) for rotating the strips about their longitudinal axes between open and closed positions.
2. A closure as claimed in claim 1 , wherein locking means (26) is provided for locking adjacent strips to one another when they are in the s closed position.
3. A closure as claimed in claim 2, wherein the locking means comprises returned lip formations (26) along each edge of each strip (12), the lip formations being arranged such that the lip of one strip can engage 0 the lip of an adjacent strip and prevent the strips from being rotated or moved apart.
4. A closure as claimed in any one of claims 1 to 3, wherein the locating means (16, 42, 44) includes at least one scissors arrangement 5 comprising a row of a plurality of pairs of crossing members (18) that are pivotally connected at their ends (20) to adjacent pairs of crossing members, with the crossing points of the pairs of members being coincident with the longitudinal axes (16) of the strips and being rotatably engaged with the strips. 0
5. A closure as claimed in claim 4, wherein a scissors arrangement (16) is provided at both ends of the strips.
6. A closure as claimed in either of claim 4 or 5, wherein each B scissors arrangement (16) is slidably guided within a channel member (32,
34).
7. A method of operating a secure retractable closure for an opening, the secure closure (10) comprising a plurality of stiff elongate strips (12) arranged in a row, means (16, 42, 44) for positively locating the strips relatively to one another at least when the strips span the opening, means (48, 12.1 ) for rotating the strips about their longitudinal axes between open and closed positions, and returned lip formations (26) along each edge of each strip for locking the strips to one another when they are in the closed position, including the steps of: adjusting the locating means (16, 42, 44) to cause the strips substantially to span the opening; rotating (48, 12.1 ) the strips to a closed position so that the lip formations of adjacent strips are opposed to one another; and further adjusting the locating means (16, 42, 44) to move the strips laterally away from one another and cause the lips to interlock with one another.
8. An elongate strip or blind (12) for a secure retractable closure as claimed in claim 1 , comprising a central rib (22), two wings (24) flanking the central rib, and a returned lip (26) along the free edge of each wing.
PCT/ZA2006/000095 2005-08-08 2006-08-07 Secure blind or closure WO2007019591A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200506321 2005-08-08
ZA2005/06321 2005-08-08

Publications (1)

Publication Number Publication Date
WO2007019591A1 true WO2007019591A1 (en) 2007-02-15

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ID=37311853

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2006/000095 WO2007019591A1 (en) 2005-08-08 2006-08-07 Secure blind or closure

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB738024A (en) * 1952-12-23 1955-10-05 Georges Delanoe An improved louvrered blind having adjustable boards and utilizable as an outer protective curtain
EP0687793A1 (en) * 1994-05-15 1995-12-20 Hagay Yadidya Louvered movable window shutter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB738024A (en) * 1952-12-23 1955-10-05 Georges Delanoe An improved louvrered blind having adjustable boards and utilizable as an outer protective curtain
EP0687793A1 (en) * 1994-05-15 1995-12-20 Hagay Yadidya Louvered movable window shutter

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