[0002] The invention generally relates to an assembly for use in a building structure and in particular to a window system which may be installed in a window opening.
DESCRIPTION OF THE RELATED ART
[0003] The increase in rate of thefts has created a need for theft-proof windows. Further, windows may provide protection against insects and inclement weather. Installation of conventional window systems is complex and may consume enormous labor and time for installation. Further, the fastener used to mount the grills or bars may be visible outside thereby deteriorating the aesthetic appearance. Conventional window systems have no effect on burglary protection. Windows commonly used are not made of high quality materials and are not durable and sound-proof.
[0004] US4724634A patent discloses security windows in which bars are fixed into the concrete surrounding the window opening. The disadvantage of these security windows is that it may include significant labor costs for installation and also may require more masonry work. There is a need of a system which minimizes handling and installation costs. The present invention discloses a system which overcomes some of the drawbacks of the existing systems.

[0005] In various embodiments, provided herein is a window system for use in a window opening of a building structure. The window system includes a wall edge cover configured to line the window opening on all sides. The wall edge cover includes two sets of opposite sides. In some embodiments, the system includes a plurality of grill bars extending between and fastened to a first set of opposite sides of the wall edge cover.
[0006] In some embodiments, the window system includes a mullion member extending between and fastened to a second set of opposite sides of the wall edge cover. In one embodiment, the mullion member is orientated perpendicular to the plurality of grill bars. The grill bars are passing through the mullion member.
[0007] In various embodiments, the window system includes a pair of casement window sashes hinged to the wall edge cover. The casement window sashes are fitted with an insect screen. In some embodiments, the wall edge cover include a plurality a mounting holes on the first set of opposite sides to support the plurality of grill bars on the wall edge cover.
[0008] In various embodiments, the window system includes a pair of grill bar holders for securing each grill bar of the plurality of grill bars in the wall edge cover. In some embodiments, the grill bar holders are polygonal in shape and disposed in polygonal slots to arrest rotation of the grill bar.
[0009] In various embodiments, each of the pair of casement window sashes includes a first peripheral groove. The first peripheral groove is adapted to receive a first gasket to hold the insect screen. In some embodiments, each pair of casement window sashes includes a second peripheral groove. The second peripheral groove is adapted to receive a second gasket to soften contact between the casement window sashes and the wall edge cover.

[0010] In some embodiments, the wall edge cover is of unplasticized polyvinyl chloride. In one embodiment, the casement window sashes is of unplasticized polyvinyl chloride.
[0011] In various embodiments, provided herein is a window system for use in a window opening of a building structure. The window system includes a wall edge cover configured to line the window opening on all sides. Further, the window system includes a pair of casement window sashes hinged to the wall edge cover, the casement window sashes are fitted with the insect screen.
[0012] In some embodiments, each of the pair of casement window sashes includes a first peripheral groove. The first groove is adapted to receive a first gasket to hold the insect screen. In one embodiment, each pair of casement window sashes includes a second peripheral groove. The second groove is adapted to receive a second gasket to soften contact between the casement window sashes and the wall edge cover.
[0013] In some embodiments, the wall edge cover is of unplasticized polyvinyl chloride. The casement window sashes is of unplasticized polyvinyl chloride.

[0014] The invention has other advantages and features which will be more readily apparent from the following detailed description of the invention and the appended claims, when taken in conjunction with the accompanying drawings, in which:
[0015] FIG. 1A illustrates a system for use in a window opening with grill bars.
[0016] FIG. 1B illustrates an embodiment of the system with grill bars passing through a mullion.
[0017] FIG. 1C illustrates an exploded view of the grill configuration showing the grill bars and grill bar holders.
[0018] FIG. 1D illustrates an exploded view of the mullion, wall edge cover and fasteners for fastening the mullion to the wall edge cover.
[0019] FIG. 1E illustrates an embodiment of the invention with grill bars and casement window sash with insect screen.
[0020] FIG. 1F shows a schematic diagram of the window system with grooves in the casement window sashes and the insect screen.
[0021] FIG. 2A illustrates a system for use in a window opening with casement window sash with insect screen.
[0022] FIG. 2B shows a schematic diagram of the window system with grooves in the casement window sashes and the insect screen.
Referring to the drawings, like numbers indicate like parts throughout the views.

[0023] While the invention has been disclosed with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt to a particular situation or material to the teachings of the invention without departing from its scope.
[0024] Throughout the specification and claims, the following terms take the meanings explicitly associated herein unless the context clearly dictates otherwise. The meaning of "a", "an", and "the" include plural references. The meaning of "in" includes "in" and "on." Referring to the drawings, like numbers indicate like parts throughout the views. Additionally, a reference to the singular includes a reference to the plural unless otherwise stated or inconsistent with the disclosure herein.
[0025] The invention in its various embodiments discloses a system which may be installed in a window opening. The system includes a wall edge cover and a grill assembly. The grill assembly is mounted on to the wall edge cover to prevent burglars from entering through the window opening. The system further includes a casement window sash to prevent ingress of insects. The system improves the aesthetic appearance of the window by concealing the mounting members. Also, the system is simple and easy to install.
[0026] In various embodiments provided herein is a system 100 as shown in FIG. 1A for use in a window opening of a building structure. The window opening is the opening in the building structure for fitting components of the window, where the building structure may be made of concrete, wood or other building materials. The system 100 includes a wall edge cover 110 fitted on to the window opening. The wall edge cover 110 is a cover disposed around window opening, a cross-sectional portion of which is illustrated in FIG. 1C. The wall edge cover 110 comprises a primary portion 110A and a secondary

portion 110B that covers the window sill and a wall portion perpendicular to the window sill respectively. The primary portion 110A and the secondary portion 110B are perpendicular to the each other. To elaborate, the wall edge cover 110 provides a cover to the window edges and prevents any damage to the window edges and provides aesthetic appeal to the window edges as well.
[0027] In various embodiments, the wall edge cover 110 is configured to line the window opening on all sides. The wall edge cover 110 may include two sets of opposite sides. In one embodiment, the wall edge cover 110 is fixed to the window opening using fasteners at an indoor side of the building. In another embodiment, the wall edge cover 110 is fixed to the window opening using fasteners at an outdoor side of the building. In various embodiments, the wall edge cover 110 is made of unplasticized polyvinyl chloride (uPVC). In some embodiments, the uPVC wall edge cover 110 may be fixed directly to the window opening using conventional builder’s adhesive. The advantage of using uPVC wall edge cover 110 is that it requires low maintenance and it is moisture resistant. Further, uPVC wall edge cover 110 is sound-proof, durable and long lasting.
[0028] In one embodiment, the window opening may be square shaped and the wall edge cover 110 may also be shaped in square form to line the window opening. In another embodiment, the window opening may be rectangular shaped and the wall edge cover 110 may also be shaped in rectangular form to line the window opening. The wall edge cover 110 may also be called as internal sill.
[0029] In various embodiments, the system 100 further includes a plurality of grill bars 130 extending between and fastened to a first set of opposite sides of the wall edge cover 110. The plurality of grill bars 110 are fastened to the wall edge cover 110. In one embodiment, the grill bars 130 may be fastened to the wall edge cover 110 fixed to an inside of the building in the window opening. In another embodiment, the grill bars 130 may be fastened to the wall edge cover 110 fixed to an outside of the building in the

window opening. In some embodiments, and as illustrated in FIG. 1B, the wall edge cover110 include a plurality a mounting holes 133 on the first set of opposite sides to support the plurality of grill bars 130 on the wall edge cover 110. Further, the system 100 includes a pair of grill bar holders 135 for securing each grill bar 130 of the plurality of grill bars in the wall edge cover 110. In some embodiments, grill bar holders 135 are polygonal in shape and disposed in polygonal slots to arrest rotation of the grill bar 130. This is because a polygonal body that can fit inside a polygonal slot, cannot rotate inside the polygonal slot. In this context, the term polygonal can refer to quadrilateral, pentagonal, hexagonal, septagonal, octagonal or other similar shapes. This enables arresting the rotary motion of the grill bars 130. In some embodiments, the grill bar holders 135 are made of high performance plastic. In one embodiment, the grill bar holders 135 are made of polypropylene copolymer. The grill bar holders 135 include a slot configured to hold the grill bars 130. In some embodiments, the grill bars 130 are made of metals such as mild steel or stainless steel.
[0030] In one embodiment, each of the left and right side members of the rectangular or square wall edge cover 110 includes a plurality of vertically spaced mounting holes 133 at different elevations. Grill bar holders 135 are inserted at each mounting hole 133 to secure the grill bars 130. In another embodiment, top and bottom members of the rectangular or square wall edge cover 110 includes horizontally spaced mounting holes 133 in which mounting members 135 are inserted to secure the grill bars 130 vertically. The wall edge cover 110 is configured to rigidly secure the grill bars 130.In various embodiments, the wall edge cover 110 is configured to provide structural support to the grill bars 130.
[0031] In various embodiments, the system 100 further includes a mullion member 140 as shown in FIG. 1B. Further, the plurality of bars 130 pass through the mullion 140. In some embodiments, the mullion member 140 is positioned between and fastened to a second set of opposite sides of the wall edge cover 110 and a plurality of grill bars 130

are extending between and fastened to the first set of opposite sides. Further, the mullion member 140 is oriented perpendicular to the grill bars 130. In one embodiment, the system 100 includes a rectangular or square wall edge cover 110 and the first set of opposite sides includes the left and right side members of the wall edge cover 110 and the second set of opposite sides includes top and bottom members of the wall edge cover 110. In another embodiment, the first set of opposite sides include top and bottom members of the wall edge cover 110 and the second set of opposite sides include left and right side members.
[0032] In one embodiment, the mullion member 140 is oriented vertically. Further, the horizontal grill bars 130 pass through the vertical mullion 140 as shown in FIG. 1C. In some embodiments, hole cover caps (not shown) may be used to cover the holes in the mullion 140 and the grills 130.The vertical mullion member 140 is configured to prevent bending of the grill bars 130 when the width of the wall edge cover 110 exceeds a first threshold limit. In one embodiment, the first threshold limit is 800mm. In another embodiment, vertically spaced grill bars 130 pass through the horizontal mullion 140. The horizontal orientation of the mullion member 140 is also called as transom. The horizontal mullion member or transom 140 is configured to prevent bending of the grill bars 130 when the height of the wall edge cover 110 exceeds a second threshold limit. In one embodiment, the second threshold limit is 1535 mm. In some embodiments, the mullion 140 is secured to the wall edge cover110 using screws as shown in FIG. 1D and is configured to interlock therein to the wall edge cover 110. In one embodiment, the mullion 140 is made of aluminium.
[0033] In various embodiments, the system 100 further includes a casement window sash 120 hinged to the wall edge cover 110 as shown in FIG. 1E. An insect screen 122 is placed on the casement window sash 120. In some embodiments, the system 100 includes a pair of casement window sashes 120 hinged to the wall edge cover 110 with insect screen 122 in each of the sashes 120. The wall edge cover 110 may be fixed to an

outdoor side of the building with casement window sash 120 hinged to the wall edge cover 110 with insect screen 122. In one embodiment, the insect screen 122 is made of nylon fiber or stainless steel.
[0034] In various embodiments, and as illustrated in FIG. 1F, each of the pair of casement window sashes 120 includes a first peripheral groove 114. The first peripheral groove 114 is adapted to receive a first gasket 117 to hold the insect screen 122. The gasket 117 is configured to hold the insect screen 122 in the first groove 114 by virtue of the gasket 117 being held firmly in the first groove 114. Further, each pair of casement window sashes 120 includes a second peripheral groove 112. The second peripheral groove 112 is adapted to receive a second gasket 116 to soften contact between the casement window sashes 120 and the wall edge cover 110. The second gasket 116 is also configured to fill in the space between the wall edge cover 110 and the casement window sash 120 to prevent any leakage during rain. In other words, the second gasket 116 may act as a seal between the casement window sash 120 and the wall edge cover 110. In some embodiments, the gaskets 116, 117 are made of rubber. In one embodiment, the gaskets 116, 117 are made of Ethylene Propylene Diene Monomer (EPDM). The gaskets 116, 117 are also configured to eliminate noise. In one embodiment, the casement window sashes 120 are of unplasticized polyvinyl chloride.
[0035] In various embodiments provided herein, is a system 200 as shown in FIG. 2A for use in a window opening of a building structure. The system 200 includes a wall edge cover 210 configured to line the window opening on all sides. The wall edge cover includes two sets of opposite sides. In some embodiments, the system 200 includes a pair of casement window sashes 220 hinged to the wall edge cover 210. In one embodiment, the system 200 includes a casement window sash 220 hinged to the wall edge cover 210. The casement window sashes 220 are fitted with the insect screen 222.In one embodiment, the insect screen 222 is made of nylon fiber or stainless steel. In one embodiment, the system 100 and 200 can be used with a window opening which is 26

feet by 12 feet. This is just an example and the window system 100 and 200 is not limited to this dimension only. The window system 100 and 200 can be applied to any dimension of the window opening.
[0036] In various embodiments, and as illustrated in FIG.2B, each of the pair of casement window sashes 220 includes a first peripheral groove 214. The first peripheral groove 214 is adapted to receive a first gasket 217 to hold the insect screen 222. The gasket 217 is configured to hold the insect screen 222 in the first groove 214 by virtue of the gasket 217 being held firmly in the first groove 214. Further, each pair of casement window sashes 220 includes a second peripheral groove 212. The second peripheral groove 212 is adapted to receive a second gasket 216 to soften contact between the casement window sashes 220 and the wall edge cover 210. The second gasket 216 is also configured to fill in the space between the wall edge cover 220 and the casement window sash 120 to prevent any leakage during rain. The gaskets 216, 217 are also configured to eliminate noise. In one embodiment, the wall edge cover 210 and casement window sashes 220 are of unplasticized polyvinyl chloride. The wall edge cover 110 and 210 can accommodate walls of a flat profile or a circular profile by having corresponding spacing inside the wall edge cover 110 and 210.
[0037] The disclosed system may be used to prevent unauthorized entry through the window opening. Further, the system may be used to prevent the entry of insects or like through the window opening. The system improves the aesthetic appearance of the window by concealing the window opening. Also, the system is simple and durable. The system may only require simple screwing for fixing the grills onto the wall edge cover. The system may be installed quickly in a window opening. The system may be prefabricated with grill bars according to the dimensions of the window opening and assembled easily on the window opening of the building structure thereby reducing the installation time. The system provides noiseless operation. Further, the system is configured to minimize the risk of damage of the wall edge cover using the gasket. The

disclosed system is economical. The system consumes less space than the conventional systems as the grill bars are mounted in the wall edge cover. The system may be also used in doors.
[0038] The combination of the wall edge cover 110 and the grill bars 130 reduces assembly effort of the window system 100 and 200. This is because the wall edge cover 110 provides a base for the grill bars 130, which are not directly mounted onto the window opening. Hence, the provision of the wall edge cover 110 provides the advantage of easy mounting of the grill bars 130 and the presence of the grill bars 130 provides structural rigidity to the wall edge cover 100. Hence, both of them derive the above respective advantages from each other. The provision of the casement window sash 120 is advantageous to the wall edge cover 110 and the grill bars 130 by providing a covering to the wall edge cover 100 and the grill bars 130. The casement window sash 120 also enjoys the advantage of being easily mounted or fixed to the wall edge cover 110 and not on the window opening directly. Hence, each of the components, such as the wall edge cover 110, the grill bars 130 and the casement window sash 120 provide advantageous effects to the other to result in an improved window system 100 and 200.
[0039] Although the detailed description contains many specifics, these should not be construed as limiting the scope of the invention but merely as illustrating different examples and aspects of the invention. It should be appreciated that the scope of the invention includes other embodiments not discussed herein. Various other modifications, changes and variations which will be apparent to those skilled in the art may be made in the arrangement, operation and details of the system and method of the present invention disclosed herein without departing from the spirit and scope of the invention as described here.

WE CLAIM:
1. A window system (100) for use in a window opening of a building structure, the
window system (100) comprising:
a wall edge cover (110) configured to line the window opening on all sides, the wall edge cover (110) comprising two sets of opposite sides;
a plurality of grill bars(130) extending between and fastened to a first set of
opposite sides of the wall edge cover (110).
2. The window system (100) as claimed in Claim 1, further comprising a mullion member (140) extending between and fastened to a second set of opposite sides of the wall edge cover (110), wherein the mullion member (140) is orientated perpendicular to the plurality of grill bars (130), the grill bars (130) passing through the mullion member (140).
3. The window system (100) as claimed in Claim 1 and 2, further comprising a pair of casement window sashes (120) hinged to the wall edge cover (110), the casement window sashes (120) fitted with an insect screen (122).
4. The window system (100) as claimed in Claim 1, wherein the wall edge cover (110) comprise a plurality of mounting holes (133) on the first set of opposite sides to support the plurality of grill bars (130) on the wall edge cover (110).
5. The window system (100) as claimed in Claim 4, further comprising a pair of grill bar holders (135) for securing each grill bar (130) of the plurality of grill bars in the wall edge cover (110), wherein grill bar holders (135) are polygonal in shape and disposed in polygonal slots to arrest rotation of the grill bar (130).

6. The window system (100) as claimed in Claim 3, wherein each of the pair of casement window sashes (120) comprises a first peripheral groove (114), the groove (114) adapted to receive a first gasket (117) to hold the insect screen (122).
7. The window system (100) as claimed in Claim 3, wherein each pair of casement window sashes (120) comprises a second peripheral groove (112), the groove (112) adapted to receive a second gasket (116) to soften contact between the casement window sashes (120) and the wall edge cover (110).
8. The window system (100) as claimed in Claim 1, wherein the wall edge cover (110) is of unplasticized polyvinyl chloride.
9. The window system (100) as claimed in Claim 2, wherein the casement window sashes (120) is of unplasticized polyvinyl chloride.
10. A window system (200) for use in a window opening of a building structure, the
window system (200) comprising:
a wall edge cover (210) configured to line the window opening on all sides, the wall edge cover (210) comprising two sets of opposite sides; and
a pair of casement window sashes (220) hinged to the wall edge cover (210), the casement window sashes (220) fitted with the insect screen.
11. The window system (200) as claimed in Claim 10, wherein each of the pair of
casement window sashes (220) comprises a first peripheral groove (214), the groove
(214) adapted to receive a first gasket (217) to hold the insect screen (222).

12. The window system (200) as claimed in Claim 10, wherein each pair of casement window sashes (220) comprises a second peripheral groove (212), the groove (212) adapted to receive a second gasket (216) to soften contact between the casement window sashes (220) and the wall edge cover (210).
13. The window system (200) as claimed in Claim 10, wherein the wall edge cover (210) is of unplasticized polyvinyl chloride.
14. The window system (200) as claimed in Claim 10, wherein the casement window sashes (220) is of unplasticized polyvinyl chloride.