Apparatus and components for multi-pane window assembly and window insert

Abstract

According to some implementations, a multi-pane window assembly and a multi-pane window insert are described. The multi-pane window insert includes a first pane formed of polycarbonate resin thermoplastic material and a second pane formed of polycarbonate resin thermoplastic material that is separated from the first pane by a spacer. A planar surface of each the first pane and the second pane are oriented substantially parallel to one another. A framing structure is provided for housing the plural panes and a gasket is provided for sealing the multi-pane window to a frame on installation. The multi-pane window insert is configured to be installed on an interior surface of a pre-existing window frame to improve the thermal, acoustic, and light transmittance properties of a multi-pane window assembly.

Claims

1. A multi-pane window insert comprising: a first pane formed of polycarbonate resin thermoplastic material; a second pane formed of polycarbonate resin thermoplastic material that is separated from the first pane by a spacer, wherein a planar surface of each the first pane and the second pane are oriented substantially parallel to one another; a spacer frame retaining and providing the structural support for the first pane and the second pane, wherein the spacer frame defines the spacer, and wherein the first pane is oriented on a first side of the spacer frame and the second pane is oriented on a second side of the spacer frame, wherein the spacer frame is formed of a polycarbonate resin thermoplastic, and wherein the spacer frame defines the perimeter of the window insert; and a gasket comprised of a flexible material and formed only on the exterior perimeter surfaces of the spacer frame without contacting the planar surfaces of the first pane or the second pane and without abutting the planar surfaces of the first pane and the second pane, the gasket having a flexible convex protrusion about the exterior perimeter surfaces of the spacer frame and being configured to provide a seal for the multi-pane window insert when installed in a preformed window frame, wherein the multi-pane window insert is configured to be installed on an interior surface of the preformed window frame.

2. The multi-pane window insert of claim 1, wherein the gasket comprises a first protrusion on an exterior facing side, a second protrusion on the interior facing side, and a third protrusion between the first and second protrusions, and wherein the first and second protrusions are elongated relative to the third protrusion.

3. The multi-pane window insert of claim 1, wherein the polycarbonate resin thermoplastic material is Lexan?.

4. The multi-pane window insert of claim 2, wherein the first, second and third protrusions are shaped as fins.

5. The multi-pane window insert of claim 2, wherein the first and second protrusions are shaped as fins and the third protrusion is shaped as a rounded nib.

6. The multi-pane window insert of claim 1, wherein said gasket is comprised of a synthetic rubber.

7. The multi-pane window insert of claim 1, wherein the gasket has a flat gasket surface that is adhered to the perimeter of the multi-pane window insert, and a convex gasket surface, opposing the flat gasket surface, having a substantially convex shape that is configured to abut the interior surface of the preformed window frame.

8. The multi-pane window insert of claim 1, wherein the spacer frame is a clear polycarbonate.

9. The multi-pane window insert of claim 1, wherein the spacer frame is a color tinted polycarbonate.

10. A multi-pane window assembly comprising: a multi-pane window having a plurality of glass panes and a preformed window frame; and a multi-pane window insert, the multi-pane window insert comprising a first pane formed of polycarbonate resin thermoplastic material, a second pane formed of polycarbonate resin thermoplastic material that is separated from the first pane by a spacer, wherein a planar surface of each the first pane and the second pane are oriented substantially parallel to one another, the window insert further comprising a spacer frame retaining and providing structural support for the first pane and the second pane and defining the spacer, wherein the first pane is oriented on a first side of the spacer frame and the second pane is oriented on a second side of the spacer frame, wherein the spacer frame is formed of a polycarbonate resin thermoplastic, and wherein the spacer frame defines the perimeter of the window insert, and a gasket comprised of a flexible material and formed only on the exterior perimeter surfaces of the spacer frame without contacting the planar surfaces of the first pane or the second pane and without abutting the planar surfaces of the first pane and the second pane, the gasket having a flexible convex protrusion about the exterior perimeter surfaces of the spacer frame and, wherein the multi-pane window insert is configured to be installed on an interior surface of the preformed window frame.

11. The multi-pane window assembly of claim 10, wherein the gasket comprises a first protrusion on an exterior facing side, a second protrusion on the interior facing side, and a third protrusion between the first and second protrusions, and wherein the first and second protrusions are elongated relative to the third protrusion.

12. The multi-pane window assembly of claim 10, wherein the polycarbonate resin thermoplastic material is Lexan?.

13. The multi-pane window assembly of claim 11, wherein the first, second and third protrusions are shaped as fins.

14. The multi-pane window assembly of claim 11, wherein the first and second protrusions are shaped as fins and the third protrusion is shaped as a rounded nib.

15. The multi-pane window assembly of claim 10, wherein said gasket is comprised of a synthetic rubber.

16. The multi-pane window assembly of claim 10, wherein the gasket has a flat surface that is adhered to the perimeter of the multi-pane window insert and a second surface having a substantially convex shape that is configured to abut the interior surface of the preformed window frame.

17. The multi-pane window assembly of claim 10, wherein the spacer frame is a clear polycarbonate.

18. The multi-pane window assembly of claim 10, wherein the spacer frame is a color tinted polycarbonate.

19. The multi-pane window insert of claim 1, wherein the spacer frame is cut at forty-five degree angles on each end to a specific size of the preformed window frame to form cut edges, and wherein the gasket is cut on forty-five degree angles on each end to substantially correspond to the cut edges of the spacer frame.

20. The multi-pane window assembly of claim 10, wherein the spacer frame is cut at forty-five degree angles on each end to a specific size of the preformed window frame to form cut edges, and wherein the gasket is cut on forty-five degree angles on each end to substantially correspond to the cut edges of the spacer frame.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 illustrates a perspective view of a multi-pane window according to some implementations.

(2) FIG. 2 illustrates a side view of the multi-pane window of FIG. 1.

(3) FIG. 3 illustrates a cross-section view of the multi-pane window of FIGS. 1 and 2.

(4) FIG. 4 illustrates a cross-section partial exploded view of the multi-pane window of FIG. 3.

(5) FIG. 5 illustrates a cross-section view of an example multi-pane window installation according to some implementations.

(6) FIG. 6 illustrates a cross-section view of an example multi-pane window installation according to some implementations.

(7) FIG. 7 illustrates a perspective view of a cross-section of the multi-pane window insert according to some implementations.

(8) FIG. 8A illustrates a side view of the multi-pane window insert of FIG. 7.

(9) FIG. 8B illustrates a cross-section of the multi-pane window insert of FIG. 8A along lines 8B according to some implementations.

(10) FIGS. 9A-9E illustrate example cross-section views of different gaskets for a multi-pane window installation according to various implementations.

DETAILED DESCRIPTION

(11) The following detailed description of certain implementations presents various descriptions of specific implementations of the invention. However, the invention can be embodied in a multitude of different ways as defined and covered by the claims. In this description, reference is made to the drawings where like reference numerals indicate identical or functionally similar elements.

(12) According to some implementations, a multi-pane window is described. The multi-pane window may be provided as an insert for installation into an existing window frame or may be provided as a new installation window or other viewing opening. In some implementations, the multi-pane window is provided as a clear, double-paned polycarbonate window insert with an air-tight gasket that fits into the interior of an existing window frame or opening.

(13) According to some implementations, the multi-pane window includes a first pane formed of polycarbonate resin thermoplastic material and a second pane formed of polycarbonate resin thermoplastic material that is separated from the first pane by a spacer. A planar surface of each the first pane and the second pane are oriented substantially parallel to one another. According to some implementations, the multi-pane window includes an interior spacer frame for retaining the first pane and the second pane and defining the spacer. According to some implementations, the interior spacer frame may be configured as a sash or skeleton. The first pane is oriented on an exterior facing side of the interior spacer frame, and the second pane is oriented on an interior facing side of the interior spacer frame.

(14) Aspects of a multi-plane window as disclosed herein will be described with reference to FIGS. 1-4 which illustrate non-limiting examples of a multi-pane window for purposes of reference in providing descriptions of the various components. It will be readily understood that the invention described herein may be implemented in other configurations of windows, door, skylights, or other structure which provide for transparent viewing of an external area from an interior enclosed or partially enclosed space.

(15) FIG. 1 illustrates a perspective view of a multi-pane window 100 according to some implementations. The multi-pane window 100 includes, a framing structure 102, such as a sash, and a viewing area 104. FIG. 2 illustrates a side view of the multi-pane window 100 of FIG. 1. As shown in FIG. 2, the multi-pane window includes a top area of the framing structure, such as sash area 102A and a side area of the framing structure, such as sash area 102B which are fit to one another at corner sections in order to provide the framing structure 102. The framing structure 102 also includes a spacer 106 for mounting the panes as will be described in greater detail with reference to FIG. 3. The multi-pane window includes multiple transparent panes 114 which provide for sound and temperature insulation upon installation.

(16) FIG. 3 illustrates a cross-section view of the multi-pane window 100 of FIGS. 1 and 2. As illustrated, the multi-pane window 100 includes the upper area of the framing structure 102A having spacer 106 which is formed as a protrusion from the body of the framing structure 102A. A first pane 114A is on an interior surface of the multi-pane window 100 and mounted in the framing structure 102 and abutted to the spacer 106. A second pane 114B is on an exterior surface of the multi-pane window 100 and mounted in the framing structure 102 and abutted to the opposite side of the spacer 106 from the first pane 114A. The first and second panes 114A may be secured to the framing structure 102 utilizing tape adhesive, adhesive beads, or by way of mechanical securing mechanisms. For example, the framing structure 102 may include a securing flange that can be pressed and adhered to the edges of the first and second panes 114A and 114B.

(17) According to some implementations, the first and second panes 114A and 114B are formed of a polycarbonate material. The polycarbonate has optical clarity and comes in various thicknesses depending on orientation and size of the multi-pane window 1100. For example, thicknesses may be 0.060 inches, 0.118 inches or 0.150 inches, or other thickness within the range of 0.025 inches to about 0.3 inches.

(18) In some implementations, the first and second panes 114A and 114B are formed of Lexan? Properties of the polycarbonate, such as Lexan? may correspond to those as outlined in the appended Annex A.

(19) FIG. 4 illustrates a cross-section partial exploded view of the multi-pane window 400 which corresponds to the multi-pane window 100 of FIG. 3. As shown, the first pane 414A and the second pane 414B are uniformly separated by a gap 414C along the substantially parallel interior surfaces of the first and second panes 414A and 414B. The gap 414C may be filled with a gas, such as dry air, argon, or nitrogen, which can be utilized to fill the space between the two panes to provide both a temperature and sound insulating property for the assembly.

(20) A window insert may be also be fabricated utilizing the structures described herein for implementation in residential or commercial windows. For example, strengthening of existing windows utilizing polycarbonate sheets or a window insert may be performed by incorporating the multi-pane window insert as described herein into existing window frame structures.

(21) According to some implementations, the multi-pane window inserts may be placed into existing window surrounds, in front of the existing window on the interior surface, creating a barrier from the outside elements and the building's interior. In some implementations, the multi-pane window insert includes a dual pane polycarbonate insert with an inner frame of like material held together with constructive grade adhesives or very high bond tape and wrapped with a flexible (e.g., EPDM rubber) gasket around its perimeter. Each insert is cut and manufactured for the specific window opening it is installed into to ensure proper sealing.

(22) In one example manufacturing process, the inner frame (e.g., a spacer frame) made of polycarbonate or acrylic is cut at forty-five degree angles on each end to a specific size for the window opening it is being built for. Two pieces for the width and two pieces for the height are cut to size. Each of the four pieces are covered with adhesive or very high bond tape applied to both of the cut sides.

(23) A gasket is then cut on forty-five degree angles on each end to substantially correspond to the edges of the window insert frame. A factory heat applied tape strip may be applied to the inside of the cut gasket. Two pieces are cut to cover the width of the preformed window frame and two pieces are cut to substantially match the height of the preformed window frame. The four corners may be adhered together in their proper width and height positions.

(24) The spacer frame is then adhered to a sheet of polycarbonate (e.g., Lexan) in order to match the dimensions of the preformed window frame. The sheet of polycarbonate is cut such that the edges of the polycarbonate substantially correspond to the spacer frame edges to form the first pane of the multi-pane window insert. A second sheet of polycarbonate is adhered to the opposing surface and cut to substantially correspond to the spacer frame edges to form the second pane of the multi-pane window insert.

(25) According to some implementations, a protective plastic is utilized on the surfaces of the polycarbonate sheets during the manufacturing process. The protective plastic may be removed from the interior facing surfaces of the polycarbonate sheets prior to adhering the sheets to the spacer frame. The protective plastic on the exterior surfaces may then be removed during installation of the multi-pane window insert in the preformed window frame.

(26) According to some implementations of the assembly process, taped or adhered areas may be pressure rolled to ensure tape adhesion on both sides of the completed insert. The excess polycarbonate may be removed using a router with a specific roller bearing head to remove the polycarbonate and create a substantially flush surface relative to the spacer frame. According to some implementations, edges of the assembled multi-pane window insert are deburred to create a smooth polycarbonate edge. The outer perimeter is then cleaned to create a proper surface for adhesion to the gasket. According to some implementations, the gasket may be installed onto the outer perimeter of the multi-pane window insert with factory applied heat tape flush with the front and back of the insert.

(27) Window types vary in many ways and dimensions. This is particularly true for pre-existing window installations that may have shifted, settled, or warped over time in older construction. For example, some pre-formed window frames may require an angle frame to be installed into the window surround, producing a landing for the insert to create a proper seal. Other installations may require some adaptation of the shape and size of the insert's sides and corners in order to create a more feasible size of insert depending on the size and location within the building the existing window is located.

(28) The multi-pane window inserts described herein may be formed in any shape or configuration (e.g., Arched, Round, Trapezoid, Hexagon, etc.) to match the pre-existing window frame. Due to the light weight and flexibility of the polycarbonate sheets, each of the corners of the multi-pane window insert may also be formed in a different shape or dimensions in order to match the dimensions of the pre-formed window frame.

(29) According to some implementations, the polycarbonate sheet is Lexan polycarbonate, having substantially the following attributes as shown below in Tables 1-4.

(30) TABLE-US-00001 TABLE 1 Physical Properties Property Test Method Units Value Physical Specific Gravity ASTM D792 1.20 Refractive Index @ 77? F. ASTM D542A 1.586 Light Transmission (Average at 0.118) ASTM D1003 % 86 Initial Haze HU <1 Rockwell Hardness (M scale) ASTM D785 70 Rockwell Hardness (R scale) ASTM D785 118 Taber @ 100 cycles ASTM D1044 % haze 10 (ANSI ZI26.1) Water Absorption, 24 hrs ASTM D570 % 0.15 Water Absorption, Equilibrium @ 73? F. % 0.35

(31) TABLE-US-00002 TABLE 2 Physical Properties Mechanical Tensile Strength, Yield ASTM D638 psi 9,500 Tensile Modulus ASTM D638 psi 345,000 Flexural Strength ASTM D790 psi 13,500 Flexural Modulus ASTM D790 psi 345,000 Compressive Strength ASTM D695 psi 12,500 Compressive Modulus ASTM D695 psi 345,000 Poisson's Ratio ASTM E132 0.37 Izod Impact Strength Notched ASTM D256A ft-lbs/in 12-16 @ 0.118 Unnotched @ 0.118 60 (no failure) Shear Strength @ Yield ASTM D732 psi 6,000 Shear Modulus ASTM D732 psi 114,000

(32) TABLE-US-00003 TABLE 2 Thermal Properties Thermal Coefficient of Thermal ASTM D696 in/in/? F. 3.75 ? 10.sup.?5 Expansion Coefficient of Thermal ASTM C177 Btu .Math. in/hr .Math. 1.35 Conductivity ft2 .Math. ? F Specific Heat @ 40? C. ASTM C351 BTU/lb .Math. ? F. 0.30 Heat Deflection Temperature ASTM D648 ? F. 270 @ 264 psi @ 66 psi 280 Brittle Temperature (on resin) ASTM D746 ? F. ?211

(33) TABLE-US-00004 TABLE 4 Electrical Properties Electrical Dielectric Constant @ 60 Hz ASTM D150 3.17 Volume Resistivity ASTM D257 Ohm-cm 8.2 ? 1016 Dissipation Factor (@60 Hz) also ASTM D150 0.0009 known as Power Factor

(34) According to some implementations, the spacer frame may be a clear polycarbonate (e.g., Lexan) of the same material as the panes of the multi-pane window insert. In other implementations, the spacer frame may be tinted to any desired color to provide for an aesthetic or decorative appeal.

(35) FIG. 5 illustrates a cross-section view of an example multi-pane window assembly 500 according to some implementations. As illustrated in FIG. 5, a multi-pane window assembly 500 may be assembled utilizing as a retrofit multi-pane window insert 510 into an existing window structure by inserting the multi-pane window in the existing framing abutted against or secured to the window frame jambs 516A, 516B. As shown in FIG. 5, the pre-existing window structure is a sashed assembly having surfaces 513A and 513B as the external facing surfaces of the window. A window insert 510 includes gaskets 520A, 520B for providing an airtight seal between the window insert 510 and the window frame jamb 516A, 516B of the pre-existing window frame.

(36) Utilizing the window insert 510 multiple insulating air spaces 515 can be provided which drastically reduce heat loss, while increasing comfort levels by keeping conditioned air separated from existing windows. For example, a single pane may be retrofitted to become a double or triple pane window assembly 500 using the window insert 510.

(37) FIG. 6 illustrates a cross-section view of an example multi-pane window assembly 600 according to some implementations. As illustrated in FIG. 6, a multi-pane window assembly 600 may be assembled utilizing as a retrofit multi-pane window insert 610 into an existing window structure by inserting the multi-pane window in the existing framing abutted against or secured to the window frame jambs 616A, 616B. As shown in FIG. 6, the pre-existing window structure is a single window assembly having surface 613A as the external facing surface of the window. A window insert 610 includes gaskets 620A, 620B for providing an airtight seal between the window insert 610 and the window frame jamb 616A, 616B of the pre-existing window frame. While not illustrated, in some embodiments a pre-existing window pane may have associated mullions that are also susceptible to air transfer leakage. The multi-pane window insert described herein may be applied to remedy these issues when inserted into a pre-existing window frame.

(38) Utilizing the multi-pane constructions described herein, a multi-pane window assembly can be formed which insulates the opening by stopping the permeating temperatures that glass cannot. During simulation tests, the window insert slows the infiltration of solar heat gain and blocks 99% of the ultraviolet (UV) radiation. When applied to a single pane window, it can improve the U-Factor by as much as 120% and the Solar Heat Gain Coefficient (SHGC) by up to approximately 10%. The multi-pane window described herein may stop 99% of the air infiltration caused by, drafty windows. It also has sound remediation qualities and can reduce noise by, as much as 7 to 10 decibels.

(39) The multi-pane window insert costs 70-85% less than a replacement window with the same insulation value that is made of glass. Because of its unique gasket system, installation is simple, quick and without the inconvenience of traditional window installations. In addition, the multi-pane window insert can be fabricated on-site, and can be adapted easily to match the unique structure of a retrofit installation for any existing pre-formed window frame. Since the multi-pane window insert is installed at the interior surface of the pre-existing window frame, the external fa?ade of the installation space is undisturbed. This is particularly advantageous for landmark commercial buildings requiring permits and particular architectural considerations for any Changes to the external fa?ade.

(40) Further, the multi-pane window weighs up to 90% less than a correspondingly sized conventional glass window while allowing the heating and air conditioning systems to work less to maintain the desired temperatures within a residence or other building. The disclosed multi-pane window allows more efficient climate control by eliminating the hot and cold air from entering or escaping. The reduced weight also allows for simpler installation and reduced costs for transporting the windows to the installation site, without requiring heavy equipment for mounting the windows in place. The multi-pane window insert assembly described herein also drastically improves the impact strength of the window installation, exhibiting up to 50x the impact strength of tempered glass, up to 100x the impact strength of laminated glass, and up to 15x the impact of an acrylic construction window.

(41) Simulations performed utilizing the multi-pane window insert relative to other traditional window installations illustrate the improvement in both the rate of heat transfer (e.g., U-Factor) as well as solar radiation transmission (e.g., solar heat gain coefficient SHGC) in comparing a glass only window installation to a glass window with the multi-pane window insert (denoted as Glass With IEG INS) as shown in Tables 1 and 2 below:

(42) TABLE-US-00005 TABLE 1 U-Factor Improvement U-Factor (btu/h-ft2-F) U-Factor % Glass Type Glass Only Glass With IEG INS Improvement Single Pane Clear 1.04 0.47 121% Double Pane Clear 0.48 0.23 109% Double Pane Clear 0.25 0.13 56% (Low-E) Single Pane Tinted 1.04 0.30 244% Double Pane Tinted 0.45 0.22 105% Double Pane Tinted 0.27 0.16 65% (Low-E)

(43) TABLE-US-00006 TABLE 2 SHGC Improvement Solar Heat Gain Co-efficiency (SHGC) SHGC-% Glass Type Glass Only Glass With IEG INS Improvement Single Pane Clear 0.87 0.78 11% Double Pane Clear 0.78 0.65 17% Double Pane Clear 0.50 0.43 14% (Low-E) Single Pane Tinted 0.70 0.54 23% Double Pane Tinted 0.66 0.51 23% Double Pane Tinted 0.55 0.43 22% (Low-E)

(44) Additional simulations were performed utilizing specific configurations of multi-pane window installations and installation of a multi-pane window insert as described herein in order to form a multi-pane window assembly. These simulations measure and show significant improvements in Air Leakage (AL), Energy Performance Index for Cooling (EPc), Energy Performance Index for Heating (Eph), U-Factor, solar heat gain coefficient (SHGC), air leakage (AL), and visible transmittance (VT).

(45) TABLE-US-00007 SERIES/MODEL Thermal Optic Insert PRODUCT TYPE Fixed, 4-Sided ATTACHMENT TYPE Window Panel DESCRIPTION Double Glazed Interior Window Insert BASE WINDOW BW-B

(46) TABLE-US-00008 BASE WINDOW GLAZING DESCRIPTION OUTER PANE MIDDLE PANE INNER PANE GAP SIZE OVERALL All ? N/A ? ? ? OUTER PANE MIDDLE PANE INNER PANE All Clear N/A Clear SPACER TYPE PRIMARY SEAL SECONDARY SEAL CODE All Aluminum Spacer Butyl Butyl A1-D

(47) TABLE-US-00009 ATTACHMENT DESCRIPTION TYPE CODE POSITION MOUNT GAP Window Panel WP Interior Inside 1.500 OUTER PANE MIDDLE PANE INNER PANE GAP SIZE OVERALL 1 ? N/A ? 0.516 ? OUTER PANE MIDDLE PANE INNER PANE 1 Clear N/A Clear SPACER TYPE PRIMARY SEAL SECONDARY SEAL CODE All Lexan Foam Tape N/A Other

Example 1 Pre-Formed Window and Insert Properties

(48) TABLE-US-00010 TOTAL PRODUCT CALCULATIONS (Thermal Optic Insert) AERC Baseline Total Product Performance Option Window U-Value AL Number Description Type (BTU/h .Math. ft.sup.2 .Math. F) SHGC VT (cfm/ft.sup.2) EPc EPh 1 Double BW-B 0.23 0.49 0.50 0.01 29 105 Glazed Interior Window Insert

Example 1 Multi-Pane Window Insert Assembly Performance

(49) TABLE-US-00011 SERIES/MODEL Thermal Optic Insert PRODUCT TYPE Fixed, 4-Sided ATTACHMENT TYPE Window Panel DESCRIPTION Double Glazed Interior Window Insert BASE WINDOW BW-D

(50) TABLE-US-00012 BASE WINDOW GLAZING DESCRIPTION OUTER PANE MIDDLE PANE INNER PANE GAP SIZE OVERALL All ? N/A N/A N/A ? OUTER PANE MIDDLE PANE INNER PANE All Clear N/A N/A SPACER TYPE PRIMARY SEAL SECONDARY SEAL CODE All No Spacer N/A N/A N

(51) TABLE-US-00013 ATTACHMENT DESCRIPTION TYPE CODE POSITION MOUNT GAP Window Panel WP Interior Inside 1.500 OUTER PANE MIDDLE PANE INNER PANE GAP SIZE OVERALL All ? N/A ? 0.516 ? OUTER PANE MIDDLE PANE INNER PANE All Clear N/A Clear SPACER TYPE PRIMARY SEAL SECONDARY SEAL CODE All Lexan Foam Tape N/A Other

Example 2 Pre-Formed Window and Insert Properties

(52) TABLE-US-00014 TOTAL PRODUCT CALCULATIONS (Thermal Optic Insert) AERC Baseline Total Product Performance Option Window U-Value AL Number Description Type (BTU/h .Math. ft.sup.2 .Math. F) SHGC VT (cfm/ft.sup.2) EPc EPh 1 Double BW-D 0.41 0.53 0.56 0.01 26 76 Glazed Interior Window Insert

Example 2 Multi-Pane Window Insert Assembly Performance

(53) TABLE-US-00015 SERIES/MODEL Thermal Optic Insert PRODUCT TYPE Fixed, 4-Sided ATTACHMENT TYPE Window Panel DESCRIPTION Double Glazed Interior Window Insert BASE WINDOW BW-E

(54) TABLE-US-00016 BASE WINDOW GLAZING DESCRIPTION OUTER PANE MIDDLE PANE INNER PANE GAP SIZE OVERALL All ? N/A ? ? ? OUTER PANE MIDDLE PANE INNER PANE All Clear N/A Clear SPACER TYPE PRIMARY SEAL SECONDARY SEAL CODE All Aluminum Spacer Butyl Butyl A1-D

(55) TABLE-US-00017 ATTACHMENT DESCRIPTION TYPE CODE POSITION MOUNT GAP Window Panel WP Interior Inside 1.500 OUTER PANE MIDDLE PANE INNER PANE GAP SIZE OVERALL All ? N/A ? 0.516 ? OUTER PANE MIDDLE PANE INNER PANE All Clear N/A Clear SPACER TYPE PRIMARY SEAL SECONDARY SEAL CODE All Lexan Foam Tape N/A Other

Example 3 Pre-Formed Window and Insert Properties

(56) TABLE-US-00018 TOTAL PRODUCT CALCULATIONS (Thermal Optic Insert) AERC Baseline Total Product Performance Option Window U-Value AL Number Description Type (BTU/h .Math. ft.sup.2 .Math. F) SHGC VT (cfm/ft.sup.2) EPc EPh 1 Double BW-E 0.34 0.51 0.52 0.01 30 96 Glazed Interior Window Insert

Example 3 Multi-Pane Window Insert Assembly Performance

(57) As illustrated by these examples, the multi-pane window assembly described herein exhibits significant improvements across all measurable attributes relative to a single or dual-pane glass window assembly.

(58) The applications of the multi-pane window described herein is not limited to single windows alone. It can be applied to large window facings such as store fronts, insulating the entire window wall or display wall. The use of a retrofit window is an affordable, convenient, highly efficient way to insulate windows. Due to the light-weight construction, existing framing structures can be utilized for installation without additional architectural supports for the building which are required for traditional glass window installations. Installation is simple, quick and does not require demolition or construction. The multi-pane window can improve the comfort level of any office or building, reduce its energy consumption and save money.

(59) As described with reference to FIGS. 5-8, according to some implementations, the multi-pane window includes a gasket comprised of a flexible material. The gasket being configured to provide a seal for the multi-pane window when installed in a window frame. According to some implementations, the gasket comprises a first protrusion on the exterior facing side, a second protrusion on the interior facing side, and a third protrusion between the first and second protrusions. According to some implementations, the first and second protrusions are elongated relative to the third protrusion.

(60) According to some implementations, the second protrusion is elongated relative to the first protrusion. According to some implementations, the first, second and third protrusions are shaped as fins. According to some implementations, the first and second protrusions are shaped as fins and the third protrusion is shaped as a rounded nib.

(61) According to some implementations, the gasket may be made of a synthetic rubber, such as ethylene propylene diene terpolymer (EPDM) rubber, allowing the gasket to be resistant to extreme heat and cold, steam, ozone and other weather conditions. According to some implementations, the gasket may have up to 85% memory retention. Because the gasket is open and breathable, it reduces condensation on the window surfaces. The color of the gasket can be matched to almost any color through an extrusion process.

(62) The gaskets described herein may also be formed of other materials, such as rubber, BUNA-N, nitrile, Neoprene? 1, SBR, silicone, thermoplastic rubber (TPE), and flexible PVC, or other suitable materials.

(63) FIG. 7 illustrates a perspective view of a cross-section of the multi-pane window insert 700 according to some implementations. As shown in FIG. 7, the multi-pane window insert 700 includes a spacer frame (e.g., skeleton) 702 which defines the overall structure of the multi-pane window insert 700 and is configured to substantially conform to the measurements of the corresponding pre-formed window frame. A first polycarbonate pane 714A and a second polycarbonate pane 714B are adhered to opposing surfaces of the spacer frame 702 utilizing bonding agent 708A and 708B. In some implementations, the bonding agent 708A and 708B corresponds to high bond double sided adhesive tape. The first pane 714A and the second pane 714B are pressure rolled to ensure a tight bond with the spacer frame 702. The spacer frame 702 is provided only on the exterior perimeter of the multi-pane window 700 such that an air gap 704 is provided between the first pane 714A and the second pane 714B. Gaskets 720A-720C are adhered to the external surface of the multi-pane window insert 700 by way of bonding agent 718. In some implementations, bonding agent 718 corresponds to a high strength construction glue and the gaskets 720A-720C are pressure rolled to provide a strong bond. The gaskets 720A-720C are bonded together at matching cut angle corners 720. While not shown in the cross-section view, the gasket is provided on the four perimeter surfaces of the multi-pane window 700 to enable an air-tight seal when installed in the pre-existing window frame to form the multi-pane window assembly.

(64) FIG. 8A illustrates a side view of the multi-pane window insert of FIG. 7. As shown in FIG. 8A, the spacer frame has a width 838 measured across the thickness of the multi-pane window insert which may be in the range of 0.5 to 1.5 inches. FIG. 8B illustrates a cross-section of the multi-pane window insert of FIG. 8A along lines 8B according to some implementations. As shown in FIG. 8B, the gasket 820 has a width 826 in the range of 0.5 inches to 1.5 inches and a height 830 in the range of 0.25 inches to 0.75 inches. According to some implementations, the width 826 of the gasket 820 is approximately 1-5% greater than the width 836 of the multi-pane window insert as measured from the edges of the first pane 814A and second pane 814B.

(65) The first pane 814A and the second pane 814B may have a thickness 832 in the range of 0.1 to 0.4 inches, while the adhesive bonding the panes 814A, 814B to the spacer frame 802 may have a thickness of less than 0.03 inches. For ease of reference, the adhesive is illustrated across the entire height of the multi-pane window insert, but one of ordinary skill in the art will recognize that the adhesive may be applied only at the portions corresponding to the external surfaces of the spacer frame 802 to bond the panes 814A, 814B.

(66) The dimensions described in FIGS. 8A-8B are for illustrative purposes only and are non-limiting examples of an implementation of the multi-pane window. One of ordinary skill in the art will recognize that the dimensions may be adapted according to the structure and requirements of a pre-formed window frame.

(67) FIGS. 9A-9E illustrate example cross-section views of different gaskets for a multi-pane window installation according to various implementations. The gasket configurations illustrated in FIGS. 9A-9E may be utilized and modified accordingly for integration with any suitable sash or prefabrication window assembly.

(68) FIG. 9A illustrates an example of a cross-section gasket that is utilized in the example implementation illustrated with reference to FIGS. 5-6. As shown in FIG. 9A, the gasket 920 includes a single fin section 922 that is configured to allow for sealing of the multi-pane window upon installation into a window frame. FIG. 9B illustrates an example gasket 930 which includes plural protrusions for providing the sealing mechanism of the gasket 930. As shown, a first protrusion 932 and a second protrusion 934 are provided on opposite ends of the gasket 930. A central protrusion 936 is provided such that the first protrusion 932 and the second protrusion 934 are elongated relative to the central protrusion 936.

(69) The extended protrusions of the gasket may be formed as fins or have rounded corners or have any variation therebetween. For example, with reference to FIG. 9C, gasket 940 includes a first fin 942 and a second fin 944 which may be provided on opposite ends with a rounded central protrusion 946 therebetween. The extensions on either end of the gasket 940 may be elongated relative to the central protrusion and/or relative to each other. For example, with reference to FIG. 9D, gasket 950 includes an extension 954 which may be elongated relative to both the central protrusion 956 and the extension 952. In some implementations, the longest protrusion is configured to be on the internal facing surface of a window insert, such that the shorter extension is provided on the external facing side of the window insert to provide for an easier installation while maintaining a proper seal. In each of FIGS. 9A-9D, the flat surface of the gaskets is configured to be adhered to the external perimeter of the multi-pane window inserts as described above. The gaskets are cut at angled or rounded corners in order to correspond to the perimeter of the multi-pane window insert. The flexible protrusions allow for an air-tight seal with the existing pre-formed window frame. The gasket configurations described above may also be provided as a prefabricated elastomeric gasket.

(70) According to some implementations, for example as shown in FIGS. 7-8B, the gasket may be formed without elongated protrusions. For example, as shown in FIG. 9E, a gasket 960 may be formed with a flat surface and a convex surface defining a gap 962. The convex surface abuts the pre-formed window frame and flexes to flatten the gap 962 to adapt and provide the air-tight seal to the window frame.

(71) In addition to the insulative properties described above, the multi-pane window disclosed exhibits an impact resistance benefit, for example against weather events or other impact. Additives and other sealant techniques may be utilized to enable a retrofitting installation of the multi-pane window.

(72) Due to the high impact resistant nature of the multi-pane window, a quick release mechanism may be provided to enable removal of the multi-pane window insert described herein in emergency situations. For example, emergency responders may have a need to vent an area during a the and would typically resort to breaking a glass window to the extent possible. In order to enable a corresponding safety/emergency release feature, a quick release mechanism may be provided during installation of the multi-pane window.

(73) Since the gasket of the multi-pane window insert is of a flexible material, a hook or bar made of a rigid material can be utilized to effectively pry the multi-pane window insert away from the pre-formed frame in the event of an emergency or removal for replacement or cleaning. This feature is advantageous over other screw-in or permanently fastened type window inserts which cannot otherwise be readily removed. Due to the light-weight nature of the multi-pane window insert described herein, such permanent fastening mechanisms are not necessary to retain the multi-pane window insert in the pre-formed window frame. Rather, the multi-pane window insert is retained in the pre-formed window frame by the suction and friction force of the flexible gasket that pushed into place during the installation process. For example, due to the retrofit nature of the multi-pane window insert, the multi-pane window insert may be removed by way of a J-hook or other detachment bar that is capable of penetrating the area between the insert and the pre-formed window frame where the flexible gasket creates the seal.

(74) In some implementations, the release mechanism may correspond to one or more pull straps that are fastened to the edges of the multi-pane window insert while maintaining the air-tight seal created by the gasket. These straps can be utilized to effectively uncouple the multi-pane window insert from the pre-formed frame.

(75) In other implementations, the multi-pane window insert may be removably fastened to the pre-formed window frame utilizing snaps, velcro, or other removable fastening mechanisms. These fastening mechanisms may provide additional retention force to that provided by the coupling of the flexible gasket to the pre-formed window frame, while maintaining the removable capability of the multi-pane window insert.

(76) Although this invention has been described in terms of certain implementations, other implementations that are apparent to those of ordinary skill in the art, including implementations that do not provide all the features and advantages set forth herein, are also within the scope of this invention. Moreover, the various implementations described above can be combined to provide further implementations. In addition, certain features shown in the context of one implementation can be incorporated into other implementations as well. Accordingly, the scope of the present invention is defined only by reference to the appended claims.