POLYCARBONATE BASED RAPID DEPLOYMENT COVER SYSTEM

Abstract

The present invention provides a rapid deployment cover system comprising a polycarbonate laminate or a glass-clad polycarbonate laminate in combination with a versatile and cushioned mounting system to yield a highly durable cover which provides protection from forced-entry, blast, ballistics and/or extreme storms in a wide range of climates.

Claims

1. A rapid deployment cover system for a wall having an opening, the system comprising: a mounting track attached to the wall; a polycarbonate laminate having a first side adjacent to the mounting track, a second side and a plurality of holes through the first and second sides; a pressure plate adjacent to the second side of the polycarbonate laminate; a first plurality of bolts, wherein each such bolt is fixedly attached to the pressure plate, and passes through a corresponding hole in the polycarbonate laminate; and a plurality of elastomeric sleeves, wherein each such sleeve is situated substantially around a bolt and within a hole of the polycarbonate laminate.

2. The rapid deployment cover system of claim 1, wherein the first plurality of bolts is fixedly attached to both the pressure plate and the mounting track, and the mounting track is attached to the wall by a second plurality of bolts.

3. The rapid deployment cover system of claim 2, wherein the mounting track is attached to the wall by 4 to 8 bolts of the second plurality of bolts.

4. The rapid deployment cover system of claim 1, wherein the first plurality of bolts is fixedly attached to the wall.

5. The rapid deployment cover system of claim 4, wherein the mounting track is attached to the wall by 4 to 8 bolts.

6. The rapid deployment cover system of claim 1, further comprising one or more shims disposed between the mounting plate and the wall.

7. The rapid deployment cover system of claim 6, wherein the shims are constructed of an elastomeric material.

8. The rapid deployment cover system of claim 6, wherein the shims create a space of at least 0.25 inches between the wall and the mounting plate.

9. The rapid deployment cover system of claim 1, wherein the first plurality of bolts are spaced at least 3 inches apart from each another.

10. The rapid deployment cover system of claim 9, wherein the first plurality of bolts are spaced at least 6 inches apart from each another.

11. The rapid deployment cover system of claim 1, wherein the plurality of holes in the polycarbonate laminate are about 2 inches in diameter.

12. The rapid deployment cover system of claim 1, wherein at least one of the plurality of holes in the polycarbonate laminate has a diameter of about 3.7 times the thickness of an elastomeric sleeve.

13. The rapid deployment cover system of claim 1, wherein at least one of the elastomeric sleeves has a thickness of about 0.535 inches.

14. The rapid deployment cover system of claim 1, wherein at least one of the elastomeric sleeves has a Shore A hardness of about 35 to about 45.

15. The rapid deployment cover system of claim 1, wherein at least one of the elastomeric sleeves has a tensile strength of about 1450 psi.

16. The rapid deployment cover system of claim 1, wherein at least one of the elastomeric sleeves is constructed of ethylene propylene diene monomer (EPDM).

17. The rapid deployment cover system of claim 1, further comprising at least one bushing disposed between a bolt and an elastomeric sleeve.

18. The rapid deployment cover system of claim 1, wherein the polycarbonate laminate comprises at least one edge, and the plurality of holes in the polycarbonate laminate are located at least 0.25 inches away from the at least one edge of the polycarbonate laminate.

19. The rapid deployment cover system of claim 18, wherein the plurality of holes in the polycarbonate laminate are located at least 3 inches away from the at least one edge of the polycarbonate laminate.

20. The rapid deployment cover system of claim 1, further comprising a pressure plate cover.

21. A method for installing a cover to a wall having an opening, the method comprising: A) drilling and installing 4 to 8 anchor holes in the wall around the opening; B) fixing a mounting track to the 4 to 8 anchor holes in the wall; and C) hanging a polycarbonate laminate having a first side adjacent to the mounting track, a second side and a plurality of holes through the first and second sides, (i) through the use of a pressure plate adjacent to the second side of the polycarbonate laminate, and (ii) also through the use of a first plurality of bolts, wherein each such bolt is fixedly attached to the pressure plate at one end, and passes through an elastomeric sleeve and a hole of the polycarbonate laminate.

22. The method of claim 21, wherein the first plurality of bolts is fixedly attached to both the pressure plate and the mounting track, and the mounting track is attached to the wall by a second plurality of bolts.

23. The method of claim 19, wherein the first plurality of bolts is fixedly attached to the wall.

24. The method of claim 19, further comprising: D) installing one or more shims between the mounting plate and the wall.

25. The method of claim 24, wherein the shims create a space of at least 0.25 inches between the wall and the mounting plate.

26. The method of claim 21, wherein the first plurality of bolts are spaced at least 3 inches apart from each another.

27. The method of claim 26, wherein the first plurality of bolts are spaced at least 6 inches apart from each another.

28. The method of claim 21, wherein the plurality of holes in the polycarbonate laminate are about 2 inches in diameter.

29. The method of claim 21, wherein at least one of the plurality of holes in the polycarbonate laminate has a diameter of about 3.7 times the thickness of an elastomeric sleeve.

30. The method of claim 21, wherein each of the first plurality of bolts passes through a bushing.

31. The method of claim 21, wherein the polycarbonate laminate comprises at least one edge, and the plurality of holes in the polycarbonate laminate are located at least 0.25 inches away from the at least one edge of the polycarbonate laminate.

32. The method of claim 31, wherein the plurality of holes in the polycarbonate laminate are located at least 3 inches away from the at least one edge of the polycarbonate laminate.

33. The method of claim 21, further comprising: E) installing a pressure plate cover.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0046] The present invention will now be described for purposes of illustration and not limitation in conjunction with the figures, wherein:

[0047] FIG. 1A shows the glass-clad polycarbonate laminate rapid deployment cover system of the present invention;

[0048] FIG. 1B shows the polycarbonate laminate rapid deployment cover system of the present invention;

[0049] FIG. 2A shows a view of section B-B of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 1A;

[0050] FIG. 2B shows a view of section B-B of the polycarbonate rapid deployment cover system depicted in FIG. 1B;

[0051] FIG. 3A shows a view of section C-C of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 1A;

[0052] FIG. 3B shows a view of section C-C of the polycarbonate rapid deployment cover system depicted in FIG. 1B;

[0053] FIG. 4A shows the glass-clad polycarbonate laminate rapid deployment cover system of the present invention mounted on an existing opening;

[0054] FIG. 4B shows the polycarbonate laminate rapid deployment cover system of the present invention mounted on an existing opening;

[0055] FIG. 5A shows a view of section A-A of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 1A;

[0056] FIG. 5B shows a view of section A-A of the polycarbonate rapid deployment cover system depicted in FIG. 1B;

[0057] FIG. 6A shows the glass-clad polycarbonate laminate rapid deployment cover system of the present invention with tamper-proof nuts;

[0058] FIG. 6B shows the polycarbonate rapid deployment cover system of the present invention with tamper-proof nuts;

[0059] FIG. 7A shows a view of section D-D of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 6A;

[0060] FIG. 7B shows a view of section D-D of the polycarbonate rapid deployment cover system depicted in FIG. 6B;

[0061] FIG. 8A shows a view of section E-E of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 6A;

[0062] FIG. 8B shows a view of section E-E of the polycarbonate rapid deployment cover system depicted in FIG. 6B;

[0063] FIG. 9A shows a detail view of element F of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 7A;

[0064] FIG. 9B shows a detail view of element F of the polycarbonate rapid deployment cover system depicted in FIG. 7B;

[0065] FIG. 10A shows a detail view of element G of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 8A;

[0066] FIG. 10B shows a detail view of element G of the polycarbonate rapid deployment cover system depicted in FIG. 8B;

[0067] FIG. 11A shows a detail view of element H of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 8A;

[0068] FIG. 11B shows a detail view of element H of the polycarbonate rapid deployment cover system depicted in FIG. 8B;

[0069] FIG. 12A shows a detail view of element I of the glass-clad polycarbonate laminate rapid deployment cover system depicted in FIG. 7A;

[0070] FIG. 12B shows a detail view of element I of the polycarbonate rapid deployment cover system depicted in FIG. 7B;

[0071] FIG. 13 shows another embodiment of the rapid deployment cover system of the present invention;

[0072] FIG. 14 shows a view of section J-J of an alternative mounting scheme for the inventive rapid deployment cover system depicted in FIG. 13;

[0073] FIG. 15A shows a view of the threat side of the glass-clad polycarbonate laminate embodiment of the rapid deployment cover system of the present invention;

[0074] FIG. 15B shows a view of the threat side of the polycarbonate laminate embodiment of the rapid deployment cover system of the present invention;

[0075] FIG. 16A shows a top-down view of the threat and protection sides of the glass-clad polycarbonate laminate depicted in FIG. 15A;

[0076] FIG. 16B shows a top-down view of the threat and protection sides of the polycarbonate laminate depicted in FIG. 15B;

[0077] FIG. 17A shows a perspective view illustrating the threat side of the glass-clad polycarbonate laminate used in the rapid deployment cover system of the present invention;

[0078] FIG. 17B shows a perspective view illustrating the threat side of the polycarbonate laminate used in the rapid deployment cover system of the present invention;

[0079] FIG. 18A shows a detail view of the layer structure of glass-clad polycarbonate laminate taken at A in FIG. 16A;

[0080] FIG. 18B shows a detail view of the layer structure of polycarbonate laminate taken at A in FIG. 16B;

[0081] FIG. 19 shows the wall side of the track used to hold the laminate in the inventive rapid deployment cover system;

[0082] FIG. 20 shows the panel side of the track used to hold the laminate in the inventive rapid deployment cover system of the present invention;

[0083] FIG. 21 shows a view of section A-A of the track used to hold the laminate in the inventive rapid deployment cover system depicted in FIG. 20;

[0084] FIG. 22 shows a view of section B-B of the track used to hold the laminate in the inventive rapid deployment cover system depicted in FIG. 20;

[0085] FIG. 23 shows a view of section C-C of the track used to hold the laminate in the inventive rapid deployment cover system depicted in FIG. 20;

[0086] FIG. 24 shows a detail view of element E of the track used to hold the laminate in the inventive rapid deployment cover system depicted in FIG. 20;

[0087] FIG. 25 shows a detail view of element G of the track used to hold the laminate in the inventive rapid deployment cover system depicted in FIG. 20;

[0088] FIG. 26 shows a detail view of element F of the track used to hold the laminate in the inventive rapid deployment cover system depicted in FIG. 20;

[0089] FIG. 27 shows the panel side of the track used to hold the laminate in the inventive rapid deployment cover system;

[0090] FIG. 28 shows the wall side of the track used to hold the laminate in the inventive rapid deployment cover system;

[0091] FIG. 29 shows a perspective view of the track used to hold the laminate in the rapid deployment cover system of the present invention;

[0092] FIG. 30 shows a front view of the elastomeric sleeve of the rapid deployment cover system of the present invention;

[0093] FIG. 31 shows a cross-section view of the elastomeric sleeve of the rapid deployment cover system of the present invention;

[0094] FIG. 32 shows a perspective view of the elastomeric sleeve of the rapid deployment cover system of the present invention;

[0095] FIG. 33 shows a front view of the bushing of the rapid deployment cover system of the present invention;

[0096] FIG. 34 shows a cross-section view of the bushing of the rapid deployment cover system of the present invention;

[0097] FIG. 35 shows a perspective view of the bushing of the rapid deployment cover system of the present invention;

[0098] FIG. 36A shows a front view of the pressure plate of the glass-clad polycarbonate laminate embodiment of the inventive rapid deployment cover system;

[0099] FIG. 36B shows a front view of the pressure plate of the polycarbonate laminate embodiment of the inventive rapid deployment cover system;

[0100] FIG. 37A shows an edge view of the pressure plate of the glass-clad polycarbonate laminate embodiment of the inventive rapid deployment cover system;

[0101] FIG. 37B shows an edge view of the pressure plate of the polycarbonate laminate embodiment of the inventive rapid deployment cover system;

[0102] FIG. 38A shows a view of section A-A of the pressure plate depicted in FIG. 36A;

[0103] FIG. 38B shows a view of section A-A of the pressure plate depicted in FIG. 36B;

[0104] FIG. 39A shows a view of section B-B of the pressure plate depicted in FIG. 36A;

[0105] FIG. 39B shows a view of section B-B of the pressure plate depicted in FIG. 36B;

[0106] FIG. 40A shows a detail view of element C of the pressure plate depicted in FIG. 36A;

[0107] FIG. 40B shows a detail view of element C of the pressure plate depicted in FIG. 36B;

[0108] FIG. 41A shows a detail view of element D of the pressure plate depicted in FIG. 36A;

[0109] FIG. 41B shows a detail view of element D of the pressure plate depicted in FIG. 36B;

[0110] FIG. 42A shows a detail view of element E of the pressure plate depicted in FIG. 36A;

[0111] FIG. 42B shows a detail view of element E of the pressure plate depicted in FIG. 36B;

[0112] FIG. 43A shows a detail view of element F of the pressure plate depicted in FIG. 36A;

[0113] FIG. 43B shows a detail view of element F of the pressure plate depicted in FIG. 36B;

[0114] FIG. 44A shows a perspective view of the pressure plate of the glass-clad polycarbonate laminate embodiment of the inventive rapid deployment cover system;

[0115] FIG. 44B shows a perspective view of the pressure plate of the polycarbonate laminate embodiment of the inventive rapid deployment cover system;

[0116] FIG. 45A shows a front view of the pressure plate of the glass-clad polycarbonate laminate embodiment of the inventive rapid deployment cover system;

[0117] FIG. 45B shows a front view of the pressure plate of the polycarbonate laminate embodiment of the inventive rapid deployment cover system;

[0118] FIG. 46A shows a detail view of element G of the pressure plate depicted in FIG. 45A;

[0119] FIG. 46B shows a detail view of element G of the pressure plate depicted in FIG. 45B;

[0120] FIG. 47 shows a front view of the frame cover of the inventive rapid deployment cover system;

[0121] FIG. 48 shows an edge view of the frame cover of the inventive rapid deployment cover system;

[0122] FIG. 49 shows a view of section A-A of the frame cover of the inventive rapid deployment cover system depicted in FIG. 47;

[0123] FIG. 50 shows a perspective view of the frame cover of the inventive rapid deployment cover system depicted in FIG. 47;

[0124] FIG. 51 shows a front view of the elastomeric washer of the inventive rapid deployment cover system;

[0125] FIG. 52 shows a cross-section view of the elastomeric washer of the inventive rapid deployment cover system; and

[0126] FIG. 53 shows a perspective view of the elastomeric washer of the inventive rapid deployment cover system.

DETAILED DESCRIPTION OF THE INVENTION

[0127] The present invention will now be described for purposes of illustration and not limitation. Except in the operating examples, or where otherwise indicated, all numbers expressing quantities, percentages, and so forth in the specification are to be understood as being modified in all instances by the term about.

[0128] The present invention provides a rapid deployment cover system comprising a polycarbonate laminate or a glass-clad polycarbonate laminate in combination with a versatile and cushioned mounting system to provide a highly durable cover over building openings (e.g., architectural openings such as windows and doors, and non-architectural openings such as those openings created by bullets, shells and explosives) which provides protection from forced-entry, ballistics and/or extreme storms in a wide range of climates. The polycarbonate laminate or glass-clad polycarbonate laminate may be opaque, translucent or transparent.

[0129] Such laminates may be designed to be held in place by a framing system attached to the building, and surrounding the individual building openings. The framing system must compensate for the following: the coefficient of thermal expansion of polymeric materials, and associated expansion and contraction; the weight of the covers, some in excess of 750 lbs. (340 kg); different building architectures and materials of construction; chemical compatibility of all components; and potential for fastener misalignments and lack of building wall flatness and squareness. Moreover, the installed panels and framing must be forced entry and ballistics certified. The present invention also provides an adjustable framing system and a cushioned mounting system that meets all the above criteria.

[0130] The polycarbonate panels useful in the inventive laminate are preferably transparent, but there are situations where the panels may be translucent, or even opaque.

[0131] All panels, whether transparent, translucent or opaque, may be also fabricated to include decorative elements such as artwork, graphics and natural grasses. Further, the transparent panels may be fabricated to include mirrored surfaces or graphics which permit one-way viewing from inside a darkened building to the brighter exterior.

[0132] Suitable polycarbonate resins for preparing the panels useful in the laminates of the present invention are homopolycarbonates and copolycarbonates, both linear or branched resins and mixtures thereof. Such polycarbonates have a weight average molecular weight (as determined by gel permeation chromatography, or size-exclusion chromatography) of preferably 10,000 to 200,000, more preferably 20,000 to 80,000 and a melt flow rate, per ASTM D-1238 at 300 C., of preferably 1 to 65 g/10 min., more preferably 2 to 35 g/10 min. The polycarbonates may be prepared, for example, by the known diphasic interface process from a carbonic acid derivative such as phosgene and dihydroxy compounds by polycondensation (See, German Offenlegungsschriften 2,063,050; 2,063,052; 1,570,703; 2,211,956; 2,211,957 and 2,248,817; French Patent 1,561,518; and the monograph by H. Schnell, Chemistry and Physics of Polycarbonates, Interscience Publishers, New York, N.Y., 1964).

[0133] In the present context, dihydroxy compounds suitable for the preparation of the polycarbonates of the invention conform to the structural formulae (1) or (2) below.

##STR00001##

[0134] Wherein A denotes an alkylene group with 1 to 8 carbon atoms, an alkylidene group with 2 to 8 carbon atoms, a cycloalkylene group with 5 to 15 carbon atoms, a cycloalkylidene group with 5 to 15 carbon atoms, a carbonyl group, an oxygen atom, a sulfur atom, SO or SO.sub.2 or a radical conforming to (3)

##STR00002##

[0135] e and g both denote the number 0 to 1;

[0136] Z denotes F, Cl, Br or C.sub.1-C.sub.4-alkyl and if several Z radicals are substituents in one aryl radical, they may be identical or different from one another;

[0137] d denotes an integer of from 0 to 4; and

[0138] f denotes an integer of from 0 to 3.

[0139] Among the dihydroxy compounds useful in the practice of the invention are hydroquinone, resorcinol, bis-(hydroxyphenyl)-alkanes, bis-(hydroxyl-phenyl)-ethers, bis-(hydroxyphenyl)-ketones, bis-(hydroxyl-phenyl)-sulfoxides, bis-(hydroxyphenyl)-sulfides, bis-(hydroxyphenyl)-sulfones, and ,-bis-(hydroxyphenyl)-diisopropylbenzenes, as well as their nuclear-alkylated compounds. These and further suitable aromatic dihydroxy compounds are described, for example, in U.S. Pat. Nos. 5,401,826, 5,105,004; 5,126,428; 5,109,076; 5,104,723; 5,086,157; 3,028,356; 2,999,835; 3,148,172; 2,991,273; 3,271,367; and 2,999,846, the contents of which are incorporated herein by reference.

[0140] Further examples of suitable bisphenols are 2,2-bis-(4-hydroxyphenyl)-propane (bisphenol A), 2,4-bis-(4-hydroxyphenyl)-2-methyl-butane, 1,1-bis-(4-hydroxyphenyl)-cyclohexane, ,-bis-(4-hydroxy-phenyl)-p-diisopropylbenzene, 2,2-bis-(3-methyl-4-hydroxyphenyl)-propane, 2,2-bis-(3-chloro-4-hydroxyphenyl)-propane, 4,4-dihydroxy-diphenyl, bis-(3,5-dimethyl-4-hydroxyphenyl)-methane, 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane, bis-(3,5-dimethyl-4-hydroxyphenyl)-sulfide, bis-(3,5-dimethyl-4-hydroxy-phenyl)-sulfoxide, bis-(3,5-dimethyl-4-hydroxyphenyl)-sulfone, dihydroxy-benzophenone, 2,4-bis-(3,5-dimethyl-4-hydroxyphenyl)-cyclohexane, ,-bis-(3,5-dimethyl-4-hydroxyphenyl)-p-diisopropyl-benzene and 4,4-sulfonyl diphenol.

[0141] Examples of particularly preferred aromatic bisphenols are 2,2-bis-(4-hydroxyphenyl)-propane, 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane, 1,1-bis-(4-hydroxyphenyl)-cyclohexane and 1,1-bis-(4-hydroxy-phenyl)-3,3,5-trimethylcyclohexane. The most preferred bisphenol is 2,2-bis-(4-hydroxyphenyl)-propane (bisphenol A).

[0142] The polycarbonates useful in producing the laminates of the invention may entail in their structure units derived from one or more of the suitable bisphenols.

[0143] Among the resins suitable in the practice of the invention are phenolphthalein-based polycarbonate, copolycarbonates and terpolycarbonates such as are described in U.S. Pat. Nos. 3,036,036 and 4,210,741, both of which are incorporated by reference herein.

[0144] The polycarbonates useful in preparing the laminates of the invention may also be branched by condensing therein small quantities, e.g., 0.05 to 2.0 mol % (relative to the bisphenols) of polyhydroxyl compounds. Polycarbonates of this type have been described, for example, in German Offenlegungsschriften 1,570,533; 2,116,974 and 2,113,374; British Patents 885,442 and 1,079,821 and U.S. Pat. No. 3,544,514, which is incorporated herein by reference. The following are some examples of polyhydroxyl compounds which may be used for this purpose: phloroglucinol; 4,6-dimethyl-2,4,6-tri-(4-hydroxy-phenyl)-heptane; 1,3,5-tri-(4-hydroxyphenyl)-benzene; 1,1,1-tri-(4-hydroxyphenyl)-ethane; tri-(4-hydroxyphenyl)-phenyl-methane; 2,2-bis-[4,4-(4,4-dihydroxydiphenyl)]-cyclohexyl-propane; 2,4-bis-(4-hydroxy-1-isopropylidine)-phenol; 2,6-bis-(2-dihydroxy-5-methylbenzyl)-4-methyl-phenol; 2,4-dihydroxybenzoic acid; 2-(4-hydroxy-phenyl)-2-(2,4-dihydroxy-phenyl)-propane and 1,4-bis-(4,4-dihydroxytri-phenylmethyl)-benzene. Some of the other polyfunctional compounds are 2,4-dihydroxy-benzoic acid, trimesic acid, cyanuric chloride and 3,3-bis-(4-hydroxyphenyl)-2-oxo-2,3-dihydroindole.

[0145] In addition to the polycondensation process mentioned above, other processes for the preparation of the polycarbonates of the invention are polycondensation in a homogeneous phase and transesterification. Suitable processes are disclosed in U.S. Pat. Nos. 3,028,365; 2,999,846; 3,153,008; and 2,991,273 which are incorporated herein by reference.

[0146] The preferred process for the preparation of polycarbonates is the interfacial polycondensation process. Other methods of synthesis in forming the polycarbonates useful in the invention, such as disclosed in U.S. Pat. No. 3,912,688, incorporated herein by reference, may be used. Suitable polycarbonate resins are available in commerce, for instance, from Bayer MaterialScience under the MAKROLON trademark. The polycarbonate is preferably used in the form of panels, (sheets) or films in the laminates. Suitable polycarbonate laminates are available from Bayer MaterialScience under the HYGARD trademark.

[0147] Aliphatic thermoplastic polyurethanes are preferred in the laminate useful in the present invention such as those prepared according to U.S. Pat. No. 6,518,389, the entire contents of which are incorporated herein by reference. Particularly preferred are thermoplastic polyurethane based on aliphatic chemistries to resist color changes from ultraviolet radiation exposure, especially ultraviolet radiation such as found in natural sunlight.

[0148] Thermoplastic polyurethane elastomers are well known to those skilled in the art. They are of commercial importance due to their combination of high-grade mechanical properties with the known advantages of cost-effective thermoplastic processability. A wide range of variation in their mechanical properties can be achieved by the use of different chemical synthesis components. A review of thermoplastic polyurethanes, their properties and applications is given in Kunststoffe [Plastics] 68 (1978), pages 819 to 825, and in Kautschuk, Gummi, Kunststoffe [Natural and Vulcanized Rubber and Plastics] 35 (1982), pages 568 to 584.

[0149] Thermoplastic polyurethanes are synthesized from linear polyols, mainly polyester diols or polyether diols, organic diisocyanates and short chain diols (chain extenders). Catalysts may be added to the reaction to speed up the reaction of the components.

[0150] The relative amounts of the components may be varied over a wide range of molar ratios in order to adjust the properties. Molar ratios of polyols to chain extenders from 1:1 to 1:12 have been reported. These result in products with hardness values ranging from 80 Shore A to 75 Shore D.

[0151] Thermoplastic polyurethanes can be produced either in stages (prepolymer method) or by the simultaneous reaction of all the components in one step (one shot). In the former, a prepolymer formed from the polyol and diisocyanate is first formed and then reacted with the chain extender. Thermoplastic polyurethanes may be produced continuously or batch-wise. The best-known industrial production processes are the so-called belt process and the extruder process.

[0152] Examples of the suitable polyols include difunctional polyether polyols, polyester polyols, and polycarbonate polyols. Small amounts of trifunctional polyols may be used, yet care must be taken to make certain that the thermoplasticity of the thermoplastic polyurethane remains substantially un-effected.

[0153] Suitable polyester polyols include those which are prepared by polymerizing -caprolactone using an initiator such as ethylene glycol, ethanolamine and the like. Further suitable examples are those prepared by esterification of polycarboxylic acids. The polycarboxylic acids may be aliphatic, cycloaliphatic, aromatic and/or heterocyclic and they may be substituted, e.g., by halogen atoms, and/or unsaturated. The following are mentioned as examples: succinic acid; adipic acid; suberic acid; azelaic acid; sebacic acid; phthalic acid; isophthalic acid; trimellitic acid; phthalic acid anhydride; tetrahydrophthalic acid anhydride; hexahydrophthalic acid anhydride; tetrachlorophthalic acid anhydride, endomethylene tetrahydrophthalic acid anhydride; glutaric acid anhydride; maleic acid; maleic acid anhydride; fumaric acid; dimeric and trimeric fatty acids such as oleic acid, which may be mixed with monomeric fatty acids; dimethyl terephthalates and bis-glycol terephthalate. Suitable polyhydric alcohols include, e.g., ethylene glycol; propylene glycol-(1,2) and -(1,3); butylene glycol-(1,4) and -(1,3); hexanediol-(1,6); octanediol-(1,8); neopentyl glycol; (1,4-bis-hydroxy-methylcyclohexane); 2-methyl-1,3-propanediol; 2,2,4-tri-methyl-1,3-pentanediol; triethylene glycol; tetraethylene glycol; polyethylene glycol; dipropylene glycol; polypropylene glycol; dibutylene glycol and polybutylene glycol, glycerine and trimethlyolpropane.

[0154] Suitable polyisocyanates for producing the thermoplastic polyurethanes useful in the laminates may be, for example, organic aliphatic diisocyanates including, for example, 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 2,2,4-trimethyl-1,6-hexamethylene diisocyanate, 1,12-dodecamethylene diisocyanate, cyclohexane-1,3- and -1,4-diisocyanate, 1-isocyanato-2-isocyanatomethylcyclopentane, 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethyl-cyclohexane (isophorone diisocyanate or IPDI), bis-(4-isocyanatocyclohexyl)-methane, 2,4-dicyclohexylmethane diisocyanate, 1,3- and 1,4-bis-(isocyanatomethyl)-cyclohexane, bis-(4-isocyanato-3-methylcyclohexyl)-methane, ,,,-tetramethyl-1,3- and/or -1,4-xylylene diisocyanate, 1-isocyanato-1-methyl-4(3)-isocyanatomethyl cyclohexane, 2,4- and/or 2,6-hexahydrotoluylene diisocyanate, and mixtures thereof.

[0155] Preferred chain extenders with molecular weights of 62 to 500 include aliphatic diols containing 2 to 14 carbon atoms, such as ethanediol, 1,6-hexanediol, diethylene glycol, dipropylene glycol, and 1,4-butanediol in particular, for example. However, diesters of terephthalic acid with glycols containing 2 to 4 carbon atoms are also suitable, such as terephthalic acid-bis-ethylene glycol or -1,4-butanediol for example, or hydroxyalkyl ethers of hydroquinone, such as 1,4-di-(-hydroxyethyl)-hydroquinone for example, or (cyclo)aliphatic diamines, such as isophorone diamine, 1,2- and 1,3-propylenediamine, N-methyl-propylenediamine-1,3 or N,N-dimethyl-ethylenediamine, for example, and aromatic diamines, such as toluene 2,4- and 2,6-diamines, 3,5-diethyltoluene 2,4- and/or 2,6-diamine, and primary ortho-, di-, tri- and/or tetraalkyl-substituted 4,4-diaminodiphenylmethanes, for example. Mixtures of the aforementioned chain extenders may also be used. Optionally, triol chain extenders having a molecular weight of 62 to 500 may also be used. Moreover, customary monofunctional compounds may also be used in small amounts, e.g., as chain terminators or demolding agents. Alcohols such as octanol and stearyl alcohol or amines such as butylamine and stearylamine may be cited as examples.

[0156] To prepare the thermoplastic polyurethanes, the synthesis components may be reacted, optionally in the presence of catalysts, auxiliary agents and/or additives, in amounts such that the equivalent ratio of NCO groups to the sum of the groups which react with NCO, particularly the OH groups of the low molecular weight diols/triols and polyols, is 0.9:1.0 to 1.2:1.0, preferably 0.95:1.0 to 1.10:1.0.

[0157] Suitable catalysts include tertiary amines which are known in the art, such as triethylamine, dimethyl-cyclohexylamine, N-methylmorpholine, N,N-dimethyl-piperazine, 2-(dimethyl-aminoethoxy)-ethanol, diazabicyclo-(2,2,2)-octane and the like, for example, as well as organic metal compounds in particular, such as titanic acid esters, iron compounds, tin compounds, e.g., tin diacetate, tin dioctoate, tin dilaurate or the dialkyltin salts of aliphatic carboxylic acids such as dibutyltin diacetate, dibutyltin dilaurate or the like. The preferred catalysts are organic metal compounds, particularly titanic acid esters and iron and/or tin compounds.

[0158] In addition to difunctional chain extenders, small quantities of up to about 5 mol. %, based on moles of the bifunctional chain extender used, of trifunctional or more than trifunctional chain extenders may also be used.

[0159] Trifunctional or more than trifunctional chain extenders of the type in question are, for example, glycerol, trimethylolpropane, hexanetriol, pentaerythritol and triethanolamine.

[0160] Suitable thermoplastic polyurethanes are available in commerce, for example, from Bayer MaterialScience under the TEXIN and DUREFLEX trademarks. The thermoplastic polyurethanes are preferably used in the present invention in the form of films or sheets.

[0161] The polycarbonate laminate of the present invention may also include one or more additives that may inhibit harmful effects of sunlight or other radiation, such as UV or IR-blocking additives. In addition, the polycarbonate laminate may further comprise additives, or be composed of materials, which may inhibit the transmission of various radio frequencies, signals or RF-waves. Such compositions or additives may be incorporated into the polycarbonate laminate, or may be in an additional layer that is applied to the surface of the polycarbonate laminate.

[0162] As used herein, the term glass includes not only window glass, plate glass, silicate glass, aluminosilicate glasses, sheet glass, tempered glass, chemically treated glass and float glass, but also colored glass, specialty glass which includes ingredients to control, for example, solar heating, coated glass with, for example, sputtered metals, such as silver or indium tin oxide, for solar control purposes and other specialty glasses. The type and thickness of the glass selected for a particular laminate depends on the intended use.

Example

[0163] The present invention is further illustrated, but is not to be limited, by the following description. The thicknesses and other dimensions provided in describing the various aspects of the invention shown in the Figures are for descriptive purposes and those skilled in the art will recognize the invention is not limited to only those dimensions. The inventive rapid deployment cover system and its elements may be of those dimensions necessary to fulfill the intended purpose.

[0164] In the following descriptions and Figures, the reference numbers are used to refer to the following: 1wall; 21200 mm1200 mm Level 8 forced entry/blast resistant (FEBR) glass-clad polycarbonate laminate; 21200 mm1200 mm Level 3 forced entry/blast resistant (FEBR) polycarbonate laminate; 3track back plate; 4track bars; 5track front plate; 63.5 inch hex bolt; 74 inch hex bolt; 81.75 inch hex bolt; 9glazing tape; 10glazing tape; 11ethylene propylene diene monomer (EPDM) sleeve; 12bushing; 13pressure plate; 14glazing tape; 15glazing tape; 16air baffle; 17setting block; 18pressure plate cover; 19ethylene propylene diene monomer (EPDM) washer; 20lockout, nylon insert; 21steel washer; 22steel washer; 230.5 inch steel split lock washer; 24threaded sleeve element (HILTI HIS-RN); 25injectable mortar (HILTI HIT-HY 150 MAX); 26backer rod; 27perimeter silicone sealant (DOW 995); 28shims; 30tamper-proof nut and matching key (McGard); and 31mounting track.

[0165] In one embodiment of the present invention, as shown in FIGS. 1-50, the rapid deployment cover system comprises at least a mounting track, a polycarbonate laminate, a pressure plate and, optionally, a pressure plate cover. In this embodiment of the invention, the rapid deployment cover system is installed to cover up an unwanted or unexpected opening in an exterior wall of a building, such as one created by an external blast to a building, or the destruction of a window. The mounting track is first applied to the exterior wall, and is fixed in place by bolts, which are installed inside holes that are drilled into the wall. The holes drilled into the wall are also referred to herein as anchor holes. The bolts that fit into the anchor holes, and/or additional bolts, are used to attach the pressure plate and polycarbonate laminate to the mounting track. The bolts that are attached to the pressure plate are surrounded by elastomeric sleeves, within holes that are drilled into the polycarbonate laminate. The pressure plate and mounting track are located on opposite sides of the polycarbonate laminate, and, when installed, provide a frame for the polycarbonate laminate to keep it in place. The pressure plate may optionally include a pressure plate cover, to give the cover an appearance or resemblance of a window or other architectural feature of an exterior wall, and may also provide additional protection against a forced entry attack. Although a pressure plate cover is shown in the drawings, a preferred embodiment of the present invention does not include a pressure plate cover.

[0166] FIGS. 1A through 14A illustrate various elements of the glass-clad polycarbonate laminate rapid deployment cover system of the present invention. FIG. 1A shows a front view of the glass-clad polycarbonate laminate rapid deployment cover system of the present invention, with the pressure plate and pressure plate cover shown in outline to view the positioning of each component in relationship to the others.

[0167] FIG. 2A shows a view of section B-B of the rapid deployment cover system depicted in FIG. 1A. As shown in FIG. 2A, mounting track 31 is fixedly attached to the wall by use of hex bolt 8 within threaded sleeve element 24. Injectable mortar 25 may be used to provide further stability for hex bolt 8 within threaded sleeve element 24. One or more shims 28 are preferably placed in between the mounting track and the wall, about hex bolt 8, to allow the rapid deployment cover system to be as flush as possible with the wall, even when the surface of the wall is uneven, such as when the wall has protrusions or indentations. In another preferred embodiment of the present invention, the one or more shims 28 will provide a space of at least 0.25 inches (or 0.64 cm) between the wall 1 and the mounting track 31. The shims 28 are preferably constructed of an elastomeric material, such as ethylene propylene diene monomer (EPDM). The shims 28 are preferably shaped in a C configuration, to allow for quick and easy installation.

[0168] FIG. 3A shows a view of section C-C of the rapid deployment cover system depicted in FIG. 1A. As shown in FIG. 3A, hex bolt 6 is used to secure the polycarbonate/glass laminate 2 to mounting track 31, specifically within mounting track bars 4 and mounting track plate 5, and also to pressure plate 13. Cover 18 is also shown about pressure plate 13, to inhibit external access to hex bolt 6, once the rapid deployment cover system is deployed. Also as shown in FIG. 3A, sleeve 11 surrounds hex bolt 6 within the polycarbonate laminate 2. While sleeve 11 is shown in FIG. 3A to completely surround hex bolt 6, sleeve 11 may only substantially surround hex bolt 6, surrounding only a majority of hex bolt 6, or greater than 180 degrees. As noted above, sleeve 11 may be constructed of an elastomer, such as ethylene propylene diamine monomer (EPDM) which acts to cushion the polycarbonate against stresses relative to hex bolt 6, which may be caused by a temperature change, an external blast, a force against the polycarbonate laminate, or a force against the mounting frame itself, such as one caused by a crowbar. As further shown in FIG. 3A, a bushing 12 may be included between sleeve 11 and hex bolt 6, for ease of installation, as well as retaining the position of each component when a stress is applied. Bushing 12 may be flanged, and may be constructed of aluminum, or other material compatible with the securement of hex bolt 6. It is believed that sleeve 11 may act in conjunction with the polycarbonate laminate 2, to provide additional flexibility, such that the rapid deployment cover system may bend, and not crack, with additional force to greater withstand any attempts to penetrate or remove it. In a preferred embodiment of the present invention, the elastomeric construction of the shims and sleeves offer additional flexibility beyond that offered by the construction of polycarbonate alone. For example, if a blast outside the rapid deployment cover system should occur, the system's components may appropriately bend and/or flex in response to such force.

[0169] FIG. 4A shows the rapid deployment cover system of the present invention mounted on an existing opening. As shown in FIG. 4A, none of the bolts, sleeves, shims, or other parts are visible from the outside, and remain inaccessible once installed. However, because of the construction of the rapid deployment cover system, the opening may nonetheless be visible through the use of a transparent polycarbonate laminate.

[0170] FIG. 5A shows a view of section A-A of the rapid deployment cover system depicted in FIG. 1A, in a location where there is no bolt connecting the components to each other. As shown in FIG. 5A, the mounting track 31 is located adjacent to, but not abutting, the wall, in view of the use of one or more shims at the attachment points (not shown). The polycarbonate/glass laminate 2, pressure plate 13 and pressure plate cover 18 are also shown.

[0171] FIG. 6A shows the glass-clad polycarbonate laminate embodiment of the rapid deployment cover system of the present invention with tamper-proof nuts. One or more tamper-proof nuts may be used in conjunction with the present invention, such that even if a potential intruder manages to remove the pressure plate cover from the pressure plate, he or she still may encounter great difficulty in untighting and removing bolts that secure the pressure plate to the mounting frame, and/or the rapid deployment cover system to the wall. In another embodiment of the invention, a pressure plate cover may not be used.

[0172] FIG. 7A shows a view of section D-D of one embodiment of the rapid deployment cover system depicted in FIG. 6A. As shown in FIG. 7A, the bolts that affix the mounting track 31 to the wall 1, may not be the same bolts that connect the pressure plate 13 and polycarbonate laminate 2 to the mounting track 31. Furthermore, bolts through the polycarbonate layer 2 should be spaced at least 3 inches (or 7.6 cm) apart from one another, preferably 6 inches (or 13.2 cm) apart from one another, to allow for sufficient flexibility in case of a blast or other force upon the structure of the rapid deployment cover system of the present invention. Further, as shown in FIG. 7A, there may only be two attachments to the wall per side of the rapid deployment cover system, or a total of 8 attachments to the wall. In another embodiment of the invention, there is only one attachment to the wall per side, for a total of 4 attachments to the wall. The small number of attachments to the wall allows for faster and easier installation, which can be especially useful when it is desirable to minimize the time installers may spend outside of a secured building or area.

[0173] FIG. 8A shows a view of section E-E of the rapid deployment cover system depicted in FIG. 6A. FIG. 9A shows a view of detail F of the rapid deployment cover system depicted in FIG. 7A. FIG. 10A shows a view of detail G of the rapid deployment cover system depicted in FIG. 8A. FIG. 11A shows a view of detail H of the rapid deployment cover system depicted in FIG. 8A with pre-compression of the glazing tape with the laminate shown at 110. FIG. 12A shows a view of detail I of the rapid deployment cover system depicted in FIG. 7A having a lockout nut with nylon insert 120 (torque to 15 ft-lbs).

[0174] FIGS. 1B through 12B illustrate various elements of the polycarbonate laminate rapid deployment cover system of the present invention, without any glass, that correspond to the descriptions above of FIGS. 1A through 14A, which include a glass-clad polycarbonate laminate. FIG. 1B shows a front view of the polycarbonate laminate rapid deployment cover system of the present invention. FIG. 2B shows a view of section B-B of the rapid deployment cover system depicted in FIG. 1B. FIG. 3B shows a view of section C-C of the rapid deployment cover system depicted in FIG. 1B. FIG. 4B shows the rapid deployment cover system of the present invention mounted on an existing opening. FIG. 5B shows a view of section A-A of the rapid deployment cover system depicted in FIG. 1B.

[0175] FIG. 6B depicts the polycarbonate laminate embodiment of the rapid deployment cover system of the present invention with tamper-proof nuts. FIG. 7B shows a view of section D-D of the rapid deployment cover system depicted in FIG. 6B. FIG. 8B shows a view of section E-E of the rapid deployment cover system depicted in FIG. 6B. FIG. 9B shows a view of detail F of the rapid deployment cover system depicted in FIG. 7B. FIG. 10B shows a view of detail G of the rapid deployment cover system depicted in FIG. 8B. FIG. 11B shows a view of detail H of the rapid deployment cover system depicted in FIG. 8B with pre-compression of the glazing tape with the laminate shown at 110. FIG. 12B shows a view of detail I of the rapid deployment cover system depicted in FIG. 7B having a lockout nut with nylon insert 120 (torque to 15 ft-lbs).

[0176] FIG. 13 shows another embodiment of the rapid deployment cover system of the present invention. FIG. 14 shows a view of section J-J of the rapid deployment cover system depicted in FIG. 13.

[0177] FIGS. 15A through 18A refer to a glass-clad polycarbonate laminate used in one embodiment of the rapid deployment cover system of the present invention. FIG. 15A shows a view of the threat side of the laminate. Drilled hole surface areas 150 may preferably be sealed with a elastomeric sealant (e.g., DOW 995-thickness <0.030) and excess silicone removed from the external surface for all holes. FIG. 16A shows a top-down view of the threat and protection sides of the laminate depicted in FIG. 15A. FIG. 17A shows a perspective view illustrating the threat side of the glass-clad polycarbonate laminate used in the rapid deployment cover system of the present invention with the shaded area being a single layer of glass, multiple layers of glass or a glass laminate. As shown in FIG. 17A, a plurality of holes is drilled through the polycarbonate laminate 2. It has been found that a hole of about 2 inches (about 5 cm) in diameter is large enough to accommodate both an elastomeric sleeve and a bolt to sufficiently support to the polycarbonate laminate in case of an external force, such that the polycarbonate laminate may bend and/or flex in response to that force without cracking. The elastomeric sleeve will also deform when the rapid deployment cover system experiences a force, such that less force will be placed upon the polycarbonate laminate. In addition, the holes of the polycarbonate laminate should be positioned away from the edge of the laminate to prevent the holes from tearing through to the edge of the laminate when there is a blast. Preferably the holes are located more than 0.25 inches (0.64 cm) away from the edge of the polycarbonate laminate, most preferably 3 inches (7.62 cm) or more away from the edge. FIG. 18A shows a detail view of the layer structure taken at A in FIG. 16A.

[0178] FIG. 15B shows a view of the threat side of the polycarbonate laminate used in one embodiment of the rapid deployment cover system of the present invention. Drilled hole surface areas 150 may preferably be sealed with a elastomeric sealant (e.g., DOW 995-thickness <0.030) and excess silicone removed from the external surface for all holes. FIG. 16B shows a top-down view of the threat and protection sides of the laminate depicted in FIG. 15B. FIG. 17B shows a perspective view illustrating the threat side of the polycarbonate laminate 2 used in the rapid deployment cover system of the present invention. FIG. 18B shows a detail view of the layer structure taken at A in FIG. 16B.

[0179] FIGS. 19 through 29 illustrate various elements of the mounting track used to hold the laminate in the rapid deployment cover system of the present invention. FIG. 19 shows the wall side of the mounting track. FIG. 20 shows the panel (laminate) side of the mounting track. FIG. 21 shows a view of section A-A of the mounting track depicted in FIG. 20. FIG. 22 shows a view of section B-B of the mounting track depicted in FIG. 20. FIG. 23 shows a view of section C-C of the mounting track depicted in FIG. 20. FIG. 24 shows a view of detail E of the mounting track depicted in FIG. 20. FIG. 25 shows a view of detail G of the mounting track depicted in FIG. 20. FIG. 26 shows a view of detail F of the track depicted in FIG. 20. As noted in FIGS. 25 and 26, the bolt attached to the wall may be moved slightly from side to side, and still fit within the mounting track. This flexibility in placement allows for easier installation, especially in metal reinforced walls where a bolt may not be embedded in the wall in certain locations. If, for example, rebar is found in one location where a user wishes to attach a bolt to the wall, he or she may instead install the bolt at an adjacent location without having to alter the location of the mounting track. FIG. 27 shows the panel (laminate) side of the mounting track used to hold the laminate in the rapid deployment cover system of the present invention with glazing tape at 270. FIG. 28 shows the wall side of the mounting track used to hold the laminate in the rapid deployment cover system of the present invention. FIG. 29 shows a perspective view of the mounting track used to hold the laminate in the rapid deployment cover system of the present invention.

[0180] FIGS. 30 through 32 illustrate the elastomeric sleeve used in the rapid deployment cover system of the present invention. In a preferred embodiment of the present invention, the elastomeric sleeve has a thickness of about 0.535 inches (or about 1.36 cm), to accommodate a bolt of sufficient structural strength, and a hole in the polycarbonate laminate of about 2 inches (about 5.1 cm). In this embodiment, the diameter of the hole is approximately 3.7 times the thickness of the elastomeric sleeve. FIG. 30 shows a front view of the elastomeric sleeve. Although a variety of elastomeric materials may be used to make the sleeve, preference is given to peroxide cured ethylene propylene diene monomer (EPDM) rubber with about a 40+/5 Shore A hardness, 1450 psi minimum tensile strength and 400% elongation. FIG. 31 shows a cross-section view of the elastomeric sleeve. FIG. 32 shows a perspective view of the elastomeric sleeve.

[0181] FIGS. 33 through 35 illustrate the bushing used in the rapid deployment cover system of the present invention. FIG. 33 shows a front view of the bushing. FIG. 34 shows a cross-section view of the bushing. FIG. 35 shows a perspective view of the bushing.

[0182] FIGS. 36A through 46A illustrate various elements of the pressure plate used with the glass-clad polycarbonate laminate in one embodiment of the rapid deployment cover system of the present invention. FIG. 36A shows a front view of the pressure plate. A 45-degree miter cut and weld on each corner is depicted at 360. The entire joint length may preferably be sealed with an elastomeric sealant (e.g., Dow 995) on the exterior surface. FIG. 37A shows an edge view of the pressure plate with air holes 370 preferably on the bottom side only. FIG. 38A shows a view of section A-A of the pressure plate depicted in FIG. 36A having air baffles 380 preferably on the bottom only to cover air holes. The baffles 380 are preferably adhered with an elastomeric sealant (e.g., Dow 995). Setting blocks 385 may also be provided preferably on the bottom only and preferably made of ethylene propylene diene monomer (EPDM) rubber and adhered with an elastomeric sealant (e.g., Dow 995). FIG. 39A shows a view of section B-B of the pressure plate depicted in FIG. 36A with glazing tape 390. FIG. 40A shows a view of detail C of the pressure plate depicted in FIG. 36A. FIG. 41A shows a view of detail D of the pressure plate depicted in FIG. 36A. FIG. 42A shows a view of detail E of the pressure plate depicted in FIG. 36A. FIG. 43A shows a view of detail F of the pressure plate depicted in FIG. 36A. FIG. 44A shows a perspective view of the pressure plate with air baffles 440 and setting block 445. FIG. 45A shows a front view of the pressure plate. FIG. 46A shows a detail view of detail G of the pressure plate depicted in FIG. 45A with 460 denoting glazing tape and 465 indicating the position where a 1/16 inch bead of elastomeric sealant (e.g., Dow 995) is placed on the glass side only at each corner.

[0183] FIGS. 36B through 46B illustrate various elements of the pressure plate used with the polycarbonate laminate in one embodiment of the rapid deployment cover system of the present invention. FIG. 36B shows a front view of the pressure plate. A 45-degree miter cut and weld on each corner is depicted at 360. FIG. 37B shows an edge view of the pressure plate with air holes 370 preferably on the bottom side only. FIG. 38B shows a view of section A-A of the pressure plate depicted in FIG. 36B having air baffles 380 preferably on the bottom only to cover air holes. The baffles 380 are preferably adhered with an elastomeric sealant (e.g., Dow 995). FIG. 39B shows a view of section B-B of the pressure plate depicted in FIG. 36B with glazing tape 390. Elastomeric sealant (e.g., Dow 995) is preferably applied around all four edges at 393. A clearance hole may be drilled into the pressure plate at 395 and a self drilling sheet metal screw drilled into the aluminum square tubing guided by the clearance hole 395 FIG. 40B shows a detail view of detail C of the pressure plate depicted in FIG. 36B. FIG. 41B shows a detail view of detail D of the pressure plate depicted in FIG. 36B. FIG. 42B shows a detail view of detail E of the pressure plate depicted in FIG. 36B. FIG. 43B shows a detail view of detail F of the pressure plate depicted in FIG. 36B with screws 430 sealed with an elastomeric sealant (e.g., Dow 995). FIG. 44B shows a perspective view of the pressure plate with air baffles 440. FIG. 45B shows a front view of the pressure plate used with the polycarbonate laminate in one embodiment of the rapid deployment cover system of the present invention. FIG. 46B shows a detail view of detail G of the pressure plate depicted in FIG. 45B with 460 denoting glazing tape and 465 indicating the position where a 1/16 inch bead of elastomeric sealant (e.g., Dow 995) is placed on the glass side only at each corner.

[0184] FIGS. 47 through 50 illustrate the frame cover used in the rapid deployment cover system of the present invention. FIG. 47 shows a front view of the frame cover. FIG. 48 shows an edge view of the frame cover with air holes 480 preferably only in the bottom side. FIG. 49 shows a view of section A-A of the frame cover depicted in FIG. 47 with both covers being identical. FIG. 50 shows a perspective view of the frame cover depicted in FIG. 47.

[0185] FIGS. 51 through 53 illustrate the elastomeric washer used in the rapid deployment cover system of the present invention. Although any of a variety of elastomeric materials may be used to make the washer, preference is given to ethylene propylene diene monomer (EPDM) rubber. FIG. 51 shows a front view of the elastomeric washer. FIG. 52 shows a cross-section view of the elastomeric washer. FIG. 53 shows a perspective view of the elastomeric washer. Double sided tape may be applied to one side 530 of the washer.

[0186] The rapid deployment cover system of the present invention were tested for forced-entry, ballistics and blast resistance with the following results:

TABLE-US-00001 Severe Storm DoE Standard Forced-Entry Blast 1020* (*wind US Dept Ballistics UL (*laminant and tornado Cover Type of State Standard 752 only) hazard only) glass-clad 15R-minute UL 8 *>41 psi compliant polycarbonate simulated assault polycarbonate 15N-minute UL 3 *>41 psi compliant simulated assault

[0187] Also, it is contemplated that any optional feature of the inventive variations described may be set forth and claimed independently, or in combination with any one or more of the features described herein. Reference to a singular item, includes the possibility that there are plural of the same items present. More specifically, as used herein and in the appended claims, the singular forms a, an, said, and the include plural referents unless the specifically stated otherwise. In other words, use of the articles allow for at least one of the subject item in the description above as well as the claims below. It is further noted that the claims may be drafted to exclude any optional element. As such, this statement is intended to serve as antecedent basis for use of such exclusive terminology as solely, only and the like in connection with the recitation of claim elements, or use of a negative limitation. Without the use of such exclusive terminology, the term comprising in the claims shall allow for the inclusion of any additional elementirrespective of whether a given number of elements are enumerated in the claim, or the addition of a feature could be regarded as transforming the nature of an element set forth in the claims. Stated otherwise, unless specifically defined herein, all technical and scientific terms used herein are to be given as broad a commonly understood meaning as possible while maintaining claim validity.

[0188] The foregoing examples of the present invention are offered for the purpose of illustration and not limitation. It will be apparent to those skilled in the art that the embodiments described herein may be modified or revised in various ways without departing from the spirit and scope of the invention. The scope of the invention is to be measured by the appended claims.