CURTAINWALL SYSTEM

Abstract

A modular curtainwall system and a method for forming a curtainwall unit are provided. The modular curtainwall system comprises a unit frame and a cassette. The cassette comprises a subframe and an interior portion. The stick unit frame and cassette may be assembled into a curtainwall unit at an offsite facility.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an in-fill cassette in accordance with one embodiment of the invention.

FIG. 2 illustrates an in-fill cassette in accordance with another embodiment of the invention.

FIG. 3 illustrates an insulation secondary cassette in accordance with one embodiment of the invention.

FIG. 4 illustrates an exploded view of a unit frame in accordance with one embodiment of the invention.

FIG. 5 illustrates an assembled unit frame in accordance with one embodiment of the invention.

FIG. 6 illustrates an exploded view of a unit frame and three in-fill cassettes in accordance with one embodiment of the invention.

FIG. 7 illustrates an exploded view of a unit frame having three in-fill cassettes placed therein and a secondary cassette in accordance with one embodiment of the invention.

FIG. 8 illustrates an assembled curtainwall unit in accordance with one embodiment of the invention.

FIG. 9 illustrates an assembled curtainwall unit having a large operable in-fill cassette in accordance with one embodiment of the invention.

FIG. 10 illustrates an assembled curtainwall unit having a small operable in-fill cassette in accordance with one embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

A modular curtainwall system is provided. The curtainwall system includes a unit frame 14 (see, for example, FIG. 5) and a cassette 10, 12 (see, for example, FIGS. 1, 2, and 3). The cassette 10, 12 is a modular component that can be easily inserted into the unit frame 14 to form a curtainwall unit.

The cassette 10, 12 includes a subframe 16 and an interior portion 17. The subframe 16 is the portion of the cassette 10, 12 extending along the periphery of the cassette 10, 12. The subframe 16 may be metal or other suitable material for framing the interior portion 17 and being received by the unit frame 14. The interior portion 17 is the portion of the cassette 10, 12 that is located within the subframe 16. In some embodiments, more than one interior portion 17 may be provided. For example, two layers of interior portion may be provided, one facing towards the interior of the building as constructed and one facing towards the exterior of the building as constructed. The interior portion 17 is sealed to the subframe 16, for example using an adhesive, tape, wet sealant, dry gasket, or other suitable sealant.

Generally, at least two types of cassettes may be provided: in-fill cassettes 10 and secondary cassettes 12. In-fill cassettes 10 have an interior portion 17 that is viewable from the exterior of the building when constructed. Secondary cassettes 12 have an interior portion 17 that cannot be viewed from the exterior of the building when constructed. Conceptually, the in-fill cassette 10 is the portion most seen on the building when a viewer is looking at the outside of the building after construction.

FIGS. 1 and 2 illustrate in-fill cassettes. In-fill cassettes 10 may have interior portions 17 comprising glass, glass with operable mini-blinds, stone, metal panels, composite panels, treated wood panels, simulated wood panels, louvers, bird screens, shadow-box components (comprising glass, metal panels, etc.), metal extrusions, photovoltaic panels, perforated metal panels, electronic video screens, or other for forming a viewable cassette.

In-fill cassettes 10 may be operable or fixed. Fixed cassettes cannot be opened whereas operable cassettes can be opened. FIGS. 9 and 10 show a curtainwall unit comprising a unit frame 14 and three in-fill cassettes 10, 11 wherein at least one of the in-fill cassettes is an operable cassette 11. In the past, a gasket is apparent only on curtainwall units having operable portions such as operable windows. Thus, architects needed to review aesthetic considerations as well as practical considerations in deciding where to put operable portions. Further, once the decision was made to place an operable portion or a fixed portion, it was relatively difficult to change that decision as the aesthetics of the building would be changed. Using the modular curtainwall system, operable in-fill cassettes and fixed in-fill cassettes appear substantially the same. This makes the decision-making process of where to place operable in-fill cassettes easier insofar as aesthetic considerations need not be reviewed. Further, it makes it easier to change a plan from an operable in-fill cassette to a fixed in-fill cassette, or vice versa, as aesthetics of the building will not be altered.

In one embodiment, an operable glass in-fill cassette 11 is provided for forming an operable window that opens. Generally, in manufacturing the cassette, the top of the interior portion is hinged to the subframe. The interior portion is thus permitted to pivot within the subframe. To provide an operable cassette, the sides and bottom of the interior portion are not permanently sealed to the subframe.

FIG. 3 illustrates a secondary cassette. Secondary cassettes 12 may generally be thermal cassettes, vision enhancement cassettes, acoustic cassettes, combinations thereof, or other. Thus, for example, thermal secondary cassettes may have insulation interior portions. Vision enhancement secondary cassettes may have shadow box (e.g. glass, metal panels, painted panels, mirrors, etc.), wood panels, wall coverings (paper, vinyl, etc.) on a substrate, metal extrusions, etc. interior portions. Acoustic secondary cassettes may have drywall or other acoustic performance enhancement material interior portions. Any of the secondary cassettes may also include vapor barrier sheets.

In some embodiments, a cassette may include an in-fill interior and a secondary interior. For example, one side of the cassette may have in-fill glass and the other side of the cassette may have insulation.

The interior portion 17 of the cassette 10, 12 is inserted and sealed into the subframe 16 at a manufacturing facility, prior to shipment to the assembly facility. Sealing of the interior portion into the subframe may be done using any suitable sealant. For example, the sealant may be a wet sealant. In such embodiment, the wet sealing is thus done at the manufacturer.

FIGS. 4 and 5 illustrate the unit frame 14. The unit frame 14 may be assembled by a manufacturer and shipped to an assembly facility or may be shipped to an assembly facility as pieces or sticks 20, 22 (see FIG. 4). These pieces 20, 22 are assembled into the unit frame 14, for example by using screws, adding a dry gasket or other, etc.

Terminology—occasionally people refer to the metal mullions that are the aluminum sticks that form the assembly. This is confusing with the stick assembly process. Enclos refers to sticks as mullions. Thus, in some embodiments, the unit frame 14 may be provided as a mullion assembly, wherein the components 20, 22 of the mullion assembly are assembled into the frame. Generally, vertically extending components or mullions 22 and horizontally extending components or sticks 20 are provided. Each of the mullions 20, 22 may be provided with padding comprising a sealant. The padding may be provided along only a portion of the mullion, for example, at a corner of the mullion for joining to another mullion. The padding may be applied over any portion or on the entirety of the mullions, as suitable for the given application. The padding may be applied to the mullions in any suitable manner. For example, an adhesive backing may be applied on the padding and the padding applied to the mullion via the adhesive backing. When assembling the mullions into a unit frame, the portions of the mullions having padding applied thereto may be pressed together, or attached in any suitable manner, with the padding therebetween. Any suitable padding material may be used. For example, the padding may comprise foam, PVC, silicone sheeting, silicone impregnated open cell foam, or wet sealant. In one embodiment, this material may easily be torn such that excess of the padding between the mullions may be torn and removed.

Thus, components for forming the unit, including the unit frame 14 (either the assembled unit frame or mullions 20, 22 for forming the unit frame) and the cassette 10, 12 are assembled by a manufacturer (or by several manufacturers) and shipped to an assembly facility. At the assembly facility, the unit frame 14 may be assembled (if shipped unassembled) and the cassettes 10, 12 inserted therein. This is a final light assembly requiring little equipment and space wherein no wet sealant need be applied. In alternative embodiments, final assembly may be done onsite at the installation site. FIG. 6 illustrates a unit frame 14 and in-fill cassettes 10 for insertion in the unit frame 14. FIG. 7 illustrates a unit frame 14 having in-fill cassettes 10 inserted therein and a secondary cassette 12 for insertion in the unit frame 14. FIG. 8 illustrates an assembled curtainwall unit 30. The assembly facility may be a designated area of the construction site such that the curtainwall unit is formed from the modular pieces at the construction site.

In one embodiment, a primary seal is applied to the unit frame 14 to seal the cassette 10, 12 to the frame and a secondary seal is applied to the cassette 10, 12 for waterproofing. Compression may be applied to the primary seal when a male to female mullion connection is formed. A further seal may be provided between adjacent curtainwall units 30, each curtainwall unit comprising the unit frame 14 and cassette(s) 10, 12. Each of these seals may be provided in any suitable manner. In one embodiment, each seal comprises a gasket. In another embodiment, each seal comprises a coextruded seal. In various embodiments, the seals may comprise the same type of seal or may comprise different types of seals.

The modular curtainwall system is assembled into a curtainwall unit 30 at an offsite assembly facility or designated area of the construction site. A sealant may be applied to the unit frame 14, and the cassette 10, 12 is placed in the subframe 14. Any suitable sealant may be used. Examples of suitable sealants include silicone, a dry gasket, or a wet sealant. In one embodiments, a dry gasket is used to seal the insert in the subframe such that no curing time is required. Fasteners may be used to fasten the cassette 10, 12 to the unit frame 14.

An insulation secondary cassette 12 may be easily be installed in the unit frame 14 at the offsite facility. In prior art curtainwall systems, installing insulation was a relatively labor intensive process—requiring the use of corner pieces around insulation, etc. Using the modular curtainwall unit, an insulation secondary cassette 12 is placed in the unit frame 14. Other components, such as aesthetic aluminum for shadow box through glass, may be added, as desired. The components may be combined in any suitable manner. For example, an in-fill cassette 10 may be provided layered over the insulation secondary cassette 12 in the unit frame 14 such that the in-fill cassette 10 forms the exterior of the curtainwall unit 30 and the insulation secondary cassette 12 forms the interior of the curtainwall unit 30. Further, layers may be provided within the secondary cassette 12 such as a layer of insulation and a layer of drywall, the drywall facing toward the interior of the building when the building is constructed.

With the modular curtain wall system, a relatively large number of systems may be shipped to a suitable site, whether an assembly center, installation site, or designated area of the construction site. Wet sealant need not be used at the time of final assembly or installation at site In prior art systems, Because the silicone needed to cure and the units were laid flat during curing, through put was constrained by space. With the modular system, space does not constrain through put. Each curtainwall unit is easily assembled with minimal man power and reduced warehouse space is necessary because there is no longer a need to temporarily store the units during a cure time.

Although the present invention has been described with reference to preferred embodiments, persons skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.

Claims

1. A modular curtainwall system comprising: a unit frame;an in-fill cassette comprising an interior portion and a subframe; andwherein the in-fill cassette is configured to be inserted into the unit frame at an offsite facility to form a curtainwall unit.

2. The modular curtainwall system of claim 1, wherein the in-fill cassette comprises glass, glass with operable mini-blinds, stone, metal, composite, treated wood, simulated wood, a louver, a bird screen, shadow-box components, a metal extrusion, a photovoltaic panel, perforated metal, or an electronic video screens.

3. The modular curtainwall system of claim 1, wherein the unit frame is provided to the offsite facility as a plurality of mullions.

4. The modular curtainwall system of claim 3, wherein a padding is provided on each of the mullions.

5. The modular curtainwall system of claim 1, wherein the stick subframe includes a primary seal and the cassette includes a secondary seal.

6. The modular curtainwall system of claim 5, wherein at least one of the primary seal or the secondary seal comprises a gasket.

7. The modular curtainwall system of claim 5, wherein at least one of the primary seal and the secondary seal comprises a coextruded seal.

8. The modular curtainwall system of claim 1, wherein the cassette further comprises an operable mechanism for enabling opening of the glass portion.

9. The modular curtainwall system of claim 1, further comprising a secondary cassette, wherein the secondary cassette is inserted into the unit frame at the offsite facility.

10. The modular curtainwall system of claim 8, wherein the secondary cassette comprises a thermal cassette, a vision enhancement cassette, an acoustic cassette, or a combination thereof.

11. A method of forming a curtainwall unit comprising: providing a unit frame at an offsite facility;providing a in-fill cassette comprising a subframe and an interior portion at an offsite facility; andinstalling the in-fill cassette in the unit frame at the offsite facility.

12. The method of forming a curtainwall unit of claim 11, further comprising providing a secondary cassette and installing the secondary cassette in the unit frame at the offsite facility.

13. The method of forming a curtainwall unit of claim 11, wherein providing a unit frame comprises providing a plurality of mullions and assembling the mullions into the unit frame at the offsite facility.

14. The method of forming a curtainwall unit of claim 13, wherein assembling the mullions into a unit frame comprises joining padding between mullions and trimming excess padding.