Patent US4449341A successfully refreshed from Google Patents.
US4449341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire containment arrangement for curtain wall construction
Assignee: PPG Industries Inc
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Filing: 1982-04-01
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Granted: 1984-05-22
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Expires: 2002-04-01
Abstract
Abstract In a curtain wall building structure, an improved fire containment arrangement is provided by supporting curtain wall insulation sheets and safing insulation directly to the periphery of the floor slab structure by means of a heat resistant clip.
Inventors
- 👤 Philip C. Taglianetti
- 👤 Andrew M. Burkard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/88
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
In a multi-level building having an elevated floor slab structure and an exterior curtain wall that includes spandrel glazing panels mounted opposite and spaced from the pheriphery of the floor slab structure; a fire containment arrangement comprising: a fire resistant insulation sheet between a spandrel glazing unit and the floor slab structure extending parallel to the spandrel glazing unit and covering substantially the area of the spandrel glazing panel below the level of the floor slab structure, heat resistant means supporting the insulation sheet on the floor slab structure independently from the curtain wall, and a body of fire resistant material filling space between the insulation sheet and the perimeter of the floor slab structure, whereby paths for fire propagation around the periphery of the floor slab structure in the spandrel area are blocked.
Claim 2
Dependent Claim
134 words
In a multi-level building having an elevated floor slab structure and an exterior curtain wall that includes spandrel glazing panels mounted opposite and spaced from the pheriphery of the floor slab structure; a fire containment arrangement comprising: a fire resistant insulation sheet between a spandrel glazing unit and the floor slab structure extending parallel to the spandrel glazing unit and covering substantially the area of the spandrel glazing panel below the level of the floor slab structure, heat resistant means supporting the insulation sheet on the floor slab structure independently from the curtain wall, and a body of fire resistant material filling space between the insulation sheet and the perimeter of the floor slab structure, whereby paths for fire propagation around the periphery of the floor slab structure in the spandrel area are blocked.
Claim 3
Dependent Claim
35 words
The structure of claim 1 wherein the heat resistant means supporting the insulation sheet comprise a clip, a portion of which penetrates the insulation sheet and another portion of which engages the floor slab structure.
Claim 4
Dependent Claim
15 words
The structure of claim 1 wherein the body of fire resistant material comprises compressible insulation.
Claim 5
Dependent Claim
17 words
The structure of claim 2 wherein the body of fire resistant material is supported by the clip.
Claim 6
Dependent Claim
16 words
The structure of claim 1 wherein each insulation sheet is supported by a plurality of clips.
Claim 7
Dependent Claim
32 words
The structure of claim 1 wherein a second insulation sheet is associated with each spandrel glazing panel and covers substantially the area of the spandrel glazing panel above the floor slab structure.
Claim 8
Dependent Claim
32 words
The structure of claim 2 or 4 wherein each clip has a central vertical portion, a horizontal lower portion penetrating the insulation sheet, and an upper portion engaging the floor slab structure.
Claim 9
Dependent Claim
27 words
The structure of claim 7 wherein the floor slab structure includes a vertically upstanding curb member, and the upper portion of each clip engages the curb member.
Claim 10
Dependent Claim
25 words
The structure of claim 7 wherein the upper portion of each clip is horizontal and rests on the upper surface of the floor slab structure.
Claim 11
Dependent Claim
12 words
The structure of claim 7 wherein the clip is made of steel.
Claim 12
Dependent Claim
34 words
The structure of claim 1 wherein there is a space between the insulation sheet and the spandrel glazing panel and spacing is maintained therebetween by a body of insulation material inserted into the space.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |