Patent US3935681A successfully refreshed from Google Patents.
US3935681A
Expired / Lapsed
US
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Fire screen for a structural panel
Assignee: AGC Glass Europe SA
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Filing: 1974-08-07
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Granted: 1976-02-03
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Expires: 1994-08-07
Abstract
Abstract A structural panel comprising one or a plurality of spaced sheet members has a frame around its edge. At least one body of material capable of screening the structural panel against fire is provided in the form of a chemically activated substance. The substance or substances are retained in an inoperative position in the vicinity of the structural panel and are released to an operative position in response to a predetermined rise of temperature wherein a body of material covers substantially one or more faces of the panel.
Inventors
- 👤 Jean-Pierre Voiturier
- 👤 Francis Jacquemin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:42
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10045; B32B17/10055; B32B17/10165; B32B17/10174; B32B17/10293; B32B17/10302; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941; E04B1/942; E04C; E04C2/00; E04C2/54; E06; E06B; E06B5/00; E06B5/10; E06B5/16; E06B5/165
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
107 words
A fire screen for a light transmitting structural panel comprising means for providing at least one body of material capable of screening a structural panel against fire, means for retaining said fire screening means in an inoperative position in the vicinity of the periphery of the structural panel, and means responsive to a rise to a predetermined temperature for releasing said fire screeing means from its inoperative position into an operative position in which at least one fire screening body of material covers substantially the area of the panel, said fire screening means comprising a plurality of substances disposed apart from each other in the inoperative position.
Claim 2
Dependent Claim
107 words
A fire screen for a light transmitting structural panel comprising means for providing at least one body of material capable of screening a structural panel against fire, means for retaining said fire screening means in an inoperative position in the vicinity of the periphery of the structural panel, and means responsive to a rise to a predetermined temperature for releasing said fire screeing means from its inoperative position into an operative position in which at least one fire screening body of material covers substantially the area of the panel, said fire screening means comprising a plurality of substances disposed apart from each other in the inoperative position.
Claim 3
Dependent Claim
31 words
A fire screen as claimed in claim 1 wherein said substances mix together upon release of the fire screening means and react chemically to form said fire screening body of material.
Claim 4
Dependent Claim
30 words
A fire screen as claimed in claim 1 wherein said substances include a foaming agent whereby in the operative position said fire screening body of material will comprise a foam.
Claim 5
Dependent Claim
42 words
A fire screen as claimed in claim 1 wherein one of said substances is a flowable material which when released forms said fire screening body of material, said releasing means yields in response to an increase in temperature to a predetermined value.
Claim 6
Dependent Claim
35 words
A fire screen as claimed in claim 1 wherein one of said substances which when heated will undergo a chemical reaction to generate a pressure to release said fire screening means to its operative position.
Claim 7
Dependent Claim
56 words
A fire screen as claimed in claim 1 wherein one of said substances is responsive to a predetermined pressure to release said fire screening means to form said fire screening body of material, said temperature responsive release means retaining a quantity of gas under pressure and yieldable at a rise in temperature to a predetermined value.
Claim 8
Dependent Claim
19 words
A fire screen as claimed in claim 6 wherein said quantity of gas is retained remote from said panel.
Claim 9
Dependent Claim
53 words
A fire screen as claimed in claim 1 wherein one of said substances is responsive to a predetermined pressure to release said fire screening means to form said fire screening body of material, and means responsive to being heated to a predetermined temperature for generating a gas to release said fire screening means.
Claim 10
Dependent Claim
19 words
A fire screen as claimed in claim 8 wherein said gas generating means is disposed remote from said panel.
Claim 11
Dependent Claim
22 words
A fire screen as claimed in claim 1 wherein said fire screening means is disposed on an upper edge of the panel.
Claim 12
Dependent Claim
20 words
A fire screen as claimed in claim 3 wherein the foam is formed upon release of the fire screening means.
Claim 13
Dependent Claim
27 words
A fire screen as claimed in claim 1 wherein said structural panel is hollow, said fire screening means being released to an operative position within the panel.
Claim 14
Dependent Claim
15 words
A fire screen as claimed in claim 4 wherein said flowable material is a liquid.
Claim 15
Dependent Claim
48 words
A fire screen as claimed in claim 1 wherein said fire screening means comprises a hydrated material containing absorbed water and becomes flowable when heated, said hydrated material is one selected from the group of sodium silicate, silicagel, borax, silica aluminate, a ferrous sulphate or a ferrous carbonate.
Claim 16
Dependent Claim
56 words
A fire screen as claimed in claim 1 wherein said fire screening means comprises a hydrated material containing absorbed water and becomes flowable when heated, the liquid ingredient of the hydrated material will evaporate after the fire screening means has been released to its operative position to leave a substantially solid fire screeing body of material.
Claim 17
Dependent Claim
26 words
A fire screen as claimed in claim 4 wherein said panel is hollow, said fire screening material flowing into and filling the panel upon being released.
Claim 18
Dependent Claim
33 words
A fire screen as claimed in claim 1 and comprising a frame enclosing said panel, means within said frame for defining a chamber therein, said fire screening means being contained in said chamber.
Claim 19
Dependent Claim
30 words
A fire screen as claimed in claim 1 wherein said panel comprises a plurality of spaced sheet members, and resilient spacer means for retaining said sheet members in spaced relation.
Claim 20
Dependent Claim
20 words
A fire screen as claimed in claim 1 wherein said panel comprises at least one sheet of chemicially tempered glass.
Claim 21
Dependent Claim
39 words
A fire screen as claimed in claim 1 wherein said panel comprises at least one laminated sheet, said laminates sheet comprising a plurality of sheets of chemically tempered glass and a layer of plastic therebetween uniting said glass sheets.
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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) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |