Patent US4558550A successfully refreshed from Google Patents.
US4558550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating and fluidtight roof covering
Assignee: SMAC SAS
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Filing: 1983-08-29
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Granted: 1985-12-17
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Expires: 2003-08-29
Abstract
Abstract The covering is constructed on the site and adheres to a corrugated support 1 and to spaced-apart projections 2. It comprises a reinforcing element of metal or of a glass cloth 4, 6 having meshes which are small enough to retain a foaming product which is still in the liquid state but sufficiently rigid (for example ribbed) so as to be planar and have great strength. The reinforcing element is embedded in the foaming material in the course of the solidification of the latter and imparts thereto a planar outer surface. Air pockets are formed between the corrugation roots 10 and the solidified and reinforced foaming product. This reinforcing element may include two successive layers, namely a layer 4 having small meshes and a layer 6 having large meshes, the latter providing the desired strength.
Inventors
- 👤 Jean Marchais
- 👤 Michel Netter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:16
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/16; E04D13/1606; E04D13/1668; E04D13/1675; E04D7/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
240 words
An insulating and fluidtight roof covering for constructing on the site, said covering comprising in combination, a support structure defining spaced-apart lines of projecting support surfaces and hollows between said support surfaces, a substantially flat sheet of foam material having a substantially constant thickness, generally sheet-shaped reinforcing and stiffening means having small meshes embedded in the sheet of foam material, said meshes being of such size as to allow passage therethrough of a minor portion of said foam material toward said support surfaces when said foam material is in a prior liquid state for application on said reinforcing means and support surfaces so that, when the foam material is in a set state after application, a major portion of the foam material is retained by said reinforcing means and said minor portion of the foam material adjacent to said support surfaces has extended through and beyond the meshes of the reinforcing means and into direct contact with said support surfaces, said foam material adhering directly to said support surfaces by its own adhesiveness, said major portion and said minor portion of said foam material constitute a single integral piece of said foam material, and said minor portion of the foam material spans the hollows between adjacent ones of said support surfaces and only slightly penetrates said hollows to an extent depending on the thickness of the foam material on a side of the reinforcing means adjacent to said support surfaces.
Claim 2
Dependent Claim
240 words
An insulating and fluidtight roof covering for constructing on the site, said covering comprising in combination, a support structure defining spaced-apart lines of projecting support surfaces and hollows between said support surfaces, a substantially flat sheet of foam material having a substantially constant thickness, generally sheet-shaped reinforcing and stiffening means having small meshes embedded in the sheet of foam material, said meshes being of such size as to allow passage therethrough of a minor portion of said foam material toward said support surfaces when said foam material is in a prior liquid state for application on said reinforcing means and support surfaces so that, when the foam material is in a set state after application, a major portion of the foam material is retained by said reinforcing means and said minor portion of the foam material adjacent to said support surfaces has extended through and beyond the meshes of the reinforcing means and into direct contact with said support surfaces, said foam material adhering directly to said support surfaces by its own adhesiveness, said major portion and said minor portion of said foam material constitute a single integral piece of said foam material, and said minor portion of the foam material spans the hollows between adjacent ones of said support surfaces and only slightly penetrates said hollows to an extent depending on the thickness of the foam material on a side of the reinforcing means adjacent to said support surfaces.
Claim 3
Dependent Claim
30 words
A covering according to claim 1, wherein the reinforcing element comprises meshes which have a size equivalent to the size of square meshes having a substantially 5 mm side dimension.
Claim 4
Dependent Claim
46 words
A covering according to claim 1, wherein the reinforcing means comprise a lower layer having small meshes for retaining the foaming product in the liquid state and an upper layer having larger meshes and sufficient strength to resist the weight of personnel walking over the covering.
Claim 5
Dependent Claim
28 words
A covering according to claim 1, wherein the reinforcing means consist of a single layer having said small meshes and constituting a form bottom and also providing strength.
Claim 6
Dependent Claim
16 words
A covering according to claim 4, wherein said single layer is of a ribbed expanded metal.
Claim 7
Dependent Claim
14 words
A covering according to claim 4, wherein said layer is of a glass cloth.
Claim 8
Dependent Claim
16 words
A covering according to claim 3, wherein the lower layer is formed by a metal net.
Claim 9
Dependent Claim
16 words
A covering according to claim 3, wherein the lower layer is formed by a glass cloth.
Claim 10
Dependent Claim
16 words
A covering according to claim 3, wherein the upper layer is formed by a welded lattice.
Claim 11
Dependent Claim
16 words
A covering according to claim 3, wherein the upper layer is formed by an expanded metal.
Claim 12
Dependent Claim
16 words
A covering according to claim 3, wherein the upper layer is formed by a perforated sheet.
Claim 13
Dependent Claim
15 words
A covering according to claim 3, wherein the upper layer is formed by a netting.
Claim 14
Dependent Claim
15 words
A covering according to claim 3, wherein the upper layer is formed by a grating.
Claim 15
Dependent Claim
16 words
A covering according to claim 3, wherein the upper layer is formed by a plastic net.
Claim 16
Dependent Claim
28 words
A covering according to claim 1, wherein said support structure is formed by corrugated roof sheets, the foam material adhering to corrugation crests which define said support surfaces.
Claim 17
Dependent Claim
26 words
A covering according to claim 1, wherein said support structure is formed by a series of spaced-apart roofing purlins having outer surfaces defining said support surfaces.
Claim 18
Independent Claim
119 words
A method for covering roofing comprising placing a flat and taut reinforcing element having relatively small meshes on a fixed support comprising projections which projections are spaced apart and substantially parallel to each other and define hollows therebetween, and depositing on said reinforcing element a liquid foaming product which almost instantaneously solidifies by adhering to the projections of the support under the effect of its own adhesiveness after having wetted a lower side of the reinforcing element and swelled around the reinforcing element so as to constitute a substantially planar sheet spanning said hollows and only slightly penetrating said hollows, said meshes having such size as to allow passage therethrough of only a minor portion of said foam material.
Claim 19
Independent Claim
119 words
A method for covering roofing comprising placing a flat and taut reinforcing element having relatively small meshes on a fixed support comprising projections which projections are spaced apart and substantially parallel to each other and define hollows therebetween, and depositing on said reinforcing element a liquid foaming product which almost instantaneously solidifies by adhering to the projections of the support under the effect of its own adhesiveness after having wetted a lower side of the reinforcing element and swelled around the reinforcing element so as to constitute a substantially planar sheet spanning said hollows and only slightly penetrating said hollows, said meshes having such size as to allow passage therethrough of only a minor portion of said foam material.
Claim 20
Dependent Claim
23 words
A method according to claim 17, comprising spraying onto the planar sheet of reinforced foam at least one other layer of foaming product.
Claim 21
Dependent Claim
30 words
A covering according to claim 1, wherein said meshes have a size equivalent to the size of square meshes having a side dimension of between 5 mm and 20 mm.
Claim 22
Dependent Claim
53 words
A covering according to claim 3, wherein said small meshes have a size equivalent to the size of square meshes having a side dimension of between 5 mm and 20 mm, and said larger meshes have a size equivalent to the size of square meshes having a side dimension of substantially 10 cm.
Claim 23
Dependent Claim
18 words
A covering according to claim 1, wherein said reinforcing means has a coefficient of transparency of substantially 30%.
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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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |