Patent US4737861A successfully refreshed from Google Patents.
US4061815A
Expired / Lapsed
US
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Novel compositions
Assignee: Pharmacia and Upjohn Co
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Filing: 1967-10-26
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Granted: 1977-12-06
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Expires: 1987-10-26
Abstract
Abstract Laminated sheet material, having high impact resistance suitable for use in constructional applications requiring high strength and resistance to deformation particularly for military usage such as armor plate, is obtained by sandwiching one or more layers of polyurethane, cellular or non-cellular, between a rigid, high impact resistant sheet of material (especially aluminum armor plate and fiberglass) in the one face and a thin retaining skin on the other. Optionally, a filler (ceramic, particulate refractory, or strip metal) is embedded in the polyurethane layer(s). Said laminates have significantly lower weight than hitherto known materials and additionally are more easily fabricated and shaped.
Inventors
- 👤 Robert E. J. Poole, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:43
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/095; B32B27/00; B32B27/12; B32B27/06; B32B27/065; B32B27/18; B32B27/20; B32B27/40; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; B32B2262/00; B32B2262/10; B32B2262/101; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2307/00; B32B2307/50; B32B2307/536; B32B2307/558; B32B2307/70; B32B2307/72; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2571/00; B32B2571/02; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31598; Y10T428/31605; Y10T428/31609
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
171 words
A laminated sheet characterized by high impact resistance which comprises, in combination, a multiplicity of layers of sheet material, each layer being bonded to the next adjacent layer at the common interface thereof; the outermost layer of material on the one side being selected from the class consisting of metal sheet and fiberglass reinforced resin having a thickness from about 0.50 to about 1.5 inches; the outermost layer of material on the other side being a retaining skin having a thickness within the range of about 0.125 to about 0.25 inches; the said outermost layers of material having sandwiched therebetween at least one layer having a thickness within the range of about 1.0 to about 4.0 inches fabricated from an elastomeric non-cellular polyurethane having a hardness from about 95 Shore A to about 60 Shore D; the overall thickness of said laminated sheet being within the range of about 2.0 to about 5.0 inches and the weight of said laminated sheet being not greater than about 35 pounds per square foot.
Claim 2
Dependent Claim
171 words
A laminated sheet characterized by high impact resistance which comprises, in combination, a multiplicity of layers of sheet material, each layer being bonded to the next adjacent layer at the common interface thereof; the outermost layer of material on the one side being selected from the class consisting of metal sheet and fiberglass reinforced resin having a thickness from about 0.50 to about 1.5 inches; the outermost layer of material on the other side being a retaining skin having a thickness within the range of about 0.125 to about 0.25 inches; the said outermost layers of material having sandwiched therebetween at least one layer having a thickness within the range of about 1.0 to about 4.0 inches fabricated from an elastomeric non-cellular polyurethane having a hardness from about 95 Shore A to about 60 Shore D; the overall thickness of said laminated sheet being within the range of about 2.0 to about 5.0 inches and the weight of said laminated sheet being not greater than about 35 pounds per square foot.
Claim 3
Dependent Claim
19 words
A laminated sheet according to claim 1 wherein the inner layer of polyurethane elastomer has embedded therein a filler.
Claim 4
Dependent Claim
14 words
A laminated sheet according to claim 2 wherein the filler is particulate ceramic material.
Claim 5
Dependent Claim
26 words
A laminated sheet according to claim 2 wherein the filler comprises particulate fused alumina having an average cross-sectional dimension from about 0.375 to about 0.5 inches.
Claim 6
Dependent Claim
12 words
A laminated sheet according to claim 2 wherein the filler is metallic.
Claim 7
Dependent Claim
17 words
A laminated sheet according to claim 5 wherein the filler is composed of corrugated spring steel strips.
Claim 8
Dependent Claim
18 words
A laminated sheet according to claim 1 wherein the thicker of the outer layers is aluminum armor plate.
Claim 9
Dependent Claim
20 words
A laminated sheet according to claim 1 wherein each of the two outermost layers is fabricated from fiberglass reinforced resin.
Claim 10
Dependent Claim
222 words
A laminated sheet characterized by high impact resistance which comprises, in combination, a multiplicity of sheet material each layer being bonded to the next adjacent layer at the common interface thereof; the outermost layer of material on the one side being a fiberglass reinforced resin sheet having a thickness within the range of about 0.50 to about 1.5 inches; the outermost layer of material on the other side of said laminated sheet being a retaining skin having a thickness within the range of about 0.125 to about 0.25 inches; the inner layers of material in said laminate comprising a layer of rigid polymer foam bonded directly to the thickest of the outermost layers and a layer of polyurethane elastomer bonded to the other outermost skin layer of said laminate; said layer of rigid polymer foam having a density of about 2 psi to about 40 psi and a thickness of about 0.5 to about 5.0 inches; said layer of polyurethane elastomer having a thickness within the range of about 1.0 to about 4.0 inches and a hardness from about 90 Shore A to about 65 Shore D; the overall thickness of said laminated sheet being within the range of about 2.0 to about 5.0 inches and the weight of said laminated sheet being not greater than about 35 pounds per square foot.
Claim 11
Dependent Claim
222 words
A laminated sheet characterized by high impact resistance which comprises, in combination, a multiplicity of sheet material each layer being bonded to the next adjacent layer at the common interface thereof; the outermost layer of material on the one side being a fiberglass reinforced resin sheet having a thickness within the range of about 0.50 to about 1.5 inches; the outermost layer of material on the other side of said laminated sheet being a retaining skin having a thickness within the range of about 0.125 to about 0.25 inches; the inner layers of material in said laminate comprising a layer of rigid polymer foam bonded directly to the thickest of the outermost layers and a layer of polyurethane elastomer bonded to the other outermost skin layer of said laminate; said layer of rigid polymer foam having a density of about 2 psi to about 40 psi and a thickness of about 0.5 to about 5.0 inches; said layer of polyurethane elastomer having a thickness within the range of about 1.0 to about 4.0 inches and a hardness from about 90 Shore A to about 65 Shore D; the overall thickness of said laminated sheet being within the range of about 2.0 to about 5.0 inches and the weight of said laminated sheet being not greater than about 35 pounds per square foot.
Claim 12
Dependent Claim
16 words
A laminated sheet according to claim 9 wherein the polymer foam is a rigid polyurethane foam.
Claim 13
Dependent Claim
29 words
A laminated sheet according to claim 9 wherein a layer of fiberglass reinforced resin is interposed between said layer of rigid polymer foam and said layer of polyurethane elastomer.
Claim 14
Dependent Claim
16 words
A laminated sheet according to claim 9 wherein said polyurethane elastomer has embedded therein a filler.
Claim 15
Dependent Claim
14 words
A laminated sheet according to claim 12 wherein the filler is particulate ceramic material.
Claim 16
Dependent Claim
26 words
A laminated sheet according to claim 12 wherein the filler comprises particulate fused alumina having an average cross-sectional dimension from about 0.375 to about 0.5 inches.
Claim 17
Dependent Claim
12 words
A laminated sheet according to claim 12 wherein the filler is metallic.
Claim 18
Dependent Claim
17 words
A laminated sheet according to claim 15 wherein the filler is composed of corrugated spring steel strips.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |