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US4860851A
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Dimensionally-recoverable damping article
Assignee: Tyco International Ltd Bermuda
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Filing: 1987-01-27
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Granted: 1989-08-29
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Expires: 2007-01-27
Abstract
Abstract Acoustic damping is provided by a dimensionally-recoverable article, either in single layer or constrained-layer form. The single layer, or the damping layer of a constrained-layer article, comprises a mixture of a damping component (generally having a high tangent delta value) and a hold-out component (generally having a significant crystallinity).
Inventors
- 👤 David H. Krevor
- 👤 Paul Martens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:48
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168; B; B29; B29C; B29C61/00; B29C61/003; F; F16; F16L; F16L55/00; F16L55/02; F16L55/033; F16L55/0335; F16L9/00; F16L9/21
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
131 words
An article for acoustic damping of a substrate, comprising (i) a damping first layer comprising a material that (a) alone exhibits viscoelastic damping, having a tangent delta value of at least 0.2 at a temperature between -10° C. and 300° C. and at a frequency between 5 and 100,000 Hz; and (ii) a constraining layer that is laminated to a substantial portion of a major surface of said first layer and that comprises a material that is dimensionally-recoverable having a recovery of at least 10%; the first and second layers together having a tangent delta value of at least 0.1 at a temperature between -10° C. and 300° C. and at a frequency between 5 and 100,000 Hz; and being capable of exhibiting constrained layer damping when installed on the substrate.
Claim 2
Dependent Claim
131 words
An article for acoustic damping of a substrate, comprising (i) a damping first layer comprising a material that (a) alone exhibits viscoelastic damping, having a tangent delta value of at least 0.2 at a temperature between -10° C. and 300° C. and at a frequency between 5 and 100,000 Hz; and (ii) a constraining layer that is laminated to a substantial portion of a major surface of said first layer and that comprises a material that is dimensionally-recoverable having a recovery of at least 10%; the first and second layers together having a tangent delta value of at least 0.1 at a temperature between -10° C. and 300° C. and at a frequency between 5 and 100,000 Hz; and being capable of exhibiting constrained layer damping when installed on the substrate.
Claim 3
Dependent Claim
10 words
An article according to claim 1 in wrap-around sleeve form.
Claim 4
Dependent Claim
14 words
An article according to claim 1, in the form of a hollow moulded part.
Claim 5
Dependent Claim
16 words
An article according to claim 1, in which the constraining layer comprises a thermoplastic polymeric material.
Claim 6
Dependent Claim
9 words
An article according to claim 1 in tape form.
Claim 7
Dependent Claim
9 words
A article according to claim 1 in sheet form.
Claim 8
Dependent Claim
139 words
A multi-layer damping device comprising at least two articles acoustically coupled together, each of said articles comprising: (i) a damping first layer comprising a material that (a) alone exhibits viscoelastic damping, having a tangent delta value of at least 0.2 at a temperature between -10° C. and 300° C. and at a frequency between 5 and 100,000 Hz; and (ii) a constraining layer that is laminated to a substantial portion of a major surface of said first layer and that comprises a material that is dimensionally-recoverable having a recovery of at least 10%; the first and second layers together having a tangent delta value of at least 0.1 at a temperature between -10° C. and 300° C. and at a frequency between 5 and 100,000 Hz; and being capable of exhibiting constrained layer damping when installed on the substrate.
Claim 9
Dependent Claim
139 words
A multi-layer damping device comprising at least two articles acoustically coupled together, each of said articles comprising: (i) a damping first layer comprising a material that (a) alone exhibits viscoelastic damping, having a tangent delta value of at least 0.2 at a temperature between -10° C. and 300° C. and at a frequency between 5 and 100,000 Hz; and (ii) a constraining layer that is laminated to a substantial portion of a major surface of said first layer and that comprises a material that is dimensionally-recoverable having a recovery of at least 10%; the first and second layers together having a tangent delta value of at least 0.1 at a temperature between -10° C. and 300° C. and at a frequency between 5 and 100,000 Hz; and being capable of exhibiting constrained layer damping when installed on the substrate.
Claim 10
Independent Claim
95 words
A method of providing acoustic dampling of a substrate comprising the steps of: (i) positioning an article adjacent a surface of the substrate subject to acoustic vibration, said article comprising a layer of a material that (a) is heat-shrinkable, having a recovery of at least 10%; and (b) exhibits viscoelastic damping, having a tangent delta value greater than 0.5 at a temperature between -10° C. and 300° C., and at a frequency between 5 and 100,000 Hz; and (ii) heating said article to cause the article to shrink to achieve acoustic coupling with said surface.
Claim 11
Independent Claim
95 words
A method of providing acoustic dampling of a substrate comprising the steps of: (i) positioning an article adjacent a surface of the substrate subject to acoustic vibration, said article comprising a layer of a material that (a) is heat-shrinkable, having a recovery of at least 10%; and (b) exhibits viscoelastic damping, having a tangent delta value greater than 0.5 at a temperature between -10° C. and 300° C., and at a frequency between 5 and 100,000 Hz; and (ii) heating said article to cause the article to shrink to achieve acoustic coupling with said surface.
Claim 12
Dependent Claim
30 words
A method according to claim 8 in which the step of positioning the article comprises wrapping the article around the surface, and securing the article in a wrapped around configuration.
Claim 13
Independent Claim
152 words
A method of providing acoustic damping of a substrate comprising the steps of: (i) positioning an article adjacent a surface of the substrate subject to acoustic vibration, said article comprising a layer of a material that (a) is heat-shrinkable having a recovery of at least 10%; (b) exhibits viscoelastic damping, having a tangent delta value greater than 0.5 at a temperature between -10° C. and 300° C., and at a frequency between 5 and 100,000 Hz; and (c) comprises a blend of (I) an elastomeric material capable of exhibiting visco-elastic damping; and (II) a hold-out component that is polymeric and at least partially crystalline and being capable of holding the material in a stretch condition; wherein the material is present in an amount of at least 60% of a total weight of the material; and (ii) heating said article to cause the article to shrink to achieve acoustic coupling with said surface.
Claim 14
Independent Claim
152 words
A method of providing acoustic damping of a substrate comprising the steps of: (i) positioning an article adjacent a surface of the substrate subject to acoustic vibration, said article comprising a layer of a material that (a) is heat-shrinkable having a recovery of at least 10%; (b) exhibits viscoelastic damping, having a tangent delta value greater than 0.5 at a temperature between -10° C. and 300° C., and at a frequency between 5 and 100,000 Hz; and (c) comprises a blend of (I) an elastomeric material capable of exhibiting visco-elastic damping; and (II) a hold-out component that is polymeric and at least partially crystalline and being capable of holding the material in a stretch condition; wherein the material is present in an amount of at least 60% of a total weight of the material; and (ii) heating said article to cause the article to shrink to achieve acoustic coupling with said surface.
Claim 15
Dependent Claim
30 words
A method according to claim 10 in which the step of positioning the article comprises wrapping the article around the surface, and securing the article in a wrapped around configuration.
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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) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |