US4685090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular article
Assignee: Raychem Corp
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Filing: 1985-11-27
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Granted: 1987-08-04
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Expires: 2005-11-27
Abstract
Abstract The invention relates to novel laminate tubular articles comprising an outer layer having a modulus of at least about 10 7 Pascals, an interior layer comprising a polymeric material having a loss tangent of at least about 0.5 at a temperature of from about 0° C. to about 40° C. at a frequency of from 10-4,000 Hz and whose modulus is less than the modulus of the outer layer and an innermost layer having a modulus greater than the modulus of said interior layer. The invention further relates to a device for sensing in a body of water, said device comprising at least one sensor surrounded by the novel laminate tubular articles of the invention. The mechanical and acoustic properties of the article make it particularly appropriate for use as the hose in a towed-array sonar system.
Inventors
- 👤 David H. Krevor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:34
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/20; G01V1/201
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
140 words
A tubular article comprising: (a) an outer layer comprising a polymeric material having a Young's modulus of at least about 10 7 Pascals; (b) an interior layer comprising a polymeric material having a loss tangent of at least about 0.5 at a temperature of from about 0° C. to about 40° C. and at a frequency of from 10-4,000 Hz and a Young's modulus less than the Young's modulus of the material of the outer layer; and (c) an inner layer having a Young's modulus from 10 7 to 10 10 Pascals, said modulus being greater than the Young's modulus of said interior layer; said layers being joined together to form a laminated tubular structure in which the interior layer is constrained due to its lamination to the inner and outer layers such that the article exhibits constrained layer damping.
Claim 2
Dependent Claim
140 words
A tubular article comprising: (a) an outer layer comprising a polymeric material having a Young's modulus of at least about 10 7 Pascals; (b) an interior layer comprising a polymeric material having a loss tangent of at least about 0.5 at a temperature of from about 0° C. to about 40° C. and at a frequency of from 10-4,000 Hz and a Young's modulus less than the Young's modulus of the material of the outer layer; and (c) an inner layer having a Young's modulus from 10 7 to 10 10 Pascals, said modulus being greater than the Young's modulus of said interior layer; said layers being joined together to form a laminated tubular structure in which the interior layer is constrained due to its lamination to the inner and outer layers such that the article exhibits constrained layer damping.
Claim 3
Dependent Claim
44 words
A tubular article according to claim 1, wherein the polymeric material of the interior layer has a loss tangent of at least about 1.0 in at least 1 point in the temperature range of 0° to 40° C. and frequency range of 10-4,000 Hz.
Claim 4
Dependent Claim
28 words
A tubular article according to claim 1, wherein the polymeric material of the outer layer has a Young's modulus of between about 10 7 and 10 10 Pascal.
Claim 5
Dependent Claim
11 words
A tubular article according to claim 1, which is dimensionally recoverable.
Claim 6
Dependent Claim
54 words
A tubular article according to claim 1, wherein the inner and outer layer each comprises a material selected from the group consisting of a low density polyethylene, high density polyethylene, ethylene vinyl acetate, a blend of ethylene/ethyl acrylate copolymer and ethylene/vinyl acetate/methacrylic acid terpolymer the inner and outer layers being the same or different.
Claim 7
Dependent Claim
48 words
A tubular article according to claim 1, wherein the interior layer comprises a material selected from the group consisting of a blend of ethylene/vinyl acetate copolymer and nitrile rubber, ethylene/vinyl acetate copolymer, nitrile rubber, a blend of ethylene/vinyl acetate copolymer and ethylene/vinyl acetate/methacrylic acid terpolymer, and EPDM rubber.
Claim 8
Dependent Claim
14 words
A tubular article according to claim 1, whereby interlayer adhesion is enhanced by cross-linking.
Claim 9
Dependent Claim
25 words
A tubular article according to claim 1, wherein interlayer adhesion is enhanced by inclusion in one or more of the layers of a crosslinking promotor.
Claim 10
Independent Claim
160 words
A device for use as an acoustic module in a towed array sonar system comprising at least one hydrophone surrounded by a tubular article comprising: (a) an outer layer comprising a polymeric material having a Young's modulus of at least about 10 7 Pascals; (b) an interior layer comprising a polymeric material having a loss tangent of at least about 0.5 at a temperature of from about 0° C. to about 40° C. and at a frequency of from 10-4,000 Hz and a Young's modulus less than the modulus of the material of the outer layer; and (c) an inner layer having a modulus of from 10 7 to 10 10 Pascals, said Young's modulus being greater than the modulus of said interior layer said layers being joined together to form a laminated tubular structure in which the interior layer is constrained due to its lamination to the inner and outer layers such that the article exhibits constrained layer damping.
Claim 11
Independent Claim
160 words
A device for use as an acoustic module in a towed array sonar system comprising at least one hydrophone surrounded by a tubular article comprising: (a) an outer layer comprising a polymeric material having a Young's modulus of at least about 10 7 Pascals; (b) an interior layer comprising a polymeric material having a loss tangent of at least about 0.5 at a temperature of from about 0° C. to about 40° C. and at a frequency of from 10-4,000 Hz and a Young's modulus less than the modulus of the material of the outer layer; and (c) an inner layer having a modulus of from 10 7 to 10 10 Pascals, said Young's modulus being greater than the modulus of said interior layer said layers being joined together to form a laminated tubular structure in which the interior layer is constrained due to its lamination to the inner and outer layers such that the article exhibits constrained layer damping.
Claim 12
Dependent Claim
43 words
A device according to claim 9, wherein the polymeric material of the interior layer has a loss tangent of at least about 1.0 in at least 1 point in the temperature range of 0° to 40° C. and frequency range of 10-4,000 Hz.
Claim 13
Dependent Claim
27 words
A device according to claim 9, wherein the polymeric material of the outer layer has a Young's modulus of between about 10 7 and 10 10 Pascal.
Claim 14
Dependent Claim
18 words
A device according to claim 9, which comprises an additional innermost interior layer and an additional inner layer.
Claim 15
Dependent Claim
52 words
A device according to claim 9, wherein the inner and outer layer each comprises a material selected from the group consisting of low density polyethylene, high density polyethylene, ethylene vinyl acetate, a blend of ethylene/ethyl acrylate copolymer and ethylene/vinyl acetate/methacrylic acid terpolymer the inner and outer layers being the same or different.
Claim 16
Dependent Claim
47 words
A device according to claim 9, wherein the interior layer comprises a material selected from the group consisting of a blend of ethylene/vinyl acetate copolymer and nitrile rubber, ethylene/vinyl acetate copolymer, nitrile rubber, a blend of ethylene/vinyl acetate copolymer and ethylene/vinyl acetate/methacrylic acid terpolymer, and EPDM rubber.
Claim 17
Dependent Claim
17 words
A device according to claim 9, wherein the tubular laminate was dimensionally recovered around the sensing device.
Claim 18
Dependent Claim
17 words
A device according to claim 9, whereby interlayer adhesion of the tubular laminate is enhanced by cross-linking.
Claim 19
Dependent Claim
28 words
A device according to claim 9, wherein interlayer adhesion of the tubular laminate is enhanced by inclusion in one or more of the layers of a crosslinking promotor.
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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) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |