US3904111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature responsive flow regulating laminated conduit
Assignee: Volvo Penta AB
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Filing: 1973-05-15
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Granted: 1975-09-09
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Expires: 1993-05-15
Abstract
Abstract A conduit such as a hose, a pipe or the like is disclosed, intended for transport of combustible media. The conduit comprises at least two layers, namely an inner layer at least partially made up of temperature responsive expandable polymer material and a more resistant outer layer surrounding said inner layer; the polymer material at a certain predetermined temperature expands, thereby blocking the flow channel of the conduit.
Inventors
- 👤 Lars Henry Petersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:32
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0186; F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/125; F16L11/127; F16L2011/047; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/7722; Y10T137/7737
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
A conduit for the transport of combustible material, comprising inner and outer layers, said inner layer comprising a temperature-responsive expansible polymeric material containing a blowing agent causing expansion upon heating to a predetermined temperature thereby to block the flow channel of the conduit, said outer layer comprising pressure and temperature-resistant material and surrounding said inner layer to direct the expansion of said inner layer radially inwardly.
Claim 2
Dependent Claim
66 words
A conduit for the transport of combustible material, comprising inner and outer layers, said inner layer comprising a temperature-responsive expansible polymeric material containing a blowing agent causing expansion upon heating to a predetermined temperature thereby to block the flow channel of the conduit, said outer layer comprising pressure and temperature-resistant material and surrounding said inner layer to direct the expansion of said inner layer radially inwardly.
Claim 3
Dependent Claim
89 words
A conduit for the transport of combustible material, comprising inner and outer layers, said inner layer comprising two materials separated by an interposed material, said interposed material melting at a predetermined high temperature to cause said two materials to come into contact with each other and to react chemically with each other and to expand upon reaction thereby to block the flow channel of the conduit, said outer layer comprising pressure and temperature-resistant material and surrounding said inner layer to direct the expansion of said inner layer radially inwardly.
Claim 4
Dependent Claim
89 words
A conduit for the transport of combustible material, comprising inner and outer layers, said inner layer comprising two materials separated by an interposed material, said interposed material melting at a predetermined high temperature to cause said two materials to come into contact with each other and to react chemically with each other and to expand upon reaction thereby to block the flow channel of the conduit, said outer layer comprising pressure and temperature-resistant material and surrounding said inner layer to direct the expansion of said inner layer radially inwardly.
References Cited (Backward Citations)
US2308342A
Cited
US2319498A
Cited
US2383733A
Cited
US2429688A
Cited
US2682336A
Cited
US2792180A
Cited
US3322345A
Cited
US3550640A
Cited
US3712342A
Cited
US3688982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |