Patent US4412880A successfully refreshed from Google Patents.
US4412880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing hollow profiled structures, and structures produced thereby
Assignee: Individual
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Filing: 1978-10-18
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Granted: 1983-11-01
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Expires: 1998-10-18
Abstract
Abstract A method of making a hard multi-tubular structure which comprises; producing a flat hose fabric composed of a plurality of side-by-side abutting hoses, introducing uninflated foil tubes into each of the hoses of the fabric, the tubes being of substantially the same length as the length of the fabric, inflating the tubes for expanding the hoses into formed hollow sections, treating the fabric with a hardening material, and allowing a hardening of the hardening material and a setting of the fabric with the hoses in expanded condition. Therefollowing, the tubes are left after the setting of the hose fabric in the respective hollow sections free of any internal inflating pressure. Alternatively, the tubes may be withdrawn from the hollow sections after the setting.
Inventors
- 👤 Erich Wintermantel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:30
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/28; E; E04; E04F; E04F13/00; E04F13/02; E04F13/04; E04F13/07; E04F13/08; E04F13/0885; E04F13/0887; F; F16; F16L; F16L59/00; F16L59/02; F16L59/026; F16L9/00; F16L9/18; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157; Y10T428/24479; Y10T428/24562; Y10T428/24628; Y10T428/24661; Y10T428/24744
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A method of making a hard multi-tubular structure which comprises: producing a flat hose fabric composed of a plurality of side-by-side abutting hoses, introducing uninflated foil tubes into each of the hoses of the fabric, the tubes being of substantially the same length as the length of the fabric, treating the fabric with a hardening material, inflating the tubes for expanding the hoses into formed hollow sections, allowing hardening of the hardening material and setting of the fabric with the hoses in expanded condition, and leaving the tubes after setting of the hose fabric in the respective hollow sections free of any internal inflating pressure, the hose fabric being woven with weft threads and warp threads being in groups with spacings present between adjacent pairs of groups.
Claim 2
Independent Claim
127 words
A method of making a hard multi-tubular structure which comprises: producing a flat hose fabric composed of a plurality of side-by-side abutting hoses, introducing uninflated foil tubes into each of the hoses of the fabric, the tubes being of substantially the same length as the length of the fabric, treating the fabric with a hardening material, inflating the tubes for expanding the hoses into formed hollow sections, allowing hardening of the hardening material and setting of the fabric with the hoses in expanded condition, and leaving the tubes after setting of the hose fabric in the respective hollow sections free of any internal inflating pressure, the hose fabric being woven with weft threads and warp threads being in groups with spacings present between adjacent pairs of groups.
Claim 3
Independent Claim
126 words
A method of making a hard multi-tubular structure which comprises: producing a flat hose fabric composed of a plurality of side-by-side abutting hoses, introducing uninflated foil tubes into each of the hoses of the fabric, the tubes being of substantially the same length as the length of the fabric, treating the fabric with a hardening material, inflating the tubes for expanding the hoses into formed hollow sections, allowing hardening of the hardening material and setting of the fabric with the hoses in expanded condition, and leaving the tubes after setting of the hose fabric in the respective hollow sections free of any internal inflating pressure, the weft threads and warp threads of the hose fabric being interwoven in a displacement-proof manner at their points of intersection.
Claim 4
Independent Claim
126 words
A method of making a hard multi-tubular structure which comprises: producing a flat hose fabric composed of a plurality of side-by-side abutting hoses, introducing uninflated foil tubes into each of the hoses of the fabric, the tubes being of substantially the same length as the length of the fabric, treating the fabric with a hardening material, inflating the tubes for expanding the hoses into formed hollow sections, allowing hardening of the hardening material and setting of the fabric with the hoses in expanded condition, and leaving the tubes after setting of the hose fabric in the respective hollow sections free of any internal inflating pressure, the weft threads and warp threads of the hose fabric being interwoven in a displacement-proof manner at their points of intersection.
References Cited (Backward Citations)
US3565983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |