US3559692A
Expired / Lapsed
US
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Flexible tubes
Assignee: Moulinex SA
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Filing: 1968-04-11
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Granted: 1971-02-02
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Expires: 1988-04-11
Abstract
Abstract A flexible tube having a wall of wavy section each wave having successive folds opening inwardly and outwardly, the crest of at least one of the folds of each wave having a narrowly concave outline.
Inventors
- 👤 Jean Mantelet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/111; A; A47; A47L; A47L9/00; A47L9/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A flexible tube made wholly of pliable material such as a plastic material, for conveying a fluid such as air, the wall of which in longitudinal section comprises a series of identical waves each having a fold opening toward the inside of the tube followed by a fold opening toward the outside, the apex of at least one of the said folds itself having further narrow central corrugation defined by a protrusion and a groove and opening in the same direction as its respective fold and forming on each of the inside and outside faces of the wall of the tube two inflexion points symmetrically disposed on opposite sides of said apex.
Claim 2
Dependent Claim
112 words
A flexible tube made wholly of pliable material such as a plastic material, for conveying a fluid such as air, the wall of which in longitudinal section comprises a series of identical waves each having a fold opening toward the inside of the tube followed by a fold opening toward the outside, the apex of at least one of the said folds itself having further narrow central corrugation defined by a protrusion and a groove and opening in the same direction as its respective fold and forming on each of the inside and outside faces of the wall of the tube two inflexion points symmetrically disposed on opposite sides of said apex.
Claim 3
Dependent Claim
25 words
A flexible tube according to claim 1, wherein only the fold opening toward the inside of the tube has said narrow corrugation at its apex.
Claim 4
Dependent Claim
30 words
A flexible tube according to claim 2 wherein the fold opening toward the inside is wider in a direction axially of the tube than the fold opening toward the outside.
Claim 5
Dependent Claim
31 words
A flexible tube according to claim 2 wherein the wall thickness is smaller in the fold opening toward the inside of the tube than in the fold opening toward the outside.
Claim 6
Dependent Claim
31 words
A flexible tube according to claim 3 wherein the wall thickness is smaller in the fold opening toward the inside of the tube than in the fold opening toward the outside.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |