US3847693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Buoyant hose and method for making same
Assignee: Industrie Pirelli SpA
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Filing: 1973-07-24
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Granted: 1974-11-12
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Expires: 1993-07-24
Abstract
Abstract The invention relates to a buoyant flexible hose and method for making same wherein buoyancy is imparted to the hose by an annular sleeve which surrounds said hose and is constituted by an inner layer consisting of a series of axially successive preformed annular bodies of cellular high polymer which are surrounded by an outer layer of a wear resistant polymeric material with the interposition of an intermediate layer of a reinforcing fabric between said inner and outer layers. The outer layer is formed in situ and together with the intermediate layer constitutes a unitary body structure, which is continuous and uninterrupted in the entire extent along said axially successive annular bodies.
Inventors
- 👤 P Ghersa
- 👤 F Torghele
- 👤 C Laberinti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:32
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/1285; B29C70/00; B29C70/04; B29C70/06; B29C70/10; F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/133
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
A METHOD FOR APPLYING A BUOYANT SLEEVE AROUND A HOSE MEMBER SO AS TO RENDER SAID MEMBER BUOYANT IN WATER, COMPRISING: A. FITTING A PLURALITY OF PREFABRICATED ANNULAR BODIES OF CELLULAR HIGH POLYMER MATERIAL AROUND A HOSE MEMBER, WITH SAID BODIES BEING ARRANGED IN AXIAL SUCCESSION, THEIR RADIAL END SURFACES ABUTTING EACH OTHER AND THEIR INNER ANNULAR SURFACES IN CONTACT WITH THE OUTER SURFACES OF SAID HOSE MEMBER, SAID BODIES BEING FREE OF THE SURFACE SKIN WHICH IS COMMON TO CELLULAR HIGH POLYMER MATERIAL, B. APPLYING AN ADHESIVE AGENT TO SAID END SURFACES AND TO SAID ANNULAR INNER SURFACES TO THEREBY, RESPECTIVELY, ADHESIVELY JOIN SAID BODIES TOGETHER AND ANCHOR SAME TO SAID HOSE MEMBER, C. APPLYING A REINFORCING SHEER FABRIC AROUND SAID BODIES,
Claim 2
Independent Claim
123 words
A METHOD FOR APPLYING A BUOYANT SLEEVE AROUND A HOSE MEMBER SO AS TO RENDER SAID MEMBER BUOYANT IN WATER, COMPRISING: A. FITTING A PLURALITY OF PREFABRICATED ANNULAR BODIES OF CELLULAR HIGH POLYMER MATERIAL AROUND A HOSE MEMBER, WITH SAID BODIES BEING ARRANGED IN AXIAL SUCCESSION, THEIR RADIAL END SURFACES ABUTTING EACH OTHER AND THEIR INNER ANNULAR SURFACES IN CONTACT WITH THE OUTER SURFACES OF SAID HOSE MEMBER, SAID BODIES BEING FREE OF THE SURFACE SKIN WHICH IS COMMON TO CELLULAR HIGH POLYMER MATERIAL, B. APPLYING AN ADHESIVE AGENT TO SAID END SURFACES AND TO SAID ANNULAR INNER SURFACES TO THEREBY, RESPECTIVELY, ADHESIVELY JOIN SAID BODIES TOGETHER AND ANCHOR SAME TO SAID HOSE MEMBER, C. APPLYING A REINFORCING SHEER FABRIC AROUND SAID BODIES,
Claim 3
Dependent Claim
30 words
The method of claim 1, wherein said sheer fabric is applied in the form of a tape which is helically wound along the entire outer surface of said annular bodies.
Claim 4
Dependent Claim
21 words
The method of claim 2, wherein said tape is wound in respective opposite directions to form two superposed layers of tape.
Claim 5
Dependent Claim
38 words
The method of claim 1, wherein said fabric is applied after a first thin layer of said polyurethane forming mixture has been applied over said bodies and subsequently the remainder of said mixture is applied around said fabric.
References Cited (Backward Citations)
US3119415A
Cited
US3650299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |