US3797530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hose pipes
Assignee: Dunlop Holdings Ltd
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Filing: 1971-04-12
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Granted: 1974-03-19
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Expires: 1991-04-12
Abstract
Abstract A flexible hosepipe for carrying slurry or solid particles provided with a lining comprising a first layer of hard, abrasion and cut-resistant rubber and a second cushioning layer of soft rubber behind the first layer. The hosepipe may be self floating and each length may have end fittings connected during the assembly of the hose, of which the following is a specification.
Inventors
- 👤 J Ambrose
- 👤 E Shephard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:53
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/133; F16L57/00; F16L57/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A flexible hosepipe for carrying abrasive-type particulate material under pressure, comprising a first inner lining layer of hard, abrasion-resistant elastomeric material and a second layer disposed radially outwardly of the first layer, said second layer being of relatively soft resilient elastomeric material whereby the second layer cushions impacts on the first layer.
Claim 2
Dependent Claim
52 words
A flexible hosepipe for carrying abrasive-type particulate material under pressure, comprising a first inner lining layer of hard, abrasion-resistant elastomeric material and a second layer disposed radially outwardly of the first layer, said second layer being of relatively soft resilient elastomeric material whereby the second layer cushions impacts on the first layer.
Claim 3
Dependent Claim
20 words
A flexible hosepipe according to claim 1 wherein a fabric breaker layer is provided within the first inner lining layer.
Claim 4
Dependent Claim
20 words
A flexible hosepipe according to claim 1 wherein a fabric breaker layer is provided between the first and second layers.
Claim 5
Dependent Claim
39 words
A flexible hosepipe according to claim 1 including a plurality of spaced-apart rings of cured resinous material containing reinforcement filaments, rings of elastomeric filler material disposed between the spaced-apart rings, an outer breaker ply and an outer covering layer.
Claim 6
Dependent Claim
22 words
A flexible hosepipe according to claim 4 wherein the elastomeric filler material is a cellular material to provide buoyancy for the hosepipe.
Claim 7
Dependent Claim
26 words
A flexible hosepipe as in claim 1 wherein at least one layer of cellular material is provided over spaced-apart rings to provide buoyancy for the hosepipe.
Claim 8
Dependent Claim
20 words
The flexible hosepipe of claim 1 in which the first inner lining layer has a hardness of about 75* Shore.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |