US3821050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible hose
Assignee: DUNLAP CO Ltd
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Filing: 1972-07-18
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Granted: 1974-06-28
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Expires: 1992-07-18
Abstract
Abstract A process for manufacturing flexible hose in which spaced-apart reinforcement rings are fitted to the hose. The rings are of resinous material and contain reinforcement filaments. The resinous material may be applied in an uncured condition and may be applied into channel-section rings which act as moulds for the reinforcement rings, the resinous material being subsequently cured during vulcanisation of the hose assembly, of which the following is a specification.
Inventors
- 👤 J Ambrose
- 👤 E Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
F; F16; F16L; F16L33/00; F16L33/01; F16L11/00; F16L11/04; F16L11/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T156/1033
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
A process as in claim 1 wherein the curing of the resinous material is carried out by heat applied to vulcanise the hose assembly.
Claim 2
Dependent Claim
47 words
A process as in claim 1 wherein the resinous material incorporates a catalYst which only acts at temperatures above the region of 100* C so that curing of the resinous material occurs solely when the temperature of the assembly is raised for vulcanisation of the hose assembly.
Claim 3
Dependent Claim
40 words
A process as in claim 3 wherein the resinous material contains magnesium oxide to assist handleability of the material and the catalyst is tertiary butyl cumyl peroxide so that curing occurs only at temperatures above the region of 100* C.
Claim 4
Dependent Claim
38 words
A process as in claim 1 wherein the channel-section ring is assembled around the reinforcing material from sections and the assembly is maintained by temporary fastening means until the resinous material is forced into the channel section rings.
Claim 5
Dependent Claim
53 words
A process as in claim 1 wherein the resinous material is pre-treated by shaping means to curve the reinforcement filaments and set them at a curvature substantially equal to the curvature of the reinforcement rings in the hose so that the filaments are not buckled when in circumferential positions in the reinforcement rings.
Claim 6
Dependent Claim
185 words
A process for manufacturing reinforced flexible hose comprising: positioning two end fittings each with nipple portions having spaced ring portions on their outer periphery on a mandrel, one at either end, applying a first inner layer of elastomeric material to the mandrel, applying at least one further inner layer of elastomeric material overlapping the said nipple portions, spaced from the first layer by a fabric breaker layer, applying a layer of textile or wire cord reinforcement fabric, a layer of filler of uncured elastomeric material, binding the layers onto the nipple portion of the end fittings by means of a winding of wire over the layers and between the nipple ring portions, fitting channel-section rings over the assembled layers in spaced-apart relationship along the length of the hose, forming resinous material including reinforcement fibres into the channel space around the rings, applying one or more breaker layers of fabric material over the rings, filling the gaps between the rings with elastomeric filler, applying elastomeric material and fabric outer covering layers to the assembly and heating to vulcanise the elastomeric material and cure the resinous material.
Claim 7
Dependent Claim
31 words
A process as in claim 7 wherein the space between the rings is filled by buoyant material and further layers of the buoyant material are applied before the outer covering layers.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |