US4590971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated pipeline
Assignee: Webco Industrial Rubber Ltd
•
Filing: 1983-12-22
•
Granted: 1986-05-27
•
Expires: 2003-12-22
Abstract
Abstract An insulated pipeline having spaced sections of heat-insulating material held between a continuous corrosion-resistant coating on the pipe and an outer protective jacket, thereby to provide a flexible composite which renders the pipeline resistant to mechanical and chemical attack while provided heat insulation for the pipeline in a manner which allows the pipeline to flex, for example during laying. The pipeline is preferably in the form of a continuous protective matrix bonded to the pipe and enveloping individual sections of the heat-insulating material.
Inventors
- 👤 George A. Webster
- 👤 Brian J. Wadie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:59
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/143; Y; Y10; Y10S; Y10S138/00; Y10S138/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
An insulated pipeline having a pipe, a continuous coating of non-foamed resilient water-impermeable corrosion-resistant material around the pipe, heat-insulating material disposed around the corrosion-resistant coating and isolated from the pipe by the corrosion-resistant coating, the heat-insulating material being in sections which are mutually spaced along the pipeline, and a continuous abrasion-resistant jacket of protective non-foamed resilient water-impermeable material disposed around the heat-insulating material for protection against mechanical damage, the corrosion-resistant coating and the protective jacket being bonded together by non-foamed water-impermeable resilient material extending between the sections of heat-insulating material so that the corrosion-resistant coating, the protective jacket and the resilient material together form a continuous non-foamed matrix which encloses and surrounds the sections of heat insulating material thereby to enclose and isolate each section of heat-insulating material from adjacent sections of heat-insulating material.
Claim 2
Dependent Claim
134 words
An insulated pipeline having a pipe, a continuous coating of non-foamed resilient water-impermeable corrosion-resistant material around the pipe, heat-insulating material disposed around the corrosion-resistant coating and isolated from the pipe by the corrosion-resistant coating, the heat-insulating material being in sections which are mutually spaced along the pipeline, and a continuous abrasion-resistant jacket of protective non-foamed resilient water-impermeable material disposed around the heat-insulating material for protection against mechanical damage, the corrosion-resistant coating and the protective jacket being bonded together by non-foamed water-impermeable resilient material extending between the sections of heat-insulating material so that the corrosion-resistant coating, the protective jacket and the resilient material together form a continuous non-foamed matrix which encloses and surrounds the sections of heat insulating material thereby to enclose and isolate each section of heat-insulating material from adjacent sections of heat-insulating material.
Claim 3
Dependent Claim
25 words
An insulated pipeline according to claim 1, wherein the resilient material between the sections of the heat-insulating material is the same as the protective material.
Claim 4
Dependent Claim
19 words
An insulated pipeline according to claim 1, wherein the corrosion-resistant coating is bonded along its length to the pipe.
Claim 5
Dependent Claim
18 words
An insulated pipeline according to claim 1, wherein both the corrosion-resistant material and the protective material are elastomeric.
Claim 6
Dependent Claim
23 words
An insulated pipeline according to claim 1, wherein the corrosion-resistant coating has a thickness in the range from 4 mm to 10 mm.
Claim 7
Dependent Claim
40 words
An insulated pipeline according to claim 1, wherein the sections of the heat-insulating material are each part-cylindrical and the circumference of the pipe is surrounded by a plurality of said sections mutually angularly spaced and separated by said resilient material.
References Cited (Backward Citations)
US2857931A
Cited
US3563825A
Cited
US3728187A
Cited
US3830899A
Cited
US4040165A
Cited
US4241762A
Cited
US4509561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |