US4205105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe insulation
Assignee: PH Thermal Products Ltd
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Filing: 1977-12-19
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Granted: 1980-05-27
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Expires: 1997-12-19
Abstract
Abstract Pipe insulation is disclosed made up of right cylindrical elements, or washers, held together by a flexible coating and in which the fibres are aligned in planes perpendicular to the cylindrical axis. The elements have central bores to receive pipes to be lagged. The elements have excellent axial compressibility and can therefore be used around bends in pipes without cutting.
Inventors
- 👤 Kenneth Blundell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:23
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/02; F16L59/021; F16L59/022; F16L59/023; F16L59/14; F16L59/16; F16L59/22; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1352; Y10T428/1372; Y10T428/1386; Y10T428/21; Y10T428/218
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
Insulation for lagging pipes which comprises a plurality of right cylindrical elements in the form of washers of fibres, said fibres lying substantially in planes perpendicular to the cylindrical axis of said elements, said elements having a bore therein in which said pipe is to be located, and a tubular surface coating of flexible material adhered to said elements holding said elements, said fibres, and said coating together in a predetermined length.
Claim 2
Dependent Claim
72 words
Insulation for lagging pipes which comprises a plurality of right cylindrical elements in the form of washers of fibres, said fibres lying substantially in planes perpendicular to the cylindrical axis of said elements, said elements having a bore therein in which said pipe is to be located, and a tubular surface coating of flexible material adhered to said elements holding said elements, said fibres, and said coating together in a predetermined length.
Claim 3
Dependent Claim
33 words
Insulation according to claim 1 wherein each element has a radial slit therein which extends into the bore, whereby the elements can be opened out and slipped over a pipe to be lagged.
Claim 4
Dependent Claim
17 words
Insulation according to claim 2 wherein said slit extends into the diametrically opposite side of each element.
Claim 5
Dependent Claim
19 words
Insulation according to claim 1 wherein said surface coating is applied as a liquid by spraying, brushing or dipping.
Claim 6
Dependent Claim
13 words
Insulation according to claim 4 wherein said surface coating is a polyurethane rubber.
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) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |