US4265166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant membrane for chimney liner
Assignee: Pullman Inc
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Filing: 1979-09-10
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Granted: 1981-05-05
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Expires: 1999-09-10
Abstract
Abstract A carbon steel (or other type) chimney liner is provided with an inner membrane of relatively light gauge steel which is highly resistant to corrosion and which is constructed to accommodate thermal expansion in any direction independent of the structure to which it is attached. The membrane and chimney liner include an annular space therebetween which is placed under a vacuum.
Inventors
- 👤 John A. Parker
- 👤 Sid Handler
- 👤 Randolph W. Snook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:40
CPC Classifications
F; F23; F23J; F23J13/00; F23J13/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
63 words
A chimney having in combination; a tubular outer vertically extending liner, an inner tubular membrane shell substantially vertically coextensive with said liner and being radially spaced therefrom to provide and an annular enclosed space therebetween, means supporting said inner membrane from said outer liner, and means connected to said liner communicating with said space to provide a minus atmospheric pressure within said space.
Claim 2
Dependent Claim
63 words
A chimney having in combination; a tubular outer vertically extending liner, an inner tubular membrane shell substantially vertically coextensive with said liner and being radially spaced therefrom to provide and an annular enclosed space therebetween, means supporting said inner membrane from said outer liner, and means connected to said liner communicating with said space to provide a minus atmospheric pressure within said space.
Claim 3
Dependent Claim
19 words
The invention in accordance with claim 1, said inner membrane including a plurality of vertically spaced circumferentially extending corrugatioins.
Claim 4
Dependent Claim
30 words
The invention in accordance with claim 2, said outer liner having a flat floor, and said inner membrane having a second floor including corrugation means supported on said first floor.
Claim 5
Dependent Claim
21 words
The invention in accordance with claim 1, said supporting means including vertical hanger straps connected to said liner and inner membrane.
Claim 6
Dependent Claim
26 words
The invention in accordance with claim 4, said straps having their upper ends connected to said liner and their lower ends connected to said inner membrane.
Claim 7
Dependent Claim
24 words
The invention in accordance with claim 4, said inner membrane comprising a plurality of individual tubular sections connected together at their vertically spaced ends.
Claim 8
Dependent Claim
35 words
The invention in accordance with claim 6, said hanger straps having their upper ends connected to said liner and their lower ends connected to said inner membrane at the connected ends of said tubular sections.
Claim 9
Dependent Claim
115 words
A chimney liner having a combination; a tubular outer vertically extending liner, an inner tubular member substantially vertically coextensive with said outer liner and being radially spaced therefrom to provide an annular enclosed vertical space therebetween, means supporting said inner tubular member from said liner including a plurality of straps circumferentially spaced within said liner, a flue entrance duct comprising an outer tubular duct and an inner tubular flue membrane disposed therein in spaced relation to providean enclosed horizontal space, said outer duct and inner flue membrane extending horizontally outwardly from said chimney with said vertical space communicating with said horizontal space, and means communicating with said spaces to provide a minus atmospheric pressure therein.
Claim 10
Dependent Claim
115 words
A chimney liner having a combination; a tubular outer vertically extending liner, an inner tubular member substantially vertically coextensive with said outer liner and being radially spaced therefrom to provide an annular enclosed vertical space therebetween, means supporting said inner tubular member from said liner including a plurality of straps circumferentially spaced within said liner, a flue entrance duct comprising an outer tubular duct and an inner tubular flue membrane disposed therein in spaced relation to providean enclosed horizontal space, said outer duct and inner flue membrane extending horizontally outwardly from said chimney with said vertical space communicating with said horizontal space, and means communicating with said spaces to provide a minus atmospheric pressure therein.
Claim 11
Dependent Claim
31 words
The invention in accordance with claim 8, said inner tubular member comprising a plurality of individual tubular sections stacked one on top of the other and having adjacent ends connected together.
Claim 12
Dependent Claim
26 words
The invention in accordance with claim 9, said hanger strap lower ends being connected to said inner tubular member at the connection of said adjacent ends.
Claim 13
Dependent Claim
17 words
The invention in accordance with claim 10, said inner tubular member having vertically spaced circumferentially extending corrugations.
Claim 14
Dependent Claim
20 words
The invention in accordance with claim 11, said corrugations being spaced to accommodate thermal expansion between levels of hanger straps.
Claim 15
Dependent Claim
28 words
The invention in accordance with claim 11, said inner tubular liner including a floor having corrugated means, and said liner having a second floor supporting said first floor.
Claim 16
Dependent Claim
15 words
The invention in accordance with claim 8, said inner flue membrane including vertically spaced corrugations.
Claim 17
Dependent Claim
27 words
The invention in accordance with claim 14, said inner flue membrane comprising a plurality of rectangular sections positioned in stacked relation and having adjacent edges connected together.
Claim 18
Dependent Claim
11 words
The invention in accordance with claim 15, said edges extending diagonally.
Claim 19
Dependent Claim
27 words
The invention in accordance with claim 1, including strap means connected to said outer tubular duct and to said inner flue membrane adjacent to said connected edges.
Claim 20
Dependent Claim
18 words
The invention in accordance with claim 8, said outer duct being in communication with said tubular outer liner.
Claim 21
Dependent Claim
21 words
The invention in accordance with claim 8, said tubular outer liner including capping places providing access to said annular enclosed space.
Claim 22
Dependent Claim
17 words
The invention in accordance with claim 8, said means communicating with said spaces being a vacuum pump.
Claim 23
Dependent Claim
26 words
The invention in accordance with claim 20, said vacuum pump cooperating with a monitor or signal means to indicate a leak in the inner tubular member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |