US5053059A
Expired / Lapsed
US
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Air-intake system for residential furnaces
Assignee: DuPont Canada Inc
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Filing: 1990-06-13
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Granted: 1991-10-01
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Expires: 2010-06-13
Abstract
Abstract An air intake system for a residential combustion furnace is disclosed. The air intake system comprises a membrane formed from an amorphous polymer of perfluoro-2,2-dimethyl-1,3-dioxole, the membrane exhibiting an oxygen/nitrogen selectivity of at least 1.4:1. The permeate section of the membrane is adapted to be in fluid flow communication with a combustion zone of the residential combustion furnace. The membrane preferably has an oxygen flux in excess of 100 Barrers, especially in excess of 500 Barrers. The air intake system provides oxygen-enriched air for the furnace, to make the furnace more efficient.
Inventors
- 👤 Stuart M. Nemser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:31
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D63/00; B01D63/02; F; F02; F02M; F02M25/00; F02M25/10; F02M25/12; F23; F23L; F23L7/00; F23L7/007; Y; Y02; Y02E; Y02E20/00; Y02E20/34; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
112 words
A process for the operation of a residential combustion furnace having a combustion zone and an air intake system for the combustion zone comprising feeding air to a feed side of an oxygen enrichment membrane in the air intake system in a manner that causes an oxygen enriched portion of the air to permeate the membrane to a permeate side of the membrane and then feeding the oxygen enriched air from the permeate side to the combustion zone of the residential combustion furnace, the oxygen enrichment membrane comprising a film or coating of an amorphous polymer of perfluoro-2,2-dimethyl-1,3-dioxole on a porous support, the membrane exhibiting an oxygen/nitrogen selectivity of at least 1.4:1.
Claim 2
Dependent Claim
112 words
A process for the operation of a residential combustion furnace having a combustion zone and an air intake system for the combustion zone comprising feeding air to a feed side of an oxygen enrichment membrane in the air intake system in a manner that causes an oxygen enriched portion of the air to permeate the membrane to a permeate side of the membrane and then feeding the oxygen enriched air from the permeate side to the combustion zone of the residential combustion furnace, the oxygen enrichment membrane comprising a film or coating of an amorphous polymer of perfluoro-2,2-dimethyl-1,3-dioxole on a porous support, the membrane exhibiting an oxygen/nitrogen selectivity of at least 1.4:1.
Claim 3
Dependent Claim
18 words
The process of claim 1 in which the membrane has an oxygen flux in excess of 100 Barrers.
Claim 4
Dependent Claim
19 words
The process of claim 1 in which the membrane is in the form of a plurality of hollow fibres.
Claim 5
Dependent Claim
13 words
The process of claim 3 in which the permeate section is under vacuum.
Claim 6
Dependent Claim
19 words
The process of claim 4 in which the air intake system is connected to the interior of the fibres.
Claim 7
Dependent Claim
19 words
The process of claim 4 in which the air intake system is connected to the exterior of the fibres.
Claim 8
Dependent Claim
41 words
An air intake system for a residential combustion furnace, said air intake system comprising a membrane comprising a film or coating of an amorphous polymer of perfluoro-2,2-dimethyl-1,3-dioxole on a porous support, the membrane exhibiting an oxygen/nitrogen selectivity of at least 1.4:1.
Claim 9
Dependent Claim
41 words
An air intake system for a residential combustion furnace, said air intake system comprising a membrane comprising a film or coating of an amorphous polymer of perfluoro-2,2-dimethyl-1,3-dioxole on a porous support, the membrane exhibiting an oxygen/nitrogen selectivity of at least 1.4:1.
Claim 10
Dependent Claim
40 words
The air intake system of claim 7 in which the membrane has an air feed section and a permeate section, said permeate section being adapted to be in fluid flow communication with a combustion zone of the residential combustion furnace.
Claim 11
Dependent Claim
20 words
The air intake system of claim 8 in which the membrane has an oxygen flux in excess of 100 Barrers.
Claim 12
Dependent Claim
19 words
The air intake system of claim 9 in which the selectivity of oxygen over nitrogen is at least 1.7:1.
Claim 13
Dependent Claim
20 words
The air intake system of claim 8 in which the membrane has an oxygen flux in excess of 500 Barrers.
Claim 14
Dependent Claim
21 words
The air intake system of claim 7 in which the membrane is in the form of a plurality of hollow fibres.
Claim 15
Dependent Claim
21 words
The air intake system of claim 12 in which the air intake system is connected to the interior of the fibres.
Claim 16
Dependent Claim
21 words
The air intake system of claim 12 in which the air intake system is connected to the exterior of the fibres.
Claim 17
Dependent Claim
20 words
The air intake system of claim 7 in which the membrane is in the form of a film or coating.
Claim 18
Dependent Claim
75 words
A residential combustion furnace comprising a combustion zone and an air intake system for the combustion zone the air intake system comprising an oxygen enrichment membrane comprising a film or coating of an amorphous polymer of perfluoro-2,2-dimethyl-1,3-dioxole on a porous support, the membrane exhibiting an oxygen/nitrogen selectivity of at least 1.4:1, said membrane having an air feed section and a permeate section with the permeate section being in fluid flow communication with the combustion zone.
Claim 19
Dependent Claim
75 words
A residential combustion furnace comprising a combustion zone and an air intake system for the combustion zone the air intake system comprising an oxygen enrichment membrane comprising a film or coating of an amorphous polymer of perfluoro-2,2-dimethyl-1,3-dioxole on a porous support, the membrane exhibiting an oxygen/nitrogen selectivity of at least 1.4:1, said membrane having an air feed section and a permeate section with the permeate section being in fluid flow communication with the combustion zone.
Claim 20
Dependent Claim
20 words
The residential combustion furnace of claim 16 in which the membrane has an oxygen flux in excess of 100 Barrers.
Claim 21
Dependent Claim
19 words
The residential combustion furnace of claim 17 in which the selectivity of oxygen over nitrogen is at least 1.7:1.
Claim 22
Dependent Claim
20 words
The residential combustion furnace of claim 16 in which the membrane has an oxygen flux in excess of 500 Barrers.
Claim 23
Dependent Claim
21 words
The residential combustion furnace of claim 16 in which the membrane is in the form of a plurality of hollow fibres.
Claim 24
Dependent Claim
21 words
The residential combustion furnace of claim 20 in which the air intake system is connected to the interior of the fibres.
Claim 25
Dependent Claim
21 words
The residential combustion furnace of claim 20 in which the air intake system is connected to the exterior of the fibres.
Claim 26
Dependent Claim
20 words
The residential combustion furnace of claim 16 in which the membrane is in the form of a film or coating.
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |