US3842820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for supplying thermal energy to one or more places to be heated
Assignee: US Philips Corp
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Filing: 1971-02-08
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Granted: 1974-10-22
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Expires: 1991-02-08
Abstract
Abstract A device for supplying thermal energy to a place to be heated, comprising a combustion chamber constructed from a number of slit-like flow ducts for reacting air-fuel mixture, which ducts immediately adjoin, with their inlet side, the inlets for air of combustion and fuel. The ducts are bounded mainly by parts of a heat-transmitting wall through which thermal energy can be withdrawn from the reacting air-fuel mixture.
Inventors
- 👤 A Michels
- 👤 R Meijer
- 👤 Beukering H Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:05
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; F02G2258/00; F02G2258/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
Apparatus operable with a source of air and fuel to produce thermal energy to be transferred to a medium, comprising a combination combustion and heating chamber including an inlet for said air, and an inlet for said fuel, and an outlet, the chamber having walls which define a plurality of combustion ducts in which said air and fuel are mixed and in which combustion of said mixture and production of said thermal energy occurs, said combustion ducts having width substantially greater than height, with similar secondary ducts defined between each two combustion ducts and with said medium contained in said secondary ducts, and at least one wall of each of said combustion ducts being a boundary wall through which said thermal energy is transferred outward to said medium in the secondary ducts.
Claim 2
Dependent Claim
132 words
Apparatus operable with a source of air and fuel to produce thermal energy to be transferred to a medium, comprising a combination combustion and heating chamber including an inlet for said air, and an inlet for said fuel, and an outlet, the chamber having walls which define a plurality of combustion ducts in which said air and fuel are mixed and in which combustion of said mixture and production of said thermal energy occurs, said combustion ducts having width substantially greater than height, with similar secondary ducts defined between each two combustion ducts and with said medium contained in said secondary ducts, and at least one wall of each of said combustion ducts being a boundary wall through which said thermal energy is transferred outward to said medium in the secondary ducts.
Claim 3
Dependent Claim
121 words
Apparatus according to claim 1 further comprising a second chamber having walls which define a closed space with a first of said walls being one of said boundary walls of said combustion ducts, and a second of said walls being heattransmitting and spaced from said first, and said medium which is a heat-transporting fluid situated within said second chamber, said fluid being cyclically changeable between liquid and vapor physical states, whereby thermal energy is transferred through said first wall and absorbed by the fluid in a liquid state which is changed to its vapor state and moves to said second wall which absorbs thermal energy from the vapor which returns to its liquid state and flows back to said first wall.
Claim 4
Dependent Claim
149 words
Apparatus operable with a source of air and fuel for burning said air and fuel to produce thermal energy comprising, a combination combustion and heating chamber including an inlet for said air and an inlet for said fuel and an outlet, the chamber having walls which define a plurality of combustion ducts which have width substantially greater than height with similar secondary ducts defined between each two combination ducts, and in which said air and fuel are mixed and in which combustion of said mixture and production of said thermal energy occur, at least one wall of each of said combustion ducts being a boundary wall through which said thermal energy is transferrable, the apparatus further comprising means for withdrawing thermal energy from said combustion ducts by transferring said energy through said boundary walls to reduce the temperature of said combustion, and thereby reduce the formation of nitrogen oxides.
Claim 5
Dependent Claim
149 words
Apparatus operable with a source of air and fuel for burning said air and fuel to produce thermal energy comprising, a combination combustion and heating chamber including an inlet for said air and an inlet for said fuel and an outlet, the chamber having walls which define a plurality of combustion ducts which have width substantially greater than height with similar secondary ducts defined between each two combination ducts, and in which said air and fuel are mixed and in which combustion of said mixture and production of said thermal energy occur, at least one wall of each of said combustion ducts being a boundary wall through which said thermal energy is transferrable, the apparatus further comprising means for withdrawing thermal energy from said combustion ducts by transferring said energy through said boundary walls to reduce the temperature of said combustion, and thereby reduce the formation of nitrogen oxides.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |