US3826240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct contact water heater
Assignee: Dowa KK
•
Filing: 1973-02-23
•
Granted: 1974-07-30
•
Expires: 1993-02-23
Abstract
Abstract A water heater comprising a body and a lattice-like partition plate dividing the interior of the body into an upper heat absorbing chamber and a lower combustion chamber, burner means being provided in said combustion chamber so that the flow of combustion product is directed upwardly from the combustion chamber through the heat absorbing chamber, cold water being supplied into said heat absorbing chamber and passed downwardly as a counterflow to and in direct contact with said flow of combustion product. A plurality of heat absorbing members are disposed in said heat absorbing chamber and the cold water is supplied onto the heat absorbing members.
Inventors
- 👤 K Miyahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:56
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/107; B; B01; B01J; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30207; B01J2219/30211; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
184 words
A water heater comprising a main body, a heat absorbing chamber provided in the upper region of said main body, a combustion chamber provided in an intermediate portion of said main body below said upper region, a water jacket surrounding said combustion chamber, a hot water collecting vessel mounted in the lower region of said main body below said combustion chamber, means for discharging hot water connected to said hot water vessel, a plurality of relatively flat oval heat absorbing members mounted in said heat absorbing chamber and heated by combustion products from said combustion chamber, said heat absorbing members having a plurality of heat radiating projections integrally formed thereon, burner means mounted adjacent said combustion chamber so as to eject a burning flame into said combustion chamber, and a water inlet providing water supply onto said heat absorbing members such that said water passes down over said heat absorbing members and falls through said combustion chamber and into said hot water collecting vessel or said water passing into said water jacket and overflows therefrom into said combustion chamber to said water collecting vessel.
Claim 2
Dependent Claim
184 words
A water heater comprising a main body, a heat absorbing chamber provided in the upper region of said main body, a combustion chamber provided in an intermediate portion of said main body below said upper region, a water jacket surrounding said combustion chamber, a hot water collecting vessel mounted in the lower region of said main body below said combustion chamber, means for discharging hot water connected to said hot water vessel, a plurality of relatively flat oval heat absorbing members mounted in said heat absorbing chamber and heated by combustion products from said combustion chamber, said heat absorbing members having a plurality of heat radiating projections integrally formed thereon, burner means mounted adjacent said combustion chamber so as to eject a burning flame into said combustion chamber, and a water inlet providing water supply onto said heat absorbing members such that said water passes down over said heat absorbing members and falls through said combustion chamber and into said hot water collecting vessel or said water passing into said water jacket and overflows therefrom into said combustion chamber to said water collecting vessel.
Claim 3
Dependent Claim
15 words
A water heater according to claim 1, in which said heat absorbing members are hollow.
Claim 4
Dependent Claim
35 words
A water heater according to claim 1, in which said burner means is a plurality of burners provided around said combustion chamber and being capable of vaporizing the liquid fuel and burning the vapourized fuel.
Claim 5
Dependent Claim
59 words
A water heater according to claim 3 wherein said burner means includes a shaft rotatably supported, a motor driving said shaft, an atomizing cylinder mounted on said shaft, a liquid fuel supply line supplying fuel onto said atomizing cylinder so as to break the fuel into small particles such that it will be completely converted in said combustion chamber.
References Cited (Backward Citations)
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US2618258A
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Cited
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |