US3669079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heater
Assignee: OMEGA ENERGY SYSTEMS Inc
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Filing: 1970-08-06
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Granted: 1972-06-13
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Expires: 1990-08-06
Abstract
Abstract Water heaters having a combustion chamber with a water jacket and having flue tubes extended from the combustion chamber with surrounding water tubes, the water tubes being connected with the water jacket and the circulation being arranged to provide for passage of the water through the water tubes surrounding the flue tubes and through the water jacket in counterflow relation to the flow of products of combustion through the combustion chamber and through the flue tubes.
Inventors
- 👤 Robert B Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:55
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/12; F24H1/22; F24H1/24; F24H1/26; F23; F23D; F23D2206/00; F23D2206/0094
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
195 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into one end of the combustion chamber, a flue tube for discharging products of combustion from the other end of the combustion chamber, a water jacket surrounding the combustion chamber and having an inlet in a region remote from the fuel and air inlet and having an outlet in a region adjacent to the fuel and air inlet, a liner in the combustion chamber spaced from the chamber wall to provide a dead air space between the water jacket and the interior of the combustion chamber where the fuel and air is burned, and a water tube surrounding the flue tube and providing an annular water flow passage surrounding the flue tube, the water tube having a water inlet at its end remote from the combustion chamber and being connected with the water inlet to the water jacket surrounding the combustion chamber and thereby provide for counterflow of combustion products through the combustion chamber and flue tube in relation to the flow of water through the annular passage surrounding the flue tube and through the water jacket surrounding the combustion chamber.
Claim 2
Dependent Claim
195 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into one end of the combustion chamber, a flue tube for discharging products of combustion from the other end of the combustion chamber, a water jacket surrounding the combustion chamber and having an inlet in a region remote from the fuel and air inlet and having an outlet in a region adjacent to the fuel and air inlet, a liner in the combustion chamber spaced from the chamber wall to provide a dead air space between the water jacket and the interior of the combustion chamber where the fuel and air is burned, and a water tube surrounding the flue tube and providing an annular water flow passage surrounding the flue tube, the water tube having a water inlet at its end remote from the combustion chamber and being connected with the water inlet to the water jacket surrounding the combustion chamber and thereby provide for counterflow of combustion products through the combustion chamber and flue tube in relation to the flow of water through the annular passage surrounding the flue tube and through the water jacket surrounding the combustion chamber.
Claim 3
Dependent Claim
31 words
A water heater as defined in claim 1 and further including a compressor for introducing the fuel and air under compression through the fuel and air inlet into the combustion chamber.
Claim 4
Dependent Claim
35 words
A water heater as defined in claim 1 and further including a blower in the discharge from the flue tube providing for drawing of the fuel and air through the inlet into the combustion chamber.
Claim 5
Dependent Claim
49 words
A water heater as defined in claim 1 in which the fuel and air inlet means comprises a fuel jet, a venturi passage through which the fuel jet delivers fuel into the combustion chamber, and an inlet for combustion air communicating with the inlet end of the venturi passage.
Claim 6
Dependent Claim
177 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into one end of the combustion chamber, a flue tube for discharging products of combustion from the other end of the combustion chamber, a water jacket surrounding the combustion chamber and having an inlet in a region remote from the fuel and air inlet and having an outlet in a region adjacent to the fuel and air inlet, a water tube surrounding the flue tube and providing an annular water flow passage surrounding the flue tube, the water tube having a water inlet at its end remote from the combustion chamber and being connected with the water inlet to the water jacket surrounding the combustion chamber and thereby provide for counterflow of combustion products through the combustion chamber and flue tube in relation to the flow of water through the annular passage surrounding the flue tube and through the water jacket, and pump means for establishing combustion under pressure and forced circulation of combustion products from the combustion chamber through the flue tube.
Claim 7
Dependent Claim
177 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into one end of the combustion chamber, a flue tube for discharging products of combustion from the other end of the combustion chamber, a water jacket surrounding the combustion chamber and having an inlet in a region remote from the fuel and air inlet and having an outlet in a region adjacent to the fuel and air inlet, a water tube surrounding the flue tube and providing an annular water flow passage surrounding the flue tube, the water tube having a water inlet at its end remote from the combustion chamber and being connected with the water inlet to the water jacket surrounding the combustion chamber and thereby provide for counterflow of combustion products through the combustion chamber and flue tube in relation to the flow of water through the annular passage surrounding the flue tube and through the water jacket, and pump means for establishing combustion under pressure and forced circulation of combustion products from the combustion chamber through the flue tube.
Claim 8
Dependent Claim
125 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into the combustion chamber, a plurality of flue tubes for discharging products of combustion from the combustion chamber, a common chamber into which the flue tubes discharge, a blower having its inlet connected with said common chamber providing for drawing of the combustion products through the flue tubes, a water tube surrounding each flue tube and providing an annular water flow passage surrounding the flue tube, and an inlet header for feeding water into the water tubes at the ends thereof remote from the combustion chamber and thereby provide for counterflow of the water through the annular flow passage in relation to the flow of combustion products through the flue tubes.
Claim 9
Dependent Claim
125 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into the combustion chamber, a plurality of flue tubes for discharging products of combustion from the combustion chamber, a common chamber into which the flue tubes discharge, a blower having its inlet connected with said common chamber providing for drawing of the combustion products through the flue tubes, a water tube surrounding each flue tube and providing an annular water flow passage surrounding the flue tube, and an inlet header for feeding water into the water tubes at the ends thereof remote from the combustion chamber and thereby provide for counterflow of the water through the annular flow passage in relation to the flow of combustion products through the flue tubes.
Claim 10
Dependent Claim
159 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into the bottom of the combustion chamber, a flue tube extended upwardly from the combustion chamber for discharging products of combustion from the top of the combustion chamber, a water jacket surrounding the combustion chamber and having an inlet in the region of the top of the combustion chamber and having an outlet in the region of the bottom of the combustion chamber, and a water tube surrounding the flue tube and providing an annular water flow passage surrounding the flue tube, the water tube having a water inlet at its upper end and being connected with the water inlet to the water jacket surrounding the combustion chamber and thereby provide for upward counterflow of combustion products through the combustion chamber and flue tube in relation to the downward flow of water through the annular passage surrounding the flue tube and through the water jacket.
Claim 11
Dependent Claim
159 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into the bottom of the combustion chamber, a flue tube extended upwardly from the combustion chamber for discharging products of combustion from the top of the combustion chamber, a water jacket surrounding the combustion chamber and having an inlet in the region of the top of the combustion chamber and having an outlet in the region of the bottom of the combustion chamber, and a water tube surrounding the flue tube and providing an annular water flow passage surrounding the flue tube, the water tube having a water inlet at its upper end and being connected with the water inlet to the water jacket surrounding the combustion chamber and thereby provide for upward counterflow of combustion products through the combustion chamber and flue tube in relation to the downward flow of water through the annular passage surrounding the flue tube and through the water jacket.
Claim 12
Dependent Claim
40 words
A water heater as defined in claim 7 and further including a blower connected with the upper end of the flue tube providing for drawing of the fuel and air through the inlet into the bottom of the combustion chamber.
Claim 13
Dependent Claim
50 words
A water heater as defined in claim 7 in which a plurality of flue tubes and surrounding water tubes are provided and further including a common flue tube discharge chamber, and an exhaust blower connected with said common chamber and providing for flow of combustion products through the flue tubes.
Claim 14
Dependent Claim
110 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into the combustion chamber, a tube bundle including a plurality of flue tubes for discharging products of combustion from the combustion chamber and further including a plurality of water tubes surrounding the flue tubes and each providing an annular water flow passage surrounding a flue tube, the tube bundle having flue sheets and tube sheets at each end spaced from each other to provide inlet and outlet water headers, and separable connection means between the tube bundle and the combustion chamber providing for removal and replacement of the tube bundle with respect to the combustion chamber.
Claim 15
Dependent Claim
110 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into the combustion chamber, a tube bundle including a plurality of flue tubes for discharging products of combustion from the combustion chamber and further including a plurality of water tubes surrounding the flue tubes and each providing an annular water flow passage surrounding a flue tube, the tube bundle having flue sheets and tube sheets at each end spaced from each other to provide inlet and outlet water headers, and separable connection means between the tube bundle and the combustion chamber providing for removal and replacement of the tube bundle with respect to the combustion chamber.
Claim 16
Dependent Claim
124 words
A water heater comprising a combustion chamber, a water jacket surrounding the combustion chamber, inlet means for introducing fuel and air into the combustion chamber, a plurality of flue tubes for discharging products of combustion from the combustion chamber, a common chamber into which the flue tubes discharge, a water tube surrounding each flue tube and providing an annular water flow passage surrounding the flue tube, and inlet and outlet headers for feeding water through the water tubes, the water inlet header having water supply means and the water outlet header having connection means for delivering water from the outlet header into the water jacket surrounding the combustion chamber, said connection means being separable to provide for removal and replacement of the water tubes.
Claim 17
Dependent Claim
124 words
A water heater comprising a combustion chamber, a water jacket surrounding the combustion chamber, inlet means for introducing fuel and air into the combustion chamber, a plurality of flue tubes for discharging products of combustion from the combustion chamber, a common chamber into which the flue tubes discharge, a water tube surrounding each flue tube and providing an annular water flow passage surrounding the flue tube, and inlet and outlet headers for feeding water through the water tubes, the water inlet header having water supply means and the water outlet header having connection means for delivering water from the outlet header into the water jacket surrounding the combustion chamber, said connection means being separable to provide for removal and replacement of the water tubes.
Claim 18
Dependent Claim
153 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into the combustion chamber, a flue tube for discharging products of combustion from the combustion chamber, a water jacket surrounding the combustion chamber, and a water tube surrounding the flue tube and providing an annular water flow passage surrounding the flue tube, the water tube having a water inlet at its end remote from the combustion chamber and being connected with the water jacket surrounding the combustion chamber and thereby provide for flow of water serially through the annular passage surrounding the flue tube and through the water jacket, the fuel and air inlet means comprising a pair of spaced plates one having fuel jet nozzles extended therethrough and the other having venturi passages extended therethrough in alignment with the fuel jet nozzles, the space between said plates comprising an air chamber for supplying air to the venturi passages.
Claim 19
Dependent Claim
153 words
A water heater comprising a combustion chamber, inlet means for introducing fuel and air into the combustion chamber, a flue tube for discharging products of combustion from the combustion chamber, a water jacket surrounding the combustion chamber, and a water tube surrounding the flue tube and providing an annular water flow passage surrounding the flue tube, the water tube having a water inlet at its end remote from the combustion chamber and being connected with the water jacket surrounding the combustion chamber and thereby provide for flow of water serially through the annular passage surrounding the flue tube and through the water jacket, the fuel and air inlet means comprising a pair of spaced plates one having fuel jet nozzles extended therethrough and the other having venturi passages extended therethrough in alignment with the fuel jet nozzles, the space between said plates comprising an air chamber for supplying air to the venturi passages.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |