Patent US3552361A successfully refreshed from Google Patents.
US3552361A
Expired / Lapsed
US
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Central heating boiler
Assignee: UUDENKAUPUNGIN TELAKKA
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Filing: 1969-06-27
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Granted: 1971-01-05
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Expires: 1989-06-27
Abstract
Abstract Central heating boiler for alternatively utilizing a solid fuel, such as wood and a fluid fuel, such as oil having a vertically disposed tube and an obliquely disposed tube intersecting therewith with the obliquely disposed tube being at an angle greater than the gliding angle so as to automatically feed such fuel toward the intersection for burning and provided with means for mounting a fluid fuel burner for projecting a flame downwardly within the oblique tube.
Inventors
- 👤 Pentti Kalervo Helpio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:27
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/24; F24H1/26; F24H1/28; F24H1/287
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
Central heating boiler in which both oil and wood can be employed as fuel, characterized in that the oil burner combustion chamber is arranged in the boiler at an inclination at least corresponding to the gliding angle of wood and that this combustion chamber in its lower portion communicates with a preferably vertical space which is in communication with an outlet for combustion gases and which is arranged, during heating with wood and when the oil burner combustion chamber is functioning as a wood storage to function as a combustion chamber for a low-burning boiler.
Claim 2
Dependent Claim
95 words
Central heating boiler in which both oil and wood can be employed as fuel, characterized in that the oil burner combustion chamber is arranged in the boiler at an inclination at least corresponding to the gliding angle of wood and that this combustion chamber in its lower portion communicates with a preferably vertical space which is in communication with an outlet for combustion gases and which is arranged, during heating with wood and when the oil burner combustion chamber is functioning as a wood storage to function as a combustion chamber for a low-burning boiler.
Claim 3
Dependent Claim
39 words
Central heating boiler according to claim 1, characterized in that the oil burner combustion chamber is made so long that the flame of the oil burner, even at full power, does not touch the bottom of the combustion chamber.
Claim 4
Dependent Claim
43 words
Central heating boiler according to claim 1, characterized in that the convection tubes are provided with screw-formed combustion gas guide means for the control of the draft conditions, which guide means are detachable and the number of which can be increased and decreased.
Claim 5
Dependent Claim
99 words
Central heating furnace comprising, in combination, a pair of intersecting elongated combustion tubes disposed generally angularly relative to one another in a generally vertically disposed plane, one of said pair of combustion tubes extending generally vertically upwardly of the intersection therebetween defining a combustion chamber for burning of solid fuel fed thereinto through the other of said tubes, said other of said tubes being inclined at an angle at least as great as the gliding angle of the fuel so that fuel inserted therein may automatically advance into said one tube as the lower end portions thereof are consumed.
Claim 6
Dependent Claim
99 words
Central heating furnace comprising, in combination, a pair of intersecting elongated combustion tubes disposed generally angularly relative to one another in a generally vertically disposed plane, one of said pair of combustion tubes extending generally vertically upwardly of the intersection therebetween defining a combustion chamber for burning of solid fuel fed thereinto through the other of said tubes, said other of said tubes being inclined at an angle at least as great as the gliding angle of the fuel so that fuel inserted therein may automatically advance into said one tube as the lower end portions thereof are consumed.
Claim 7
Dependent Claim
84 words
Furnace defined in claim 4 further comprising a cover movably mounted with the upper end portion of said other of said tubes so that solid fuel may be inserted therein and means for mounting a fluid fuel burner with the upper end of said other of said tubes for projecting a flame generally axially downwardly within said other tube wherein said other tube is of sufficient length that the peaks of the flame extend past said intersection and into said one of said tubes.
Claim 8
Dependent Claim
77 words
Furnace defined in claim 5 further comprising a grate extending across the lower end portions of said tubes generally beneath said intersection for supporting the burning ends of such solid fuel extending down said other of said tubes and a primary air tube extending generally horizontally outwardly of said intersection at least partially beneath said grate for enabling combustion air to flow into said intersection and for enabling soot, ashes, and combustion residues to be removed therefrom.
Claim 9
Dependent Claim
30 words
Furnace defined in claim 6 further comprising a secondary air valve extending generally horizontally into said one of saId tubes generally opposite said intersection at a location above said grate.
Claim 10
Dependent Claim
16 words
Furnace defined in claim 5 wherein each of said tubes is of generally circular cross-sectional configuration.
Claim 11
Dependent Claim
72 words
Furnace defined in claim 5 wherein said one of said tubes terminates at the upward end thereof substantially at the level of the upper end of said intersection, said furnace further comprising jacket means substantially completely surrounding said tubes for containing a heat transfer fluid to receive the heat of combustion therefrom and at least one convection tube extending upwardly of said one of said tubes for exhausting the combustion gases therefrom.
Claim 12
Dependent Claim
76 words
Furnace defined in claim 9 wherein said convection tube is disposed generally vertically and comprises a plurality of screw-forming combustion-gas guides removably disposed within said convection tubes for rotating and swirling the combustion gases, and further comprising a smoke-collecting chamber extending generally upwardly of said convection tube and a cover for said smoke-collecting chamber movably disposed opposite said convection tubes for enabling access to said smoke collecting chamber, convection tubes and screw forming combustion gas guide.
Claim 13
Dependent Claim
103 words
Furnace defined in claim 10 further comprising a grate extending across the lower end portion of said one and said other of said tubes generally beneath said intersection for supporting solid fuel, a primary air tube extending generally horizontally outwardly of said intersection at least partially beneath said grate for enabling combustion air to flow into the intersection and for enabling soot, ashes and residue to be removed therefrom and a secondary air valve extending generally horizontally into said one of said tubes generally opposite said intersection and above said grate and wherein each of said tubes is of generally circular cross-sectional configuration.
References Cited (Backward Citations)
US2215983A
Cited
US2490127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |