Patent US3757745A successfully refreshed from Google Patents.
US3757745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct fired heating device
Assignee: GENERAL CCOMBUSTION Corp
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Filing: 1972-05-05
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Granted: 1973-09-11
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Expires: 1992-05-05
Abstract
Abstract A direct fired heating device consists of a tank for containing the material to be heated and a pair of spaced elongated heat exchangers disposed in said tank with portions extending outwardly of one end of said tank. Each of said heat exchangers includes elongated tubular baffles disposed therein and one of said heat exchangers is placed in communication with a source of combustion the products of which are directed into the tubular baffle therein. The other of the heat exchangers has the tubular baffle therein in communication with the other heat exchanger so that the products of combustion are recirculated in a tortuous path through both heat exchangers and subsequently vented to the atmosphere.
Inventors
- 👤 J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:21
CPC Classifications
F; F22; F22B; F22B7/00; F22B7/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
A direct fired heating device for incorporation in a tank in which material is to be heated and consisting of a pair of elongated heat exchangers positioned in said tank in spaced relation to one another, one end of one of said elongated heat exchangers extending outwardly of said tank and means for introducing the products of combustion into said outwardly extending end, an elongated tubular baffle disposed in each of said elongated heat exchangers and spaced with respect thereto said elongated tubular baffle in the elongated heat exchanger into which the products of combustion are introduced being open at both ends and arranged to receive said products of combustion, means establishing communication between said elongated heat exchanger into which said products of combustion are delivered and the Elongated tubular baffle in the other of said elongated heat exchangers and vent means in communication with said other of said elongated heat exchangers so that the products of combustion introduced into the direct fired heating device may be vented to the atmosphere therethrough.
Claim 2
Dependent Claim
172 words
A direct fired heating device for incorporation in a tank in which material is to be heated and consisting of a pair of elongated heat exchangers positioned in said tank in spaced relation to one another, one end of one of said elongated heat exchangers extending outwardly of said tank and means for introducing the products of combustion into said outwardly extending end, an elongated tubular baffle disposed in each of said elongated heat exchangers and spaced with respect thereto said elongated tubular baffle in the elongated heat exchanger into which the products of combustion are introduced being open at both ends and arranged to receive said products of combustion, means establishing communication between said elongated heat exchanger into which said products of combustion are delivered and the Elongated tubular baffle in the other of said elongated heat exchangers and vent means in communication with said other of said elongated heat exchangers so that the products of combustion introduced into the direct fired heating device may be vented to the atmosphere therethrough.
Claim 3
Dependent Claim
35 words
The direct fired heating device set forth in claim 1 and wherein each of the elongated tubular baffles are of diameters at least half that of the elongated heat exchangers in which they are positioned.
Claim 4
Dependent Claim
26 words
The direct fired heating device set forth in claim 1 and wherein each of said elongated tubular baffles are positioned axially in said elongated heat exchangers.
Claim 5
Dependent Claim
52 words
The direct fired heating device set forth in claim 1 and wherein said elongated heat exchangers are positioned in parallel arrangement and the ends thereof opposite with respect to the source of combustion are arcuate in cross section and spaced with respect to the ends of the elongated tubular baffles positioned therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |