US4878480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant tube fired with two bidirectional burners
Assignee: Gas Technology Institute
•
Filing: 1988-07-26
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Granted: 1989-11-07
•
Expires: 2008-07-26
Abstract
Abstract A dual burner bidirectional radiant tube heater is disclosed utilizing single throat eductors for both the supply of combustion air to the burners and for the exhaust of the products of combustion from the burners.
Inventors
- 👤 James E. Watson
- 👤 Theodore E. Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:29
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/002; F23L; F23L15/00; F23L15/02; F23L17/00; F23L17/16; F23L5/00; F23L5/04; F27; F27B; F27B9/00; F27B9/06; F27B9/068; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
181 words
An improvement for a radiant tube heating system having a bi-directional burner at the ends thereof, the bi-directional burners serving as burners for combustion air and discharge openings for products of combustion, the improvement comprising a first eductor, means to connect said first eductor to a first burner, said first eductor having a jet nozzle and a throat, a second eductor, means to connect said second eductor to a second burner, said second eductor having a jet nozzle and a throat, first means to operate the second burner and the jet nozzle of said first eductor pulling combustion air through said throat of said second eductor for firing said second burner while discharging the products of combustion thereof through said first eductor, second means to operate the first burner and the jet nozzle of said second eductor pulling combustion air through said throat of said first eductor for firing said first burner while discharging the products of combustion thereof through said second eductor and means to alternately selectively operate said first means and said second means to heat the radiant tube.
Claim 2
Dependent Claim
181 words
An improvement for a radiant tube heating system having a bi-directional burner at the ends thereof, the bi-directional burners serving as burners for combustion air and discharge openings for products of combustion, the improvement comprising a first eductor, means to connect said first eductor to a first burner, said first eductor having a jet nozzle and a throat, a second eductor, means to connect said second eductor to a second burner, said second eductor having a jet nozzle and a throat, first means to operate the second burner and the jet nozzle of said first eductor pulling combustion air through said throat of said second eductor for firing said second burner while discharging the products of combustion thereof through said first eductor, second means to operate the first burner and the jet nozzle of said second eductor pulling combustion air through said throat of said first eductor for firing said first burner while discharging the products of combustion thereof through said second eductor and means to alternately selectively operate said first means and said second means to heat the radiant tube.
Claim 3
Dependent Claim
26 words
The improved radiant tube burner of claim 1 characterized in that the operation of said eductors provide the only supply of combustion air for said burners.
Claim 4
Dependent Claim
65 words
The improved radiant tube burner of claim 1 wherein the heating system has regenerative beds associated with the bi-directional burners and characterized by a delay within said first and second means between the operation of the eductors and the burners, said delay in the operation of the burners allowing said eductors to purge the regenerative bed of products of combustion before ignition of the burner.
Claim 5
Dependent Claim
17 words
The improved radiant tube heater of claim 3 characterized in that said delay is substantially one second.
Claim 6
Dependent Claim
16 words
The improved radiant tube heater of claim 1 characterized in that the burners are regenerative burners.
Claim 7
Dependent Claim
26 words
The improved radiant tube heater of claim 1 characterized by the addition of two regenerators, said regenerators being located between the burners and the eductor throats.
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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) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |