US3756764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil gasification burner
Assignee: Vaillant GmbH
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Filing: 1972-05-18
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Granted: 1973-09-04
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Expires: 1992-05-18
Abstract
Abstract In a burner in which oil is gasified by the heat of the incoming air for combustion, that air is heated upon start up by an electric heater and after the burner is running by heat from the products of combustion. Should the combustion air be inadequately heated during operation a lower limit switch actuates controls to energize the electric heater and simultaneously reduce the amount of air supply by a predetermined increment. This action is repetitious until there is sufficient change thereby caused in the oil/air ratio (due to the decreased air flow) to result in the temperature not dropping below the lower temperature limit. Should the combustion air be excessively heated an upper limit switch actuates controls which shut off the flow of oil and simultaneously increase the amount of air supply by a predetermined increment. When the temperature is reduced to within the normal range, the oil supply turns back on. Again, this action is repetitious until there is sufficient change thereby caused in the oil/air ratio (due to the increased air flow) to result in the temperature not exceeding the upper temperature limit.
Inventors
- 👤 H Reichmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:53
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2035; F23; F23N; F23N5/00; F23N5/20; F23N5/206; F24H15/00; F24H15/30; F24H15/305; F24H15/325; F24H15/355; F24H15/36; F24H15/37; F24H15/40; F24H15/414; F24H15/421; F24H15/429; F23N2221/00; F23N2221/08; F23N2225/00; F23N2225/08; F23N2225/14; F23N2227/00; F23N2227/04; F23N2233/00; F23N2233/06; F23N2235/00; F23N2235/26; F23N2235/28; F23N2235/30; F23N2239/00; F23N2239/06; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
In an oil-gasifying burner apparatus having a gasifying chamber into which oil is sprayed, a combustion chamber having ducts for preheating the air for combustion, an air supply device including said ducts, an electric heater and a blower to deliver heated air to said gasifying chamber, oil supply means to spray oil into said gasifying chamber, and control means including a temperature sensor for shutting off the fuel supply when the temperature rises above an upper limit and for turning on said heater wHen the temperature is below a lower limit, the improvement comprising: said air supply device includes valve means for varying amount of air delivered to said gasifying chamber, and motor means connected to said valve means for adjusting the valve means in an opening sense and in a closing sense, said control means being connected to said motor means for, when said burner is operating, moving said valve means in the closing sense when the temperature drops below said lower limit and for moving said valve means in the opening sense when the temperature exceeds the upper limit.
Claim 2
Dependent Claim
181 words
In an oil-gasifying burner apparatus having a gasifying chamber into which oil is sprayed, a combustion chamber having ducts for preheating the air for combustion, an air supply device including said ducts, an electric heater and a blower to deliver heated air to said gasifying chamber, oil supply means to spray oil into said gasifying chamber, and control means including a temperature sensor for shutting off the fuel supply when the temperature rises above an upper limit and for turning on said heater wHen the temperature is below a lower limit, the improvement comprising: said air supply device includes valve means for varying amount of air delivered to said gasifying chamber, and motor means connected to said valve means for adjusting the valve means in an opening sense and in a closing sense, said control means being connected to said motor means for, when said burner is operating, moving said valve means in the closing sense when the temperature drops below said lower limit and for moving said valve means in the opening sense when the temperature exceeds the upper limit.
Claim 3
Dependent Claim
145 words
In an apparatus as set forth in claim 1, wherein said control means includes a sensor means exposed to the temperature in the gasifying chamber, an upper limit switch means connected to said sensor to be actuated thereby, a lower limit switch means connected to said sensor means to be actuated thereby, a timer including a switch and means connecting the switch to the motor means for operating the motor means in one sense or the other for a period of time determined by the setting of the timer, means connecting the lower limit switch means to the timer and to the electric heater for energizing said electric heater and said motor means when the temperature drops below the lower limit after the burner has been running, and means connecting the upper limit switch means to the timer when the temperature exceeds said upper limit.
Claim 4
Dependent Claim
51 words
In an apparatus as set forth in claim 2 including a solenoid control oil valve in said oil supply means, said upper limit switch means being connected to said solenoid control valve to close the valve and thereby shut off the flow of oil when the upper temperature limit is exceeded.
Claim 5
Dependent Claim
56 words
In an apparatus as set forth in claim 3, wherein the means connecting the timer switch and the motor includes a relay having two positions, in one of said positions the motor being connected for operation in one sense and in the other of said positions said motor being connected for operation in the other sense.
Claim 6
Dependent Claim
56 words
In an apparatus as set forth in claim 2, wherein the means connecting the timer switch and the motor includes a relay having two positions, in one of said positions the motor being connected for operation in one sense and in the other of said positions said motor being connected for operation in the other sense.
References Cited (Backward Citations)
US21950A
Cited
US2397986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |