US3249663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel kiln system
Assignee: Pullman Inc
•
Filing: 1963-07-16
•
Granted: 1966-05-03
•
Expires: 1983-07-16
Abstract
No abstract record available.
Inventors
- 👤 Philip D H Dressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:06
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/24; F27B9/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A RELATIVELY SMALL WARE MASS TUNNEL KILN HAVING DIRECT FIRING BURNERS COMPRISING, IN COMBINATION, MEANS FOR RAPIDLY HEATING SELECTED PORTION OF THE COMBUSTION AIR FED TO SAID BURNERS TO A SELECTED CONSTANT TEMPERATURE, MEANS FOR ADMIXING SAID ANY SELECTED PORTION WITH THE REMAINDER OF SAID COMBUSTION AIR TO PROVIDE HEATED COMBUSTION AIR FOR INTRODUCTION THROUGH SIAD BURNERS AT PREDETERMINED ELEVATED TEMPERATURE, AND MEANS FOR SENSING THE TEMPERATURE IN SAID KILN TO CONTROL THE QUANTITY OF SAID SELECTED PORTION OF COMBUSTION AIR TO BE SO HEATED, WHEREBY A RAPID CHANGE IN THE TEMPERATURRE OF THE FLAMES FROM SAID BURNERS MAY BE OBTAINED IN RESPONSE TO ANY CHANGE IN WEIGHT, SIZE, FILL, OR OTHER VARIABLE, OF SAID LOAD WHICH OTHERWISE WOULD SUBSTANTIALLY ADVERSELY AFFECT SAID TEMPERATURE IN SAID KILN.
Claim 2
Dependent Claim
103 words
IN A METHOD FOR REGULATING A KILN SYSTEM, THE STEPS COMPRISING, IN COMBINATON, PROVIDING BURNERS TO HEAT A KILN TO PRESCRIBED KILN TEMPERATURE, OR PRESCRIBED KILN TEMPERATURES, FEEDING FUEL AND COMBUSTIO AIR IN PREDETERMINED RATIO QUANTITES TO SAID BURNERS TO PROVIDE FLAME OF ONE TEMPERATURE FOR THE PURPOSE OF SUCH HEATING, AND RAPIDLY CHANGING THE TEMPERATURE OF SUCH COMBUSTION AIR BEFORE IT REACHES SAID BURNERS TO CHANGE SUCH FLAME TEMPERATURE WITHOUT LAG IN RESPONSE TO ANY NEW CONDITION REQUIRING SUCH CHANGE EITHE TO KEEP SAID KILN TEMPERATURE CONSTANT IF SO PRESCRIBED, OR TO VARY IT IN ACCORD WITH A DIFFERENT PRESCRIBED KILN TEMPERATURE.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |