US3279775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooler for rotary kiln
Assignee: Allis Chalmers Corp
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Filing: 1964-11-25
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Granted: 1966-10-18
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Expires: 1984-11-25
Abstract
No abstract record available.
Inventors
- 👤 Alexander J Roubal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:22
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/38; F27B7/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
IN A ROTARY KILN ASSEMBLY HAVING A PLURALITY OF COOLING TUBES ATTACHED IN PARALLEL ALIGNMENT AROUND THE PERIPHERY OF THE MATERIAL DISCHARGE END OF THE KILN AND HAVING OBLIQUE MEANS DEFINING A PASSAGE BETWEEN EACH TUBE AND THE INTERIOR OF THE KILN FOR CONDUCTING HOT MATERIAL FROM THE KILN TO THE TUBE AND AIR FROM THE TUBE TO THE KLIN, WALL STRUCTURE WITHIN SAID PASSAGE DEFINING AN ENCLOSED DUCT THAT OPENS ON ONE END TO THE INTERIOR OF SAID KILN AND WITH THE ENCLOSED DUCT EXTENDING THROUGH SAID OBLIQUE MEANS INTO SAID TUBE AND MORE THAN ONE COMPLETE SPIRAL TURN AROUND THE INTERNAL SURFACE OF SAID TUBE WHERE SAID DUCT DEFINES A SECOND OPENING WITHIN SAID TUBE, SAID WALL STRUCTURE DEFINING SAID DUCT INCLUDING A PAIR OF WALL MEMBERS PROJECTING RADIALLY INWARD OF SAID ENCLOSED DUCT TO DEFINE AN OPEN SPIRAL TROUGH TO RECEIVE OBJECTS THAT HAVE PASSED THROUGH THE OBLIQUE PASSAGE AROUND SAID DUCT AND TRANSPORT SUCH OBJECTS THROUGH THE TUBE AND AWAY FROM THE OBLIQUE PASSAGE.
Claim 2
Dependent Claim
168 words
IN A ROTARY KILN ASSEMBLY HAVING A PLURALITY OF COOLING TUBES ATTACHED IN PARALLEL ALIGNMENT AROUND THE PERIPHERY OF THE MATERIAL DISCHARGE END OF THE KILN AND HAVING OBLIQUE MEANS DEFINING A PASSAGE BETWEEN EACH TUBE AND THE INTERIOR OF THE KILN FOR CONDUCTING HOT MATERIAL FROM THE KILN TO THE TUBE AND AIR FROM THE TUBE TO THE KLIN, WALL STRUCTURE WITHIN SAID PASSAGE DEFINING AN ENCLOSED DUCT THAT OPENS ON ONE END TO THE INTERIOR OF SAID KILN AND WITH THE ENCLOSED DUCT EXTENDING THROUGH SAID OBLIQUE MEANS INTO SAID TUBE AND MORE THAN ONE COMPLETE SPIRAL TURN AROUND THE INTERNAL SURFACE OF SAID TUBE WHERE SAID DUCT DEFINES A SECOND OPENING WITHIN SAID TUBE, SAID WALL STRUCTURE DEFINING SAID DUCT INCLUDING A PAIR OF WALL MEMBERS PROJECTING RADIALLY INWARD OF SAID ENCLOSED DUCT TO DEFINE AN OPEN SPIRAL TROUGH TO RECEIVE OBJECTS THAT HAVE PASSED THROUGH THE OBLIQUE PASSAGE AROUND SAID DUCT AND TRANSPORT SUCH OBJECTS THROUGH THE TUBE AND AWAY FROM THE OBLIQUE PASSAGE.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |