Patent US4399256A successfully refreshed from Google Patents.
Patent US3302938A successfully refreshed from Google Patents.
US3302938A
Expired / Lapsed
US
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Cement production in a rotary kiln
Assignee: BENDY ENGINEERING Co
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Filing: 1965-01-25
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Granted: 1967-02-07
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Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Wilfred R Bendy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:15
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/32; F27B7/3205; F27D; F27D3/00; F27D3/18; F27D3/16; F27D2003/168; F27D2003/169; F27D21/00; F27D21/0014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A METHOD FOR PRODUCING CEMENT COMPRISING FEEDING A MAJOR PORTION OF CEMENT RAW MATERIAL INTO THE UPPER FEED END OF A ROTARY CEMENT KILN, ROTATING SAID KILN, FEEDING FUEL INTO THE LOWER DISCHARGE END OF THE KILN AND BURNING IT TO COUNTERCURRENTLY HEAT THE CEMENT RAW MATERIAL AS IT PROGRESSIVELY MOVES DOWN THE KILN THROUGH A CALCINING ZONE AND THEN A CLINKERING ZONE AND IS THEREAFTER DISCHARGED AT THE LOWER DISCHARGE END OF THE KILN AS FULLY CLINKERED MATERIAL, INJECTING A MINOR PORTION OF CEMENT RAW MATERIAL AS A STREAM INTO THE KILN TO IMPINGE ON THE GENERAL AREA OF THE CLINKERING ZONE, SENSING ANY CHANGE IN THE LOCATION OF SAID CLINKERING ZONE, AND VARYING THE RATE OF FEED OF SAID MINOR PORTION OF CEMENT RAW MATERIAL AS A FUNCTION OF INCIPIENT CHANGES IN THE LOCATION OF THE CLINKERING ZONE TO MAINTAIN THE POSITION OF THE CLINKERING ZONE AT A SUBSTANTIALLY FIXED PREDETERMINED DISTANCE FROM THE DISCHARGE END OF THE KILN.
Claim 2
Independent Claim
161 words
A METHOD FOR PRODUCING CEMENT COMPRISING FEEDING A MAJOR PORTION OF CEMENT RAW MATERIAL INTO THE UPPER FEED END OF A ROTARY CEMENT KILN, ROTATING SAID KILN, FEEDING FUEL INTO THE LOWER DISCHARGE END OF THE KILN AND BURNING IT TO COUNTERCURRENTLY HEAT THE CEMENT RAW MATERIAL AS IT PROGRESSIVELY MOVES DOWN THE KILN THROUGH A CALCINING ZONE AND THEN A CLINKERING ZONE AND IS THEREAFTER DISCHARGED AT THE LOWER DISCHARGE END OF THE KILN AS FULLY CLINKERED MATERIAL, INJECTING A MINOR PORTION OF CEMENT RAW MATERIAL AS A STREAM INTO THE KILN TO IMPINGE ON THE GENERAL AREA OF THE CLINKERING ZONE, SENSING ANY CHANGE IN THE LOCATION OF SAID CLINKERING ZONE, AND VARYING THE RATE OF FEED OF SAID MINOR PORTION OF CEMENT RAW MATERIAL AS A FUNCTION OF INCIPIENT CHANGES IN THE LOCATION OF THE CLINKERING ZONE TO MAINTAIN THE POSITION OF THE CLINKERING ZONE AT A SUBSTANTIALLY FIXED PREDETERMINED DISTANCE FROM THE DISCHARGE END OF THE KILN.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |