US3619908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cleaning and drying metal chips
Assignee: KLEFSTAD ENGINEERING Co Inc
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Filing: 1970-04-03
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Granted: 1971-11-16
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Expires: 1990-04-03
Abstract
Abstract A SYSTEM FOR CLEANING AND DRYING WET AND OILY METAL CHIPS WITHIN A REVOLVING DRUM BY VAPORIZATION AND COMBUSTION. THE AIR FLOW MOVES IN AN OPPOSED DIRECTION WITH RESPECT TO THE MOVEMENT OF THEMETAL CHIPS. A MAIN HEAT MEANS IS DISPOSED ADJACENT THE INPUT FEED FOR THE CHIPS TO GENERATE HEAT FROM INSIDE THE DRUM TO THE OUTER WALLS THEREOF. THE HEAT MEANS INCLUDES MEANS FOR RESTRICTING DIRECT IMPINGEMENT OF FLAME ONTO THE OILY CHIPS. THE SYSTEM INCLUDES VARIOUS AUTOMATIC CONTROL MEANS TO CONTROL DRUM TEMPERATURE, FEED RATE, AIR FLOW AND AFTERBURNER TEMPERATURE IN A SAFE, EFFICIENT AND ECONOMICAL MANNER.
Inventors
- 👤 William C Kallas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:08
CPC Classifications
F; F26; F26B; F26B23/00; F26B23/02; F26B23/022; F26B11/00; F26B11/02; F26B11/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |