Air lock
Abstract
Abstract AIR LOCK FOR INTRODUCING MATERIAL INTO AN AIR CONVEYING LINE WHILE PREVENTING BLOWBACK TO A MATERIAL SUPPLY CONTAINER. MATERIAL MOVES INTO A RECEIVER AND IS CARRIED TO A MIXING CHAMBER FOR ENTRAINMENT BY AN AIRSTREAM. A SWINGING GATE, SEALED EXCEPT AT THE BOTTOM, CONTROLS FLOW OF MATERIAL INTO THE MIXING CHAMBER, AND THE ENTRAINING AIR ENTERS THE CHAMBER AND FLOWS ACROSS THE BACK OF THE GATE, URGING THE GATE TOWARD CLOSED POSITION. THE GATE IS MECHANICALLY URGED TOWARD CLOSED POSITION ALSO. THE GATE IS PROVIDED WITH SEALS TO COMPLETELY SHUT OFF SUPPLY OF MATERIAL, AND THE GATE AND ITS SEAT COOPERATE TO CUT THROUGH MATERIAL AT THE GATE TO INSURE COMPLETE CLOSURE. BLOWBACK TO THE MATERIAL SUPPLY IS KPREVENTED BY AN AIR OUTLET OUTSIDE THE MIXING CHAMBER ADJACENT THE GATE, AND BY A SURGE CHAMBER ADJACENT THE RECEIVER. CONVEYING AIR CAN BE BYPASSED TO CLEAN THE AIR LOCK.
Inventors
- 👤 Joseph S Herr
Bibliographic Details
Claims Analysis
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |