Patent JPS62162584A successfully refreshed from Google Patents.
US3139310A
Expired / Lapsed
US
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Arrangement in axial fans for the transport of dust commingled gases
Assignee: Svenska Flaktfabriken AB
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Filing: 1962-12-31
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Granted: 1964-06-30
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Ljungstrom Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:33
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
AN AXIAL FAN FOR TRANSPORTING DUST-LADEN GASES COMPRISING A RADIALLY-EXTENDING CONCENTRIC HUB MOUNTED ON A ROTATABLE SHAFT, A PLURALITY OF ADJUSTABLE-PITCH FAN BLADES DISPOSED ABOUT THE PERIPHERY OF SAID HUB, SAID HUB HAVING RECESSES ABOUT ITS PERIPHERY, A CIRCULAR BASE PLATE AND ROTATABLE AXLE MOUNTING EACH OF SAID BLADES INTERMEDIATE A RECESS IN SAID HUB AND SAID BLADES, ADJUSTMENT MEANS CONNECTED TO SAID ROTATABLE AXLES TO CAUSE CHANGES IN PITCH OF SAID BLADES, SAID RECESSES HAVING A LARGER DIAMETER THAN SAID BASE PLATES AND SPACED THEREFORM TO DEFINE ANNULAR SLOTS CIRCUMSCRIBING EACH OF SAID BASE PLATES, AND SCAVENGING AIR MEANS CONNECTING TO SAID HUB AND COMMUNICATIVE WITH AT LEAST SOME OF SAID ANNULAR SLOTS TO SUPPLY A GASEOUS MEDIUM THROUGH SAID SLOTS AT A VELOCITY SUFFICIENT TO PREVENT DUST BUILDUP IN SAID SLOTS.
Claim 2
Dependent Claim
133 words
AN AXIAL FAN FOR TRANSPORTING DUST-LADEN GASES COMPRISING A RADIALLY-EXTENDING CONCENTRIC HUB MOUNTED ON A ROTATABLE SHAFT, A PLURALITY OF ADJUSTABLE-PITCH FAN BLADES DISPOSED ABOUT THE PERIPHERY OF SAID HUB, SAID HUB HAVING RECESSES ABOUT ITS PERIPHERY, A CIRCULAR BASE PLATE AND ROTATABLE AXLE MOUNTING EACH OF SAID BLADES INTERMEDIATE A RECESS IN SAID HUB AND SAID BLADES, ADJUSTMENT MEANS CONNECTED TO SAID ROTATABLE AXLES TO CAUSE CHANGES IN PITCH OF SAID BLADES, SAID RECESSES HAVING A LARGER DIAMETER THAN SAID BASE PLATES AND SPACED THEREFORM TO DEFINE ANNULAR SLOTS CIRCUMSCRIBING EACH OF SAID BASE PLATES, AND SCAVENGING AIR MEANS CONNECTING TO SAID HUB AND COMMUNICATIVE WITH AT LEAST SOME OF SAID ANNULAR SLOTS TO SUPPLY A GASEOUS MEDIUM THROUGH SAID SLOTS AT A VELOCITY SUFFICIENT TO PREVENT DUST BUILDUP IN SAID SLOTS.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |