Fluid track sanding apparatus
Abstract
Abstract THIS INVENTION RELATES TO APPARATUS FOR SANDING THE REGIONS OF A ROAD OR PASSAGE ADJACENT TO THE WHEELS OF A VEHICLE TO PREVENT SKIDDING. SAND IS CONDUCTED BY GRAVITY FROM A DOWNWARDLY DIRECTED SPOUT OF A HOPPER TO THE AIR. INLET OF THE CASING OF A CENTRIFUGAL BLOWER HAVING A MOTOR DRIVEN BLADED ROLTATABLE MEMBER THEREIN. A PLURALITY OF AIR OUTLETS ARE DISTRIBUTED ABOUT THE PERIPHERY OF THE CASING. THE SAND IS SUBSTANTIALLY UNIFORMLY DIVIDED BETWEEN THE AIR OUTLETS AND PROPELLED BY AIR UNDER PRESSURE THROUGH HOSE CONNECTIONS TO THE REGIONS OF THE ROAD OR PASSAGE ADJACENT TO THE WHEELS OF THE VEHICLE, A SEPARATE HOSE CONNECTION BEING PROVIDED FROM EACH AIR OUTLET TO A DIFFERENT ONE OF THE REGIONS OF THE ROAD OR PASSAGE. IN ORDER TO PREVENT SAND MOVING BY GRAVITY FROM THE HOPPER INTO THE AIR INLET OF THE CASING AND FILLING THE LATTER WITH SAND BEFORE THE MOTOR IS ENERGIZED TO DRIVE THE BLADED ROTATABLE MEMBER, A SINGLE VALVE STRUCTURE IS PROVIDED AT THE SPOUT OF THE HOPPER. THE VALVE STRUCTURE IS CLOSED, WHEN THE ROTATABLE MEMBER IS STATIONARY AND IS OPENED WHEN THE ROTATABLE MEMBER IS RUNNING.
Inventors
- 👤 Carl Lennart Hultstrom
- 👤 Bolik Anders Eriksson
- 👤 Elvin Efraim Arksten
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |