Electrical in-tank fuel pump
Abstract
Abstract AN ELECTRICAL MOTOR AND PUMP UNI FOR MOUNTING IN AN AUTOMOTIVE OR OTHER COMBUSTION-ENGINE FUEL TANK TO PUMP LIQUID FUEL TO THE ENGINE. A CIRCULAR REGENERATIVE FUEL PUMP HAS ITS ROTOR ON THE ARMATURE SHAFT OF A PERMANENTMAGNET MOTOR MOUNTED IN A COMMON CYLINDRICAL HOUSING. ROTOR BLADE SPACING FOLLOWS AN ORDERLY MATHEMATICAL PROGRESSION. THE FERRITE MOTOR FIEL MAGNET IS A RELATIVELY THIN-WALLED CYLINDIRCAL HAVING LARGE AIR-GAP CLEARANCE FROM THE ARMATURE AND LYING AGAINST THE CYLINDRICAL HOUSING WHICH FORMS A RETURN FLUX PATH. FULL PUMP DELIVERY FLOW POASSES THROUGH THE LARGE AIR GAP, AND HYDRAULIC GAIN FROM IMPROVED FLOW THROUGH SUCH AIR GAP OFFSETS ANY ELECTRICAL LOSS. THE USE OF A PERIPHERAL THIN-WALL MAGNET PROVIDES OPEN INTERIOR SPACE WHICH PERMITS A LARGE COMMUTATOR AND BRUSH CONTACT AREA.
Inventors
- 👤 John E Shultz
- 👤 Wilfred W Herderhorst
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |