Pump control system
Abstract
Abstract A FLUID PUMP IS DRIVEN BY AN ELECTRIC MOTOR AND HAS AN INCREASING FLUID OUTPUT WITH INCREASING MOTOR AND PUMP SPEED AND THE ELECTRIC MOTOR HAS INCREASING SPEED WITH INCREASING APPLIED VOLTAGE. AN ELECTRICAL CIRCUIT IS CONNECTED FOR DRIVING AND CONTROLLING THE MOTOR AND IS RESPONSIVE TO AN INCREASE IN PRESSURE ON THE OUTLET SIDE OF THE PUMP TO CAUSE A DECREASE IN MOTOR APPLIED VOLTAGE TO THUS REDUCE THE MOTOR SPEED AND THE FLUID OUTPUT OF THE PUMP. THE FOREGOING ABSTRACT IS MERELY A RESUME OF ONE GENERAL APPLICATION, IS NOT A COMPLETE DISCUSSION OF ALL PRINCIPLES OF OPERATION OR APPLICATIONS, AND IS NOT TO BE CONSTRUED AS A LIMITATION ON THE SCOPE OF THE CLAIMED SUBJECT MATTER.
Inventors
- 👤 Walter T Bergstrom
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |