Drug dispensing pump
Abstract
Abstract A POSITIVE DISPLACEMENT ELASTIC TUBE PUMP HAVING TWO SEPARATE ADJUSTMENTS FOR VARYING THE RATE OF FLOW THROUGH A WIDE RANGE. A PORTION OF THE TUBE BETWEEN INLET AND OUTLET PINCH VALVES IS ALTERNATELY COMPRESSED AGAINST A PLATEN AND RELEASED BY A RECIPROCATING PRESSURE SHOE WHICH BEARS AGAINST A VARIABLE LENGTH OF THE TUBE. THE PRESSURE SHOE COMPRISES A DRUM HAVING A VARIABLE LENGTH EFFECTIVE SURFACE ACTING ON THE TUBE WHICH IS ADJUSTABLE BY ROTATION OF THE DRUM. THE EFFECTIVE LENGTH OF STROKE OF THE PRESSURE SHOE IS VARIABLE BY ADJUSTING THE PLATEN TOWARD AND AWAY FROM THE PRESSURE SHOE. THE PUMP IS ADAPTED TO BE DRIVEN BY A BLOOD PUMP SO THAT WHEN THE PROPER DOSAGE OF MEDICATION FOR THE BLOOD IS SET ON THE DRUG, PUMP, A CHANGE IN SPEED OF THE BLOOD PUMP WILL NOT ALTER THE BLOOD-MEDICINE RATIO.
Inventors
- 👤 Miles Lowell Edwards
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 |