Portable mechanical ventricular assistance device
Abstract
Abstract SUBTAINED NEGATIVE PRESURE AND POSITIVE AND NEGATIVE PRESSURE PULSE ARE RESPECTIVELY GENERATED BY A HAND PUMP ASSEMBLY WHICH INCLUDES A MANUALLY OPERABLE HANDLE CONNECTED THROUGH A PISTION ROD TO A SINGLE RECIPROCATING PISTON MOUNTED WITHIN THE CYLINDER OF THE PUMP. THE PISTON EFFECTIVELY DIVIDES THE CYLINDER OF THE PUMP. THE ONE OF WHICH IS COUPLED THROUGH A CONDUIT TO PROVIDE SUSTAINED NEGATIVE PRESSURE. THE REMAINING CHAMBER IS COUPLED THROUGH A SECOND CONDUIT TO PROVIDE FOR THE ALTERNATING POSITIVE AND NEGATIVE PRESSURE PULSES. SUITABLE ADJUSTABLE RELIEF VALVES ARE PROVIDED IN EACH OF THE CONDUITS TO REGULATE THE PRESSURE LEVELS AND THE POSITIVE OR NEGATIVE PRESSURE DIRECTED TO THE CUP. THE PRESENT INVENTION RELATES TO CIRCULATORY SUSTAINING DEVICES, AND MORE PARTICULARLY TO A NOVEL PORTABLE MECHANICAL PUMP DEVICE FOR SUSTAINING BOTH NEGATIVE AND POSITIVE AND NEGATIVE PUMPING ACTIONS AT SEPARATE OUTLETS.
Inventors
- 👤 Peter Schiff
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |